Patent Publication Number: US-7721950-B1

Title: Automated transaction machine

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
   This application claims benefit pursuant to 35 U.S.C. §119(e) of Provisional Application 60/724,671 filed Oct. 7, 2005, the disclosure of which is incorporated herein by reference. 
   This application also claims benefit pursuant to 35 U.S.C. §120 of U.S. application Ser. No. 10/688,621 filed Oct. 17, 2003, which claims benefit pursuant to 35 U.S.C. §119(e) of provisional applications 60/419,681 filed Oct. 18, 2002 and 60/435,153 filed Dec. 19, 2002, the disclosures of each of which are incorporated herein by reference. 

   TECHNICAL FIELD 
   This invention relates to automated banking machines. Specifically embodiments relate to automated banking machines that have the capability of receiving financial instrument sheets such as notes, checks and other documents from users. Further embodiments relate to automated banking machines capable of receiving currency notes and recycling the currency back into circulation. Further embodiments relate to constructions and interrelationships of machine components to improve service and serviceability of the machines. 
   BACKGROUND ART 
   A common type of automated banking machines used by consumers is an automated teller machine (“ATM”). ATMs enable customers to carry out banking transactions. Banking transactions carried out using ATMs may include the dispensing of cash, the making of deposits, the transfer of funds between accounts and account balance inquiries. The types of banking transactions a customer can carry out are determined by the capabilities of the particular banking machine and the programming of the machine of the institution operating the machine. For purposes of this disclosure an automated banking machine shall be deemed to include any machine that may be used to carry out transactions involving transfers of value. 
   Automated banking machines may be useful because they perform banking functions in a generally rapid and reliable manner. However there are situations where machines must go out of service for preventative maintenance or remedial service. In such cases it is desirable to enable an authorized servicer to complete the maintenance activity as expeditiously as possible. This task is desirably done by enabling ready access to the interior of the machine by authorized servicers while minimizing the risk of unauthorized access by criminals. 
   In order to carry out the variety of transactions, certain components of the ATM must work in coordinated movement. During servicing or replenishment activities, components must be moved from an operational position to a service position. In order to restore the ATM to an operational condition, the components must be properly re-installed to prevent malfunctions such as sheet jams. In order to achieve the goal of expeditious servicing of ATMs, it is necessary to provide mechanisms to direct and ensure proper realignment of components. 
   Thus there exists a need for automated banking machines with improved properties related to handling financial instrument sheets, security, and service capabilities. 
   DISCLOSURE OF INVENTION 
   It is an object of exemplary embodiments to provide an automated banking machine. 
   It is a further object of exemplary embodiments to provide an automated banking machine that has improved capabilities for handling financial instrument sheets. 
   It is a further object of exemplary embodiments to provide an automated banking machine that facilitates proper alignment of ATM components during servicing activities. 
   Further objects of exemplary embodiments will be made apparent in the following Best Modes for Carrying Out Invention and the appended claims. 
   Certain of the foregoing objects are accomplished in an exemplary embodiment by an automated banking machine which is an automated teller machine (“ATM”). The ATM includes a user interface which includes input devices for receiving identifying inputs that identify user accounts, as well as inputs from users that cause the machine to carry out transaction functions. The user interface further includes one or more output devices that output indicia such as instructions for a user in operating the machine. 
   Embodiments of automated banking machines may include note dispensing mechanisms operative to pass notes, currency, or other sheets from a location within the machine to users of the machine. The automated banking machines may include sheet acceptors able to receive a stack comprising one or more sheets from a machine user, to separate each of the sheets, to evaluate each sheet for one or more properties, and to segregate suspected invalid sheets from valid sheets. The sheet acceptor may be adapted to pass valid sheets through a sheet accepting opening in a secure chest portion. Exemplary embodiments may include movable and/or removable sheet acceptors. 
   Embodiments of automated banking machines may include sheet storage containers adapted to extend in the interior of the secure chest portion. The sheet storage containers are operative to receive sheets that pass through the sheet accepting opening in the chest. The sheet storage containers may be movable and/or removable. The sheet storage containers may be adapted for bulk storage, or alternately, the sheet storage containers may include various transports or mechanisms to stack and sort sheets received through the sheet accepting opening. Additionally, the sheet storage containers may be operatively connected with one or more note dispensing mechanisms, so as to comprise note recyclers whereby received currency may be recycled to users of the machine. 
   Exemplary embodiments may also include carriage assemblies and mechanisms operative to move machine components such as sheet acceptors, note transports, and sheet storage containers into and away from operative positions. 
   In an exemplary embodiment, a sheet transport is movably mounted in supporting connection with the ATM housing and extends through an opening in the chest portion. A sheet acceptor is movably mounted within the housing outside the chest portion. Movement of the note acceptor relative to the housing is operative to cause the sheet acceptor to engage and move the sheet transport relative to the opening, wherein when the sheet acceptor and the transport are in engaged relation, the sheet transport is enable to move sheets from the sheet acceptor through the opening and into the interior area of the chest portion. 
   In an exemplary embodiment, the automated banking machine employs a carriage assembly including a bracket and a carriage structure to align components of the banking machine and retain alignment of the components as they are moved into operative positions. The carriage structure supports a sheet acceptor in a racked position. The carriage structure may include a sheet transport operative to receive sheets from the sheet acceptor and direct them through an opening in the secure chest. The carriage structure is movable between an undocked position and a docked position. When the carriage structure is in the docked position, the sheet acceptor and the sheet storage container are in operative positions so that sheets are enabled to pass through a sheet accepting opening in the chest portion into the sheet storage container. 
   In the exemplary embodiment, the sheet acceptor may be engaged with the carriage structure in a racked position while the carriage structure is in the undocked position in order to pre-position the components relative each other. Concerted movement of the sheet acceptor and the carriage structure into the docked position maintains alignment of the sheet paths. A movement mechanism, which in some embodiments may include gear members carried on the carriage structure and the sheet acceptor opening, is operative to move the carriage structure between the undocked and docked positions. In an exemplary embodiment, the carriage structure further supports a sheet storage container that may be moved into an operative position with movement of the carriage structure into the docked position. 
   In an exemplary embodiment, the automated banking machine includes a monitoring mechanism operative to provide audible feedback when the storage container is disposed in the operative position. 
   In an exemplary embodiment, the sheet acceptor includes a main housing having at least one access opening therein and a cover operative to close the access opening. The cover is adapted to be selectively mounted to a side wall of the housing at either a first mounting site extending along a first edge of the access opening, or a second mounting site extending along a second side of the access opening. When the cover is selectively mounted at the first mounting site, the cover is operative to swing away from the access opening in a first direction, and when the cover is selectively mounted at the second mounting site, the cover is operative to swing away from the access opening in a second direction. Alternately, the cover may be displaced away from the access opening. In an exemplary embodiment, the cover is supported on the housing by a set of tabs which extend through corresponding slots in the cover. To access the interior of the main housing, for example for servicing, the cover may be swung open. Alternately, the cover may be removed by lifting it off the tabs. 
   In an exemplary embodiment, the automated banking machine includes a removable sheet storage container selectively extending in the interior area, wherein when the sheet storage container is in an operative position, the sheet storage container is operative to receive sheets from the sheet acceptor and deliver the sheets to a storage area within the container. The exemplary embodiment includes a carriage assembly disposed within the interior area for supporting the sheet storage container in the interior area and moving the sheet storage container into and away from the operative position. The exemplary carriage assembly includes a stationary member extending in the interior area, a movable frame, and a frame directing mechanism. The frame directing mechanism directs the frame to move from an out/down position into an in/up position. In the in/up position, the sheet storage container is locked in an operative position by a catch and the frame moving mechanism is prevented from moving. A lever member is operative to unlock the catch holding the storage container in the operative position. In exemplary embodiments, the sheet storage container is locked in the operative position automatically, eliminating the need for a separate manual locking operation. Also in the exemplary embodiments, the frame is biased to automatically move toward the out/down position when the lever member unlocks the sheet storage container. 
   It should be understood that the features described are exemplary and in other embodiments other approaches may be used which nonetheless employ the features and relationships claimed herein. 

   
     BRIEF DESCRIPTION OF DRAWINGS 
       FIG. 1  is a front plan view of an ATM fascia of an automated banking machine of an exemplary embodiment. 
       FIG. 2  is a schematic side view of components&#39; within a housing of the ATM shown in  FIG. 1 . 
       FIG. 3  is a rear view of the housing of the ATM of the exemplary embodiment. 
       FIG. 4  is a partial schematic side view of components within a housing of an exemplary ATM. 
       FIG. 5  is a partial side schematic view of components within a housing of an exemplary ATM, illustrating a sheet acceptor in an unracked position relative a note transport. 
       FIG. 6  is a partial side schematic view of components within a housing of the exemplary ATM shown in  FIG. 5 , illustrating a sheet acceptor in a racked position relative a note transport. 
       FIG. 7  is a partial side schematic view of components within a housing of the exemplary ATM shown in  FIGS. 5 and 6 , illustrating a sheet acceptor and a note transport in a docked (operative) position. 
       FIG. 8  is an isometric view of an exemplary carriage assembly as viewed from an interior of a secure chest portion. 
       FIG. 9  is a partial perspective view of the exemplary carriage assembly of  FIG. 8  as viewed from an exterior of a secure chest portion. 
       FIG. 10  is a schematic back view of an exemplary ATM in which various access doors are illustrated in an open condition. 
       FIG. 11  is a partial side schematic view of components within a housing of an exemplary ATM illustrating a movable sheet storage container. 
       FIG. 12  is a partial perspective view of a carriage assembly for movably mounting the sheet storage container shown in  FIG. 11 . 
       FIG. 13  is a partial isometric view of the carriage assembly shown in  FIG. 12  taken from an internal side. 
       FIG. 14  is a schematic view of a sheet acceptor showing a service cover in an open condition. 
       FIG. 15A  is a partial top view of a sheet acceptor housing showing a service cover in a closed position. 
       FIG. 15B  is a partial top view of a sheet acceptor housing showing a service cover opening away from an access opening in a first direction. 
       FIG. 15C  is an enlarged view of the area shown in  FIG. 15B . 
       FIG. 16A  is a partial top view of the sheet acceptor housing of  FIG. 15A  showing the service panel in an alternate closed position. 
       FIG. 16B  is a partial top view of a sheet acceptor housing showing a service cover opening away from an access opening in a second direction. 
       FIG. 17  is a partial side view of a sheet acceptor housing illustrating a tab. 
       FIG. 18  is a partial side view of a service cover illustrating a slot. 
   

   BEST MODES FOR CARRYING OUT INVENTION 
   Referring now to the drawings and particularly to  FIG. 1 , there is shown therein a front plan view of an exemplary automated banking machine, which in this embodiment is an automated teller machine (“ATM”)  10 . In this embodiment, ATM  10  is a through-the-wall type machine which includes a fascia  12 . Fascia  12  is accessible to users of the machine who are positioned externally of the wall  14 . In some embodiments wall  14  may be an exterior building wall and ATM  10  may be used in a walk-up or drive-up environment. Of course this configuration is merely exemplary and in other embodiments, other types of ATM configurations, such as standalone ATMs, may be used. 
   The exemplary ATM includes a user interface generally indicated  15 . The user interface of the exemplary embodiment includes input devices for receiving inputs from users. These input devices include a card reader  16 , a keypad  18 , function keys  20  and an imaging device  22 . In the exemplary embodiment the input devices may be used for providing identifying inputs such as indicia read from cards, numerical data or biometric data which may be used to identify a particular user of the machine an/or their accounts. In addition the exemplary input devices are also operative to receive transaction inputs which cause the ATM to carry out selected transaction functions. It should be understood that these input devices are exemplary and in other embodiments other types of input devices may be used. The exemplary user interface  15  further includes output devices. The output devices of the exemplary embodiment include a display  24 , a speaker  26 , and a headphone jack  28 . The output devices of the exemplary embodiment are operative to output indicia, either visual, audible or both, which are usable to operate the ATM. Of course the output devices shown in user interface  15  are exemplary and in other embodiments other or additional output devices may be used. 
   The exemplary ATM  10  further includes other transaction function devices. These transaction function devices include a receipt printer  30  which is operative to provide receipts to users of the machine. As shown in more detail in the interior view of the machine shown in  FIG. 2 , the receipt printer includes a paper supply  32  which supplies paper on which receipts are printed by a printer mechanism  34 . Printed receipts are then transported to the receipt opening the fascia  12  by a transport  36 . In exemplary embodiments the receipt printer used may be of the type shown in U.S. Pat. No. 5,850,075, the disclosure of which is incorporated herein by reference. Of course in other embodiments other types of receipt printers may be used. 
   The exemplary ATM  10  includes on the fascia as shown in  FIG. 1 , a cash dispensing opening  38  and a cash accepting opening  40 . Each of these openings is in operative connection with corresponding transaction function devices, and each has an associated gate mechanism which operates to block access through the opening except at appropriate times during transactions by authorized users. In the exemplary embodiment the cash dispensing opening is shown controlled by a gate  42  and the cash accepting opening is controlled by a gate  44 . It should be understood that the fascia and devices associated with ATM  10  are exemplary and in other embodiments other or different fascia configurations and devices may be used. 
   As shown in  FIGS. 2 and 3 , ATM  10  includes a housing  46 . Housing  46  includes a chest portion  48 . In the exemplary embodiment chest portion  48  is a generally secure chest which has an access opening and a safe-like access door  50 . Access to the interior of the chest portion is limited to authorized personnel through a suitable locking mechanism schematically indicated  52 . In an exemplary embodiment the chest is generally L-shaped in cross section, although in other embodiments other configurations may be used. 
   Housing  46  further includes an upper portion  54 . Upper housing portion  54  which is in connection with the fascia, is in supporting connection with the chest portion  48 . In the exemplary embodiment upper housing portion  54  has in association therewith, access doors  56  and  58 . Access to the upper housing portion is controlled by one or more locking mechanisms in operative connection with access doors  56  and  58  as represented by key locks  60  and  62 . In the exemplary embodiment the secure chest portion  48  is used to house financial instrument sheets such as currency notes, checks and other valuable sheets. The upper housing portion  54  is generally used to house components of the machine that do not hold on an extended basis, notes or other financial instrument documents which can be redeemed for value. Of course it should be understood that the construction of ATM  10  is exemplary and in other embodiments other approaches may be used. 
   As schematically shown in  FIG. 2 , ATM  10  includes at least one controller schematically indicated  64 . In the exemplary embodiment controller  64  includes at least one processor and is in operative connection with at least one data store schematically indicated  66 . In the exemplary embodiment the data store is operative to hold data representative of instructions such as computer programs, configuration parameters, data about transactions conducted and other information that may be usable in the operation of the ATM  10 . Computer executable instructions executed by the one or more controllers may be resident on and/or loaded from articles suitable for holding such computer executable instruction. Such articles may include hard disk drives, floppy disks, flash memory, CD ROMs, PROMs, or other articles from which a computer can read and execute instructions. 
   Controller  64  is in operative connection with numerous transaction function devices within the ATM, and is operative to control the operation thereof in accordance with its programming. Controller  64  is shown schematically in operative connection with devices  68 ,  70 , and  72 . It should be understood that this representation is schematic only and is intended merely to represent numerous components within the machine which are in operative connection with the controller. For example the transaction function devices may include moving devices which may be referred to alternately herein as drives, such as motors, solenoids, and other devices that are operative to impart motion to components. Likewise transaction function devices may include sensors such as radiation sensors, proximity sensors, switches and other types of sensors that are operative to sense items, users, conditions, properties, characteristics, or components within the ATM and to enable a controller to perform functions in accordance with its programming. Transaction function devices include output devices such as sound emitters and light emitting devices. For example, and without limitation, transaction function devices may include the card reader, display, keyboard, function keys, printer, cash dispenser, cash acceptor, storage mechanisms and other devices previously discussed as well as other devices within the machine which are operative in response to the controller. 
   In the exemplary embodiment the controller is also in operative connection with a communications device schematically indicated  74 . The communications device is operative to communicate messages electronically between the ATM  10  and other computers in financial transaction processing systems. These may include for example communications with systems operated by banks, credit card networks, automated clearinghouses, and other entities. In  FIG. 2  the communications device  74  in the ATM  10  is schematically shown as providing communication with a financial institution  76  through a network  78 . It should be understood that this communication configuration is exemplary and in other embodiments other communication arrangements may be used. U.S. Pat. No. 6,505,177 also shows an exemplary communication system for an ATM and the disclosure thereof is incorporated herein by reference. Embodiments may include features of U.S. Pat. Nos. 6,705,517; 6,672,505; and 6,598,023, the disclosures of which are incorporated herein by reference. 
   In the operative position of ATM  10 , the housing  46  houses a sheet acceptor  80  which is also referred to herein as a cash acceptor. In the exemplary embodiment, the sheet acceptor  80  is operative to accept sheets from a machine user through the cash accepting opening  40 , to analyze each sheet for at least one property or characteristic, and to route the sheets selectively for storage within the housing of the machine based on the characteristics analyzed. It should be understood that in various embodiments the term “sheet” may include currency notes, checks, or other financial instrument sheets. It should further be understood that in exemplary embodiments the financial instrument sheets may be sheets comprised of different types of material such as paper, plastic, or combinations thereof. It should further be understood that references herein to a sheet acceptor will be deemed to encompass mechanisms which handle not only currency notes, but also other financial instrument sheets such as checks, money orders, gift certificates, vouchers, etc. 
   As represented in  FIG. 2 , sheet acceptor  80  includes a chute  82  which extends through cash accepting opening  40  in fascia  15  in its operative condition. The user accessible opening to chute  82  is controlled by a movable gate  44 . Gate  44  moves responsive to the controller  64  and enables authorized users to access the chute at appropriate times during transaction sequences. 
   In operation of the machine users are enabled to insert a stack of financial instrument sheets schematically indicated  84 , into the chute. The stack  84  may comprise currency notes, checks or other forms of financial sheets. 
   In an exemplary embodiment, in operation of the sheet acceptor, sheets are individually separated from the stack by a picker mechanism  86 . Each picked sheet is transported individually from the picker mechanism past a validator device schematically indicated  88 . The picker mechanism may be of the type shown in U.S. Pat. No. 6,874,682, the disclosure of which is incorporated herein by reference. Other mechanisms and devices operative to individually separate sheets from a stack may be utilized within the scope of the invention. 
   The validator device  88  is operative to determine at least one characteristic of each sheet. This may include for example, devices which sense for one or more characteristics of valid notes or other valid sheets of the type to be analyzed. Exemplary embodiments of the validating device may be of the type shown in U.S. Pat. No. 5,923,415 and U.S. Pat. No. 6,554,185, the disclosures of which is incorporated herein by reference. In other embodiments other types of validating devices such as imagers, readers, sensors, and combinations thereof may be used. In other embodiments the sheet accepting device may include features for imaging and analyzing checks, bills, vouchers or other sheets and may include features described in U.S. patent application Ser. No. 11/370,525 filed Mar. 8, 2006 the disclosure of which is incorporated herein by reference. 
   In the exemplary embodiment of the sheet acceptor  80 , sheets which have been analyzed through operation of the validator device  88  are moved through a transport  90  to a routing device  92 . The routing device is operative responsive to the controller  64  to route sheets selectively to either an escrow device  94  or a transport  96 . Escrow device  94  generally operates to hold sheets in storage on a temporary basis. Such an escrow device may be of the type shown in U.S. Pat. No. 6,371,368, the disclosure of which is incorporated by reference herein. Escrow device  94  may be operative to accept sheets and store them. Thereafter responsive to operation of the controller  64  the escrow device may deliver those sheets to the routing device  92  which directs them along sheet paths in the machine to carry out transactions. The escrow device shown is exemplary and in other embodiments other types of escrow devices may be used. 
   In the exemplary embodiment transport  96  is used to receive unacceptable sheets which have characteristics that do not satisfy certain parameters set by the machine or are otherwise deemed unacceptable. As schematically represented, sheet acceptor  80  is operated to cause transport  96  to deposit suspect sheets schematically indicated  98  into a storage area  100 . In the exemplary embodiment the suspect sheets are stored within the sheet acceptor  80  and outside of the secure chest  50  so that they may be recovered by servicing personnel. 
   In the exemplary embodiment the sheet acceptor  80  is operative responsive to signals from the controller  64  to cause financial instrument sheets that are determined to be valid or otherwise acceptable, to be directed through a cash or sheet accepting opening  102  that extends in an upper surface  104  of the chest. 
   In this exemplary embodiment, a transport  106  in the sheet acceptor  80  is aligned with the cash accepting opening  102  and a transport  108  that extends into the secure chest  50 . As schematically represented, at least one driving member  110  of the transport  106  is in operative connection with a driven member  112  of the transport  108 . In the exemplary embodiment, this arrangement enables the sheet acceptor  80  to transmit movement to other mechanisms within the secure chest and to assure coordinated movement of processed sheets therein. Further, in the exemplary embodiment the driving and driven members extend in the cash accepting opening so as to block access therethrough by unauthorized persons. 
   In the exemplary embodiment, after sheets pass into the secure chest, they may be acted upon by various mechanisms and devices which allow storage of the sheets at a storage site, schematically designated  113  in  FIG. 2 . The storage site  113  may further include mechanisms and devices that separate and/or stack the sheets for storage or distribution. In alternate embodiments, the sheets may be directed to a bulk storage site for later collection. In still other alternative embodiments the sheets may be directed to mechanisms from which they can be later dispensed and “recycled” by the machine. 
   In an exemplary embodiment, the sheet acceptor  80  is provided as a modular unit that may be moved from the operative position shown in  FIG. 2  to a servicing position, shown schematically in  FIG. 4 . In the exemplary embodiment, when the sheet acceptor  80  is moved from the operative position shown in  FIG. 2  to a servicing position, the driving member  110  and the driven member  112  disengage. In some exemplary embodiments the movement of the sheet acceptor from the operative position to a servicing position may include movably mounting the sheet acceptor such that the sheet acceptor moves both upwardly away from the secure chest so as to disengage the driving and driven members as well as outwardly for purposes of servicing. To return the sheet acceptor to the operative position, movement thereof is made both inwardly and downwardly so as to re-engage the driving and driven members. The movement of the sheet acceptor may be accomplished by a combination of slides, rollers or other suitable mechanisms. The approach described of providing for engagement between the sheet acceptor and a mechanism for handling sheets within the secure chest is exemplary and in other embodiments other approaches may be used, or the transport within the secure chest may have a separate motor or other moving device. With reference to  FIG. 4 , the sheet storage site  113  may include various transports  114 ,  116  and sheet handling mechanisms  118  to direct movement of notes to a note storage mechanism  146 . In exemplary embodiments, the note storage mechanism  146  may be operative to return notes to circulation to users of the machine. 
   With reference to  FIGS. 5-9 , an exemplary embodiment of an ATM is shown. The exemplary ATM may include any of the previously described features and components such as a user interface, input devices, output devices, displays, controllers and processors, communication devices, note dispensers, validating devices, imaging devices, and the like, all not shown in these views. In the exemplary embodiment, a sheet acceptor  80  is movably mounted relative to and in supporting connection with the ATM housing. The sheet acceptor  80  is operative to engage a carriage assembly  150  operative to support the sheet acceptor  80  and to guide movement of the sheet acceptor into the operative position. The carriage assembly  150  includes a bracket member  152  which, in this embodiment, remains stationary with respect to the secure chest  48  and extends into the interior area of secure chest  48 . A carriage structure  154  is supported by bracket member  152 , in movable relationship with respect to the secure chest  48 . When the carriage structure  154  is in a first predetermined position relative the secure chest  48 , the carriage structure is said to be in an “undocked” position ( FIGS. 5 and 6 ). When the carriage structure  154  is in a second predetermined position relative the secure chest  48 , the carriage structure is said to be in a “docked” position ( FIG. 7 ). 
   In the exemplary embodiment, a sheet transport  155  is mounted in supporting connection with the carriage structure  154  so as to be movable therewith. The sheet transport  155  extends in the sheet accepting opening  102 , is movable therein, and is operative to receive sheets from the sheet acceptor  80  and to pass them into the interior area of the secure chest. 
   In the exemplary embodiment, the carriage assembly also includes a biasing member which in the exemplary embodiment comprises a spring  158  extending between the bracket member  152  and the carriage structure  154 . The biasing member is operative to urge the carriage structure away from the docked position so that when the sheet acceptor  80  is moved away from operative engagement with the carriage structure, the carriage structure will automatically move away from the docked position. One exemplary construction of the carriage assembly is shown in the Figures. Embodiments are not limited to the arrangement of parts shown, but also encompass other constructions having biasing members and devices that operate to urge the carriage structure away from the docked position upon disengagement of the sheet acceptor. 
   The sheet acceptor  80  may be mounted in operative supporting engagement with the carriage structure  154 , herein referred to as a “racked” position ( FIG. 6 ). When the sheet acceptor  80  is in the racked position, the carriage structure and the sheet acceptor  80  are adapted for coordinated movement, and the sheet transport  155  is in operative alignment with the sheet acceptor. Movement of the carriage structure  154  into the “docked” position is operative to move the sheet acceptor into the operative position relative the secure chest such that sheets from the sheet acceptor are enabled to be passed into the interior area of the secure chest. 
   In this exemplary embodiment, the carriage structure includes a plate member  156  which is movably mounted in a slidable relationship relative to an upper surface  104  of secure chest  48 . Plate member  156  may include one or more docking pins  160  extending therefrom. In this exemplary embodiment, one or more docking feet  162  are adapted for operative engagement with docking pins  160  carried on the sheet acceptor  80 . Of course, other constructions that enable the sheet acceptor  80  to be initially aligned with a carriage structure to enable coordinated movement therewith, may be used in alternative embodiments. For example, other types of interlocking members may be used. 
   In the exemplary embodiment, the sheet transport  155  defines a first sheet path  168  traveled by sheets passing through the sheet accepting opening  102 . In the exemplary embodiment, the sheet acceptor  80  defines a second sheet path  170  traveled by sheets moving toward the sheet accepting opening. When the sheet acceptor  80  is in the racked position relative the carriage structure  154 , the second sheet path  170  is substantially aligned with the first sheet path  168 , as shown in  FIG. 6 . As the carriage structure moves into the docked position, the first and second sheet paths remained aligned. 
   In the exemplary embodiment, the ATM includes a carriage movement mechanism, generally denoted  178 . When the sheet acceptor is in operative engagement with the carriage structure, i.e., in the racked position, the carriage movement mechanism is operative to move the sheet acceptor  80  in concerted movement with the sheet transport  155  toward the docked position. In the exemplary embodiment, the carriage movement mechanism retains the first and second sheet paths in substantial alignment as the sheet transport  155 , with the sheet acceptor  80 , is moved relative to carriage structure  154 . 
   In an exemplary embodiment, the carriage movement mechanism  178  includes a first gear member  180  operatively supported on the carriage structure  154  adjacent the first sheet path  168  and a second gear member  182  operatively on the sheet acceptor  80  adjacent the second sheet path  170 . When the sheet acceptor  80  is in the racked position, the first and second gear members are adapted for operative engagement. In some embodiments either the first gear member or the second gear member may act as a drive gear whereby the other gear is a driven gear. In the exemplary embodiment shown, rotation of the drive gear is operative to cause relative movement of the carriage structure, and the concerted movement of the sheet acceptor  80 , into the docked position. The illustrated carriage movement mechanism  178  is merely exemplary and other means operative to move carriage structure  154  into the docked position are contemplated. For example, other driver means and/or biasing members may be employed to move the carriage structure  154  after the sheet acceptor  80  is operatively engaged with the note transport  155 . 
   When the carriage structure is in the docked position, the previously aligned first and second sheet paths are placed into an operative position and are enabled to selectively pass sheets through the sheet accepting opening  102  and into the interior area of chest portion  48 . 
   The exemplary embodiment includes a sheet storage container  186  extending in the interior area of chest portion  48 . Exemplary storage containers  186  may be movable within the interior of the chest portion  48  and/or selectively removable from the machine. The sheet storage container which may be a so-called free-fall or bulk storage container, or a stacking cassette. In either case, the sheet storage container  186  is operative to receive sheets that pass through the sheet accepting opening. 
   In the exemplary embodiment, sheet storage container  186  is adapted for mounting on the carriage structure  154  which serves as a mount, at a mounting site  190 . In the exemplary embodiment, the mounting site may include one or more rails or support structures adapted to selectively engage the storage container  186 . In the exemplary embodiment, the container is movable in engaged relation with the carriage structure and appropriate stops and alignment mechanisms may be used to position the storage container  186  in relation to the carriage structure  154 . 
   In the exemplary embodiment, the sheet storage container  186  is adapted for coordinated movement with the carriage structure, so that as the carriage structure is moved into the docked position, the sheet storage container is moved into an operative position in which the container is able to receive sheets passing through the sheet accepting opening. Thus, the sheet acceptor, the sheet transport, and the storage container may be “pre-aligned” prior to concerted movement with the carriage structure  154  into the docked position. 
   In the exemplary embodiment, the sheet storage container  186  may include one or more cassettes operative to receive currency notes that pass through the sheet accepting opening and store them in the interior of the chest portion in stacked relation and/or according to note denomination. In some exemplary embodiments, the ATM may be operable to recycle currency by preparing received notes to be returned to the same or subsequent machine users. In such embodiments, the one or more stacking cassettes may be operatively connected with a note dispensing mechanism. Examples of sheet accepting and stacking mechanisms as well as sheet accepting, stacking, and dispensing mechanisms which may be used in some exemplary embodiments are described in detail in U.S. Pat. Nos. 6,302,393 and 6,209,070, the disclosures of each of which are incorporated herein by reference. 
   In the exemplary embodiment, it is desirable to maintain the interior components of the sheet acceptor  80  generally isolated and in sealed relation except when access is required for servicing. With reference to  FIG. 3 , in the exemplary embodiment, the ATM  10  may be a “rear-load” ATM such that access for servicing and accessing the sheet acceptor is provided through access door  58 . In this exemplary embodiment, the “undocked” position of the carriage structure  154  is disposed generally rearwardly of the “docked” position so that movement of the carriage structure from the undocked position into the docked position entails moving the carriage structure toward a front of the machine. 
   In exemplary embodiments, the ATM may include one or more monitoring mechanisms  190  to indicate whether certain movable components have been moved to an operative position. An exemplary monitoring mechanism includes one or more sensors in operative connection with an audible output device. The output device is operative to provide an audible output, such as a beeping noise. The monitoring mechanism may be used, for example, on embodiments of ATMs having movable sheet storage containers to indicate that the sheet storage container has moved so as to be properly positioned in the operative position. Of course other types of indications of proper positioning can be used such as visual or vibratory indicators. The monitoring mechanism may comprise a stand-alone circuit card assembly in operative connection with one or more sensing devices. Alternatively, such monitoring capability may be an integral part of other ATM circuitry. This arrangement is merely exemplary and other means of providing audible, visual or other user feedback upon proper positioning of movable components are provided within the scope of the invention. As should be apparent, the monitoring mechanisms can be used with free-fall sheet storage containers or with stacking cassettes depending on the particular application. It is further desirable in some embodiments to provide such audible feedback mechanisms on ATMs having movable sheet acceptors so that proper positioning can be monitored. 
   In an exemplary embodiment, the sheet acceptor  80  may be moved relative the ATM housing to extend outwardly from the ATM housing through opening access door  58 , without accessing the interior area of chest portion  48  through chest door  50  (see  FIG. 3 ). To place the sheet acceptor  80  into an operative position, the sheet acceptor is moved relative to and in supporting connection with the chest portion of the ATM. The docking feet  162  carried on the sheet acceptor  80  are relatively moved to engage the docking pins  160  carried on the carriage structure so that the sheet acceptor is in operative engagement with the sheet transport  155 . The sheet transport and the sheet acceptor  80  are moved in concerted movement to a docked position wherein sheets are enabled to pass from the sheet acceptor  80  to the sheet transport. 
   In an exemplary embodiment when the sheet acceptor is moved into proximity to the docked position, a driving gear  182  carried on the sheet acceptor  80  is operative to engage a gear member  180  carried on the carriage structure adjacent the sheet transport. Operation of the driving gear causes the concerted movement of the sheet acceptor  80  and the sheet transport relative to the chest portion. In an exemplary embodiment, a sheet storage container may be mounted onto the carriage structure  154  so that operation of the driving gear causes concerted movement of the sheet storage container  186  with the movement of the sheet acceptor  80  and the sheet transport  155 . This may be accomplished for example, through operation of a processor which operates responsive to signals from a sensor or other input device, which is used to sense or indicate that the sheet acceptor and carriage are in proximity to the docked position. The processor may operate responsive to such signals to cause operation of at least one drive to move a driving gear until the sheet acceptor and carriage move to the docked position. Of course, this approach is merely exemplary. 
   With reference to  FIGS. 10-13 , in an exemplary embodiment, an ATM  10  includes a housing  46  having a secure chest portion  48  having a sheet accepting opening  102  in a wall thereof providing access to an interior area of the chest portion  48 . The exemplary ATM may include a note dispenser, schematically represented as  190 , adapted to dispense notes stored in the interior area to users of the machine. The exemplary ATM includes a sheet acceptor  80  movably mounted within and in supporting connection with the housing outside the chest portion  48 . When the sheet acceptor  80  is in an operative position, the sheet acceptor is operative to receive sheets input to the machine and to pass sheets through the sheet accepting opening  102  into the interior area of the chest portion. In exemplary embodiments, the sheet acceptor  80  is further operative to separate sheets from a stack, validate sheets, image sheets, and/or segregate valid sheets from invalid sheets. The sheet acceptor  80  may be further operative to store invalid sheets in a sheet storage location and pass the valid sheets to the interior area of the chest portion  48 . 
   The exemplary embodiment includes a sheet storage container  186  extending in the interior area. In the exemplary embodiment, the sheet storage container is movably mounted within and in supporting connection with the chest portion. The sheet storage container is movable into an operative position in order to receive notes from the sheet acceptor  80  and deliver the sheets to a storage area within the container. 
   In an exemplary embodiment, the ATM includes a mount, which includes a carriage assembly  194  disposed within the interior area to support the sheet storage container and move it into and away from the operative position. With reference to  FIGS. 11-13 , the exemplary carriage assembly  194  includes a stationary member  196  extending in the interior area. A movable frame  198  adapted to selectively engage the sheet storage container  186  is mounted in supporting connection with the stationary member. In the exemplary embodiment, the movable frame  198  comprises a U-shaped body  200  including a pair of legs  202 ,  204  each extending adjacent one of the opposite planar sides  206 ,  208  of the stationary member and a transverse member. The sides bound a container holding area. In the exemplary embodiment, the frame  198  includes devices such as stop pins  212  to facilitate proper positioning of the sheet storage container. The frame  198  is operative to move relative to the stationary member between an out/down position and an in/up position (shown in phantom in  FIG. 11 ). When the frame  198  is in the in/up position, the storage container supported thereon is in the operative position. When the frame  198  is in the down/out position, the storage container is in a release position and may be disengaged from the frame, removed and/or replaced. A container may also be engaged with the frame in the release position. The frame  198  is movable between the down/out position and the in/up position by operation of a frame directing mechanism, generally denoted  218 , mounted in supporting connection with the stationary member. 
   The exemplary frame directing mechanism  218  directs movement of the frame and includes a pair of spaced first arm members  220 ,  222  mounted in pivotable connection with the first side  206  of the stationary member  196  and in operative connection with the first leg  202  of the movable frame  198 . The first arm members  220 ,  222  are operative to pivot in coordinated movement in a first manner to direct the frame  198  responsive to inward force into the in/up position. The first arm members are operative to pivot in coordinated movement in a second manner to move the frame  198  into the down/out position. In the exemplary embodiment, a pair of spaced second arms  224 ,  226  (shown in phantom in  FIG. 12 ) are mounted in pivotable connection with the second planar side  208  of the stationary member  196  and in operative connection with the second leg  204  of the movable frame  198 . Each arm member is mounted in rotatable supporting connection with the stationary member adjacent its lower end through a pin  228  or other mounting structure enabling rotation of the arm member. 
   Each of the first arm members are pivotally movable with a member attached to an upper end thereof such as a pin  234 , within a pair of spaced first arcuate slots  230 ,  232  in the first planar side  206  of the stationary member  196 . In the exemplary embodiment, the first arm members are disposed substantially externally of the first side of the stationary member and the movable frame  198  is disposed internally of the first side. The second arm members  224 ,  226  are likewise pivotally movable such that a pin member  234  attached to an upper end thereof is movable within a pair of spaced second arcuate slots  234 ,  236  in the second side  208  of the stationary member  196  and are disposed substantially externally of the second planar side  208  of the stationary member  196 . Each of the pin members  234  attached adjacent to the upper end of each arm is in operative connection with the frame  198 . 
   With particular reference to  FIG. 11 , when the frame  198  is in the out/down position, a sheet storage container may be operatively supported thereon in an unmounted position. The sheet storage container  186  may be moved inwardly, relative to the frame  198 , until the transverse member  210  disposed at the internal end of the frame  198  is engaged by the container. At this point, the sheet storage container  186  occupies a mounted position relative the frame  198  and is in the release position. Further inward movement of the sheet storage container is associated with operation of the frame directing mechanism  218 . Each of the first arm members  220 ,  222  which are operatively connected to the frame through the pin members  234  adjacent to the upper ends thereof, pivots about its respective pivot axis at the lower end about pins  238  so that frame  198  is moved to the in/up operative position, shown in phantom. The sheet storage container then occupies the operative position where it is operative to receive sheets passing through the sheet accepting opening in the chest portion. In the exemplary embodiment, the sheet storage container is moved inwardly responsive to a manually applied force. In other embodiments, other means of exerting a force against the sheet storage container may be utilized. This may include a motor, solenoid or other drive, for example. 
   A plate member  236  is mounted in movable supporting connection with the frame directing mechanism  218 . In particular, in the exemplary embodiment, the plate member  236  is mounted in supporting connection with the pair of first pivot arms  220 ,  222 . The plate member  236  is movable between an outward position and an inward position (shown in phantom). Movement of the frame  198  into the in/up position (and the container to the operative position) is associated with movement of the plate member  236  into the inward position. Movement of the frame  198  into the out/down position (and the container to the release position) is associated with movement of the plate member into the outward position. In the exemplary embodiment, the plate member  236  is disposed generally externally of the pair of first pivot arms  220 ,  222 . The plate member of the exemplary embodiment is mounted in supporting connection with the arms through pins  246  or other suitable connecting members as shown. 
   In the exemplary embodiment, the plate member  236  includes a cam slot  240  therein having a substantially horizontal portion indicated H. Horizontal portion H of the slot intersects with a substantially vertical portion of the slot indicated V. The cam slot  240  is adapted to receive a pin member  242  which is operatively connected to a locking pin  244  mounted in slidable supporting connection with the first side  206  of the stationary member  196 . In the exemplary embodiment, the locking pin  244  is disposed substantially internally of a first side  206  of the stationary member  196  and the pin member  242  extends through an elongated vertical slot  248  formed in the first side  206 . In the exemplary embodiment the locking pin  244  is movably mounted in supporting connection with side  206 . The locking pin is supported and constrained to move vertically through members extending through vertical guide slots in side  206 . Of course this approach is exemplary. 
   The pin member  242  is adapted for relative displacement within the substantially horizontal portion H of the cam slot  240  toward and away from the substantially vertical portion V in association with movement of the plate member  236 . In this exemplary embodiment, relative displacement of the pin member  242  within the substantially vertical portion V of the cam slot  240  is associated with vertical movement of the locking pin  244 . 
   With particular reference to  FIG. 13 , a lever member  250  is mounted in pivotable connection with the first side  206  of the stationary member  196  and in operative connection with the pin member  242  extending from the locking pin  244 . In the exemplary embodiment, the lever member  250  is mounted internally of the stationary member  196 . The lever member  250  is operative to pivot about a first pivot axis  252 , which is defined by a pin or other suitable member which enables rotational movement of the lever. 
   In the exemplary embodiment, the sheet storage container  186  includes a locking recess thereon  256 . The locking pin  244  is adapted to engage the locking recess  256  when the sheet storage container  186  is in the operative position. The locking pin  244  is operative to slide relative the stationary member into a locked position, illustrated in  FIG. 11 , wherein the locking pin engages the recess  256 . In this position the sheet storage container is retained in the operative position and the frame  198  is prevented from moving. In the exemplary embodiment, the locking pin  244  is aligned with and changeable in locking recess  256  only when the sheet storage container  186  is in the operative position. 
   Movement of the locking pin  244  with regard to engagement with the recess  256  is associated with pivotal movement of the lever member  250 . Thus, movement of the locking pin  244  from an unlocked position into the locked position is associated with upward pivotal movement of a first end  260  of lever member  250 , and downward movement of the pin member  242  in the substantially vertical portion V of cam slot  240 . In the exemplary embodiment, a biasing member, or spring  262  is operative to urge the second end  264  of the lever member downwardly and the first end  260  of the lever member  250  upwardly, which in turn urges the locking pin  244  into the locked position. 
   When the locking pin and recess  256  are engaged the sheet storage container is held in the operative position and is enabled to accept sheets therein. To release the locking pin  244  and enable removal of the storage container, the first end of the lever member  250  is manually engaged and pivoted downwardly which moves the pin member upwardly in the substantially vertical portion V of the cam slot  240  toward the horizontal portion H. In the exemplary embodiment, the plate member  236  is biased toward the outward position by biasing member or spring  268 . The location of spring  268  as illustrated is merely exemplary and other constructions are contemplated. When the pin member  242  reaches the horizontal portion H of the cam slot  240 , the plate member is urged toward the outward position, and the first pivot arms are pivoted in a second manner to move the frame  198  into the out/down position. In this position the container is in the release position. Of course, other biasing members or approaches may be utilized to bias the frame  198  into the out/down position. From this position the storage container may be moved relative to the frame so as to be disengaged therefrom. 
   Thus, the locking pin  244  is adapted to automatically slide into engagement with the locking recess  256  in the sheet storage container  186  as the sheet storage container is moved into the operative position. Additionally, releasing the lever member  250  is operative to unlock the sheet storage container and automatically operate the frame moving mechanism. It should be understood that the releasable catch described for holding the container in the operative position is exemplary. In other embodiments other types of releasable catch mechanisms may be used. 
   In one exemplary embodiment, the ATM may be a rear-load ATM, wherein access to the interior area of the chest portion is obtained through a door mounted in supporting connection with the rear of the ATM housing. In a rear-load ATM the frame  198  is operative to move toward the front of the machine in order to place the sheet storage container  186  into the operative position. The sheet storage container may thus be removed away from the rear of the ATM. 
   In other exemplary embodiments, the ATM may be a front-load ATM, wherein access to the interior area of the chest portion is obtained through a chest door mounted in supporting connection with the front of the ATM housing. In a front-load ATM, the sheet storage container may be removed from the front of the ATM. Thus, the frame  198  would be adapted to move toward the rear of the machine in order to place the sheet storage container into the operative position. 
   In one exemplary embodiment, the stationary member  196 , the plate member  236 , and the pivot arms  220 ,  222  are constructed and operatively connected to be adapted for use with either rear-load or front-load ATMs. As illustrated in  FIG. 11 , the arcuate slots  230 ,  232  include extension portions  272 ,  274  to accommodate movement of first pivot arms  220 ,  222 , respectively, in a front-load ATM. Additionally, the substantially horizontal portion H of the cam slot  240  includes a leg L to accommodate relative displacement of the pin member  242  toward and away from the substantially vertical portion V. As should be readily apparent, in a front-load ATM, the out/down position of the frame  198  would be toward the front of the ATM. Likewise, outward movement of the plate member would be toward the front of the ATM. In a rear-load ATM, the U-shaped body of the frame  198  is positioned so that the legs extend toward the rear of the machine. In a front-load ATM the legs extend toward the front of the machine. 
   In exemplary embodiments, the sheet storage container may comprise a free-fall or bulk storage container. In other exemplary embodiments, the sheet storage container may comprise one or more stacking mechanisms operative to receive sheets through the sheet acceptor opening, and stack the received sheets. In other embodiments, the sheet storage container may be in operative connection with one or more note dispenser mechanisms so that received currency may be recycled to the same or other users of the machine. 
   An exemplary embodiment may further include a monitoring mechanism operative to provide audible feedback or other human perceptible indication or output when the sheet storage container is moved into the operative position similar to the monitoring mechanisms  192  discussed earlier with respect to  FIGS. 5-7 . The monitoring mechanism may include one or more sensors and a stand-alone circuit control assembly or other suitable apparatus. Other mechanisms able to generate audible or other indications that the sheet storage container has been moved from into the operative position may be used. 
   A method of operation includes supporting a sheet storage container  186  in a release position in operatively supported connection a movable frame  198 , wherein the movable frame is initially disposed at the out/down position. The container is then moved relative to and in engagement with the movable frame from the unmounted position to a mounted position. With the container mounted on the frame, the frame is moved horizontally and inwardly relative to the chest opening controlled by the chest door. Such movement causes the frame directing mechanism  218  to direct the movable frame into the in/up position in order to place the sheet storage container into the operative position. 
   As the frame moves into the in/up position, the plate member  236  is moved from an outward position to an inward position, and the pin member  242  moves within the horizontal portion H of the cam slot  240  relative to the plate member until it is aligned with the substantially vertical portion V. When the pin member reaches the substantially vertical portion of the slot, a biased lever member  250  pulls the pin member downwardly, causing the locking pin  244 , which is slidably mounted in supporting connection with the stationary member  196 , to engage a recess  256  in the sheet stacking container. Simultaneously, as the locking pin engages the recess, a first end of the lever member is upwardly moved responsive to pivoting motion. When the locking pin  244  is in the locked position, the sheet storage container is retained in the operative position and the frame is prevented from moving. A monitoring mechanism  192  may sense and provide audible feedback to indicate that the sheet storage container has reached the operative position. 
   In order to unlock the sheet storage container, the first end of the lever member  250  is downwardly moved. This causes the lever to pivot and the locking pin  244  is lifted away from engagement with the locking recess  256 . Simultaneously, the pin member  242  moves in the substantially vertical portion V of the cam slot  240  until it reaches the substantially horizontal portion H. Upon pin  242  reaching the vertical portion of the cam slot the biased plate member  236  moves toward the outward position causing the frame moving mechanism  218  to move the frame into the out/down position. In some embodiments the frame moving mechanism may also be separately biased by a suitable spring or other biasing device toward the out/down position. 
   The sheet storage container  186  is then moved relative to and in supporting connection with the frame  198  away from the mounted position to the unmounted position. Once the container is disengaged from the frame it may be removed from the machine. 
   To service a rear-load ATM, a chest door  50  mounted in supporting connection with the rear of the housing is opened to provide access to the interior area of the chest portion. To service a front-load ATM, a door mounted in supporting connection with the front of the housing is opened to provide access to the interior area of the chest portion. The exemplary embodiment may further include a sheet acceptor  80  mounted in movable relation to the ATM housing. When the sheet acceptor  80  is in an operative position, and the sheet storage container is in an operative position, sheets are enabled to pass from the sheet acceptor to the sheet storage container. 
   With respect to  FIGS. 14-18 , an exemplary embodiment of a movable sheet acceptor  80  is shown. Although the ability of the exemplary embodiment to move the sheet acceptor  80  through a service opening of the ATM facilitates servicing, problems are still potentially present by the need to have to remove cover panels and the like from the sheet acceptor. Further, there is always a risk that cover panels, once removed, will not be replaced resulting in infiltration of contaminants to the sheet acceptor and causing malfunctions and failures. 
   To reduce the risk of service persons not replacing service panels the exemplary embodiments, such panels are made to minimize the risk that service panels will be removed and not replaced. As shown in  FIG. 14 , in one exemplary embodiment, a service cover  270  is mounted in movable supporting connection with a main housing  274  of a sheet acceptor  80 . The service cover  270  is operative to selectively close an access opening  272  to an interior of the main housing. In the exemplary embodiment, the access opening  272  is in a first side wall  276  of the main housing  274 . When the sheet acceptor  80  is in an operative position, the access opening is not accessible. Movement of the sheet acceptor  80  relative the ATM housing  46  is operative to render the access opening accessible. Various components and mechanisms of the sheet acceptor  80  may be accessed for servicing through the access opening. Of course, as can be appreciated, suitable latching mechanisms or other holding devices may be used so as to assure that once the service cover is returned to its closed position, it remains therein until such time as the service cover needs to be opened again for servicing: In alternate embodiments, there may be a second access opening to the interior of the main housing in an opposite side wall. 
   In the exemplary embodiment, the sheet acceptor  80  includes a first mounting site  280  along a first side of the access opening and a second mounting site  282  along a second side of the access opening. The service cover  270  is adapted to be selectively mounted to the first side wall  276  at either the first mounting site  280  or the second mounting site  282 . When the cover  270  is mounted at the first mounting site  280 , the cover is operative to swing away from the access opening in a first direction, indicated by the arrow in  FIG. 16B , and when the cover is mounted at the second mounting site  282 , the cover is operative to swing away from the access opening in the opposite direction, indicated by the arrow in  FIG. 15B . 
   In the exemplary embodiment, the cover includes a first flange  286  at a first end  288  and a second flange  290  at a second end  292 . When the cover is selectively mounted at the first mounting site, and in a closed position, the first flange  286  is adapted to extend into the main housing  274  and the second flange  290  is adapted to extend outside the main housing  274 , as shown in  FIG. 16A . Alternately, when the cover is selectively mounted at the second mounting site  282 , and in the closed position, the second flange  290  is adapted to extend into the main housing  274  and the first flange  286  is adapted to extend outside the main housing. 
   In the exemplary embodiment, a first set of tabs  296  extends from the main housing  274  into the access opening along a first edge thereof. A first set of corresponding slots  297  are disposed adjacent the first flange  286 . A second set of tabs  298  extends from the main housing  274  into the access opening  272  along a second edge thereof. A second set of corresponding slots  300  are disposed adjacent the second flange  290 . When the cover is selectively mounted at the first mounting site  280 , each of the first set of tabs  296  is operatively engaged within one of the first set of corresponding slots  297 . When the cover is selectively mounted at the second mounting site  282 , each of the second set of tabs  298  is operatively engaged within one of the second set of corresponding slots. The operative engagement of a set of tabs in the set of corresponding slots enables the cover to be pivoted with respect to the main housing. Alternately, the tabs and slots are constructed so as to allow the cover to be totally removed from the access opening. In the exemplary embodiment, each of the tabs includes a recessed surface  302  for operatively engaging the cover. To selectively remove the cover, the cover may be lifted slightly to disengage it from the recessed surfaces. Of course this construction is exemplary. 
   To service an ATM comprising the movable sheet acceptor  80 , an access door, such as door  58  may be opened. The sheet acceptor  80  is moved relative to and in supporting connection with the chest portion from an operative position to a service position. The access opening  272  in the main housing  274  is opened by selectively swinging the cover  270  relative the main housing, or alternately, lifting the cover away from the access opening. After performing a service activity, the access opening may be closed by selectively replacing the cover  270  so one of the flanges extends within the main housing and the other flange extends outside the main housing. If the cover were selectively lifted away from the access opening, then closing the access opening also includes operatively engaging one of the set of tabs within the corresponding set of slots. In alternate embodiments, the main housing and/or the access cover may include sensors or other devices operative to indicate the presence or absence of the cover  270 . 
   While the exemplary embodiments include particular structures to achieve the desirable results, those having skill in the art may devise numerous other embodiments with other structures which employ the same inventive principles described herein and which are encompassed by the subject matter as claimed. 
   Thus the exemplary embodiments of the present invention achieve the above stated objectives, eliminates difficulties encountered in the making and use of prior devices, solves problems, and attains the desirable results described herein. 
   In the foregoing description certain terms have been used for brevity, clarity, and understanding. However, no unnecessary limitations are to be implied therefrom because such terms are for descriptive purposes and are intended to be broadly construed. Moreover, the descriptions and illustrations herein are given by way of examples and the invention is not limited to the exact details shown and described. 
   In the following claims any feature described as a means for performing a function will be construed as encompassing any means capable of performing the recited function, and will not be deemed limited to the particular means shown as performing that function in the foregoing description or mere equivalents thereof. 
   Having described the features, discoveries, and principles of the invention, the manner in which it is constructed and operated, and the advantages and useful results attained; the new and useful structures, devices, elements, arrangements, parts, combinations, systems, operations, methods, and relationships are set forth in the appended claims.