Method and apparatus for sorting randomly positioned items minimizing sorting conveyor movement

摘要

Improved methods and apparatus are provided for sorting and arranging garments in a selected order which have been sequentially placed in an unordered sequence. The garments are identified by a marking affixed to each garment, and each garment is arranged in its identified sequence on a sorting conveyor having a multiplicity of movable carriers each for receiving a garment. Identification signals are rearranged in a preselected order, and a plurality of arranged signals are assigned to each one of a corresponding plurality of pick-off mechanisms positioned along the sorting conveyor. A computer calculates bidirectional movement of the sorting conveyor to minimize conveyor movement for positioning a garment for pick-off in its proper sequence by a respective one of the pick-off mechanisms. The conveyor is driven in a bidirectional mode to properly position the garment, and a pick-off mechanism is activated to remove the garment from the sorting conveyor and position the garment on an unloading conveyor. Each conveyor pick-off apparatus includes a fluid- powered cylinder inclined downward toward the sorting conveyor, and a drive unit for closing the gripper mechanism. The method and apparatus of the present invention are particularly well suited for commercial laundry and industrial uniform rental plant industry, wherein commingled garments are arranged in a selected order for pickup or delivery to customers.