a serpentine dispenser is constructed to eliminate the need for dispensing channel divider walls and slip sheets in product cartons or cartridges containing multiple facing stacks of nested cans . the dispenser construction also enables jam - free feeding of multiple facing stacks of nested cans , and reliable feeding of the cans to a product selection area where the consumer may easily remove a single can if desired . both jam - free feeding of multiple facing stacks of nested cans , and easy removal of a single can , ( or multiple cans ) at the product selection area , is enabled by a variable width dispensing channel connecting the product cartridge and the product selection area . as shown in prior art fig1 a and 2a , dispenser 200 divider walls 230 and slip sheets 210 have been employed when using cartridges 220 packed with cans 1 , 2 that do not nest . when dispensing cans 3 , 4 which are capable of nesting , as in prior art fig1 b and 2b , the use of divider walls 230 in the dispensers 200 , and slip sheets 210 in the cartridges 220 , wastes space and materials within the cartridges 220 , dispensers 200 , and across store shelves . eliminating slip sheets 210 and divider walls 230 allows space to be regained for additional product facings across the full width of product categories on the shelves . eliminating wasted space and packaging elements also creates a significant savings in materials , manufacturing , shipping , and assembly costs . as shown in fig3 , nestable cans 3 , 4 can be shipped inside multiple facing cartons , or cartridges 220 , in a nested condition thereby eliminating slip sheets 210 and saving significant amounts of packaging material and packaging costs . the dispensers 500 for these cartridges 220 have no divider walls 230 . instead the various panels between , and connecting , the left side panel 510 and right side panel 520 are as wide as necessary to accommodate the appropriate numbers of product facings and the cartridge 220 . the width of the dispenser 500 upper loading channel 530 accommodating the cartridge 220 and tolerances to allow easy insertion and removal of the cartridge is indicated by “ w 1 ” in the fig3 . fig3 shows a two facing configuration , but cartridges 220 and dispensers 500 may also be constructed to accommodate three or more cans wide ( i . e . “ three facings ” . . . “ n facings ”). a “ four facings ” embodiment is shown in fig5 - 8 . cans 3 , 4 bulk packed for distribution in a nested condition have a feeding problem into , and through , existing dispenser 200 housings which is solved by the arrangement of the dispenser &# 39 ; s 500 side walls 510 , 520 , in the design shown in fig3 - 8 . fig5 shows a dispenser 500 having a left side wall 510 and right side wall 520 forming an upper channel 530 together with a loading ramp 540 into which a bulk cartridge 220 is inserted . the side walls 510 , 520 are sufficiently far apart to accommodate easy insertion of the packed cartridge 220 by store personnel and provide for jam free rolling of the cans inside the cartridge 220 . this spacing , “ w 1 ” in fig3 , will be at least equal to the outer width of the cartridge 220 plus a small additional amount to allow for ease of insertion . referring now to fig3 and fig6 , as the upper channel 530 drops vertically into the dispenser 500 down chute 550 , and transitions into the lower feed channel 560 , the side walls 510 , 520 of the dispenser 500 recess inwardly to form a down chute 550 and lower feed channel 560 with widths “ w 2 ” and “ w 3 ”, respectively , that are narrower than “ w 1 ”. fig3 and fig6 are front section views through the upper channel 530 and down chute 550 , with a cartridge 220 inserted into the dispenser 500 showing nested cans 3 , 4 issuing therefrom into the dispenser 500 down chute 550 through an upper channel exit port 555 . fig3 shows a two facing arrangement of cans 3 , 4 . fig6 shows an arrangement of “ n ” can facings ( n = 4 in this particular example ) and is shown at the level of the exit port 555 in the upper channel 530 through which the cans 3 , 4 move from the cartridge 220 to the down chute 550 . fig4 and fig7 show the lower portion of the dispenser &# 39 ; s 500 lower feed channel 560 and front - most dispensing area 400 for two different can 3 , 4 facings . fig8 shows a detail view of the lower , front area of the dispenser &# 39 ; s lower feed channel 560 forming a product selection area 400 where individual products may be dispensed to shoppers one at a time . narrowing of the down chute 550 and lower feed channel 560 is accomplished by a variety of means including recessing portions of the housing sidewalls 510 , 520 , as shown in fig3 - 8 . alternatively , otherwise smooth , flat sidewalls can have glide ribbing added to the interior surfaces to create a narrowing effect , or other similar structural strictures can be formed in them or added as surface features . for each size and shape of can 3 , 4 packaged and dispensed , the widths “ w 1 ” ( upper channel 530 ), “ w 2 ” ( down chute 550 ), “ w 3 ” ( lower feed channel 560 ), and “ w 4 ” ( product dispensing area 400 ) of the space between the dispenser 500 sidewalls 510 , 520 are preferably of specific dimensions and tolerances matched to the can size and number of rows of cans being dispensed . the widths “ w 2 ” of the down chute 550 and “ w 3 ” of the lower feed channel 560 are preferably sized to create a space both loose enough for the nested cans 3 , 4 , . . . , “ n ” to roll while remaining in their nested condition throughout the dispenser 500 , but tight enough to prevent them from un - nesting during transit through the down chute 550 and lower feed channel 560 . the width dimensions “ w 2 ” and “ w 3 ”, and tolerances , are very important to the proper function of the dispenser 500 . if the down chute 550 and lower feed channel 560 widths , “ w 2 ” and “ w 3 ” respectively , are too small , the cans 3 , 4 , . . . , “ n ” will not feed into and roll smoothly through the dispenser 500 . if these widths are too large , the cans 3 , 4 , . . . , “ n ” can un - nest early , advance randomly , and jam in the lower feed channel 560 or down chute 550 . preferably , widths “ w 2 ” and “ w 3 ” of the down chute 550 and lower feed channel 560 , respectively , are in the range of “ h ”& lt ;“ w 2 ”& lt ;(“ h ”+“ dn ”) and “ h ”& lt ;“ w 3 ”& lt ;(“ h ”+“ dn ”); where , as shown in fig1 b , “ h ” is the total height of the stack of nested cans , and “ dn ” is the depth to which one can nests into one adjacent can . referring again to fig3 and fig6 , it is further desirable to taper or chamfer 300 the transition between the wider (“ w 1 ”), upper channel 530 exit port and the narrower (“ w 2 ”) down chute 550 such that the cans 3 , 4 , . . . , “ n ” are guided from the cartridge 220 into the down chute 550 without encountering any sharp edges or wall / rib end surfaces that might cause the cans 3 , 4 , . . . , “ n ” to hang up , bind , or otherwise jam . in one embodiment a chamfer angle , α , in the range of 10 to 30 degrees relative to the plane of the dispenser side wall 510 , 520 is preferably used . referring now to fig4 and fig7 - 8 , where the forward - most set of can 3 , 4 , . . . , “ n ” facings has rolled through the lower feed channel 560 and reached the dispensing location 400 at the lower front area of the dispenser 500 , the side walls 510 , 520 widen to the dispenser &# 39 ; s 500 full width (“ w 4 ”). widening of the space , from “ w 3 ” to “ w 4 ”, between the sidewalls 510 , 520 at the dispensing location 400 enables the front - most set , or sets , of cans 3 , 4 , . . . , “ n ” to un - nest for dispensing of individual cans 3 , 4 , . . . , “ n ” to shoppers . this transition 401 between the lower feed channel 560 and the dispensing location 400 is also preferably tapered or chamfered to enable a shopper to replace an unwanted can 3 , 4 , . . . , “ n ”. in other words , preferably “ w 4 ”& gt ;“ h ”+“ dn ”, where , as shown in fig1 b , “ h ” is the total height of the stack of nested cans , and “ dn ” is the depth to which one can nests into one adjacent can . also as shown in fig4 and fig7 - 8 , the front to rear length , “ l ”, of the widened (“ w 4 ”) portion of the dispensing location 400 is preferably greater than the diameter , “ d ”, of the cans 3 , 4 , . . . , “ n ” being dispensed to enable un - nesting of the entire front - most set of cans 3 , 4 , . . . , “ n ”, yet should preferably be less than three times the diameter , “ d ”. if the length , “ l ”, of the widened (“ w 4 ”) dispensing location 400 is greater than two times the can 3 , 4 , . . . , “ n ” diameter , “ d ”, the second row of cans may un - nest as well , as shown in detail in fig8 , behind the front - most set of cans 3 , 4 , . . . , “ n ”. a greater length “ l ” enables the second row of cans 3 , 4 , . . . , “ n ” to un - nest and roll forward individually as the front - most cans 3 , 4 , . . . , “ n ” are singly dispensed to shoppers . as a result the front - most row of cans 3 , 4 , . . . , “ n ” will always be full , or auto - front faced as known in the industry . auto - front facing is preferable as it prevents the appearance of a low stock condition . in other words , as shown in fig4 and fig7 - 8 , the preferred range of lengths , “ l ”, for the widened (“ w 4 ”) dispensing location 400 is expressed as ; d & lt ; l & lt ; 3d ; where “ l ” is the length of the widened dispensing location 400 , and “ d ” is the diameter of a can 3 , 4 , . . . , “ n ” being dispensed . if “ l ” is too short , the front - most row of cans will not properly un - nest for the shopper . if “ l ” is too long , the rows of cans behind the first two can rows will un - nest too early and potentially jam as they roll through the lower feed channel 560 . as was the case at the transition 300 between the upper channel 530 exit port and the narrower down chute 550 , it is also desirable to taper or chamfer 300 the transition between the narrower (“ w 3 ”), lower feed channel 560 and the wider (“ w 4 ”) product selection area 400 such that the cans 3 , 4 , . . . , “ n ” are smoothly guided from the lower feed channel 560 to the wider (“ w 4 ”) product selection area 400 without encountering any sharp edges or wall / rib end surfaces that might cause the cans 3 , 4 , . . . , “ n ” to hang up , bind , or otherwise jam when a shopper chooses to return a can to the dispenser , causing cans to move back toward the lower feed channel 560 . in one embodiment a chamfer angle , α , in the range of 10 to 30 degrees relative to the plane of the dispenser side wall 510 , 520 is preferably used . accordingly , it is to be understood that the embodiments of the invention herein described are merely illustrative of the application of the principles of the invention . reference herein to details of the illustrated embodiments is not intended to limit the scope of the claims , which themselves recite those features regarded as essential to the invention .
a serpentine dispenser for dispensing stacks of nested cans from a cartridge allows cans to be dispensed without slip sheets between individual cans , or internal dispenser walls separating can facings . jam - free dispenser feeding is achieved by constructing a cartridge holding area wider than the dispenser down chute , such that the cartridge may be easily inserted and removed from the dispenser , but cans exiting the cartridge are maintained in a nested stack by the narrower width of the down chute . a lower feed channel that is narrower than the cartridge holding area maintains cans in a nested stack as they are delivered to a product selection area . the product selection area is wider than the lower feed channel so that individual cans may un - nest and be individually selected . in some embodiments , the product selection area is extended to allow two stacks of nested cans to separate , forming a self - facing dispenser .