B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
226/5, 226/1.1,
B65B 23/02 (2006.01) B65B 5/06 (2006.01) B65B 25/04 (2006.01) B65B 35/50 (2006.01)
Patent
CA 1074746
Abstract of the Invention A case-packing apparatus for assembling packages or trays of fragile objects, such as eggs or fruit, into layer arrays, assemblying the layer arrays into case filling stacks, and depositing the stacks into cases. Packages or trays are transported by a conveyor to a transfer plate on which they are assembled in layer arrays that the transfer plate lifts from the conveyor and deposits sequentially on superposed pairs of opposed retractable support ledges on the opposite inner sides of an adjacent vertically movable stacking cabinet. When a set number of layer arrays has been assembled in the cabinet, the support ledges are retracted sequentially, uppermost first, to cumulatively lower the layer arrays into a solid stack form and lastly to lower the solid stack onto a pair of opposed flexible aprons extending horizontally from the sides of the cabinet under the stack and held taut by bowed flat springs each attached at one end to the corresponding cabinet wall below the upper reach of the extended apron and enveloped by the extended outer reaches of the apron. The aprons are formed of flexible sheet material that is wound in rolls supported on the cabinet for unwinding and winding exten- sion and contraction of the aprons, with unwinding permitting the aprons and springs to move downwardly into a case therebelow and thereby gently lowering the supported stack into the case. The apron and spring are straight and flat when fully extended to permit handling of case filling size stacks with easy retraction of the aprons and springs from between the stacks and case walls. A stack stabilizing plate acts on the top of the uppermost array of packages or trays during the stack assemblying lowering of the layer arrays. For reorientation of trays or other layer arrange- ments when desired for proper stack assembly, a pair of conveyor belts are used for transporting and one belt is driven while the other is stopped to effect pivoting of the layer arrangement thereon, with an elevating cam under the driven belt enhancing the friction of layer engagement by the belt to assure proper pivoting reorientation.
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