Patent ID: 7037556

Claim:
A process and apparatus for preparation of no-jam vending machine cards wherein said process and apparatus comprise, in combination, a. a dusting powder machine composed of two separate chambers, each chamber closed one from the other with an endless conveyor belt running through both chambers at a predetermined transit speed and dwell time, a first chamber comprising a dusting powder application chamber for a dusting powder, wherein said dusting powder is applied to said cards by an air-powder stream, a second chamber comprising a dusting powder removal chamber, b. a static electricity/drag co-efficiency test slide unit wherein said unit comprises a card test slide equipped with at least two electric eyes to measure slide passage time and a recording means to record passage time of a test card passage between said electric eyes, and c. said process comprises dusting said vending machine cards with a suitable powder to provide a residual powder layer on said vending machine cards by means of an air-powder stream of said dusting machine to provide a residual powder layer on said cards and testing said vending machine cards having said residual powder layer by means of said static electricity/drag co-efficiency test slide unit wherein said cards meet a slide test time range indicating acceptable residual powder layer on each card tested as a sufficient residual powder layer as means of measuring static electricity/card drag co-efficiency and efficacy of application of said residual powder layer as said static electricity/card drag co-efficiency.