Patent Publication Number: US-8973183-B1

Title: Sheet for a split-top adjustable bed

Description:
BACKGROUND 
     Beds can also be designed to be movable or adjustable to positions other than a traditional flat, horizontal support surface. For example, the bed can include one or more articulable sections that can be raised and lowered, for example to adjust a position of the user&#39;s head and upper torso or to adjust a position of the user&#39;s legs, or both. In beds designed for two users, such as queen-sized or king-sized beds, the bed can be configured to be adjustable as well. However, typically an adjustable two-person bed must either be a single mattress wherein both sides of the bed must be adjusted the same way or two separate adjustable mattresses positioned proximate to each other. 
     The single-mattress adjustable design can be undesirable because it may not allow for individual control of each side of the bed, and thus cannot accommodate the positional preferences of both users of a two-person bed at the same time. The separate-mattress adjustable design can provide for individual positional control of each side of the bed, but is aesthetically unpleasing, e.g., for a married couple, because it resembles a pair of twin beds that have been pushed together. The separate-mattress adjustable design can also have functional issues due to the presence of the gap between the two separate mattresses that runs laterally along the middle of the bed, such as limited support for the bed users along the gap. 
     SUMMARY 
     The present disclosure is directed to a sheet that can be used with a sleep system comprising a mattress where at least one portion of the bed is longitudinally split between each side of the bed so that the split portions can be adjusted independently, and a second portion of the mattress that is joined together across substantially the entire width of the bed. The sheet can include one or more features that can provide for better durability of the sheet, or can provide for better performance of the sheet during articulation of the mattress. 
     In an example, a sheet for covering at least a portion of a mattress that includes a movable first section and a movable second section that is laterally adjacent to and proximate to the movable first section is provided. The sheet comprises a first sheet section configured to cover at least a portion of the movable first section of the mattress, a second sheet section laterally adjacent to the first sheet section, the second sheet section configured to cover at least a portion of the movable second section of the mattress, wherein the first sheet section and the second sheet section are joined together at a sheet junction, a first member projecting laterally from the first sheet section toward the second sheet section, the first member extending up to the sheet junction, and a second member projecting laterally from the second sheet section toward the first sheet section, the second member extending up to the sheet junction, wherein at least a portion of the first member overlays at least a portion of the second member proximate to the sheet junction. 
     In another example, a sheet for covering at least a portion of a mattress that includes a movable first section and a movable second section that is laterally adjacent to and proximate to the movable first section is provided. The sheet comprises a top member configured to cover a top surface of the mattress and one or more side members coupled to the top member, the one or more side members being configured to cover one or more side surfaces of the mattress, wherein a first portion of a the one or more side members is configured to cover a side surface of the movable first section that is adjacent to the second movable section, wherein a second portion of the one or more side members is configured to cover a side surface of the movable second section that is adjacent to the first movable section so that when the sheet is covering the mattress the first portion of the one or more side members is proximate to or in contact with the second portion of the one or more side members, and wherein the first portion of the one or more side members and the second portion of the one or more side members comprise one or more reduced-friction materials. 
     These and other examples and features of the present systems and methods will be set forth in part in the following Detailed Description. This Summary is intended to provide an overview of the present subject matter, and is not intended to provide an exclusive or exhaustive explanation. The Detailed Description below is included to provide further information about the present systems and methods. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         FIG. 1  is a perspective view of an example two-person sleep system including an adjustable bed having a split upper portion and a joined lower portion shown with both sides of the bed being in a horizontal or flat position. 
         FIG. 2  is a perspective view of the example sleep system of  FIG. 1  with a head portion of one of the sides of the bed being raised. 
         FIG. 3  is a side view of the example sleep system of  FIGS. 1 and 2 , shown with a head portion of one of the sides of the bed being raised. 
         FIG. 4  is a top view of the example sleep system of  FIGS. 1-3 . 
         FIG. 5  is a top view of another example two-person sleep system including an adjustable bed having a split upper portion and a joined lower portion. 
         FIG. 6  is a top view of another example two-person sleep system including an adjustable bed having a split upper portion and a joined lower portion. 
         FIGS. 7A-7C  are a flow diagram of an example method for controlling a sleep system. 
         FIG. 8  is a perspective view of an example two-person sleep system including an adjustable bed having a split upper portion, a split lower portion, and a joined middle portion, shown with both sides of the bed being in a horizontal or flat position. 
         FIG. 9  is a perspective view of the example sleep system of  FIG. 8  with a head portion and a leg portion of one of the sides of the bed being raised. 
         FIG. 10  is a side view of the example sleep system of  FIGS. 8 and 9 , shown with a head portion and a leg portion of one of the sides of the bed being raised. 
         FIG. 11  is a top view of the example sleep system of  FIGS. 8-10 . 
         FIG. 12  is a top view of another example two-person sleep system including an adjustable bed having a split upper portion, a split lower portion, and a joined middle portion. 
         FIG. 13  is a schematic diagram of an example controller for controlling actuators of an adjustable sleep system. 
         FIG. 14  is a perspective view of an example sheet configured to cover an example mattress having a split upper portion, a split lower portion, and a joined middle portion. 
         FIG. 15  is a close-up top view of the example sheet of  FIG. 14 . 
     
    
    
     DETAILED DESCRIPTION 
     This disclosure describes a sleep system including an adjustable bed configured for two occupants to share. The adjustable bed can be configured so that at least a first portion of each side (e.g., left side and right side) of the bed can be independently adjusted by the occupant of each particular side of the bed, e.g., so that each occupant can select a particular position or positions that he or she prefers, while a second portion of each side is joined together with a corresponding portion of the other side of the bed. The adjustability of the first portion of each side and the joined nature of the second portion can allow for a user to independently control the position of the first portion his or her side of the bed and can provide for a unitary mattress at the second portion of the bed, which can provide for better joint support across both sides of the bed. 
       FIGS. 1 and 2  show a perspective view of an example sleep system  10 . The sleep system  10  can include a bed  12  that is configured and intended to be used by two occupants, a first occupant  14  and a second occupant  16 . The bed  12  can include a mattress  18  supported by a frame  19 . The bed  12  can be conceptually divided into a first sleep area  20  for the first occupant  14  located on a first side of the bed  12  (e.g., the left side in  FIGS. 1 and 2 ) and a second sleep area  22  for the second occupant  16  on a second side of the bed  12  (e.g., the right side in  FIGS. 1 and 2 ). 
     At least a portion of each of the sleep areas  20 ,  22  can be movable or articulable between a plurality of positions to provide the occupants  14 ,  16  with the ability to select a preferred position for comfort of for a particular purpose. Each sleep area  20 ,  22  can include one or more articulable sections. In an example, the first sleep area  20  can include a section  24  that can be raised and lowered to adjust a position of the head or upper torso, or both, of the first occupant  14  (referred to herein as the first head section  24 ), a section  26  that can be raised and lowered to adjust a position of the legs or lower torso, or both, of the first occupant  14  (referred to herein as the first leg section  26 ), and a section  28  positioned longitudinally between the first head section  24  and the first leg section  26  (referred to herein as the first middle section  28 ). Similarly, the second sleep area  22  can include a section  30  that can be raised and lowered to adjust a position of the head or upper torso, or both, of the second occupant  16  (referred to herein as the second head section  30 ) that is adjacent to the first head section  24 ; a section  32  that can be raised and lowered to adjust a position of the legs or lower torso, or both, of the second occupant  16  (referred to herein as the second leg section  32 ) that is adjacent to the first leg section  26 ; and a section  34  positioned longitudinally between the second head section  30  and the second leg section  32  (referred to herein as the second middle section  34 ) that is adjacent to the first middle section  28 . The middle sections  28 ,  34  can be configured to support the trunk area of the occupants  14 ,  16  (e.g., the middle torso around the waist and a portion of the upper legs), and can be configured to be movable (e.g., raised and lowered) or can be configured to be stationary and to remain in the same position and orientation throughout operation of the bed, depending on the desired operability of the bed  12 . 
     As shown in  FIGS. 1 and 2 , the mattress  18  can be configured so that a first portion of the first sleep area  20  is independently articulable from a corresponding adjacent first portion of the second sleep area  22 , and vice versa, so that the first portion of the second sleep area  22  is independently articulable from the corresponding first portion of the first sleep area  20 . In the example shown in  FIGS. 1 and 2 , the first head section  24  and the second head section  30  are adjacent to one another and can be articulated upward or downward independent of one another. The independent articulation of the head sections  24 ,  30  can be provided for by a medial split  36  extending longitudinally from an upper end  38  of the mattress  18 . As described in more detail below, each of the head sections  24 ,  30  can be articulated with one or more actuators, such as one or more articulable motors so that each head section  24 ,  30  is an independently movable section of the mattress  18 . 
     The mattress  18  can also be configured so that a second portion of the first sleep area  20  and a corresponding second portion of the second sleep area  22  are coupled together and configured to be moved together in a substantially synchronized manner. For example, as shown in the mattress  18  of  FIGS. 1 and 2 , the middle sections  28 ,  34  are joined together as a substantially unitary middle section and the leg sections  24 ,  32  are joined together as a substantially unitary leg section so that the sections  24 ,  28 ,  32 ,  34  together resemble a single joined lower section  40  of the mattress  18 . As described in more detail below, one or both of the leg sections  26 ,  32  and the middle sections  28 ,  34  of each sleep area  20 ,  22  can be articulated with one or more actuators, such as one or more articulable motors so that the sections  24 ,  28 ,  32 ,  34  can act together as a single movable joined lower section  40 . 
     As best seen in  FIG. 4 , the mattress  18  can comprise a movable first section (e.g., the first head section  24 ) extending laterally along a first portion W A1  of the total width W A  of the mattress  18  and extending longitudinally along a first portion L A1  of the total length L A  of the mattress  18 . Similarly, the mattress  18  can comprise a movable second section (e.g., the second head section  30 ) extending laterally along a second portion W A2  of the width W A  of the mattress  18  and extending longitudinally along the same first portion L A1  of the length L A  of the mattress as the first movable section (e.g., the first head section  24 ). The mattress  18  can also comprise a movable third section (e.g., the joined lower section  40  formed by the joined and substantially unitary first leg section  26 , second leg section  32 , first middle section  28 , and second middle section  34 ) extending laterally across substantially the entire width W A  of the mattress  18  and extending longitudinally along a second portion L A2  of the length L A  of the mattress  18   
       FIGS. 2 and 3  show a perspective view and a side view, respectively, of an example configuration of the bed  12  wherein the first sleep area  20  is in a first configuration while the second sleep area  22  is in a second configuration. For example, as shown in  FIGS. 2 and 3 , the first sleep area  20  includes the first portion (e.g., the portion of the first sleep area  20  that is independently movable relative to a corresponding first section of the second sleep area  22 ) being articulated relative to the rest of the first sleep area  20 . The example shown in  FIGS. 2 and 3  show the first head section  24  being elevated relative to the horizontal position ( FIG. 1 ). In the example shown in  FIGS. 2 and 3 , the second sleep area  22  is in a flat configuration with the second head section  30 , the second middle section  34 , and the second leg section  32  being in a horizontal or substantially horizontal orientation. Thus, the second sleep area  22  is in the same or substantially the same configuration in  FIGS. 2 and 3  as it is in  FIG. 1 . 
     The sleep system  10  can also include a pair of user controlling devices  42 ,  44  to allow each occupant  14 ,  16  to control the articulation of his or her respective sleep area  20 ,  22 . As shown in  FIGS. 1-3 , the sleep system  10  can include a first user controlling device  42 , e.g., a first handheld remote control  42 , that has been programmed to control operation of the first sleep area  20 , and a second user control device  44 , e.g., a second handheld remote control  44 , that has been programmed to control operation of the second sleep area  22 . The first occupant  14  can use the first remote control  42  to control operation of the first sleep area  20 , upon which the first occupant  14  is lying, and the second occupant  16  can use the second remote control  44  to control operation of the second sleep area  22  upon which the second occupant  16  is lying. In order to ensure proper linking between each remote control  42 ,  44  and the corresponding sleep area  20 ,  22 , each remote control  42 ,  44  can include an address or other unique identifier, for example to distinguish the first remote control  42  from the second remote control  44 . 
     In an example, the first occupant  14  can select, via the first remote control  42 , to control articulation of the first head section  24  upward or downward by a certain amount. The first remote control  42  can also be configured to control articulation of the joined lower section  40  (e.g., to control articulation of one or both of the joined leg sections  26 ,  32  and the joined middle sections  28 ,  34 ), for example to move the leg sections  26 ,  32  upward or downward by a certain amount. The second occupant  16  can select, via the second remote control  44 , to control articulation of the second head section  30  upward or downward by a certain amount. The second remote control  44  can also be configured to control articulation of the joined lower section  40  (e.g., to control articulation of one or both of the joined leg sections  26 ,  32  and the joined middle sections  28 ,  34 ). In an example, articulation of the joined lower section  40  can be controlled by only the first remote control  42 , by only the second remote control  44 , or by both the first remote control  42  and the second remote control  44 . 
     In an example, articulation of the head sections  24 ,  28  or the joined lower section  40 , or both, can be controlled to occur continuously or along a discrete set of positions between a minimum height or orientation and a maximum height or orientation. For example, the head section  24 ,  28  and the joined lower section  40  can be articulable from a minimum height position (e.g., flat) to a maximum height position (e.g., with the head section  24 ,  28  at a maximum angle with respect horizontal, such as about 60°, or with the leg section  26 ,  32  forming a maximum angle with respect to horizontal, such as about 45°). 
     The sleep system  10  can also be configured so that each sleep area  20 ,  22  can be positioned into one or more predetermined or preset positions. For each preset position, the head section  24 ,  28  (and in some cases, the joined lower section  40 ) can be moved to predetermined positions or orientations. Examples of preset positions that can each be programmed into the sleep system  10  include, but are not limited to:
         (a) a flat preset, e.g., with the head section  24 ,  28  and the joined lower section  40  being in a horizontal or substantially horizontal orientation;   (b) a “reading” preset, e.g., with the head section  24 ,  28  being at an elevated or angled position relative to horizontal to allow the occupant  14 ,  16  to read a book, magazine, or other written material. A reading preset can also include elevating a portion of the joined lower section  40  to make reading more comfortable for the occupant  14 ,  16 ;   (c) a “television” preset, e.g., with the head section  24 ,  28  being elevated or angled relative to horizontal at a different angle relative to the “reading” preset, to allow the occupant  14 ,  16  to comfortably watch television. The television preset can also include elevating a portion of the joined lower section  40  to make viewing more comfortable for the occupant  14 ,  16 ; and   (d) a “snore” present, e.g., a position to reduce snoring by the occupant  14 ,  16 . It has been found that, in some cases, snoring can be reduced or prevented by elevating the snorer&#39;s head or torso by a small amount, which can reduce vibration of soft tissue in the back of the mouth or the throat of a user when the soft tissue becomes relaxed during sleep. The slight elevation of the snorer&#39;s body can also induce the snorer to change his or her sleeping position, which can cause the snoring to stop. In an example, the “snore preset” can be configured to elevate the head section  24 ,  28  from horizontal by a small angle of from about 5° to about 15° from horizontal, such as about 7°.       

       FIG. 4  shows a top view of the sleep system  10 . As shown in  FIG. 4 , the sleep system  10  can include an a reticulation system  50  for controlling articulation of the articulable sections  24 ,  30 ,  40 . The articulation system  50  can include a set of articulating actuators, with each articulable section being articulated by one or more of the actuators. An example of an actuator that can be used for articulating the articulable sections  24 ,  30 ,  40  can include one or more motors. For example, a first head motor  52  can be configured to articulate the first head section  24  of the first sleep area  20  and a second head motor  54  can be configured to articulate the second head section  30  of the second sleep area  22 . One or more leg motors can be configured to articulate the joined lower section  40 . For example, as shown in  FIG. 4 , the joined lower section  40  can be articulated by a first leg motor  56 A on a first side of the mattress  18  (e.g., to articulate the first leg section  26  on the side of the first sleep area  20 ) and a second leg motor  56 B on a second side of the mattress  18  (e.g., to articulate the second leg section on the side of the second sleep area  22 ). 
     As described in more detail below, the articulation system  50  can be configured to control the one or more leg motors  56 A,  56 B so that the articulation of the joined lower section  40  is substantially uniform. The term “substantially uniform,” as used herein, can refer to the joined lower section  40  articulating so that a reference line extending laterally across the joined lower section  40  will remain substantially horizontally level (e.g., substantially parallel to the surface upon which the sleep system  10  is resting) as the lower section  40  is articulated upward or downward. In an example, the articulation system  50  can be configured to control the one or more leg motors  56 A,  56 B so that the articulation of the first leg section  26  and the second leg section  32  is substantially synchronized. The term “substantially synchronized,” as used herein, can refer to each point on the first leg section  26  being at substantially the same vertical position as a corresponding point on the second leg section  32  at substantially the same time, and in an example, so that the height of the first leg section  26  and the second leg section  32  are substantially uniform. In an example, “substantially synchronized” can refer to each point of a first movable section is at the same vertical position as a corresponding point of the substantially synchronized second movable section so that a horizontal line extending laterally across the substantially synchronized sections is substantially horizontally level during articulation of the sections, e.g., so that the horizontal line is substantially parallel to the surface upon which the sleep system is resting. “Substantially synchronized” can also refer to the actuator or actuators that articulate the substantially synchronized sections can be configured to move substantially the same amount over substantially the same period of time so that the sections that are substantially synchronized seem to move as a single piece. 
     The mattress  18  can include one or more supporting structures for supporting the occupants  14 ,  16  within the movable first section (e.g., the first head section  24 ), the movable second section (e.g., the second head section  30 ), and a joined third section (e.g., the joined lower section  40 ). In an example, the mattress  18  can include a set of one or more supporting structures, such as one or more first air chambers, for the first sleep area  20 , for example, carried in a case the forms the first movable section (e.g., the first head section  24 ) and a first portion of the third section (e.g., the portion of the joined lower section  40  that makes up part of the first sleep area  20 ). The mattress  18  can also comprise one or more second supporting structures, such as one or more second air chambers, for the second sleep area  22 , for example, carried in the portions of the case that forms the second movable section (e.g., the second head section  30 ) and a second portion of the third section (e.g., the portion of the joined lower section  40  that makes up part of the second sleep area  22 ). 
     The articulation system  50  can also include one or more controllers, such as a control box that includes the electronics and hardware for providing instructions to the articulating motors  52 ,  54 ,  56 A,  56 B.  FIG. 4  is a top view of the example sleep system  10 , showing the articulation system  50  including a single, common controller  60  that is configured to control each of the sleep areas  20 ,  22 , e.g., each of the articulating motors  52 ,  54 ,  56 A,  56 B. Each remote control  42 ,  44  can be in communication with the controller  60 , such as via a wireless communication link  62 ,  64 . The remote controls  42 ,  44  can send movement control signals to the controller  60  via the communication links  62 ,  64 . A “movement control signal,” as used herein, can refer to a signal or plurality of signals sent from a remote control  42 ,  44  to the controller  60  corresponding to a particular movement or position of one or more of the articulable sections  24 ,  30 ,  40 . A movement control signal can include one or more instructions for the direction of movement of a particular articulable section  24 ,  30 ,  40 , e.g., the direction of movement of a corresponding articulating motor  52 ,  54 ,  56 A,  56 B, a speed for the movement of a particular articulable section  24 ,  30 ,  40  or of a particular articulating motor  52 ,  54 ,  56 A,  56 B, or an overall position of the corresponding sleep area  20 ,  22  being controlled by the remote control  42 ,  44 , such as a preset position. 
     The controller  60  can send one or more motor control signals to one or more of the articulating motors  52 ,  54 ,  56 A,  56 B corresponding to a desired motion of each articulating motor  52 ,  54 ,  56 A,  56 B. A “motor control signal,” as used herein, can refer to a signal or plurality of signals sent from a controller, such as the controller  60 , to one or more articulating motors  52 ,  54 ,  56 A,  56 B corresponding to a particular movement or position of one or more articulable sections  24 ,  30 ,  40 . A motor control signal or signals can comprise an instruction for one or both of the direction that each articulating motor  52 ,  54 ,  56 A,  56 B should articulate and the speed at which the articulating motor  52 ,  54 ,  56 A,  56 B should travel. In an example, a plurality of communication cables  66 A,  66 B,  66 C, and  66 D (collectively referred to herein as “cable  66 ” or “cables  66 ”) can carry the motor control signals from the controller  60  to the articulating motors  52 ,  54 ,  56 A,  56 B, with each cable  66  corresponding to a particular motor (such as a first cable  66 A for the first head motor  52 , a second cable  66 B for the second head motor  54 , a third cable  66 C for one leg motor  56 A, and a fourth cable  66 D for the other leg motor  56 B). 
     In another example, a sleep system  70  can include an articulating system  72  having more than a single common controller. In the example shown in  FIG. 5 , each sleep area  20 ,  22  can have its own controller, such as a first controller  74 A corresponding to the upper or head portion of the mattress  18 , e.g., by being configured to control the first head motor  52  and the second head motor  54 , and a second controller  74 B corresponding to the lower or leg portion of the mattress  18 , e.g., by being configured to control the leg motors  56 A,  56 B. In such an example, each remote control  42 ,  44  can be linked to both controllers  74 A,  74 B via one or more wireless communication links  62 ,  64  and each controller  74 A,  74 B can be configured to respond to commands sent from both remote controls  42 ,  44 , depending on which remote control  42 ,  44  is sending the command. 
     If, for example, the first occupant  14  wishes to articulate his or her head and upper torso upward or downward, he or she can make a selection on the first remote control  42  that can instigate the transmission of a movement control signal from the first remote control  42  via wireless communication link  62 A to the first controller  74 A, which in turn can send a motor control signal to the first head motor  52 . Similarly, if the first occupant  14  wishes to articulate his or her feet, he or she can make a selection on the first remote control  42  that can instigate the transmission of a movement control signal via the wireless communication link  62 B to the second controller  74 B, which in turn can send a motor control signal to the leg motors  56 A,  56 B. If, for example, the second occupant  16  wishes to articulate his or her head and upper torso upward or downward, he or she can make a selection on the second remote control  44  that can instigate the transmission of a movement control signal from the second remote control  44  via wireless communication link  64 A to the first controller  74 A, which in turn can send a motor control signal to the second head motor  54 . Similarly, if the second occupant  16  wishes to articulate his or her feet, he or she can make a selection on the second remote control  44  that can instigate the transmission of a movement control signal via the wireless communication link  64 B to the second controller  74 B, which in turn can send a motor control signal to the leg motors  56 A,  56 B. 
     In another example sleep system  80  shown in  FIG. 6 , each of the separate controllers  84 A,  84 B can be linked to a corresponding remote control  42 ,  44 , and each controller can be configured to control a corresponding one of the sleep areas  20 ,  22 . For example, a first of the separate controllers  84 A can be configured to control the positioning of the first sleep area  20  by controlling the first head motor  52  and a first leg motor  56 A. A second controller  84 B can be configured to control positioning of the second sleep area  22  by controlling the second head motor  54  and a second leg motor  56 B. In such an example, each controller  84 A,  84 B can be configured to respond to commands sent from only one of the remote controls  42 ,  44 , such as the first controller  84 A being linked to the first remote control  42  via a first wireless communication link  62  and the second controller  84 B being linked to the second remote control  44  via a second wireless communication link  64  each remote control  42 ,  44  can send movement control signals to a corresponding controller  84 A,  84 B, similar to the transmission of movement control signals described above with respect to a single controller  60 . 
     In the example sleep system  70  shown in  FIG. 5 , each separate controller  74 A,  74 B (collectively referred to herein as “controller  74 ” or “controllers  74 ”) can include communication links, such as cables, to the articulating motors  52 ,  54 ,  56 A,  56 B that are controlled by that particular controller  74 . For example, the first controller  74 A can be linked to the first head motor  52  via a first cable  76 A and to the second head motor  54  via a second cable  76 B. Similarly, the second controller  74 B can be linked to the first leg motor  56 A via a first cable  78 A and to the second leg motor  56 B via a second cable  78 B. The controllers  74 A and  74 B can be in communication with each other via a communication link, such as a cable  79  running between the controllers  74 A,  74 B to pass control signals between the controllers  74 A,  74 B. 
     In the example sleep system  80  shown in  FIG. 6 , each separate controller  84 A,  84 B (collectively referred to herein as “controller  84 ” or “controllers  84 ”) can include communication links, such as cables, to the articulating motors  52 ,  54 ,  56 A,  56 B that are controlled by that particular controller  84 . For example, the first controller  84 A can be linked to the first head motor  52  via a first cable  86 A and to the first leg motor  56 A via a second cable  86 B. Similarly, the second controller  84 B can be linked to the second head motor  54  via a first cable  88 A and to the second leg motor  56 B via a second cable  88 B. The controllers  84 A and  84 B can be in communication with each other via a communication link, such as a cable  89  running between the controllers  84 A,  84 B to pass control signals between the controllers  84 A,  84 B. 
     In examples where the supporting structures of the mattress  18  comprise air chambers, the sleep system  10 ,  70 ,  80  can also comprise an inflation system configured to control the pressure within the air chambers. The inflation system can comprise one or more pumps configured to inflate or deflate the air chambers, and one or more controllers configured to control the one or more pumps. In an example, the one or more controllers that control articulation of the mattress  18  (e.g., the single controller  60  or the plurality of controllers  74 A,  74 B or controllers  84 A,  84 B) can also be configured to control operation of the one or more pumps. In another example, one or more separate controllers for controlling operation of the one or more inflation pumps can be provided that are separate from the one or more controllers for controlling articulation of the mattress  18 . 
     In an example, the inflation system can provide for individual control of the air pressure within each air chamber or within one or more sets of air chambers. For example, if a first set of one or more air chambers is located in the first sleep area  20  and a second set of one or more air chambers is located in the second sleep area  22 , then the inflation system can be configured to individually control the pressure in the first set of air chambers in order to control the firmness of one or more portions or the entirety of the first sleep area  20  and the inflation system can be configured to individually control the pressure in the second set of air chambers in order to control the firmness of one or more portions or the entirety of the second sleep area  22 . In an example, the user controlling devices  42 ,  44  can also be configured to control the inflation system, such as by communicating with the controllers of the inflation system to control the pump. Each user controlling device  42 ,  44  can be configured to control inflation of the air chambers associated with a corresponding one of the sleep areas  20 ,  22 , e.g., so that the first occupant  14  can control the firmness of the first sleep area  20  and the second occupant  16  can control the firmness of the second sleep area  22 . 
       FIGS. 7A-7C  show a flow diagram of an example method  100  of controlling articulation of the sleep system  10 ,  70 , or  80 . At  102 , the first occupant  14  selects a particular position for a movable first section of the mattress  18 , such as the first head section  24 , using the first remote control  42 . For example, the first occupant  14  can select a specific button or combination of buttons on the first remote control  42  that correspond to a “flat” position for the first head section  24  or a particular elevated position for the first head section  24 , such as a snore reducing position, or a TV viewing or reading position. 
     At  104 , the first remote control  42  can send a movement control signal to one or more controllers, such as the controller  60  ( FIG. 4 ) or the two or more controllers  74  ( FIG. 5 ) or controllers  84  ( FIG. 6 ). The movement control signal can include a first address or other unique identifier that identifies that it is the first remote control  42  that is sending the movement control signal that is different from an address or unique identifier that is transmitted from other remote controls, such as the second remote control  44 . The movement control signal can also include a second address or unique identifier that indicates which articulable section  24 ,  40  is to be moved according to the movement control signal, e.g., that indicates that the first head section  24  is to be moved according to the movement control signal. In an example, the movement control signal can include a header that includes a predetermined sequence of the first address (e.g., identifying the remote control  42 ,  44  sending the signal) and the second address (e.g., identifying the articulable section  24 ,  40  to be moved according to the instructions in the signal). 
     At  106 , the one or more controllers  60 ,  74 ,  84  receive the movement control signal and determine what action to take. Determining what action to take can include the one or more controllers  60 ,  74 ,  84  determining which remote control  42 ,  44  sent the movement control signal, for example by analyzing the header and reading the address contained therein. A controller  60 ,  74 ,  84  the receives the movement control signal can then determine whether the movement control signal is intended for itself, or for another controller  60 ,  74 ,  84 . In the case of a single controller  60 , each movement control signal is intended for the controller  60  unless a remote control from another sleep system is being used. However, when more than one controller  74 ,  84  is included, as in  FIGS. 5 and 6 , then the movement control signal can be intended for both controllers  74 , e.g., depending on whether a head section or leg section is to be articulated (as in the sleep system  70 ), or can be intended for only a particular controller  84  (e.g., where each remote control and each controller  84  are configured for only one sleep area, as in sleep system  80 ). 
     For example, in the sleep system  70  of  FIG. 5 , if the first controller  74 A receives one or more first movement control signals with an address corresponding to the first remote control  42  that instructs to move the first head section  24 , then the first controller  74 A can determine that it should send one or more first motor control signals to the corresponding first head motor  52 . But, if the first controller  74 A receives a movement control signal with an address corresponding to the first remote control  42  that instructs to move the joined lower section  40 , then the first controller  74 A can determine that it should either ignore the movement control signal or pass the movement control signal to the second controller  74 B, e.g., via the cable  79 . 
     In another example, in the sleep system  80  of  FIG. 6 , if the first controller  84 A receives a movement control signal with an address corresponding to the first remote control  42 , then the first controller  84 A can determine that it should send a motor control signal to one or more corresponding articulating motor  52 ,  56 A,  56 B. But, if the first controller  84 A receives a movement control signal with an address corresponding to the second remote control  44 , then the first controller  84 A can choose to ignore the movement control signal or alternatively can pass the signal to the second controller  84 B, e.g., via the cable  89 . 
     At  108 , the one or more controllers  60 ,  74 ,  84  can formulate a motor control signal to be sent to one or more of the articulating motors  52 ,  44 ,  56 A,  56 B. The motor control signal or signals for each articulating motor  52 ,  44 ,  56 A,  56 B can include what action the articulating motor  52 ,  44 ,  56 A,  56 B should take, such as what direction the articulating motor  52 ,  44 ,  56 A,  56 B should move, at what speed, and for how long. The motor control signal or signals can also include the timing and order of the actions that each articulating motor  52 ,  44 ,  56 A,  56 B is to take. 
     For example, if the controller  60  (or a first controller  74 A or  84 A in the case of two controllers) receives one or more first movement control signals from the first remote control  42  indicating that the first head section  24  should be articulated, then the controller  60 ,  74 A,  84 A can determine that one or more first motor control signals can be sent directly to the first head motor  52 . In the case of systems with two or more controllers, if a second controller  74 B,  84 B receives the one or more first movement control signal from the first remote control  42  indicating that the first head section  24  should be articulated, then the second controller  74 B,  84 B can send a control signal to the first controller  74 A,  84 A via the cable  79 ,  89  that can trigger the first controller  74 A,  84 A to formulate one or more appropriate first motor control signals for the first head motor  52 . 
     At  110 , the controller  60 ,  74 ,  84  can send the one or more motor control signals to the appropriate articulating motor or motors  52 ,  44 ,  56 A,  56 B, such as via the cables  66 ,  76 ,  78 ,  86 , or  88 . In an example, the motor control signal can include an address or unique identifier corresponding to the articulating motor  52 ,  44 ,  56 A,  56 B to which the control signal is being directed. The address can be placed in a header of the control signal, similar to the address for the remote controls  42 ,  44  in the movement control signals described above. 
     In the case of one or more first movement control signals that are sent from the first controller  42  to articulate the first head section  24 , the controller  60 ,  74 A, or  84 A can send the one or more first motor control signals to the first head motor  52  that will move the first head section  24  to be at the selected position indicated in the first movement control signal. 
     In an example, before sending a signal to the articulating motor  52 ,  44 ,  56 A,  56 B, the controller  60 ,  74 ,  84  can determine the current position of each articulable section  24 ,  30 ,  40 . The controller  60 ,  74 ,  84  can store the current position of each articulable section  24 ,  30 ,  40  in a memory within the controller  60 ,  74 ,  84 , or the controller  60 ,  74 ,  84  can determine the current position by requesting a position or orientation reading from a position sensor for each section  24 ,  30 ,  40 . The controller  60 ,  74 ,  84  can compare the current position to the selected position to determine if a particular section  24 ,  30 ,  40  needs to be articulated and in what direction. For example, after accessing or determining the current position of the first head section  24  the controller  60 ,  74 A,  84 A can then determine what direction the first head section  24  is to be moved in order to facilitate the selected position. The controller  60 ,  74 A,  84 A can then send one or more first motor control signals to the first head motor  52  that corresponds to the direction in which the first head section  24  is to be articulated. 
     At  112 , the motor control signal or signals can be received by one or more of the articulating motors  52 ,  44 ,  56 A,  56 B associated with the articulable section or sections  24 ,  30 ,  40  to be articulated. For example, the first head motor  52  can receive the one or more first motor control signals from the controller  60 ,  74 A,  84 A. At  114 , the selected articulating motor or motors  52 ,  44 ,  56 A,  56 B can then articulate the corresponding articulable section or sections  24 ,  30 ,  40  according to the one or more motor control signals so that the selected articulable section or sections  24 ,  30 ,  40  can be moved into the desired position. For example, the first head motor  52  can articulate the first head section  24  to the selected position according to the one or more first motor control signals. 
     At  116 , the second occupant  16  can select a position for a movable second section of the mattress  18 , such as the second head section  30 , using the second remote control  44 . For example, the second occupant  16  can select a specific button or combination of buttons on the second remote control  44  that correspond to a “flat” position for the second head section  30  or a particular elevated position for the second head section  30 , such as a snore reducing position, or a TV viewing or reading position. 
     At  118 , the second remote control  44  can send the one or more second movement control signals to one or more controllers, such as the controller  60  ( FIG. 4 ) or the two or more controllers  74  ( FIG. 5 ) or controllers  84  ( FIG. 6 ). The one or more second movement control signals can include a first address or other unique identifier that identifies that it is the second remote control  44  that is sending the movement control signal that is different from an address or unique identifier that is transmitted from other remote controls, such as the first remote control  42 . The one or more second movement control signals can also include a second address or unique identifier that indicates which articulable section  30 ,  40  is to be moved according to the movement control signal, e.g., that indicates that the second head section  30  is to be moved according to the movement control signal. 
     At  120 , the one or more controllers  60 ,  74 A,  84 B can receive the one or more second movement control signals and can determine what action to take, such as by determining that a motor control signal should be sent to the second head motor  54 . 
     At  122 , the one or more controllers  60 ,  74 A,  84 B can formulate one or more second motor control signals to be sent to the second head motor  54 . The one or more second motor control signals can include what action the second head motor  54  should take, such as what direction the second head motor  54  should move, at what speed, and for how long. The one or more second motor control signals can also include the timing and order of the actions that the second head motor  54  is to take. 
     At  124 , the controller  60 ,  74 A,  84 B can send the one or more second motor control signals to the second head motor  54 , such as via a cable  66 B,  76 B,  88 A. In an example, the motor control signal can include an address or unique identifier corresponding to the second head motor  54 . The address can be placed in a header of the one or more second motor control signals, similar to the address for the remote controls  44  in the movement control signals described above. As noted above, the controller  60 ,  74 A,  84 B can determine the current position of the second head section  30  before sending the one or more second motor control signal. 
     At  126 , the one or more second motor control signal or signals can be received by the second head motor  54 . At  128 , the second head motor  54 B can then articulate the second head section  30  into the desired position according to the one or more second motor control signals. 
     At  130 , either the first occupant  14  or the second occupant  16  can select a position for a movable third section of the mattress  18 , such as the joined lower section  40 , using the first remote control  42  or the second remote control  44 , respectively. For example, the occupant  14 ,  16  can select a specific button or combination of buttons on his or her respective remote control  42 ,  44  that correspond to a “flat” position for the joined lower section  40  or a particular elevated position for the joined lower section  40 . 
     At  132 , the remote control  42 ,  44  can send one or more third movement control signals to one or more controllers  60 ,  74 B,  84 A/ 84 B. At  134 , the one or more controllers  60 ,  74 B,  84 A/ 84 B can receive the one or more third movement control signals and determine what action or actions to take, such as by determining that a motor control signal should be sent to the leg motors  56 A,  56 B. 
     At  136 , the one or more controllers  60 ,  74 B,  84 A/ 84 B can formulate one or more third motor control signals to be sent to the first leg motor  56 A. The one or more third motor control signals can include what action the first leg motor  56 A should take, such as what direction the first leg motor  56 A should move, at what speed, and for how long. The one or more third motor control signals can also include the timing and order of the actions that the first leg motor  56 A is to take. 
     At  138 , the one or more controllers  60 ,  74 B,  84 A/ 84 B can formulate one or more fourth motor control signals to be sent to the second leg motor  56 B. The one or more fourth motor control signals can include what action the second leg motor  56 B should take, such as what direction the second leg motor  56 B should move, at what speed, and for how long. The one or more fourth motor control signals can also include the timing and order of the actions that the second leg motor  56 B is to take. 
     At  140 , the controller  60 ,  74 B,  84 A/ 84 B can send the one or more third motor control signals to the first leg motor  56 A and can send the one or more fourth motor control signals to the second leg motor  56 B. In an example, the one or more third motor control signals can include an address or unique identifier corresponding to the first leg motor  56 A. At  142 , the controller  60 ,  74 B,  84 A/ 84 B can send the one or more fourth motor control signals to the second leg motor  56 B. In an example, the one or more fourth motor control signals can include an address or unique identifier corresponding to the second leg motor  56 B. As noted above, the controller  60 ,  74 B,  84 A/ 84 B can determine the current position of the joined lower section  40  before sending the motor control signals. 
     At  144 , the one or more third motor control signals can be received by the first leg motor  56 A. At  146 , the one or more fourth motor control signals can be received by the second leg motor  56 B. At  148 , the leg motors  56 A,  56 B can be articulated according to the one or more third motor control signals and the one or more fourth motor control signals in order to articulate the joined lower section  40  into the desired position. The one or more third motor control signals and the one or more fourth motor control signals are configured so that movement of the first leg motor  56 A and the second leg motor  56 B are substantially synchronized so that movement of the joined lower section  40  is substantially uniform across the width of the mattress  18 . 
       FIGS. 8-10  show a second example of a sleep system  150 . The sleep system  150  can include a bed  152  that is configured and intended to be used by two occupants, a first occupant  154  and a second occupant  156 . The bed  152  can include a mattress  158  supported by a frame  159 . The bed  152  can be conceptually divided into a first sleep area  160  for the first occupant  154  located on a first side of the bed  152  (e.g., the left side in  FIGS. 8 and 9 ) and a second sleep area  162  for the second occupant  156  on a second side of the bed  152  (e.g., the right side in  FIGS. 8 and 9 ). Thus, sleep system  150  in is similar to sleep system  10  shown in  FIGS. 1-4 . 
     Like with sleep system  10 , at least a portion of each of the sleep areas  160 ,  162  can be movable or articulable between a plurality of positions to provide the occupants  154 ,  156  with the ability to select a preferred position for comfort of for a particular purpose. Each sleep area  160 ,  162  can include one or more articulable sections. In an example, the first sleep area  160  can include a section  164  that can be raised and lowered to adjust a position of the head or upper torso, or both, of the first occupant  154  (referred to herein as the first head section  164 ), a section  166  that can be raised and lowered to adjust a position of the legs or lower torso, or both, of the first occupant  154  (referred to herein as the first leg section  166 ), and a section  168  positioned longitudinally between the first head section  164  and the first leg section  166  (referred to herein as the first middle section  168 ). Similarly, the second sleep area  162  can include a section  170  that can be raised and lowered to adjust a position of the head or upper torso, or both, of the second occupant  156  (referred to herein as the second head section  170 ) that is adjacent to the first head section  164 ; a section  172  that can be raised and lowered to adjust a position of the legs or lower torso, or both, of the second occupant  156  (referred to herein as the second leg section  172 ) that is adjacent to the first leg section  166 ; and a section  174  positioned longitudinally between the second head section  170  and the second leg section  172  (referred to herein as the second middle section  174 ) that is adjacent to the first middle section  168 . The middle sections  168 ,  164  can be configured to support the trunk area of the occupants  154 ,  156  (e.g., the middle torso around the waist and a portion of the upper legs), and can be configured to be movable (e.g., raised and lowered) or can be configured to be stationary and to remain in the same position and orientation throughout operation of the bed, depending on the desired operability of the bed  152 . 
     As shown in  FIGS. 8 and 9 , the mattress  158  can be configured so that a first portion of the first sleep area  160  is independently articulable from a corresponding adjacent first portion of the second sleep area  162 , and vice versa, so that the first portion of the second sleep area  162  is independently articulable from the corresponding first portion of the first sleep area  160 . In the example shown in  FIGS. 8 and 9 , the first head section  164  and the second head section  170  are adjacent to one another and can be articulated upward or downward independent of one another. The independent articulation of the head sections  164 ,  170  can be provided for by a medial split  176  extending longitudinally from an upper end  178  of the mattress  158 . As described in more detail below, each of the head sections  164 ,  170  can be articulated with one or more actuators, such as one or more articulable motors so that each head section  164 ,  170  is an independently movable section of the mattress  158 . 
     As further shown in  FIGS. 8 and 9 , the mattress  158  can be configured so that a second portion of the first sleep area  160  is independently articulable from a corresponding adjacent second portion of the second sleep area  162 , and vice versa, so that the second portion of the second sleep area  162  is independently articulable from the corresponding second portion of the first sleep area  160 . In the example shown in  FIGS. 8 and 9 , the first leg section  166  and the second leg section  172  are adjacent to one another and can be articulated upward or downward independent of one another. The independent articulation of the leg sections  166 ,  172  can be provided for by a medial split  180  extending longitudinally from a lower end  182  of the mattress  158 . As described in more detail below, each of the leg sections  166 ,  172  can be articulated with one or more actuators, such as one or more articulable motors so that each leg section  166 ,  172  is an independently movable section of the mattress  158 . 
     The mattress  158  can also be configured so that a third portion of the first sleep area  160  and a corresponding third portion of the second sleep area  162  are coupled together and configured to either be stationary or to be moved together in a substantially synchronized manner. For example, as shown with the mattress  158  of  FIGS. 8 and 9 , the middle sections  168 ,  174  are joined together as a substantially unitary middle section so that the middle sections  168 ,  174  together resemble a single joined middle section  184  of the mattress  158 . As described in more detail below, the sleep system  150  can be configured so that the middle sections  168 ,  174  can be stationary together, or can be configured so that the middle sections  168 ,  174  can be articulated together, e.g., by one or more articulation actuators, so that the middle sections  168 ,  174  can act together as a single stationary or movable joined middle section  184 . 
     In this way, the sleep system  150  can include a mattress  158  comprising a first sleep area  160  for a first occupant  154 , the first sleep area  160  comprising a first movable upper section, e.g., the first head section  164 , and a first movable lower section, e.g., the first leg section  166 . The mattress  158  can also include a second sleep area  162  for a second occupant  156 , the second sleep area  162  comprising a second movable upper section adjacent to the first movable upper section, e.g., the second head section  170  adjacent to the first head section  164 , and a second movable lower section adjacent to the first lower section, e.g., the second leg section  172  adjacent to the first leg section  166 . The mattress  158  can further include a common middle section extending between the first sleep area and the second sleep area, e.g., the joined middle section  184 , with the common middle section  184  being positioned between the movable upper section  164 ,  170  and the movable lower section  166 ,  172  of each of the first sleep area  160  and the second sleep area  162 . The mattress  158  can be an air bed comprising separate sets of air bladders or air chambers (described in more detail below). Thus, the mattress  158  can include a set of one or more first air chambers being carried by the first movable upper section  164 , the first movable lower section  166 , and a first portion of the common middle section  184 , e.g., the first middle section  168  that makes up the portion of the joined middle section  184  in the first sleep area  160 . Similarly, the mattress  158  can also include a set of one or more second air chambers carried by the second movable upper section  170 , the second movable lower section  172 , and a second portion of the common middle section  184 , e.g., the second middle section  174  that makes up the portion of the joined middle section  184  in the second sleep area  162 . 
     As best shown in  FIG. 11 , the mattress  158  can comprise the movable first section (e.g., the first head section  164 ) extending laterally along a first portion W B1  of the total width W B  of the mattress  158  and extending longitudinally along a first portion L B1  of the total length L B  of the mattress  158 . Similarly, the mattress  158  can comprise a movable second section (e.g., the second head section  170 ) extending laterally along a second portion W B2  of the width W B  of the mattress  158  and extending longitudinally along the same first portion L B1  of the length L B  of the mattress  158  as the first movable section (e.g., the first head section  164 ). The mattress  158  can also comprise a movable third section (e.g., the first leg section  166 ) extending laterally along the same first portion W B1  of the total width W B  as the movable first section (e.g., the first head section  164 ) and extending longitudinally along a second portion L B2  of the length L B  of the mattress  158 . The mattress  158  can also comprise a movable fourth section (e.g., the second leg section  172 ) extending laterally along the same second portion W B2  of the width W B  of the mattress  158  as the movable second section (e.g., the second head section  170 ) and extending longitudinally along the same second portion L B2  of the length L B  as the movable third section (e.g., the first leg section  166 B) of the mattress  158 . The mattress  158  can also comprise a fifth section (e.g., the joined middle section  184 ), which may or may not be movable or articulable, extending laterally along substantially the entire width W B  of the mattress  158  and extending longitudinally along a third portion L B3  of the length L B  of the mattress  158 , where the third portion L B3  of the length L B  can extend medially between the first portion L B1  of the length L B  and the second portion L B2  of the length L B . 
     The mattress  158  can include one or more supporting structures for supporting the occupants  154 ,  156  within the movable first section (e.g., the first head section  164 ), the movable second section (e.g., the second head section  170 ), the movable third section (e.g., the first leg section  166 ), the movable fourth section (e.g., the second leg section  172 ), and the fifth section (e.g., the joined middle section  184 ). In an example, the mattress  158  can include a set of one or more supporting structures, such as one or more first air chambers, for the first sleep area  160 , for example, carried in a case the forms the first movable section (e.g., the first head section  164 ), the third movable section (e.g., the second leg section  172 ), and the fifth section (e.g., the joined middle section  184 ). The mattress  158  can also comprise one or more second supporting structures, such as one or more second air chambers, for the second sleep area  162 , for example, carried in the second movable section (e.g., the second head section  170 ), the fourth movable section (e.g., the second leg section  172 ), and the fifth section (e.g., the joined middle section  184 ). 
     The sleep system  150  can also include a pair of user controlling devices  186 ,  188  to allow each occupant  154 ,  156  to control the articulation of his or her respective sleep area  160 ,  162 . As shown in  FIGS. 8-11 , the sleep system  150  can include a first user controlling device  186 , e.g., a first handheld remote control  186 , that has been programmed to control operation of the first sleep area  160 , and a second user control device  188 , e.g., a second handheld remote control  188 , that has been programmed to control operation of the second sleep area  162 . The first occupant  154  can use the first remote control  186  to control operation of the first sleep area  160 , upon which the first occupant  154  is lying, and the second occupant  156  can use the second remote control  188  to control operation of the second sleep area  162  upon which the second occupant  156  is lying. In order to ensure proper linking between each remote control  186 ,  188  and the corresponding sleep area  160 ,  162 , each remote control  186 ,  188  can include an address or other unique identifier, for example to distinguish the first remote control  186  from the second remote control  188 . 
     In an example, the first occupant  154  can select, via the first remote control  186 , to control articulation of the first head section  164  upward or downward by a certain amount and/or to control articulation of the first leg section  166  upward or downward by a certain amount. The first remote control  186  can also be configured to control articulation of the joined middle section  184  (e.g., to control articulation of the joined middle sections  168 ,  174 ) if the sleep system  150  is configured so that the joined middle section  184  can be articulated. The second occupant  156  can select, via the second remote control  188 , to control articulation of the second head section  170  upward or downward by a certain amount and/or to control articulation of the second leg section  172  upward or downward by a certain amount. The first remote control  186  can also be configured to control articulation of the joined middle section  184  if the sleep system  150  is configured so that the joined middle section  184  can be articulated. In an example, articulation of the joined middle section  184  can be controlled by only the first remote control  186 , by only the second remote control  188 , or by both the first remote control  186  and the second remote control  188 . 
     In an example, articulation of any one of sections  164 ,  166 ,  170 ,  127  and (if it is articulable)  184  can be controlled to occur continuously or along a discrete set of positions between a minimum height or orientation and a maximum height or orientation. For example, the head sections  164 ,  170  and the leg sections  166 ,  172  can be articulable from a minimum height position (e.g., flat) to a maximum height position (e.g., with the head section  164 ,  170  at a maximum programmed angle with respect horizontal, such as about 60°, or with the leg section  166 ,  172  forming a maximum programmed angle with respect to horizontal, such as about 45°). 
     Like the sleep system  10  described above, the sleep system  150  can also be configured so that each sleep area  160 ,  162  can be positioned into one or more predetermined or preset positions. For each preset position, the head section  164 ,  170 , the leg section  166 ,  172 , and in some cases, the joined middle section  184 , can be moved to predetermined positions or orientations. Examples of preset positions that can each be programmed into the sleep system  10  include, but are not limited to: a flat preset (described above), a “reading” preset (described above), a “television” preset (described above), and a “snore” present. 
     In examples where the supporting structures of the mattress  158  comprise air chambers, the sleep system  150  can also comprise an inflation system configured to control the pressure within the air chambers. The inflation system can comprise one or more pumps configured to inflate or deflate the air chambers, and one or more controllers configured to control the one or more pumps. In an example, the one or more controllers that control articulation of the mattress  158  (e.g., the controller  200  or the controllers  214 A,  214 B) can also be configured to control operation of the one or more pumps. In another example, one or more separate controllers for controlling operation of the one or more inflation pumps can be provided that are separate from the one or more controllers for controlling articulation of the mattress  158 . 
     In an example, the inflation system can provide for individual control of the air pressure within each air chamber or within one or more sets of air chambers. For example, if a first set of one or more air chambers is located in the first sleep area  160  and a second set of one or more air chambers is located in the second sleep area  162 , then the inflation system can be configured to individually control the pressure in the first set of air chambers in order to control the firmness of one or more portions or the entirety of the first sleep area  160  and the inflation system can be configured to individually control the pressure in the second set of air chambers in order to control the firmness of one or more portions or the entirety of the second sleep area  162 . In an example, the user controlling devices  186 ,  188  can also be configured to control the inflation system, such as by communicating with the controllers of the inflation system to control the pump. Each user controlling device  186 ,  188  can be configured to control inflation of the air chambers associated with a corresponding one of the sleep areas  160 ,  162 , e.g., so that the first occupant  154  can control the firmness of the first sleep area  160  and the second occupant  156  can control the firmness of the second sleep area  162 . 
       FIG. 11  shows a top view of the sleep system  150 . As shown in  FIG. 11 , the sleep system  150  can include an articulation system  190  for controlling articulation of the articulable sections  164 ,  166 ,  170 ,  172 , and (if articulable)  184 . The articulation system  190  can include a set of articulating actuators, with each articulable section being articulated by one or more of the actuators. An example of an actuator that can be used for articulating the articulable sections  164 ,  166 ,  170 ,  172  can include one or more motors. For example, the articulation system  190  can include one or more head motors configured to move the head sections  164 ,  170 . For example, a first head motor  192  can be configured to articulate the first head section  164  of the first sleep area  160  and a second head motor  194  can be configured to articulate the second head section  170  of the second sleep area  162 . The articulation system  190  can also include one or more leg motors configured to articulate the leg sections  166 ,  172 . For example, as shown in  FIG. 11 , a first leg motor  196  can be configured to articulate the first leg section  166  of the first sleep area  160  and a second leg motor  198  can be configured to articulate the second leg section  172  of the second sleep area  162 . One or more middle motors (not shown) can also be included and can be configured to articulate the joined middle section  184 . 
     The articulation system  190  can also include one or more controllers, such as a control box that includes the electronics and hardware for providing instructions to the articulating motors  192 ,  194 ,  196 ,  198 .  FIG. 11  is a top view of the example sleep system  150 , showing the articulation system  190  including a single, common controller  200  that is configured to control each of the sleep areas  160 ,  162 , e.g., each of the articulating motors  192 ,  194 ,  196 ,  198 . Each remote control  186 ,  188  can be in communication with the controller  200 , such as via a wireless communication link  202 ,  204 . The remote controls  186 ,  188  can send movement control signals to the controller  200  via the wireless communication link  202 ,  204 . A “movement control signal,” as used herein, can refer to a signal or plurality of signals sent from a remote controls  186 ,  188  to the controller  200  corresponding to a particular movement or position of one or more of the articulable sections  164 ,  166 ,  168 ,  170 . A movement control signal can include one or more instructions for the direction of movement of a particular articulable section  164 ,  166 ,  168 ,  170 , e.g., the direction of movement of a corresponding articulating motor  192 ,  194 ,  196 ,  198 , a speed for the movement of a particular articulable section  164 ,  166 ,  168 ,  170  or of a particular articulating motors  192 ,  194 ,  196 ,  198 , or an overall position of the corresponding sleep area  160 ,  162  being controlled by the remote control  186 ,  188 , such as a preset position. 
     The controller  200  can send one or more motor control signals to one or more of the articulating motors  192 ,  194 ,  196 ,  198  corresponding to a desired motion of each articulating motors  192 ,  194 ,  196 ,  198 . A “motor control signal,” as used herein, can refer to a signal or plurality of signals sent from a controller, such as the controller  200 , to one or more articulating motors  192 ,  194 ,  196 ,  198  corresponding to a particular movement or position of one or more articulable sections  164 ,  166 ,  168 ,  170 . A motor control signal or signals can comprise an instruction for one or both of the direction that each articulating motor  192 ,  194 ,  196 ,  198  should articulate and the speed at which the articulating motor  192 ,  194 ,  196 ,  198  should travel. In an example, a plurality of communication cables  204 A,  204 B,  204 C, and  204 D (collectively referred to herein as “cable  204 ” or “cables  204 ”) can carry the motor control signals from the controller  200  to the articulating motors  192 ,  194 ,  196 ,  198 , with each cable  204  corresponding to a particular motor (such as a first cable  204 A for the first head motor  192 , a second cable  204 B for the second head motor  194 , a third cable  204 C for the first leg motor  196 , and a fourth cable  204 D for the second leg motor  198 ). 
     In another example, a sleep system  210  can include an articulating system  212  having more than a single common controller. In the example shown in  FIG. 12 , each sleep area  160 ,  162  can have its own controller, such as a first controller  214 A corresponding to the first sleep area  160 , e.g., by being configured to control the first head motor  192  and the first leg motor  196 , and a second controller  214 B corresponding to the second sleep area  162 , e.g., by being configured to control the second head motor  194  and the second leg motor  198 . In such an example, the first remote control  186  can be linked to the first controller  214 A via a first wireless communication link  216 A and the first controller  214 A can be configured to respond to commands sent from the first remote control  186  and not from the second remote control  188 . The second remote control  188  can be linked to the second controller  214 B via a second wireless communication link  216 B and the second controller  214 B can be configured to respond to commands sent from the second remote control  188  and not from the first remote control  186 . 
     If, for example, the first occupant  154  wishes to articulate his or her head and upper torso upward or downward, he or she can make a selection on the first remote control  186  that can instigate the transmission of a movement control signal from the first remote control  186  via the first wireless communication link  216 A to the first controller  214 A, which in turn can send a motor control signal to the first head motor  192 . Similarly, if the first occupant  154  wishes to articulate his or her feet, he or she can make a selection on the first remote control  186  that can instigate the transmission of a movement control signal via the first wireless communication link  216 A to the first controller  214 A, which in turn can send a motor control signal to the first leg motor  196 . If, for example, the second occupant  156  wishes to articulate his or her head and upper torso upward or downward, he or she can make a selection on the second remote control  188  that can instigate the transmission of a movement control signal from the second remote control  188  via the second wireless communication link  216 B to the second controller  214 B, which in turn can send a motor control signal to the second head motor  194 . Similarly, if the second occupant  156  wishes to articulate his or her feet, he or she can make a selection on the second remote control  188  that can instigate the transmission of a movement control signal via the second wireless communication link  216 B to the second controller  214 B, which in turn can send a motor control signal to the second leg motor  198 . 
     Each separate controller  214 A,  214 B (collectively referred to herein as “controller  214 ” or “controllers  214 ”) can include communication links, such as cables, to the articulating motors  192 ,  194 ,  196 ,  198  that are controlled by that particular controller  214 . For example, the first controller  214 A can be linked to the first head motor  192  via a first cable  218 A and to the first leg motor  196  via a second cable  218 B. Similarly, the second controller  214 B can be linked to the second head motor  194  via a first cable  220 A and to the second leg motor  198  via a second cable  220 B. The controllers  214 A and  214 B can be in communication with each other via a communication link, such as a cable  222  running between the controllers  214 A,  214 B to pass control signals between the controllers  214 A,  214 B. 
     Each set of one or more supporting structures can include any type of supporting structure that can be used for supporting an occupant  14 ,  16 ,  154 ,  156  that is using a sleep system  10 ,  70 ,  80 ,  150 ,  210  in accordance with the present description. Examples of supporting structures that can be used within a mattress  18 ,  158  can include innerspring supporting structures, foam (e.g., “memory” foam) supporting structures, and fluid-based supporting structures, such as air chambers or air bladders. Examples of air bladder or air chamber systems are described in U.S. Provisional Patent Application Ser. No. 61/728,094, entitled “Multi-Zone Air Chamber and Mattress System,” filed on Nov. 19, 2012, and U.S. patent application Ser. No. 13/828,985, entitled “Multi-Zone Fluid Chamber and Mattress System,” filed on Mar. 14, 2013, the disclosures of which are incorporated herein 
       FIG. 13  shows a schematic diagram of a controller  250 , which can represent, for example, the single controller  60  of the example sleep system  10  shown in  FIG. 4 , one of the plurality of controllers  74 A and  74 B of the example sleep system  70  shown in  FIG. 5 , one of the plurality of controllers  84 A and  84 B of the example sleep system  80  shown in  FIG. 6 , the single controller  200  of the example sleep system  150  shown in  FIG. 11 , or one of the plurality of controllers  214 A,  214 B of the example sleep system  210  shown in  FIG. 12 . 
     The controller  250  can include one or more communication modules to allow the controller  250  to communicate with the remote controls  42 ,  44 ,  186 , or  188 , the articulating motors  52 ,  54 ,  56 A,  56 B,  192 ,  194 ,  196 ,  198 , and another controller (if the controller  250  is part of a multi-controller sleep system). The communication modules can include a telemetry module  252  and a communication bus  254 . The telemetry module  252  can allow for the wireless transfer of data, such as control signals, to and from one or both of the remote controls  42 ,  44 ,  186 ,  188  by establishing the wireless communication link  62 ,  64 ,  202 ,  204  between the telemetry module  252  and a similar corresponding telemetry module within each remote control  42 ,  44 ,  186 ,  188 . The telemetry module  252  can include a radio frequency (RF) transceiver to permit bi-directional communication between the controller  250  and the remote controls  42 ,  44 ,  186 ,  188 . To support wireless communication, such as RF communication, the telemetry module  252  can include appropriate electrical components, such as one or more of amplifiers, filters, mixers, encoders, decoders, and the like. 
     The communication bus  254  can provide for a physical communication link to the controller  250 , such as via the one or more cables  256 A,  256 B,  256 C,  256 D (collectively “cable  256 ” or “cables  256 ”), which can correspond to the cables  66  from the controller  60  in  FIG. 4 , the cables  76 A,  76 B,  78 A,  78 B, and  79  from the controllers  74 A,  74 B in  FIG. 5 , the cables  86 A,  86 B,  88 A,  88 B, and  89  from the controllers  84 A,  84 B in  FIG. 6 , or the cables  218 A,  218 B,  220 A,  220 B from the controllers  214 A,  214 B in  FIG. 12 . The communication bus  254  can include one or more physical ports  258 A,  258 B,  258 C,  258 D (collectively “port  258 ” or “ports  258 ”), each configured to provide for connection to a corresponding cable  256 . 
     Each port  98  can be addressed to correspond to a particular communication link that is to be established. For example, in the case of the single controller  60  of  FIG. 4 , a first port  258 A can be addressed to correspond to a link to the first head motor  52 , a second port  258 B can be addressed to correspond to a link to the second head motor  54 , a third port  258 C can be addressed to correspond to a link to the first leg motor  56 A, and a fourth port  258 D can be addressed to correspond to a link to the second leg motor  56 B. In the example of separate controllers, such as the controllers  74 A,  74 B configured for separate control of the upper portion and the lower portion of the mattress  18 , respectively, a first port  258 A of a first one of the controllers, such as the first controller  74 A, can be addressed to correspond to a link to the other controller  74 B, a second port  258 B can be addressed to correspond to a link to the first head motor  52 , and a third port  258 C can be addressed to correspond to the second head motor  54 . For the second controller, such as the second controller  74 B, the first port  258 A can be addressed to correspond to the link to the other controller  74 A, the second port  258 B can be addressed to correspond to a link to the first leg motor  56 A, and the third port  258 C can be addressed to correspond to a link to the second leg motor  56 B. 
     In the example of the separate controllers  84 A,  84 B for each of the sleep areas  20 ,  22 , the first port  258 A of each controller can be addressed to correspond to a link to the other controller, the second port  258 B can be addressed to correspond to a link to a corresponding head motor (such as the first head motor  52  or the second head motor  54 ), and the third port  258 C can be addressed to correspond to a link to a corresponding leg motor (such as the first leg motor  56 A or the second leg motor  56 B). 
     The controller  250  can also include a processor  260 , a memory  262 , and a power source  264 . The processor  260  can control the overall operation of the controller  250 , such as by storing and retrieving information from the memory  262 , by controlling transmission of signals to and from the remote controls  42 ,  44 ,  186 ,  188  via the telemetry module  252 , and controlling transmission of signals to and from the articulating motors  52 ,  54 ,  56 A,  56 B,  192 ,  194 ,  196 ,  198 , or another controller via the communication bus  254 . The processor  260  can take the form of one or more microprocessors, one or more controllers, one or more digital signal processor (DSP), one or more application-specific integrated circuit (ASIC), one or more field-programmable gate array (FPGA), or other digital logic circuitry. 
     The memory  262  can store instructions for execution by the processor  260 , such as predetermined control instructions for the articulating motors  52 ,  54 ,  56 A,  56 B,  192 ,  194 ,  196 ,  198 . The memory  262  can also store information corresponding to the operation of the sleep system  10 ,  70 ,  80 ,  150 ,  210  such as storing addresses identifying each remote control  42 ,  44 ,  186 ,  188  or each articulating motor  52 ,  54 ,  56 A,  56 B,  192 ,  194 ,  196 ,  198 . The memory  262  can also store other information regarding the components of the sleep system  10 ,  70 ,  80 ,  150 ,  210  such as the present configuration of each articulable section  24 ,  30 ,  40 ,  164 ,  166 ,  170 ,  172 ,  184  or the present position of each articulating motor  52 ,  54 ,  56 A,  56 B,  192 ,  194 ,  196 ,  198 , or both. The memory  262  can also store preset positions of each articulable section  24 ,  30 ,  40 ,  164 ,  166 ,  170 ,  172 ,  184  or each articulating motor  52 ,  54 ,  56 A,  56 B,  192 ,  194 ,  196 ,  198 , or both, with each preset position corresponding to a particular preset position of the sleep areas  20 ,  22 ,  160 ,  162  (as described in more detail above). The memory  262  can include any electronic data storage media, such as any one or more of random access memory (RAM), read-only memory (ROM), electronically-erasable programmable ROM (EEPROM), flash memory, and the like. 
     Alternatively, or in conjunction with memory  262 , the sleep system  10 ,  70 ,  80 ,  150 ,  210  can include one or more positional sensors configured to determine a position or orientation of each of the articulable sections  24 ,  30 ,  40 ,  164 ,  166 ,  170 ,  172 ,  184  or each of the articulating motors  52 ,  54 ,  56 A,  56 B,  192 ,  194 ,  196 ,  198 , or both. The one or more positional sensors can transmit the position or orientation of each articulable section  24 ,  30 ,  40 ,  164 ,  166 ,  170 ,  172 ,  184  or each articulating motor  52 ,  54 ,  56 A,  56 B,  192 ,  194 ,  196 ,  198 , or both, to the controller  250 . Examples of positional sensors that can be used with the sleep systems of the present disclosure include, but are not limited to, accelerometers and gyroscope positional or orientation sensors. Alternatively, a sensor can be included on the motors  52 ,  54 ,  56 A,  56 B,  192 ,  194 ,  196 ,  198 , such as a motor encoder, to determine a position of the motor or an actuator moved by the motor. Other types of positional or orientation sensors can be used. 
     The power source  264  can comprise power circuitry that is connectable to an external power supply, such as a standard alternating current (AC) power supply. The power source  264  can also include a battery, such as a non-rechargeable primary cell battery or a rechargeable battery, which can be coupled to the power circuitry. 
     As described above, each sleep area  20 ,  22 ,  160 ,  162  can be controlled by a corresponding remote control  42 ,  44 ,  186 ,  188 , such as the first remote control  42 ,  186  controlling the first sleep area  20 ,  160  and the second remote control  44 ,  188  controlling the second sleep area  22 ,  162 . As further described above, the sleep system  10 ,  70 ,  80 ,  150 ,  210  can be configured so that the first remote control  42 ,  186  is linked to the first sleep area  20 ,  160 , e.g., so that when the first occupant  14 ,  154  selects a movement command on the first remote control  42 , 186 , the articulation system  50 ,  72 ,  190  correctly articulates the first sleep area  20 ,  160  occupied by the first occupant  14 ,  154  rather than the second sleep area  22 ,  162  occupied by the second occupant  16 ,  156 . Similarly, the sleep system  10 ,  70 ,  80 ,  150 ,  210  can be configured so that the second remote control  44 , 188  is linked to the second sleep area  22 ,  162 . 
     In order to ensure proper linking between each remote control  42 ,  44 ,  186 ,  188  and the corresponding sleep area  20 ,  22 ,  160 ,  162 , each remote control  42 ,  44 ,  186 ,  188  can have an address or other unique identifier. The address can allow the controller  250  (e.g., the controller  60 , the controllers  74 A,  74 B, the controllers  84 A,  84 B, the controller  200 , or the controllers  214 A,  214 B) to identify which remote control  42 ,  44 ,  186 ,  188  is sending a movement control signal. For example, when the first remote control  42 ,  186  sends a movement control signal to the controller  250 , the movement control signal can include a header that includes the address for the first remote control  42 , 186 . Upon receiving the movement control signal, the controller  250  can read the header including the address and determine that the movement control signal came from the first remote controller  42 ,  186 . The controller  250  can then determine that the movement control signal should correspond to the first sleep area  20 ,  160 , and the controller  250  can relay a corresponding motor control signal or signals to the appropriate motors  52 ,  56 A,  56 B,  192 ,  196  to articulate the first sleep area  20 ,  160 . Similarly, when the second remote control  44 ,  188  sends a movement control signal to the controller  250 , the movement control signal can include a header with the address for the second remote control  44 ,  188 . The controller  250  can then send a corresponding control signal to the appropriate motors  54 ,  56 A,  56 B,  194 ,  198  to articulate the second sleep area  22 ,  162 . 
     Each remote control  42 ,  44 ,  186 ,  188  can be configured to allow an occupant  14 ,  16 ,  154 ,  156  operating remote control  42 ,  44 ,  186 ,  188  to select a specific, desired movement of the sleep system  10 ,  70 ,  80 ,  150 ,  210 . Selection of the desired movement by the occupant  14 ,  16 ,  154 ,  156  can, in turn, trigger a corresponding movement control signal to be sent from the remote control  42 ,  44 ,  186 ,  188  to the controller  250 . Examples of movements that can be selected by an occupant  14 ,  16 ,  154 ,  156  on each remote control  42 ,  44 ,  186 ,  188  can include, but are not limited to, at least one of the following commands: raise a first section,e.g., a command to raise a head section  24 ,  30 ; lower a first section, e.g., a command to lower a head section  24 ,  30 ,  164 ,  170 ; raise a second section, e.g., a command to raise the joined lower section  40  or to raise a leg section  166 ,  172 ; lower a second section, e.g., a command to lower the joined lower section  40  or to lower a leg section  166 ,  172 ; or move one or both of the first section and the second section into a preset position, such as a flat position, a reading position, a “watch TV” position, and so forth. 
     Each command can be activated by activating a particular button, series of buttons, or series of menu selections, on the remote control  42 ,  44 ,  186 ,  188 . Each button or menu selection can be a physical button or can be a virtual button, such as a button on a touch screen, or a series of button presses or menu prompts that are entered through physical or virtual buttons. 
     As noted above, each remote control  42 ,  44 ,  186 ,  188  can be configured to control the articulation of the articulable sections  24 ,  30 ,  40 ,  164 ,  166 ,  170 ,  172 ,  184  of a corresponding sleep area  20 ,  22 ,  160 ,  162 . In other words, each occupant  14 ,  16 ,  154 ,  156  can control the articulation of his or her own sleep area  20 ,  22 ,  160 ,  162 . In the case of the example sleep systems  10 ,  70 , and  80  of  FIGS. 1-6  (e.g., with a joined section spanning both sleep areas  20 ,  22 , such as the joined lower section  40 ), each occupant  14 ,  16 ,  154 ,  156  can also control the joined section that spans both sleep area  20 ,  22 , e.g., controlling the joined lower section  40 . Alternatively, only one of the remote controls  42 ,  44  could be configured to control the joined section, e.g., the joined lower section  40 , while the other remote control  42 ,  44  can be configured to only control a corresponding head section  24 ,  30 . 
     The split-section sleep systems  10 ,  70 ,  80 ,  150 ,  210  described above can result in additional challenges for providing an optimized sleep environment for the occupants  14 ,  16 ,  154 ,  156 . For example, adjacent movable sections of the sleep system  10 ,  70 ,  80 ,  150 ,  210 , such as the adjacent articulable head sections  24 ,  30 ,  164 ,  170 , as in sleep systems  10 ,  70 ,  80 ,  150 ,  210 , or the adjacent articulable leg sections  168 ,  172 , as in sleep systems  150 ,  210 , can result in difficulties for a bed sheet that is configured to fit over the mattress  18 ,  158  of the sleep system  10 ,  70 ,  80 ,  150 ,  210 . For example, if the adjacent sections are in close proximity to one another, adjacent portions of the sheet can be in contact, which can result in premature wear of the contacted portions. The friction of the adjacent portions of the sheet can also cause the sheet to move relative to the mattress  18 ,  158  and become bunched or even partially separated from the mattress  18 ,  158 . 
     The sheet also can be subjected to additional stress at a joint where two adjacent articulable sections join together, such as at the joint  37  at the end of the medial split  36  between the first head section  24  and the second head section  30  ( FIG. 1 ), the joint  177  at the end of the medial split  176  between the first head section  164  and the second head section  170  ( FIG. 8 ), or the joint  181  at the end of the medial split  180  between the first leg section  166  and the second leg section  172  ( FIG. 8 ). The movement of the adjacent articulable section  24  and  30 ,  164  and  170 , and  166  and  172  can cause pulling on the material of the sheet which can be further exacerbated by the occupants  14 ,  16 ,  154 ,  156  sitting or lying on the bed. 
       FIGS. 14-16  show an example of a sheet  300  that can be used with a split-top mattress, such as the split head mattress  18  shown in  FIG. 1  or the split head and split foot mattress  158  shown in  FIG. 8 . The sheet  300  is shown as being designed for a split-head and split-foot mattress  302 , similar to the mattress  158  described above with respect to the sleep system  150 ,  210  of  FIGS. 8-12 . However, a similar sheet design could be used for a split-head only mattress similar to the mattress  18  described above with respect to the sleep system  10 ,  70 ,  80  of  FIGS. 1-7 . 
       FIG. 14  shows an exploded view of the sheet  300  and the mattress  302 , e.g., with the sheet  300  and the mattress  302  being separated, e.g., before the sheet  300  has been placed onto the mattress  302 , to better show separate aspects of the sheet  300  and the mattress  302 . The sheet  300  can be configured to substantially cover the top surface and sides surfaces of the mattress  302 . The mattress  302  can have a first articulable upper section  304  (referred to herein as a first head section  304 ), a separate second articulable upper section  306  (referred to herein as a second head section  306 ), a first articulable lower section  308  (referred to herein as a first leg section  308 ), a separate second articulable lower section  310  (referred to herein as a second leg section  310 ), and a joined middle section  312 . As shown in  FIG. 14 , the first head section  304  and the second head section  306  can be pivotally coupled to the joined middle section  312 , e.g., so that the first head section  304  can be pivoted up and down relative to the middle section  312  adjacent to where the second head section  306  can also be pivoted up and down relative to the middle section  312 . Similarly, the first leg section  308  and the second leg section  310  can be pivotally coupled to the joined middle section  312 , e.g., so that the first leg section  308  can be pivoted up and down relative to the middle section  312  adjacent to where the second leg section  310  can also be pivoted up and down relative to the middle section  312 . In this way, the example mattress  302  shown in  FIG. 14  is substantially the same as the split-head and split-leg mattress  158  of the sleep system  150  of  FIG. 8 . However, the mattress  302  can have other configurations, such as the split head and joined leg mattress  18  of the sleep system  10  of  FIG. 1 . 
     The mattress  302  can include a top surface  314  that is configured to support occupants of the mattress  302 , a bottom surface  316 , and one or more side surfaces  318  that extending between the top surface  314  and the bottom surface  316 . The top surface  314 , bottom surface  316 , and the side surfaces  318  can be shaped and configured so that the mattress  302  forms the articulable sections of the adjustable bed, for example the first head section  304 , the second head section  306 , the first leg section  308 , the second leg section  310 , and the joined middle section  312 . 
     The sheet  300  can have a shape that corresponds to the mattress  302  for which the sheet  300  is configured to cover. For example, the sheet  300  that is configured to cover the example mattress  302  shown in  FIG. 14  has a first upper section  320  that corresponds to the first head section  304  of the mattress  302 , a separate second upper section  322  that corresponds to the second head section  306  of the mattress  302 , a first lower section  324  that corresponds to the first leg section  308  of the mattress  302 , a separate second lower section  326  that corresponds to the second leg section  310  of the mattress  302 , and a joined middle section  328  that corresponds to the joined middle section  312  of the mattress  302 . The sheet  300  can be configured so that each section  320 ,  322 ,  324 ,  326 ,  328  can be dimensioned to fit snuggly over each corresponding section  304 ,  306 ,  208 ,  310 ,  312  of the mattress  302 . 
     The sheet  300  can be formed from a top member  330 , e.g., a top fabric sheet  330 , that is configured to cover the top surface  314  of the mattress  302  and one or more side members  332 , e.g., one or more side fabric sheets  332 , that are coupled to the top member  330  and are configured to cover the one or more side surfaces  318  of the mattress  302 . The one or more side fabric sheets  332  can also include a bottom portion  334  that is configured to wrap around at least a portion of the bottom surface  316  of the mattress  302 , such as with elastic to form a snug fit of the bottom portion  334  onto the bottom surface  316  of the mattress  302 . 
     The sheet  300  can also include one or more features that can provide for better durability of the sheet  300  on an adjustable split-top mattress  302 , and/or can provide for a better fit of the sheet  300  onto the mattress  302 , and/or can provide for better performance of the sheet  300  during articulation of the mattress  302 . 
     For example, the motion of the mattress  302  during articulation can result in increased stress on the sheet  300 , such as when a first movable section of the mattress  302  is articulated while an adjacent second movable section of the mattress  302  does not move with the first movable section, e.g., by moving to a different position or by remaining stationary. For example, if the first head section  304  remains lowered while the second head section  306  is raised, as shown in  FIG. 14 , the second upper section  322  of the sheet  300  can become stretched relative to the first upper section  320 , and in particular can put added stress on a junction  336  between the first upper section  320 , the second upper section  322 , and the joined middle section  328  of the sheet  300 . The junction  336  can be a point on the sheet  300  where several pieces of fabric and several seams come together, which can result in the sheet  300  being structurally weaker at the junction  336  than at other positions of the sheet  300 . The junction  336  can also being a point where stress from the motion of the articulable sections  304 ,  306 ,  208 ,  310  of the mattress  302  can be larger. The combination of the structural weakness of the sheet  300  at the junction  336  and the increased stress exerted on the sheet  300  at the junction  336  can mean that the sheet can be particularly susceptible to damage (e.g., tearing, fraying, etc.) at the junction  336 . 
       FIG. 15  shows a close up view of the junction  336  for the example sheet  300 . The sheet  300  can be configured to reduce the stress experienced by the sheet  300  at the junction due to the motion of articulable sections  304 , 306 ,  308 ,  310  of the mattress  302 . In an example, the sheet  300  can include one or more structures that are configured to distribute the stress on the sheet  300  so that it is not concentrated at any one point, particularly at the junction  336 . The sheet  300  can include what is referred to herein as a “crossover joint.” A crossover joint can comprise a first member projecting laterally from a first one of adjacent articulable sections of the sheet  300  toward the other articulable section of the sheet  300 , and a second member projecting laterally from a second one of the adjacent articulable sections of the sheet  300  toward the other articulable section of the sheet  300 . The first member can overlays, or cross over the second member along a predetermined length of the adjacent articulable sections extending from the junction of the sheet  300 . 
     For example, at the junction  336  between the first upper section  320 , the second upper section  322 , and the joined middle section  328 , a first crossover joint  338  can be formed comprising a first member  340  projecting laterally from the first upper section  320  and overlapping a second member  342  projecting laterally from the second upper section  322  (best seen in  FIG. 15 ). As seen in  FIG. 15 , the members  340 ,  342  can each comprise a relatively thin strip of fabric, e.g., with a width Ws of from about 0.5 centimeter (about 0.2 inches) to about 7.5 cm (about 3 inches). The first member  340  and the second member  342  can each extend along a longitudinal length of the sections  320 ,  322  from which they project (e.g., left to right in  FIG. 15 ) up to, and in some case, including the junction  336  between the sections  320 ,  322 ,  328 . 
     The members  340 ,  342  can provide for distribution of the stress exerted on the sheet  300  when articulable sections  304 ,  306  of the mattress  302  are moved. For example, if the first head section  304  is moved upward relative to the second head section  306 , such that the first upper section  320  of the sheet is also moved upward relative to the second upper section  322 , then the first member  340  projecting from the first upper section  320  of the sheet  300  can be deflected downward and the second member  342  projecting from the second upper section  322  can be deflected upward. Similarly, if the second head section  306  is moved upward relative to the first head section  304  such that the second upper section  322  of the sheet  300  is moved upward relative to the first uppers section  320 , then the second member  342  can be deflected upward and the first member  342  can be deflected downward. 
     The deflected members  340 ,  342  can be tensioned by the motion of the articulated first head section  304  so that stress exerted on the sheet  300  by the articulated first head section  304  can be distributed across the members  340 ,  342  rather than being concentrated at the junction  336 . The overlapping material of the first member  340  crossing over the second member  342  at the junction  336  can also act to reinforce the sheet  300  at the junction  336  by placing two pieces of fabric at the junction  336  rather than just one. Also, any stitching that can be applied to secure the members  340 ,  342  together and to the rest of the sheet  300  can provide additional structural support to the sheet  300  at the junction  336 . 
     Because of the close proximity of the adjacent articulable sections  304 ,  306  of the mattress  302 , a sheet on the mattress  302  can become bunched together or can ride up on the mattress  302 , e.g., because the motion of the articulable sections  304 ,  306  relative to each other can cause the sheet to be moved up the mattress  302 . In an example, the sheet  300  can include one or more features to prevent or mitigate bunching or riding up of the sheet  300  during articulation of the articulable sections  304 ,  306  of the mattress  302 . 
     In an example, the sheet  300  can include friction-reducing panels  350 A,  350 B (referred to collectively herein as “friction-reducing panels  350 ” or “friction-reducing panel  350 ”) at positions where one portion of the sheet  300  will be in contact with and sliding along another portion of the sheet  300 , such as on adjacent and opposing side surfaces  318  of the mattress  302 . For example, as shown in  FIG. 14 , the mattress  302  can include adjacent interior side surfaces  318 A and  318 B on lateral interior sides of the first articulable section  304  and the second articulable section  306 , respectively. The sheet  300  can include corresponding friction-reducing panels  350 A and  350 B that are configured to cover the interior side surfaces  318 A and  318 B, respectively. The friction-reducing panels  350 A,  350 B can comprise one or more friction-reducing materials so that the friction-reducing panels  350 A,  350 B can slide freely or relatively freely over one another when the articulable sections  304 ,  306  are moved relative to each other. Examples of materials that can be used to some or a portion of the friction-reducing panels  350 A,  350 B include, but is not limited to, Lycra spandex fiber (e.g., a polyurethane-polyrea copolymer) and polytetrafluoroethylene (PTFE) fiber. The friction-reducing panels  350 A,  350 B can be made from the same material, wherein the material has a sufficiently low coefficient of friction with respect to itself, or the friction-reducing panels  350 A,  350 B can be made from different materials, where the coefficient of friction of the material of the first friction-reducing panel  350 A on the material of the second friction-reducing panel  350 B is sufficiently low. 
     The friction-reducing panels  350 A,  350 B can provide for a coefficient of friction between the panels  350 A, 350 B that is sufficiently low so as to avoid deformation of the sheet  300  or to prevent or reduce the sheet  300  being pushed off the mattress  302  when adjacent articulable sections  304  and  306  or  308  and  310  are moved relative to one another. 
     To better illustrate the present sleep system of the present disclosure, a non-limiting list of Examples is provided here: 
     EXAMPLE 1 can include subject matter (such as an apparatus, a device, a method, or one or more means for performing acts), such as can include a sleep system. The subject matter can comprise a mattress including a first sleep area for a first occupant, the first sleep area comprising a first movable upper section and a first movable lower section, and a second sleep area for a second occupant, the second sleep area comprising a second movable upper section adjacent to the first movable upper section and a second movable lower section adjacent to the first lower section. The first movable upper section is separate from and movable with respect to the second movable upper section. The first movable lower section and the second movable lower section are coupled together and move together. The sleep system can further include an articulation system for articulating the first movable upper section, the first movable lower section, the second movable upper section, and the second movable lower section, wherein the articulation system is configured to allow for independent movement of the first upper movable section and the second upper movable section and for substantially synchronized movement of the first lower movable section and the second lower movable section. 
     EXAMPLE 2 can include, or can optionally be combined with the subject matter of EXAMPLE 1, to optionally include the articulation system comprising a first actuator for articulating the first movable upper section, a second actuator for articulating the second movable upper section, one or more third actuators for articulating the first movable lower section and the second movable lower section, and one or more controllers for controlling movement of the first actuator, the second actuator, and the one or more third actuators. 
     EXAMPLE 3 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1 and 2, to optionally include the articulation system comprising a first actuator configured to articulate the first movable lower section, a second actuator configured to articulate the second movable lower section, and a controller configured to send one or more first motion control signals to the first actuator and one or more second motion control signals to the second actuator, wherein the first actuator control signals and the second actuator control signals are configured so that the first actuator and the second actuator operate in a substantially synchronized manner. 
     EXAMPLE 4 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-3, to optionally include a first user controlling device configured to communicate with the articulation system in order to control articulation of the first movable upper section. 
     EXAMPLE 5 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-4, to optionally include a second user controlling device configured to communicate with the articulation system in order to control articulation of the second movable upper section. 
     EXAMPLE 6 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-5, to optionally include the first user controlling device being configured to control articulation of the substantially synchronized movement of the first movable lower section and the second movable lower section. 
     EXAMPLE 7 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-6, to optionally include the second user controlling device being configured to control articulation of the substantially synchronized movement of the first movable lower section and the second movable lower section. 
     EXAMPLE 8 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-7, to optionally include one or more first supporting structures within the first sleep area for providing support to the first occupant. 
     EXAMPLE 9 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-8, to optionally include a first portion of the one or more first supporting structures being contained in the first movable upper section. 
     EXAMPLE 10 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-9, to optionally include a second portion of the one or more first supporting structures being contained in the first movable lower section. 
     EXAMPLE 11 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-10, to optionally include one or more second supporting structures within the second sleep area for providing support to the second occupant. 
     EXAMPLE 12 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-11, to optionally include a first portion of the one or more second supporting structures being contained in the second movable upper section. 
     EXAMPLE 13 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-12, to optionally include a second portion of the one or more second supporting structures being contained in the second movable lower section. 
     EXAMPLE 14 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-13, to optionally include the one or more first supporting structures comprising one or more air chambers. 
     EXAMPLE 15 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-14, to optionally include the one or more first supporting structures comprising a plurality of innersprings. 
     EXAMPLE 16 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-15, to optionally include the one or more first supporting structures comprising one or more foam structures. 
     EXAMPLE 17 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-16, to optionally include the one or more second supporting structures comprising one or more air chambers. 
     EXAMPLE 18 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-17, to optionally include the one or more second supporting structures comprising a plurality of innersprings. 
     EXAMPLE 19 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-18, to optionally include the one or more second supporting structures comprising one or more foam structures. 
     EXAMPLE 20 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-19, to include subject matter (such as an apparatus, a device, a method, or one or more means for performing acts), such as can include a sleep system. The subject matter can comprise a mattress including a movable first section extending laterally along a first portion of a width of the mattress and extending longitudinally along a first portion of a length of the mattress, a movable second section extending laterally along a second portion of the width of the mattress and extending longitudinally along the first portion of the length of the mattress, and a movable third section extending laterally across substantially the entire width of the mattress and extending longitudinally along a second portion of the length of the mattress. The sleep system can also include an articulation system configured to independently articulate the first section, the second section, and the third section. 
     EXAMPLE 21 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-20, to optionally include the articulation system comprising a first actuator for articulating the movable first section, a second actuator for articulating the movable second section, one or more third actuators for articulating the movable third section, and one or more controllers for controlling movement of the first actuator, the second actuator, and the one or more third actuators. 
     EXAMPLE 22 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-21, to optionally include the articulation system comprising a first actuator positioned on a first lateral side of the mattress, a second actuator positioned on a second lateral side of the mattress, wherein the first actuator and the second actuator cooperate to articulate the movable third section, and a controller configured to send one or more first motion control signals to the first actuator and one or more second motion control signals to the second actuator, wherein the first actuator control signals and the second actuator control signals are configured so that the first actuator and the second actuator operate in a substantially synchronized manner. 
     EXAMPLE 23 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-2, to optionally include a first user controlling device configured to communicate with the articulation system in order to control articulation of the movable first section. 
     EXAMPLE 24 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-23, to optionally include the first user controlling device being configured to control articulation of the movable third section. 
     EXAMPLE 25 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-24, to optionally include a second user controlling device configured to communicate with the articulation system in order to control articulation of the movable second section. 
     EXAMPLE 26 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-25, to optionally include the second user controlling device being configured to control articulation of the movable third section 
     EXAMPLE 27 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-26, to optionally include one or more first supporting structures contained within the movable first section and a first portion of the movable third section. 
     EXAMPLE 28 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-27, to optionally include one or more second supporting structures within the movable second section and a second portion of the movable third section. 
     EXAMPLE 29 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-28, to optionally include the one or more first supporting structures comprising one or more air chambers. 
     EXAMPLE 30 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-29, to optionally include the one or more first supporting structures comprising a plurality of innersprings. 
     EXAMPLE 31 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-30, to optionally include the one or more first supporting structures comprising one or more foam structures. 
     EXAMPLE 32 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-31, to optionally include the one or more second supporting structures comprising one or more air chambers. 
     EXAMPLE 33 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-32, to optionally include the one or more second supporting structures comprising a plurality of innersprings. 
     EXAMPLE 34 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-33, to optionally include the one or more second supporting structures comprising one or more foam structures. 
     EXAMPLE 35 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-34, to optionally include a fourth section extending laterally across the entire width of the mattress and extending longitudinally along a third portion of the length of the mattress, wherein the third portion of the length is longitudinally between the first portion of the length and the second portion of the length. 
     EXAMPLE 36 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-35, to include subject matter (such as an apparatus, a device, a method, or one or more means for performing acts), such as can include a sleep system. The subject matter can include a support frame and a mattress configured to be positioned on the support frame. The mattress can include a movable first head section extending along a first portion of a length of the mattress, a movable second head section laterally adjacent to the movable first section and extending longitudinally along the first portion of the length of the mattress, and a movable leg section extending longitudinally along a second portion of the length of the mattress. A first sleep area for a first occupant can comprise the movable first head section and a first portion of the movable leg section. A second sleep area for a second occupant can comprise the movable second head section and a second portion of the movable leg section. The sleep system can also comprise an articulation system including a first head actuator for articulating the movable first head section, a second head actuator for articulating the movable second head section, at least one leg actuator for articulating the movable leg section, and at least one controller for controlling the first head actuator, the second head actuator, and the at least one leg actuator. The sleep system can further include a first user controlling device configured to communicate with the at least one controller via a first communication link in order to control articulation of the movable first head section and to control articulation of the movable leg section, and a second user controlling device configured to communicate with the at least one controller via a second communication link in order to control articulation of the movable second head section and to control articulation of the movable leg section. 
     EXAMPLE 37 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-36, to include subject matter (such as an apparatus, a device, a method, or one or more means for performing acts), such as can include a method for controlling an articulating bed. The subject matter can include:
         sending a first movement control signal from a first user controlling device to one or more controllers, wherein the first movement control signal comprises one or more commands to move a movable first section of a mattress to a selected one of a plurality of positions, wherein the movable first section laterally extends across a first portion of a width of the mattress and longitudinally extends along a first portion of a length of the mattress;   sending a first actuator control signal, triggered by the first movement control signal, from the one or more controllers to a first articulating actuator;   moving the first movable section to the selected one of the plurality of positions of the first movable section according to the first actuator control signal with the first articulating actuator;   sending a second movement control signal from a second user controlling device to the one or more controllers, wherein the second movement control signal comprises one or more commands to move a second movable section of the mattress to a selected one of a plurality of positions of the second movable section, wherein the second movable section is laterally adjacent to the first movable section and laterally extends across a second portion of the width of the mattress and longitudinally extends along the first portion of the length of the mattress;   sending a second actuator control signal, triggered by the second movement control signal, from the one or more controllers to a second articulating actuator;   moving the second movable section to the selected one of the plurality of positions of the second movable section according to the second actuator control signal with the second articulating actuator;   sending a third movement control signal from one of the first user controlling device and the second user controlling device to the one or more controllers, wherein the third movement control signal comprises one or more commands to move a third movable section of the mattress to a selected one of a plurality of positions, wherein the third movable section longitudinally extends along a second portion of the length of the mattress;   sending a third actuator control signal, triggered by the third movement control signal, from the one or more controllers to a third articulating actuator configured to exert force at a first position of the movable third section;   sending a fourth actuator control signal, triggered by the third movement control signal, from the one or more controllers to a fourth articulating actuator configured to exert force at a second position of the movable third section; and   moving the third movable section to the selected one of the plurality of positions, wherein the third actuator control signal and the fourth actuator control signal are configured so that movement of the third articulating actuator and movement of the fourth articulating actuator are substantially synchronized so that movement of the third movable section is substantially uniform across the width of the mattress.       

     EXAMPLE 38 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-37, to include subject matter (such as an apparatus, a device, a method, or one or more means for performing acts), such as can include a sleep system comprising an air pasteurizing module having an outer module case, the case comprising a first case section extending medially along a length of the outer module case to define a movable first posturing section, a second case section adjacent to the first case section and extending along a length of the outer module case to define a movable second posturing section, a third case section defining a third posturing section, a fourth case section extending medially along a length of the outer module case to define a movable third posturing section, a fifth case section extending medially along a length of the outer module case to define a movable fourth posturing section, one or more first air chambers carried in the first, third and fourth case sections to provide a first posturing sleep area, and one or more second air chambers carried in the second, third, and fifth module sections to provide a second posturing sleep area. 
     EXAMPLE 39 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-38, to optionally include a medial split between the movable first posturing section and the movable second posturing section. 
     EXAMPLE 40 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-39, to optionally include a second medial split between the movable third posturing section and the movable fourth posturing section. 
     EXAMPLE 41 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-40, to optionally include an inflation system configured to control the pressure within the one or more first air chambers. 
     EXAMPLE 42 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-41, to optionally include an inflation system configured to control the pressure within the one or more second air chambers. 
     EXAMPLE 43 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-42, to optionally include an articulation system configured to articulate the movable first posturing section, the movable second posturing section, the movable third posturing section and the movable fourth posturing section. 
     EXAMPLE 44 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-43, to optionally include the articulation system comprising one or more actuators configured to articulate one or more of the movable first posturing section, the movable second posturing section, the movable third posturing section, and the movable fourth posturing section. 
     EXAMPLE 45 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-33, to optionally include the articulation system comprising one or more controllers configured to control movement of the one or more actuators. 
     EXAMPLE 46 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-45, to optionally include the one or more actuators comprising an actuator for articulating the movable first posturing section. 
     EXAMPLE 47 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-46, to optionally include the one or more actuators comprising an actuator for articulating the movable second posturing section. 
     EXAMPLE 48 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-47, to optionally include the one or more actuators comprising an actuator for articulating the movable third posturing section. 
     EXAMPLE 49 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-48, to optionally include the one or more actuators comprising an actuator for articulating the movable fourth posturing section. 
     EXAMPLE 50 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-49, to optionally include a user controlling device configured to communicate with the articulation system in order to control articulation of the movable first posturing section and the movable third posturing section. 
     EXAMPLE 51 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-50, to optionally include a user controlling device configured to communicate with the articulation system in order to control articulation of the movable second posturing section and the movable fourth posturing section. 
     EXAMPLE 52 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-51, to optionally include the one or more controllers comprising a controller configured to control articulation of the movable first posturing section and the movable second posturing section. 
     EXAMPLE 53 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-52, to optionally include the one or more controllers comprising a controller configured to control articulation of the movable third posturing section and the movable fourth posturing section. 
     EXAMPLE 54 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-53, to optionally include the one or more controllers comprising a first controller configured to control articulation of the movable first posturing section and the movable second posturing section, and a second controller configured to control articulation of the movable third posturing section and the movable fourth posturing section. 
     EXAMPLE 55 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-54, to optionally include the one or more controllers comprising a controller configured to control articulation of the movable first posturing section and the movable third posturing section. 
     EXAMPLE 56 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-55, to optionally include the one or more controllers comprising a controller configured to control articulation of the movable second posturing section and the movable fourth posturing section. 
     EXAMPLE 57 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-56, to optionally include the one or more controllers comprising a first controller configured to control articulation of the movable first posturing section and the movable third posturing section, and a second controller configured to control articulation of the movable second posturing section and the movable fourth posturing section. 
     EXAMPLE 58 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-57, to optionally include an inflation system configured to control the pressure within the one or more first air chambers and the one or more second air chambers. 
     EXAMPLE 59 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-58, to optionally include the inflation system comprising one or more pumps. 
     EXAMPLE 60 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-59, to optionally include the one or more controllers of the articulation system being configured to control the one or more pumps of the inflation system. 
     EXAMPLE 61 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-60, to include subject matter (such as an apparatus, a device, a method, or one or more means for performing acts), such as can include a sleep system. The subject matter can include a mattress comprising a first sleep area for a first occupant, the first sleep area comprising a first movable upper section and a first movable lower section. The mattress can also include a second sleep area for a second occupant, the second sleep area comprising a second movable upper section adjacent to the first movable upper section and a second movable lower section adjacent to the first lower section. The mattress can further include a common middle section extending between the first sleep area and the second sleep area, the common middle section being positioned between the movable upper section and the movable lower section of each of the first sleep area and the second sleep area. The mattress can include one or more first air chambers carried by the first movable upper section, the first movable lower section, and a first portion of the common middle section. The mattress can also include one or more second air chambers carried by the second movable upper section, the second movable lower section and a second portion of the common middle section. The sleep system can also include an articulation system for articulating the first movable upper section, the first movable lower section, the second movable upper section, and the second movable lower section. 
     EXAMPLE 62 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-61, to optionally include the mattress further comprising a medial split between the first movable upper section and the second movable upper section. 
     EXAMPLE 63 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-62, to optionally include the mattress further comprising a medial split between the first movable lower section and the second movable lower section. 
     EXAMPLE 64 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-63, to optionally include an inflation system configured to control the pressure within the one or more first air chambers. 
     EXAMPLE 65 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-64, to optionally include an inflation system configured to control the pressure within the one or more second air chambers. 
     EXAMPLE 66 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-65, to optionally include an inflation system configured to control the pressure within the one or more first air chambers and the one or more second air chambers. 
     EXAMPLE 67 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-66, to optionally include the articulation system comprising one or more actuators configured to articulate one or more of the first movable upper section, the second movable upper section, the first movable lower section, and the second movable lower section. 
     EXAMPLE 68 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-67, to optionally include one or more controllers configured to control movement of the one or more actuators. 
     EXAMPLE 69 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-68, to optionally include the one or more actuators comprising a first actuator for articulating the first movable upper section, a second actuator for articulating the second movable upper section, a third actuator for articulating the first movable lower section, and a fourth actuator for articulating the second movable lower section. 
     EXAMPLE 70 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-69, to optionally include the one or more controllers comprising a controller configured to control articulation of the first movable upper section and the second movable upper section. 
     EXAMPLE 71 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-70, to optionally include the one or more controller comprising a controller configured to control articulation of the first movable lower section and the second movable lower section. 
     EXAMPLE 72 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-71, to optionally include the one or more controllers comprising a first controller configured to control articulation of the first movable upper section and the second movable upper section and a second controller configured to control articulation of the first movable lower section and the second movable lower section. 
     EXAMPLE 73 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-72, to optionally include the one or more controllers comprising a controller configured to control articulation of the first movable upper section and the first movable lower section. 
     EXAMPLE 74 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-73, to optionally include the one or more controllers comprising a controller configured to control articulation of the second movable upper section and the second movable lower section. 
     EXAMPLE 75 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-74, to optionally include the one or more controllers comprising a first controller configured to control articulation of the first movable upper section and the first movable lower section and a second controller configured to control articulation of the second movable upper section and the second movable lower section. 
     EXAMPLE 76 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-75, to optionally include an inflation system configured to control the pressure within the one or more first air chambers. 
     EXAMPLE 77 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-76, to optionally include an inflation system configured to control the pressure within the one or more second air chambers. 
     EXAMPLE 78 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-77, to optionally include an inflation system configured to control the pressure within the one or more first air chambers and the one or more second air chambers. 
     EXAMPLE 79 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-78, to optionally include the inflation system comprising one or more pumps. 
     EXAMPLE 80 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-79, to optionally include the one or more controllers of the articulation system being configured to control the one or more pumps of the inflation system. 
     EXAMPLE 81 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-80, to optionally include a user controlling device configured to communicate with the articulation system in order to control articulation of the first movable upper section and the first movable lower section. 
     EXAMPLE 82 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-81, to optionally include a user controlling device configured to communicate with the articulation system in order to control articulation of the second movable upper section and the second movable lower section. 
     EXAMPLE 83 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-82, to optionally include a first user controlling device configured to communicate with the articulation system in order to control articulation of first movable upper section and the first movable lower section and a second user controlling device configured to communicate with the articulation system in order to control articulation of the second movable upper section and the second movable lower section. 
     EXAMPLE 84 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-86, to include subject matter (such as an apparatus, a device, a method, or one or more means for performing acts), such as can include a sheet for covering at least a portion of a mattress that includes a movable first section and a movable second section that is laterally adjacent to and proximate to the movable first section. The subject matter can include a first sheet section configured to cover at least a portion of the movable first section of the mattress, a second sheet section laterally adjacent to the first sheet section, the second sheet section configured to cover at least a portion of the movable second section of the mattress, wherein the first sheet section and the second sheet section are joined together at a sheet junction. The sheet can further include a first member projecting laterally from the first sheet section toward the second sheet section, the first member extending up to the sheet junction and a second member projecting laterally from the second sheet section toward the first sheet section, the second member extending up to the sheet junction. At least a portion of the first member can overlay at least a portion of the second member proximate to the sheet junction. 
     EXAMPLE 85 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-84, to optionally include the mattress further comprising a joined section, wherein the movable first section and the movable second section are pivotally coupled to the joined section. 
     EXAMPLE 86 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-87, to optionally include the sheet further comprising a joined sheet section configured to cover the joined section, wherein the first sheet section, the second sheet section, and the joined sheet section meet at the sheet junction. 
     EXAMPLE 87 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-86, to optionally include the mattress further comprises a movable third section and a movable fourth section that is laterally adjacent to and proximate to the movable third section, wherein the movable third section and the movable fourth section are pivotally coupled to the joined section. 
     EXAMPLE 88 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-87, to optionally include the sheet further comprising a third sheet section configured to cover at least a portion of the movable third section of the mattress and a fourth sheet section laterally adjacent to the third sheet section, the fourth sheet section configured to cover at least a portion of the movable fourth section of the mattress, wherein the third sheet section, the fourth sheet section, and the joined sheet section meet at a second sheet junction. 
     EXAMPLE 89 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-18, to optionally include a third member projecting laterally from the third sheet section toward the fourth sheet section, the third member extending up to the second sheet junction. 
     EXAMPLE 90 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-89, to optionally include and a fourth member projecting laterally from the fourth sheet section toward the third sheet section, the fourth member extending up to the second sheet junction. 
     EXAMPLE 91 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-90, to optionally include at least a portion of the third member overlaying at least a portion of the fourth member proximate to the second sheet junction. 
     EXAMPLE 92 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-91, to optionally include the first sheet section comprising a first side panel configured to cover a first side surface of the movable first section of the mattress. 
     EXAMPLE 93 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-92, to optionally include the second sheet section comprises a second side panel configured to cover a second side surface of the movable second section of the mattress. 
     EXAMPLE 94 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-93, to optionally include the first side panel is proximate to or in contact with the second side panel when the sheet is covering the mattress. 
     EXAMPLE 95 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-94, to optionally include at least a portion of the first side panel comprising one or more reduced-friction materials. 
     EXAMPLE 96 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-95, to optionally include at least a portion of the second side panel comprising one or more reduced-friction materials. 
     EXAMPLE 97 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-96, to optionally include at least a portion of the first side panel and at least a portion of the second side panel comprise one or more reduced-friction materials. 
     EXAMPLE 98 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-97, to optionally include the one or more reduced-friction materials comprising a lycra spandex fiber. 
     EXAMPLE 99 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-98, to optionally include the one or more reduced-friction materials comprising a polytetrafluoroethylene fiber. 
     EXAMPLE 100 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-99, to include subject matter (such as an apparatus, a device, a method, or one or more means for performing acts), such as can include a sheet for covering at least a portion of a mattress that includes a movable first section and a movable second section that is laterally adjacent to and proximate to the movable first section. The subject matter can include a top member configured to cover a top surface of the mattress and one or more side members coupled to the top member, the one or more side members being configured to cover one or more side surfaces of the mattress. A first portion of a the one or more side members can be configured to cover a side surface of the movable first section that is adjacent to the second movable section. A second portion of the one or more side members can be configured to cover a side surface of the movable second section that is adjacent to the first movable section so that when the sheet is covering the mattress the first portion of the one or more side members is proximate to or in contact with the second portion of the one or more side members. The first portion of the one or more side members and the second portion of the one or more side members comprise one or more reduced-friction materials. 
     EXAMPLE 101 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-100, to optionally include the reduced-friction material comprising a lycra spandex fiber. 
     EXAMPLE 102 can include, or can optionally be combined with the subject matter of one or any combination of EXAMPLES 1-101, to optionally include the reduced-friction material comprising a polytetrafluoroethylene fiber. 
     The above Detailed Description is intended to be illustrative, and not restrictive. For example, the above-described examples (or one or more elements thereof) can be used in combination with each other. Other embodiments can be used, such as by one of ordinary skill in the art upon reviewing the above description. Also, various features or elements can be grouped together to streamline the disclosure. This should not be interpreted as intending that an unclaimed disclosed feature is essential to any claim. Rather, inventive subject matter can lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separate embodiment. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. 
     In the event of inconsistent usages between this document and any documents so incorporated by reference, the usage in this document controls. 
     In this document, the terms “a” or “an” are used, as is common in patent documents, to include one or more than one, independent of any other instances or usages of “at least one” or “one or more.” In this document, the term “or” is used to refer to a nonexclusive or, such that “A or B” includes “A but not B,” “B but not A,” and “A and B,” unless otherwise indicated. In this document, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Also, in the following claims, the terms “including” and “comprising” are open-ended, that is, a system, device, article, composition, formulation, or process that includes elements in addition to those listed after such a term in a claim are still deemed to fall within the scope of that claim. Moreover, in the following claims, the terms “first,” “second,” and “third,” etc. are used merely as labels, and are not intended to impose numerical requirements on their objects. 
     Method examples described herein can be machine or computer-implemented, at least in part. Some examples can include a computer-readable medium or machine-readable medium encoded with instructions operable to configure an electronic device to perform methods or method steps as described in the above examples. An implementation of such methods or method steps can include code, such as microcode, assembly language code, a higher-level language code, or the like. Such code can include computer readable instructions for performing various methods. The code may form portions of computer program products. Further, in an example, the code can be tangibly stored on one or more volatile, non-transitory, or non-volatile tangible computer-readable media, such as during execution or at other times. Examples of these tangible computer-readable media can include, but are not limited to, hard disks, removable magnetic disks, removable optical disks (e.g., compact disks and digital video disks), magnetic cassettes, memory cards or sticks, random access memories (RAMs), read only memories (ROMs), and the like. 
     The Abstract is provided to comply with 37 C.F.R. §1.72(b), to allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 
     Although the invention has been described with reference to exemplary embodiments, workers skilled in the art will recognize that changes may be made in form and detail without departing from the spirit and scope of the invention.