Item dispensing system

Details Item dispensing system Item dispensing system

1983-05-03

1985-04-30

Stoner, Jr., Bruce H.

Sheet feeding or delivering

Feeding

Separators

271 91, 271 11, 271108, 271 311, 221211, 221 13, B65H 308, B65H 714, B65H 716

Patent

active

045139571

ABSTRACT:
An item dispensing system is disclosed wherein in a preferred sheet dispensing embodiment, primary and secondary sets of vacuum cups are mounted to one end of a pick arm which is rotated between a stack of sheets and a dispensing path. Initially, a two-way valve is controlled to pass a vacuum from a vacuum source only to one of the primary and secondary sets of vacuum cups. The selected set of suction cups then attempts to vacuum lift and pass a sheet to and along the dispensing path. The failure of a sensor to sense that sheet in the dispensing path within a preselected period of time indicates that the selected set of vacuum cups may have been unsuccessful in vacuum lifting that sheet from the stack due to a poor vacuum seal between the selected set of vacuum cups and that sheet. Such a failure causes a processor to generate a signal to cause the two way valve to apply the vacuum from the vacuum source only to the other one of the primary and secondary sets of vacuum cups.

REFERENCES:
patent: 3617048 (1971-11-01), Albert
patent: 3934869 (1976-01-01), Strobel
patent: 3954260 (1976-05-01), Morello et al.
patent: 3999795 (1976-12-01), Barker
patent: 4146217 (1979-03-01), Barker
patent: 4200277 (1980-04-01), Klenk et al.
patent: 4391439 (1983-07-01), Edstrom

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