Patent Publication Number: US-8534948-B2

Title: Dispenser with a cam path

Description:
BACKGROUND 
     Devices exist for dispensing cosmetic, medicinal, food, household, or other type products. Such devices usually consist of an outer housing, a delivery mechanism for dispensing the different types of products, and an applicator. For example, in various industries, devices are employed for applying powder, gel, creams, or lotions. In the cosmetics and personal care industries, devices are used to apply lipstick, lip balm, skin creams, lotions, compact powder, loose powder, and other cosmetic products to portions of the face and body. 
     Typically, these devices have many drawbacks. For example, the product may not be dispensed at a controlled rate, allowing either too little or too much to come out of the device. Another problem is that an applicator on the device may allow product to continue to flow out of the device, once the desired amount of product has been dispensed. For example, the product may leak or spill out of the device, especially when travelling from one location to another for reapplication during the day, resulting in a wasted amount of product and a mess for the user. Accordingly, there remains a need in the art for improved devices. 
     SUMMARY 
     This summary is provided to introduce simplified concepts of dispensers with cam paths, which are further described below in the Detailed Description. This summary is not intended to identify essential features of the claimed subject matter, nor is it intended for use in determining the scope of the claimed subject matter. 
     This disclosure is directed to dispensers with cam paths. The dispenser includes a reservoir for containing a product, a lower valve with at least one aperture, an upper valve having at least one aperture and at least one raised section, and a cam path located on the lower valve. The dispenser also includes a collar with a helical guide slot. The dispenser is selectively guidable in a helical motion along the helical guide slot between an upward position for applying the product and a downward position to store the dispenser. Furthermore, the dispenser is selectively rotatable between a closed position to prevent leakage and an open position for product delivery. 
     This disclosure is directed to another implementation of a dispenser with a cam path located on the lower valve. The dispenser is selectively guidable in a helical motion along the cam path between: an upward slanted position for the dispenser to be in an open state, wherein the at least one aperture in the lower value is selectively alignable with the at least one aperture in the upper valve, and a flat unslanted position for the dispenser to be in a closed state, wherein the at least one aperture in the lower valve is selectively alignable with the at least one raised section in the upper valve. In other implementations, there is a flow-through compressible gasket. 
     This disclosure is directed yet to another implementation of a dispenser having a reservoir for containing a product, the lower valve having at least one aperture and an upper valve coupled to the lower valve, the upper valve having at least one aperture and at least one raised section, and at least two cam paths located on the lower valve. The dispenser further includes at least two pins located on the upper valve, each of the pins to travel against each of the cam path. The dispenser being selectively rotatable along the two cam paths and the two pins between: an open position for the dispenser to deliver the product; and a closed position to seal a delivery passageway. 
     The features, functions, and advantages that have been discussed above or will be discussed below can be achieved independently in various implementations, or may be combined in yet other implementations, further details of which can be seen with reference to the following description and drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The detailed description is set forth with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The use of the same reference numbers in different figures indicates similar or identical items. 
         FIG. 1  is an exploded view of an illustrative dispenser with a cam path according to one implementation. 
         FIG. 2  is a perspective view of an exemplary upper valve illustrating at least one raised sections in an upper valve. 
         FIG. 3  is a perspective view of an exemplary cam path located on a lower valve. 
         FIG. 4  is a perspective view the exemplary cam path for the dispenser of  FIG. 1 . 
         FIGS. 5   a  and  5   b  are cross-sectional views, taken along line A—A of the illustrative dispenser of  FIG. 1 . 
         FIGS. 6   a ,  6   b , and  6   c  are a bottom plan view, a top view, and a perspective view, respectively, of a flow-through compressible gasket. 
         FIG. 7  is an exploded view of another illustrative dispenser with a cam path according to one implementation. 
         FIGS. 8   a  and  8   b  are a perspective view and a side view, respectively, of a cam path on an actuator of  FIG. 7 . 
         FIGS. 9   a  and  9   b  are cross sectional views of the cam path of  FIG. 7 . 
         FIGS. 10   a ,  10   b , and  10   c  are a top plan view, a front perspective view, and a side view respectively, of the illustrative flow-through compressible gasket according to an implementation. 
         FIGS. 11   a  and  11   b  are a side view and a cross-sectional view, respectively taken along line B-B of the illustrative dispenser of  FIG. 7 . 
         FIG. 12  is an exploded view of another illustrative implementation of a dispenser with a cam path. 
         FIG. 13  is perspective view of an upper valve, flow-through compressible gasket, and a lower valve, according to the implementation of  FIG. 12 . 
         FIG. 14  is an exterior view of the illustrative dispenser of  FIG. 12 . 
         FIG. 15  is an exploded view of another illustrative implementation of a dispenser with a cam path. 
     
    
    
     DETAILED DESCRIPTION 
     Overview 
     One implementation of this disclosure is directed towards dispensers with at least one cam path in a rotating motion to dispense product and to prevent leakage of the product. For example, a cosmetic dispenser includes a housing having a reservoir for containing a powdered cosmetic product. The dispenser being selectively guidable in a helical motion along a helical guide slot between: an upward position for the dispenser to expose the applicator and a downward position to retract the dispenser. Furthermore, the dispenser being selectively rotatable in a spiral motion along at least one cam path located on a lower valve between i) an open position for the dispenser to deliver the cosmetic product and ii) a closed position to seal a delivery passageway. 
     In another implementation, a product dispenser includes a cam path located on a lower valve. When the dispenser is selectively rotatable in a spiral motion to an open position to deliver product, a guide pin in an upper valve travels along a cam path in a lower valve, in a downward slant. Also, when the dispenser is selectively rotatable in the spiral motion to the closed position, the guide pin in the upper valve travels along the cam path in the lower valve, in a upward slant to effectively cause a seal by compression. For implementations, the cam path slant upwards may include an open or a closed position and the cam path slant downwards may include an open or a closed position. 
     In yet another implementation, the dispenser includes at least two cam paths located on the lower valve and two pins located on the upper valve that travel against each of the cam paths. The dispenser being selectively rotatable along the two cam paths between: i) an open position for the dispenser to deliver the product; and ii) a closed position to seal a delivery passageway. 
     By way of example and not limitation, dispensers with cam paths described herein may be applied in many contexts and environments. For example, dispensers with cam paths may be implemented for medicinal products, cosmetics and personal care industries, powdered cosmetic products, mineral products, food products, spices, carpet deodorizers, baking soda, and the like. For example, in various industries, devices with cam paths may be employed for applying powdered, gel, creams, or lotion products. In the cosmetics and personal care industries, devices with cam paths may be used to apply lipstick, lip balm, skin creams, lotions, powdered, loose powder, and other cosmetic products to portions of the face and body. 
     Illustrative Flow-Through Dispenser with Helical Actuation 
       FIG. 1  is an exploded view of an illustrative dispenser with helical actuation and a cam path  100  according to one implementation. In this implementation, the dispenser  100  may be selectively rotatable in a spiral motion between an upward position and a downward position. The upward position may be considered to expose an applicator to apply product. While the downward position may be considered to retract the dispenser, which stores the applicator. 
       FIG. 1  represents the illustrative dispenser with the cam path  100  having a sleeve  102  with a ridge, the sleeve  102  covers or goes over the various components of the dispenser  100 . In some instances, the sleeve  102  may be made of clear, substantially opaque, or translucent materials. 
     The dispenser with a cam path  100  includes a L-shape path and an end cap  104  coupled to a lower valve  106 ( a ) having a reservoir for containing product. The L-shape path is a pattern in the sleeve  102 . In some implementations, the lower valve  106 ( a ) may be constructed as a separate piece from the reservoir. While in other implementations, the lower valve may be constructed with an attached reservoir as one piece. The lower valve  106 ( a ) dimensions include but are not limited to, height from at least about 20 mm to at most about 60 mm and diameter from at least 20 mm to at most about 35 mm. The end cap or refillable cap  104  keeps the product in the reservoir. 
     The lower valve  106 ( a ) may include at least one cam path  106 ( b ), a lower guide pin  106 ( c ), and a lower valve seat  106 ( d ). Travelling along the at least one cam path  106 ( b ) is a mating guiding pin (not shown here but in  FIG. 2 , as  204 ). The lower guide pin  106 ( c ) travels along the L-shape guide, moving the lower valve  106 ( a ) in a vertical motion. For example, the lower guide pin  106 ( c ) tracks the L-shape vertical slot of the sleeve  102 . The terms “lower guide pin” and “mating guide pin” are used to illustrate the two pins are different items that perform different functions. Any term may be used to describe these various pins. As previously mentioned, the dispenser being selectively rotatable in a movement between i) an upward position and ii) a downward position for application of the product. 
     As described, the dispenser  100  also includes an upper guide pin  109  and an upper valve  110 . The upper guide pin  109  is longer than the lower guide pin  106 ( c ) and moves in a spiral motion. The upper valve  110  may include an attachment seat  112  that is co-molded together as one piece or may be formed of two separate pieces. The attachment seat  112  may include a plurality of pipes as shown in the figure or alternatively, there may not be any pipes in the attachment seat  112  but would include at least one aperture alternating with at least one or more raised sections. The plurality of apertures in the flow-through compressible gasket  108  is alignable with the plurality of apertures in the lower valve seat  106 ( d ) and with the plurality of apertures in the upper valve  110  for product delivery. 
     The cam path  106 ( b ) located on the lower valve  106 ( a ) provides a mechanism for mating guide pin located on the underside of the upper valve  110  to selectively rotate the dispenser from open to close positions, states, and vice versa to deliver product and to provide a seal. The mating guide pin on the upper valve  110  travels along the cam path  106 ( b ) located on the lower valve, in an upward slant when the dispenser is selectively rotatable in the spiral motion to the closed position. The mating guide pin moving along the cam path  106 ( b ) in this upward slanted position rotates to a closed state for no product delivery. There are at least one raised section in the upper valve that is selectively alignable with the at least one aperture in a lower valve to seal the dispenser in the closed state. 
     The mating guide pin in the upper valve  110  travels along the cam path  106 ( b ) in a downward slant when the dispenser is selectively rotatable in the spiral motion to the open position. The mating guide pin in the cam path in this downward slant position is in the open state, which allows for product delivery. There is at least one or more apertures in the upper valve that selectively aligns with the at least one or more apertures of the lower valve to open the dispenser in the open state. For various implementations, the mating guide pin in the cam path slanted upwards, not slanted, or slanted downwards may include either open, closed, or neutral positions, and vice versa. 
     In some implementations, there is a flow-through compressible gasket  108  to be used with the dispenser. The lower valve  106 ( a ) may include a lower valve seat  106 ( d ) or a mouth of the lower valve to hold the flow-through compressible gasket  108 . The lower valve seat  106 ( d ) includes at least one aperture and at least one or more ridges around the external circumference to form a recessed area. The ridge surrounding the lower valve seat  106 ( d ) provides a mechanism for the flow-through compressible gasket  108  to attach to the lower valve seat  106 ( d ). A more detailed discussion of the flow-through compressible gasket  108  follows in  FIGS. 6   a ,  6   b , and  6   c.    
     In implementations with the flow-through compressible gasket  108 , the mating guide pin travelling along the cam path  106 ( b ) provides a mechanism for the flow-through compressible gasket  108  and the lower valve  106 ( a ) to travel to move the dispenser from open to close states and vice versa. This occurs with the dispenser being selectively rotatable in a spiral motion between i) an open position as the open state and ii) a closed position as the closed state. As previously mentioned, the dispenser being selectively rotatable in the rotational motion between i) the upward position and ii) the downward position, along with this spiral motion for the open and closed positions. 
     In implementations with the flow-through compressible gasket  108 , the mating guide pin located on the underside of the upper valve  110  travels along the cam path  106 ( b ). This provides the mechanism for the flow-through compressible gasket  108  with the lower valve to rotate the dispenser to the open position. The mating guide pin and the cam path  106 ( b ) are in the downward slanted position, when the dispenser is selectively rotatable in the spiral motion to this open position. Here, the flow-through compressible gasket  108  with the lower valve  106 ( a ) in this downward slanted position is in the open state to allow for product delivery. There are at least one or more apertures in the upper valve  110  that selectively aligns with the at least one or more apertures of the lower valve  106 ( a ), along with the downward slant of the cam path  106 ( b ) that decompresses the flow-through compressible gasket  108 , to allow the dispenser to be in the open state. 
     The flow-through compressible gasket  108  with the lower valve  106 ( a ) rotates to the closed position when the mating guide pin in the upper valve  110  travels along the cam path  106 ( b ) in the upward slanted position. The dispenser is selectively rotatable in the spiral motion to the closed position. The cam path  106 ( b ) in this upward slanted position rotates to a closed state for no product delivery. There are at least one raised section in the upper valve  110  that is selectively alignable with the at least one aperture in a lower valve, along with the upward slanted position of the cam path  106 ( b ), which increases the effectiveness of a seal by causing a compression against the flow-through compressible gasket  108 , to seal the dispenser in the closed state. For various implementations, the cam path slanted upwards or downwards may include either open or closed positions and vice versa. The rotation for the spiral motion may be clockwise or counter clockwise for the open or closed positions. 
     As mentioned above, the lower valve  106 ( a ), the flow-through compressible gasket  108 , and the upper valve  110  are capable of being selectively rotatable when the mating guide pin travels along the cam path in the spiral motion to the open position for product delivery. This rotation allows at least one pipe or one aperture in the upper valve  110  being selectively alignable with the at least one aperture in the flow-through compressible gasket  108  and being selectively alignable with the at least one aperture in the lower valve seat  106 ( c ), along with the cam path in the downward slanted position to decompress the flow-through gasket  108 , to operate in the open position to deliver product. This downward slanted position of the cam path  106 ( b ) operates in the open position. 
     This spiral rotation mechanism may range from at least about ten degrees to at most about 359 degrees. In some implementations, the spiral rotation mechanism may range from at least about 15 degrees to at most about 300 degrees. Furthermore, the flow-through compressible gasket  108  allows a controlled rate of product to be dispensed at one time without product being distributed all over the user or creating a mess in a purse or a carrying type device. 
     The compressible gasket  108 , and the upper valve  110  may have shapes that include but are not limited to, substantially circular-shaped, substantially square-shaped, or substantially oval-shaped. The number of apertures in the lower valve seat  106 ( c ), the flow-through compressible gasket  108 , and the upper valve  110  may range from at least about one to at most about five apertures. The size of the apertures in the lower valve seat  106 ( c ), the flow-through compressible gasket  108 , and the upper valve  110  is of a sufficient size and of an adequate opening to allow for product delivery without being plugged. For example, the size of the apertures may range from at least about 1 mm to at most about 6 mm. In one implementation, each aperture is at least about 2.5 mm in size. The configuration of the apertures may range from three apertures positioned at 120 degrees apart from each other. In another implementation, the configuration of the apertures may range from four apertures positioned at 90 degrees apart from each other. The shape, number, and size of the apertures in the lower valve seat  106 ( c ), the flow-through compressible gasket  108 , and the upper valve  110  may be different in relation to each other. 
     The at least one pipe in the attachment seat  112  may range in length from at least about 5 mm to at most about 50 mm and may range in diameter from at least about 1 mm to at most about 7 mm. The number and the diameter size of the pipes and the number and diameter size of the raised sections on the upper valve  110  may be similar or not similar in the number and diameter size of apertures in the flow-through compressible gasket  108  and the lower valve seat  106 ( c ). In an implementation, a similar size diameter for the apertures on the flow-through compressible gasket  108  and pipes on the attachment seat  112  allows for product delivery while having a similar size diameter of the raised sections on the upper valve  110  and with the plurality of apertures in the flow-through compressible gasket  108  prevents product leakage. In other implementations, there may be alternate different mechanisms to deliver product and to prevent product leakage. 
     The lower valve  106 ( a ) may be secured to the end cap  104  and to the upper valve  110 , by, for example, a press-fit, a snap-fit, adhesive, and/or engagement by one or more engagement features. In the illustrated implementation, the lower valve  106 ( a ) may include ribs to couple to the upper valve  110 . 
     Shown in  FIG. 1  is a collar  114  that goes over the sleeve  102  of the dispenser  100 . Shown is a helical spiral guide in the collar  114  that selectively guides the dispenser  100  in a rotational motion between the upward position and the downward position. The dispenser may include the upper guide pin  109  located on the upper valve  110  and the lower guide pin  106 ( c ) located on the lower valve, the upper guide pin  109  being selectively rotatable along the helical guide slot. This spiral motion mechanism may range from at least about one degrees to at most about 359 degrees. In some implementations, the spiral rotation mechanism may range from at least about 15 degrees to at most about 250 degrees. 
     The sleeve  102 , the end cap  104 , the lower valve  106 ( a ), the upper valve  110 , the pipes  112 , and the collar  114  may be constructed of materials including, but not limited to, wood, plastics, polymers, thermoplastics, aluminum, steel, brass, bronze, various metals, composites thereof, or the like. In some implementations, the sleeve  102 , the end cap  104 , the lower valve  106 ( a ), the upper valve  110 , the pipes  112 , and the collar  114  may be made at least partially of a resin such as, for example, acrylonitrile butadiene styrene (ABS), styrene acrylonitrile (SAN), pentachlorothioanisole (PCTA), polypropylene (PP), polyethylene (PE), Polyurethane, combinations thereof, or the like. 
     The flow-through dispenser with helical actuation may include a lock type mechanism to avoid accidentally moving the dispenser into a spiral motion. For example, the dispenser will not selectively rotate from the upward open position to the downward closed position and vice versa, unless a user manually rotates the dispenser. 
     Illustrative Applicator and Cap for Dispenser with Cam Path 
       FIG. 1  shows the flow-through dispenser with cam path  100 , which includes an attachment fixture  116  that is coupled to the attachment seat  112  and the upper valve  110 . The attachment fixture  116  includes at least one aperture selectively alignable with the at least one pipe from the attachment seat  112  for product delivery. The attachment fixture  116  may include at least one aperture that would function as sleeves to go over the pipes on the attachment seat  112  of the upper valve  110 . 
     In implementations with no pipes, the attachment fixture  116  may include at least one aperture that aligns with the at least one aperture in the attachment seat  112 . The aperture may range in number from at least about one to at most about six apertures. The aperture may range in size from at least about 1 mm to at most about 7 mm in diameter. The number and diameter size of the apertures in the attachment fixture  116  may match the number and diameter size of the apertures or pipes in the attachment seat  112 . 
     The attachment fixture  116  is coupled to a bottom of an applicator  118 . The applicator  118  may include but is not limited to, a brush, a sponge, or a powder puff to apply the product. In some implementations, the applicator may be used to apply products including but not limited to, cosmetic powdered products, gel or lotion products, and the like. While features of various illustrative implementations are described, the applicator  118  may be configured in any form suitable for the application of the product contained in the dispenser. For example, the applicator  118  may be constructed in any other suitable shape and size and may have any suitable mass, surface finish, and/or surface treatment desired for a given application. In practice, the applicator  118  may be configured in virtually any desired shape, such as disk-shaped, oval, elliptical, spherical, curvilinear, trapezoidal, or the like. 
     As mentioned, the dispenser  100  is capable of being selectively rotatable in the spiral motion to the upward position and selectively rotatable in the spiral motion to the open position. The upward position allows the applicator  118  to be selectively rotatable raised or exposed to deliver product, while the open position allows product to be dispensed through the applicator  118 . Also, the dispenser  100  is capable of being selectively rotatable in the spiral motion to a downward position and selectively rotatable in the spiral motion to the closed position. This downward position allows the applicator  118  to be selectively retractable for storing the dispenser, not providing a delivery mechanism and the closed position creates a seal to prevent product from being delivered. 
     The flow-through dispenser with spiral actuation  100  may include a removable cap  120  or a cover that is sized and shaped to fit over the top of the brush applicator  118 . In an implementation, the removable cap  120  may snap onto the collar  114 . In another implementation, the removable cap  120  may include threads to screw onto the collar  114  that mates with it. In other implementations, the flow-through dispenser with helical actuation  100  may include a clear plastic cover, a sliding pull up cover, and the like. In this illustration, the dispenser  100  includes the removable cap  120  that encapsulates the brush applicator  118  when the dispenser  100  is not in use. In another implementation, the dispenser  100  may not include a removable cap or cover. 
     The removable cap  120  may include a mirror (not shown) for convenience of the user to have the mirror readily available when applying the product. The mirror may range in thickness from at least about 0.4 mm to at most about four mm. The mirror may be located on the top, the side, or inside the removable cap  120 . In another implementation, the dispenser  100  may not include a mirror. 
     While features of various illustrative implementations are described, in other implementations, the sleeve  102 , the end cap  104 , the lower valve  106 ( a ), the upper valve  110 , the collar  114 , the attachment fixture  116 , the brush applicator  118 , the cap  120 , and the mirror may be configured in any form suitable for the application of the product contained in dispenser  100 . For example, the above items listed may be constructed in any other suitable shape and size and may have any suitable mass, surface finish, and/or surface treatment desired for a given application. In practice, the above items listed may be configured in virtually any desired shape, such as disk-shaped, oval, elliptical, spherical, curvilinear, trapezoidal, or the like. 
       FIG. 2  represents a perspective view of an exemplary upper valve  200 . Shown are at least one or more raised sections  202  in the upper valve  110  for the dispenser  100 . There are at least one or more raised sections  202  alternating with the at least one or more apertures. Shown is at least one mating guiding pin  204  located on the underside of the upper valve  200 . As previously mentioned, the at least one mating guiding pin  204  travels along the cam path  106 ( b ). In implementations, there may be several guiding pins. 
       FIGS. 3 and 4  illustrate the exemplary cam path on the lower valve taken from different views.  FIG. 3  is a perspective view  300  of the exemplary cam path  106 ( b ) located on the lower valve  106 ( a ).  FIG. 4  is a side view  400  of the exemplary cam path  106 ( b ) for the dispenser  100  of  FIG. 1 . In  FIG. 4 , the slanted position is shown from left to right, as slanting upwards for the cam path. In other implementations, the slant may be from right to left, slanting upwards for the cam path. 
     Illustrative Mechanisms Using the Flow-Through Compressible Gasket 
       FIGS. 5   a  and  5   b  are a side view  500  and a cross-sectional view  502 , respectively, taken along line A-A of the illustrative dispenser of  FIG. 1 . The following is a discussion of examples, without limitation, of delivery mechanisms for dispensing the product in the open position and of preventing product leakage in the closed position. The positions may be implemented using a rotation or a reverse rotation operation, whereby the user may operate the dispenser  100  by rotating the dispenser in either a clockwise or a counterclockwise direction. The rotations may move from left to right and right to left. The opened and closed positions may apply to rotations which include but are not limited to, clockwise and/or counterclockwise directions, left and/or right movements, up and/or down motions, and the like. 
     The size of the apertures in the lower valve, the flow-through compressible gasket  108 , and the upper valve  110  is of a sufficient size and of an adequate opening to allow for product delivery without being plugged. For example, the size of the apertures may range from at least about one mm to at most about seven mm. In one implementation, each aperture is at least about 2.5 mm in size. 
     The configuration of the apertures may range from two or three apertures positioned at 120 degrees apart from each other. In another implementation, the configuration of the apertures may range from four apertures positioned at 90 degrees apart from each other. Yet in another implementation, there may be one aperture located in a center or off-center of the lower valve, the flow-through compressible gasket, or the upper valve. The apertures may be located at angles ranging from about 45 degrees apart to about 180 degrees. 
     The number of apertures in each element may range from at least one aperture to about four apertures. As mentioned above, the number of raised sections may alternate with the number of apertures in the lower valve or the upper valve. 
     The shape, size, and number of the apertures in the lower valve, the flow-through compressible gasket  108 , and the upper valve  110  may be different in relation to each other. For example, there may be one aperture in the flow-through compressible gasket and two apertures in each of the upper valve and the lower valve. Furthermore, the shape of the aperture(s) in the flow-through compressible gasket may be circular shape, in the lower valve may be oval shape, and in the upper valve trapezoid shape. Any combination of shapes, size, and number of apertures are possible. 
     Illustrative Flow-Through Compressible Gasket 
       FIGS. 6   a ,  6   b , and  6   c  are a bottom view, a top plan view, and a perspective view respectively, of an illustrative flow-through compressible gasket  108  according to one implementation.  FIG. 6   a  illustrates the flow-through compressible gasket  600  having a substantially disk-shaped body  602  with a top raised center section on a top side  604 . The top raised center section  604  may be substantially circular-shape, substantially square-shape, or substantially oval-shape. In this illustration, the top raised center section  604  is substantially circular-shape. The top center-raised section  604  may correspond to a depression on the mating side, the depression located on either the lower valve or the upper valve. 
       FIG. 6   a  shows the at least one aperture  606  located on the substantially disk-shaped body  602 . The at least one aperture  606  aligns with the at least one aperture of the lower valve  106  and/or upper valve  110  or in some implementations with the plurality of pipes in the upper valve to deliver the powdered product. The apertures  606  in the flow-through compressible gasket  600  may have shapes that includes but are not limited to, substantially circular-shape, substantially square-shape, or substantially oval-shape. Shown are apertures  606  that are substantially circular-shape. 
     The size of the at least one aperture  606  are of a sufficient size to allow for product delivery without being plugged. The size of the aperture is of an adequate opening to allow the powdered particles to travel through at least one aperture  606 . For example, the size of the apertures  606  in the flow-through compressible gasket  600  may range from at least about one mm to at most about seven mm. In one implementation, the aperture  606  is at least about 2 mm diameter in size. 
     The number of the at least one aperture  606  are of a sufficient number to allow for product delivery in the open position, but is somewhat dependent on the size of the apertures. In an implementation, there may be three apertures as shown. In other implementations, the apertures may include but is not limited to, from at least about one aperture to at most about four apertures. 
     The arrangement of the apertures  606  may be in a triangular configuration as shown. In another implementation, the arrangement may be in various configurations, including but not limited to a square, a circular or hour-glass configuration. 
     The substantially disk-shaped body  602  includes a circular ring  608  on each side of the disk-shaped body  602 . In one implementation, a first circular ring surrounds the apertures and is to couple to the lower valve  106  on one side and a second circular ring surrounds the apertures and is to couple to the upper valve  110  on the outer side. 
     The flow-through compressible gasket  600  includes an outer perimeter having a plurality of flat sides  610  and a plurality of semicircular sides  612 , alternating, on the substantially disk-shape body. The plurality of semicircular sides  612  holds the flow-through compressible gasket  600  secure against the upper valve  110  or the lower valve  106  upon actuation in the various implementations. The plurality of flat sides  610  may apply to any sides of the substantially disk-shaped body  602 . For example, the flat sides  610  may include, but is not limited to three sides arranged in a triangle type formation or configuration. The semicircular side  612  may apply to any sides of the substantially disk-shaped body  602 . 
     The semicircular sides  612  arranged in a triangle type formation or configuration. In an implementation, the substantially disk-shaped body  602  may include alternating flat sides  610  with alternating semicircular sides  612 . The number of semicircular sides and flat sides may each range from at least about one to the most about four. 
       FIG. 6   b  shows the other side of the substantially disk-shaped body  602  of the flow-through compressible gasket. The center raised section  614  in the flow-through compressible gasket  600  may be substantially squared-shape. The center-raised section  614  may have shapes that includes but are not limited to, substantially circular-shape, substantially square-shape, or substantially oval-shape. The center-raised section  614  may correspond to a depression on the mating side, the depression located on either the lower valve or the upper valve. 
       FIG. 6   c  shows a perspective view of the flow-through compressible gasket  600 . The flow-through compressible gasket  600  is made of a material capable of having elastomeric properties. The materials include but are not limited to, a thermoplastic elastomer (TPE), a thermoplastic polymer, a polyvinyl chloride, a polyurethane, polyester copolymer, styrene copolymer, olefin, ethylene acrylic, chlorinated polyethylene, chlorosulfonated polyethylene, fluorocarbon, rubber, while in other implementations, the elastomeric material may comprise a relatively pliable or gel-like material such as butyl rubber, silicone, butadiene rubber, neoprene, nitrile, fluorosilicone, styrene-butadiene rubber (SBR), or the like. 
     While features of various illustrative implementations are described, in other implementations, the flow-through compressible gasket  600  may be configured in any form suitable for the application of the product contained in the dispenser. For example, the flow-through compressible gasket  600  may be constructed in any other suitable shape and size and may have any suitable number of apertures, size of apertures, shape of apertures desired for a given application. The size, number, and shape of the apertures on the flow-through compressible gasket  600  may vary between implementations. Fabrication of the dispenser and the flow-through compressible gasket  600  may be accomplished through a separate manufacturing process, a co-molding process, or any other suitable production process. 
     An Illustrative Dispenser with a Cam Path in an Actuator 
       FIG. 7  is an exploded view of another implementation of a dispenser with a cam path. The following is a discussion of examples, without limitation, according to one implementation.  FIG. 7  illustrates the dispenser having a cam path in an actuator  700 . An actuator selectively moves the dispenser in a spiral motion between an upward position and a downward position. A vertical movement is guided by a slot in an actuator and a flange in a slide. In this implementation, the dispenser  700  may also rotate to an open position and a closed position. A mating guide pin in the lower valve travels along the cam path in the actuator. This rotation causes at least one aperture in the flow-through compressible gasket with an hour-glass shape to be alignable with at least one aperture in an upper valve and/or an lower valve, and the mating guide pin and the cam path are in a downward slanted position to decompress the flow-through compressible gasket, to define a product passageway. Furthermore, the dispenser  700  may rotate to a closed position. The mating guide pin travels along the cam path located in the actuator, the rotation causes the at least one aperture in the flow-through compressible gasket with the hour-glass shape to be alignable with a smooth area or raised sections of the lower valve and/or the upper valve, and the mating guide pin and the cam path are in an upward slanted position. This position increases the effectiveness of a seal by causing a compression against the flow-through gasket to provide a seal to prevent product loss. For ease of convenience, the term “flow-through compressible gasket with an hour-glass shape” may be used interchangeably with a shortened version of “flow-through compressible gasket H”. 
       FIG. 7  represents the illustrative dispenser  700  having a housing  702  with a reservoir to contain the product and an end cap  704 . The housing  702  has a ridge at the bottom, the reservoir may be refillable with product by removing the end cap  704  to refill product. In some instances, the housing  702  may be made of clear, substantially opaque, or translucent materials. In an implementation, the housing and the end cap may be molded together. When the housing and the end cap are molded together, the reservoir is filled at the top of the housing. 
     The dispenser  700  includes a slide  706  that covers the various components of the dispenser. The slide includes a flange  706 ( a ) to be coupled to a slot, that allows the dispenser to selectively move in a vertical movement between an upward position and a downward position. In another implementation, the slide  706  selectively moves with a sliding motion to an upward position to expose an applicator brush to apply product and to a downward position to retract the applicator brush. A user selectively rotates the slide  706  as it travels along the flange  706 ( a ) in conjunction with the slot along a vertical motion to the upward position. This vertical action moves an upper portion of the dispenser upwards, by rotating the applicator upwards for applying the product. Furthermore, the user selectively rotates the slide  706  as the dispenser travels along the flange  706 ( a ) in conjunction with the slot through the vertical motion to the downward position to retract the applicator brush. 
     The dispenser includes a lower valve or an inner valve  708 , a flow-through compressible gasket with an hour-glass shape  710 , and an upper valve or an outer valve  712 . The lower valve  708  may be secured to the housing  704  and to the slide  706 , by, for example, a press-fit, a snap-fit, adhesive, and/or engagement by one or more engagement features. In the illustrated implementation, the lower valve  708  may include a mating guiding pin  708 ( a ). The lower valve  708  also includes a center-raised section that has a plurality of smooth areas alternating with at least one aperture. In some implementations, the dispenser does not include the flow-through compressible gasket with the hour-glass shape. 
     Furthermore, the dispenser  700  includes an actuator  714  with at least one or more cam path(s)  714 ( a ) and at least one or more slot(s)  714 ( b ), an aperture and at least one or more ridges around the external circumference of the actuator  714 . The one or more cam path(s)  714 ( a ) allow the at least one or more mating guiding pin(s)  708 ( a ) of the lower valve  708  to travel along the one or more cam path(s)  714 ( a ). The one or more slot(s)  714 ( b ) and the flange  706 ( a ) guide the vertical movement of the dispenser. 
     An upper assembly may include the actuator  714  and the upper valve  712 . The actuator  714  may include at least one post to help define the product delivery passageway. The actuator  714  may be secured to the upper valve  712  including but not limited to, a press-fit, a snap-fit, adhesive, and/or engagement by one or more engagement features. Also, the actuator  714  may include at least one or more ridges around the external circumference for ease of convenience for the user to rotate the actuator. 
     The following is a discussion of examples, without limitation, of delivery mechanisms for dispensing the product in the open position and of preventing product leakage in the closed position, as the mating guide pin  708 ( a ) travels along the cam path  714 ( a ) in the actuator. The examples may be implemented using a rotation or a reverse rotation operation, a spiral motion or a reverse spiral motion, whereby the user may operate the dispenser  700  by moving the actuator  714  or the slide  706 , causing the mating guide pin  708 ( a ) to travel along the cam path  714 ( a ) in either a clockwise or a counterclockwise direction. The rotations may move from left to right and/or right to left. The opened and closed positions may apply to rotations which include but are not limited to, clockwise and/or counterclockwise directions, left and/or right movements, up and/or down motions, and the like. 
     In implementations with the flow-through compressible gasket  710 , the mating guide pin  708 ( a ) travelling in the cam path  714 ( a ) provides a mechanism for the apertures in flow-through compressible gasket  710  and the apertures in the lower valve  708  to align with the apertures in the upper valve  712  to move the dispenser from open to close states and vice versa. This occurs with the dispenser being selectively rotatable in a spiral motion between i) an open position as the open state and ii) a closed position as the closed state. As previously mentioned, the dispenser being selectively rotatable in the vertical motion between i) the upward position and ii) the downward position, along with this spiral motion for the open and closed positions. 
     In implementations with the flow-through compressible gasket  710 , the mating guide pin  708 ( a ) in the lower valve  708  travels along the cam path  714 ( a ) in the downward slanted position. The mating guide pin  708 ( a ) in the cam path  714 ( a ) travels to a downward slant when the dispenser is selectively rotatable in the spiral motion to the open position. Here, the flow-through compressible gasket  710  with the lower valve  708  in this downward slanted position is in the open position to allow for product delivery. The spiral motion to the open position may cause the lower valve  708  to move further apart from the upper valve  712 . For example, the at least one or more apertures in the upper valve  712  selectively aligns with the at least one or more apertures of the lower valve  708  and with at least one or more apertures in the flow-through compressible gasket. This alignment along with the downward slant of the mating guiding pin  708 ( a ) and the cam path  714 ( a ) create the open position, the downward slant of the cam path  714 ( a ) decompresses the flow-through compressible gasket  710 , to allow the dispenser to be in the open state. The cam path  714 ( a ) increases the effectiveness of the open position by decompressing the flow-through compressible gasket  710  to allow product delivery. 
     The mating guiding pin  708 ( a ) in the lower valve  708  travels along the cam path  714 ( a ) in the upward slanted position when the dispenser is selectively rotatable in the spiral motion to the closed position. The cam path  714 ( a ) in this upward slanted position rotates to a closed position for no product delivery. The spiral motion to the closed position may cause the lower valve to move closer to the upper valve. For example, the at least one raised section in the upper valve  712  is selectively alignable with the at least one aperture in a lower valve and with the aperture in the flow-through compressible gasket. This creates the closed position with the alignments along with the upward slanted position of the cam path  714 ( a ), the cam path increases the effectiveness of the closed position by causing a compression against the flow-through compressible gasket  710 . This compression helps provide a seal for the dispenser in the closed state. For various implementations, the cam path slanted upwards or downwards may include either open or closed positions and vice versa. The rotation for the spiral motion may be clockwise or counter clockwise for the open or closed positions. 
     The spiral motions may cause the mating guide pin  708 ( a ) in the lower valve  708  to travel along the cam path  714 ( a ). This may cause the upper valve  712  to rotate upwards, to move away from the lower valve  708  in a clockwise or counterclockwise rotation. In another implementation, the spiral motion causing the mating guide pin  708 ( a ) in the lower valve to travel along the cam path, may involve rotation of the upper valve or lower valve relative to each other. In another implementation, the spiral motion causing the mating guide pin  708 ( a ) to travel along the cam path, may involve rotation of the upper valve while the lower valve remains stationary. In another implementation, the spiral motion causing the mating guide pin  708 ( a ) to travel along the cam path, may involve rotation of the lower valve, while the upper valve remains stationary. 
     At least one aperture in the lower valve  708 , the flow-through compressible gasket H  710 , and the upper valve  712  may have shapes that include but are not limited to, substantially hour-glass shaped, substantially disk-shape, substantially circular-shape, substantially square-shape, substantially oval-shape, or substantially trapezoid shape. 
     The size of the apertures in the lower valve  708 , the flow-through compressible gasket H  710 , and the upper valve  712  is of a sufficient size and of an adequate opening to allow for product delivery without being plugged. For example, the size of the apertures may range from at least about 1 mm to at most about 5 mm. In one implementation, each aperture is at least about 2 mm in size. 
     The number of apertures in the lower valve  708 , the flow-through compressible gasket H  710 , and the upper valve  712  may range from at least one aperture to about four apertures. 
     The shape, size, and number of the apertures in the lower valve  708 , the flow-through compressible gasket H  710 , and the upper valve  712  may be different in relation to each other. For example, there may be one aperture in the flow-through compressible gasket and two apertures in each of the lower valve and the upper valve. Furthermore, the shape of the aperture(s) in the flow-through compressible gasket may be substantially hour-glass shape, in the lower valve may be disk-shape, and in the upper valve trapezoid shape. Any combination of shapes, size, and number of apertures are possible. 
     The plurality of raised areas in the lower valve  708  and/or upper valve  712  are alignable with the at least one aperture in the flow-through compressible gasket H  710 , along with the upward slanted position of the cam path  714 ( a ), the cam path  714 ( a ) increases the effectiveness of a seal by causing a compression against the flow-through compressible gasket  710 , to provide a seal for the dispenser to be in the closed position. This closed position prevents movement of the product along a delivery passageway due to the seal. Furthermore, the flow-through compressible gasket H  710  allows a controlled rate of product to be dispensed at one time without loose powder being distributed all over the user. 
     The end cap  702 , the housing  704 , the slide  706 , the lower valve  708 , the upper valve  712 , and the actuator  714  may be constructed of materials including, but not limited to, wood, plastics, polymers, thermoplastics, composites thereof, or the like. In some implementations, the described components may be made at least partially of a resin such as, for example, acrylonitrile butadiene styrene (ABS), styrene acrylonitrile (SAN), pentachlorothioanisole (PCTA), polypropylene (PP), polyethylene (PE), polyurethane, combinations thereof, or the like. 
       FIG. 7  shows the dispenser  700  has an applicator. The applicator includes an applicator holder  716  coupled to the applicator  718 . The applicator holder  716  serves as a base to hold a brush applicator  718  or as a base for a sponge or powder puff applicator. 
     In some implementations, the applicator may include a sponge which may include at least one aperture. The apertures may range in number from at least about one to at most about six apertures. The apertures in the sponge applicator (not shown) may range in size from at least about 1 mm to at most about 4 mm in diameter. 
     The dispenser  700  includes a removable cap  720  or a cover that is sized and shaped to fit over the top of the applicator  718 . In an implementation, the removable cap  720  may snap onto the housing  704 . In yet another implementation, the removable cap  720  may include threads to screw onto the housing  704  that mates with it. In some instances, the removable cap  720  may be made of clear, substantially opaque, or translucent materials. In other implementations, the dispenser  700  may include a clear plastic cover, a sliding pull up cover, and the like. In this illustration, the dispenser  700  includes the removable cap  720  that encapsulates the applicator  718  when the dispenser  700  is not in use. In another implementation, the dispenser may not include a removable cap or cover. 
     The removable cap  720  may include a mirror (not shown) for convenience of the user to have the mirror readily available when applying the product. The mirror may range in thickness from at least about two mm to at most about eight mm. In various implementations, the mirror may be coupled to the removable cap by adhesive, press fit, snap fit, one or more ribs or barbs, or any other suitable fastening means. The mirror may be located on the top, the side, or inside the removable cap. In another implementation, the dispenser  700  may not include a mirror. 
     While features of various illustrative implementations are described, in other implementations, the end cap  702 , the housing  704 , the slide  706 , the lower valve  708 , the upper valve  712 , the actuator  714 , the applicator holder  716 , the applicator  718 , and the cap  720  may be configured in any form suitable for the application of the product contained in the dispenser  700 . For example, the above items listed may be constructed in any other suitable shape and size and may have any suitable mass, surface finish, and/or surface treatment desired for a given application. In practice, the above items listed may be configured in virtually any desired shape, such as disk-shaped, oval, elliptical, spherical, curvilinear, trapezoidal, or the like. 
       FIGS. 8   a  and  8   b  are a perspective view and a side view  800 , respectively, of the cam path  714 ( a ), slots  714 ( b ) on the actuator  714  of  FIG. 7 . The discussion of the cam path  714 ( a ), slots  714 ( b ) on the actuator  714  were discussed in details in  FIG. 7 . 
       FIGS. 9   a  and  9   b  are cross sectional views  900  of the cam path  714 ( a ) of  FIG. 7 .  FIG. 9   a  shows the guiding pin in the cam path  714 ( a ) is in the slanted downward position, causing the dispenser to be in the open position. Shown in  FIG. 9   a , the guide pin in the cam path  714 ( a ) provides a decompression on the flow-through compressible gasket  710  for the open position. In  FIG. 9   b , the guide pin in the cam path  714 ( a ) is in the slanted upward position, causing the dispenser to be in the closed position. In  FIG. 9   b , the guide pin in the cam path provides compression on the flow-through compressible gasket  710  for the closed position. Thus, the cam path  714 ( a ) increases the effectiveness of the seal by this compression. 
     Flow-Through Compressible Gasket H 
       FIGS. 10   a ,  10   b , and  10   c  are a front perspective view, a top plan view, and a side elevation view, respectively, of the flow-through compressible gasket. In these figures, the flow-through compressible gasket H includes apertures having a substantially hour-glass shape surrounded by circular rings on the top and the bottom sides of the gasket. 
     The flow-through compressible gasket with the hour-glass shape is made of a material capable of having both thermoplastic and elastomeric properties, including but not limited to a thermoplastic elastomer (TPE), a thermoplastic rubber, a thermoplastic polymer, an elastomer, and the like. In some implementations, the elastomeric material may comprise polyurethane, polyester copolymer, styrene copolymer, olefin, ethylene acrylic, chlorinated polyethylene, chlorosulfonated polyethylene, fluorocarbon, while in other implementations, the elastomeric material may comprise a relatively pliable or gel-like material such as butyl rubber, silicone, butadiene rubber, neoprene, nitrile, fluorosilicone, styrene-butadiene rubber (SBR), or the like. 
       FIG. 10   a  illustrates a front perspective view of the flow-through compressible gasket with the hour-glass shape.  FIG. 10   a  illustrates how the flow-through compressible gasket H includes a substantially circular-shaped body with a raised center section. The body and the raised center section may be in other configurations and shapes, including but not limited to substantially circular-shaped, substantially square-shaped or substantially oval-shaped. 
     The flow-through compressible gasket with the hour-glass shape includes at least one aperture located on the substantially circular-shaped body. The at least one aperture aligns with the at least one aperture of the lower valve and the at least one aperture of the upper valve to deliver the product. The at least one aperture in the flow-through compressible gasket with the hour-glass shape may have shapes that includes but are not limited to, substantially circular, substantially square-shaped, or substantially oval-shaped. In this illustration, the at least one aperture is substantially hour-glass shape. 
     The number of the at least one aperture is of a sufficient number to allow for product delivery, but is dependent on the size of the aperture. In an implementation, the at least one aperture may include two apertures. In other implementations, the at least one aperture may include but is not limited to, from at least one aperture to at most four apertures. The arrangement of the at least one aperture may be of a hour-glass shape formation with two apertures as shown in  FIG. 10   b  or a circular shaped with three apertures at least 2 mm diameter. 
       FIG. 10   c  illustrates a side view of the flow-through compressible gasket with the hour-glass shape. The flow-through compressible gasket with the hour-glass shape includes a first circular ring connecting to the substantially circular-shaped body on one side and a second circular ring connecting to the substantially circular-shaped body on the other side. 
     While features of various illustrative implementations are described, in other implementations, the flow-through compressible gasket with the hour-glass shape may be configured in any form suitable for the application of the product contained in the dispenser  800 . For example, the flow-through compressible gasket with the hour-glass shape may be constructed in any other suitable shape and size and may have any suitable number of apertures, size of apertures, shape of apertures desired for a given application. Fabrication of the dispenser and the flow-through compressible gasket with the hour-glass shape may be accomplished through a separate manufacturing process, a co-molding process, or any other suitable production process. Fabrication of dispenser and flow-through compressible gasket with the hour-glass shape may be accomplished through a separate manufacturing process, a co-molding process, or any other suitable production process. 
     Illustrative Delivery Mechanism for Flow-Through Compressible Gasket with Hour-Glass Shape 
       FIG. 11   a  is a side view and  FIG. 11   b  is a cross-sectional view taken along line B-B of the illustrative flow-through dispenser of  FIG. 7 . 
     The following is a discussion of examples, without limitation, of delivery mechanisms for dispensing a product in the open position and of preventing product leakage in the closed position. The examples may be implemented using a rotation or reverse rotation operation, whereby a user may operate the dispenser by moving the mating guide pin relative to the cam path along with the lower valve in either a clockwise or a counterclockwise direction. However, in other implementations, any suitable delivery mechanism may be used. 
     In one example, the actuator serves as an operating mechanism to allow product delivery in the open position. The rotation of the actuator to the open position causes the mating guide pin in the lower valve to travel along the cam path. For example, at least one aperture of the flow-through compressible gasket H with the hour-glass shape to align with the at least one aperture in the lower valve or the upper valve, such that the product is transported through this product delivery passageway. The product is dispensed from the reservoir in the housing through to the applicator. 
     In one example, the actuator serves as an operating mechanism to prevent product leakage causes the mating guide pin in the lower valve to travel along the cam path. For example, the at least one or more raised sections in the upper valve or the lower valve aligns with the at least one or more apertures in the flow-through compressible gasket with hour-glass shape aligns to create no delivery passageway. Furthermore, the mating guide pin travelling in the cam path is in a slanted upward position, the cam path creating compression against the flow-through compressible gasket with hour-glass shape for the closed position. In this closed position, the cam path in the actuator provides a seal by aligning smooth areas or raised sections on the upper valve and/or the lower valve to the at least one aperture of the flow-through compressible gasket H, along with the compression. Thus, the closed position prevents product leakage by sealing the product delivery passageway. 
     In some implementations, the rotation mechanism may include a rotation at least about 1 degrees to at most about 359 degrees to the open position along the cam path. In other implementations, the rotation mechanism may include a rotation at a minimum of at least about 5 degrees to at most about 350 degrees along the cam path. Another example for delivery mechanism for dispensing the product may be a rotation of at least about 180 degrees, relative to a sufficient number of the at least one aperture and a sufficient size of the at least one aperture in the flow-through compressible gasket H. The delivery mechanism include but is not limited to, clockwise or counter clockwise rotations, left or right movements, opened or closed positions, and the like. 
     Actuation may also occur by turning, depressing, sliding, tilting, or otherwise manipulating an outer cover, a knob on an outer cover, and/or by any other suitable dispensing mechanism. In an implementation, a knob on the outer cover allows product delivery. This may occur by sliding the knob to align the at least one aperture in the flow-through compressible gasket with a at least one aperture in the outer cover. However, in other implementations, any suitable delivery mechanism may be used. 
     Illustrative Dispenser with Two Cam Paths 
       FIGS. 12-15  illustrate other implementations of dispenser with cam paths.  FIG. 12  is an exploded view of another illustrative implementation of a dispenser with at least two cam paths. It is understood these illustrative dispensers with cam paths have features similar to the components and features of the dispensers as discussed in  FIGS. 1 and 7 . However, the following descriptions will focus on features that are different for other implementations of the dispensers with cam paths. 
     In this implementation of  FIG. 12 , the dispenser  1200  includes an o ring seal  1202 . The o-ring seal  1202  is illustrated as being generally ring or circular-shape. However, the o-ring seal  1202  may be configured in virtually any desired shape, such as oval, elliptical, spherical, curvilinear, trapezoidal, or the like. The o-ring seal  1202  is snapped fit to the lower valve to the housing to form a seal. The o-ring seal  1202  may be made of materials including but not limited to, nitrile rubber, Buna-N, synthetic rubber copolymer of acrylonitrile and butadiene, thermoplastic elastomer (TPE), silicon, and the like. 
     The dispenser includes a lower valve  1204 , which may include one or more apertures to transport product from the reservoir in the housing to an applicator for product delivery. The lower valve  1204  also includes one or more raised sections alternating with the one or more apertures. The one or more raised sections include but are not limited to, made of the same material as the lower valve  1204 , formed of over molded thermoplastic elastomeric material, made of a plurality of raised bumps, made of a small layer, or made of thermoplastic elastomeric rings surrounding the bumps or the raised sections. 
     The lower valve  1204  includes at least one or more cam paths  1206 . In an implementation, there are two cam paths on the lower valve, located about 180 degrees relative to each other. There are mating guide pins (not shown) located in the upper valve  1208  that fits along the cam paths to limit the amount of rotation (similar to  FIG. 2 ). For example, the amount of spiral rotation may be limited to less than about 180 degrees. In other implementations, the amount of rotation may be greater than about 180 degrees to about 250 degrees. 
       FIG. 13  is perspective view  1300  of an upper valve, flow-through compressible gasket, and a lower valve, according to the implementation of  FIG. 12 .  FIG. 14  is an exterior view  1400  of an illustrative dispenser of  FIG. 12 . 
     Illustrative Dispenser with Cam Paths 
       FIG. 15  is an exploded view of another illustrative implementation of a dispenser  1500  with a cam path. It is understood this illustrative dispenser with cam path has features similar to the components and features of the dispensers as discussed in  FIGS. 1 ,  7  and  12 . However, the following descriptions will focus on features that are different for other implementations of the dispensers with cam paths. 
     In this implementation of  FIG. 15 , the dispenser includes a lower valve  1502 , a first guide pin  1503 , and a first cam path  1504 , both shown on the lower valve. The dispenser may or may not include a flow-through compressible gasket  1506 . The dispenser also includes a second guide pin  1505  and a second cam path  1508 , both are located on an upper valve  1510 . 
     There are two types of spiral motions that occur with the dispenser  1500 . In one implementation, the first guide pin  1503  in the lower valve  1502  travels along the second cam path  1508  in the upper valve  1510  in an upward rotation. The spiral upward motion in the second cam path  1508  occurs in conjunction with a helical motion along the helical guide slot  1512 . In another implementation, the second guide pin  1505  in the upper valve  1510  travels along the first cam path  1504  in the lower valve  1502  in a downward rotation. The spiral downward motion in the first cam path  1504  occurs in conjunction with the helical motion along the helical guide slot  1512 . 
     Conclusion 
     Although the invention has been described in language specific to structural features and/or methodological acts, it is to be understood that the invention is not necessarily limited to the specific features or acts described. Rather, the specific features and acts are disclosed as illustrative forms of implementing the invention.