Pneumatic feed device

Details Pneumatic feed device Pneumatic feed device

1976-04-12

1977-04-19

Blunk, Evon C.

Sheet feeding or delivering

Feeding

Separators

271122, B65H 312

Patent

active

040184340

ABSTRACT:
An endless conveyor belt having a series of perforations is positioned between a vacuum outlet and a carrier having a stack of substantially flat documents. The vacuum is operated only when the perforations in the belt are positioned in front of the vacuum outlet to reduce drag on the belt. When the vacuum is operational, the belt will attract one of the documents from the stack and deliver it to a subsequent processing station. Means are provided for maintaining the documents in spaced relation from the belt when the vacuum is inoperative to preclude premature removal of a document from the stack by frictional contact of the document and the belt. A deflectable roller is also located adjacent the belt which rotates counter to the direction of travel of the belt to preclude the feeding of more than one document at a time by the belt to the subsequent processing station.

REFERENCES:
patent: 3103355 (1963-09-01), Hubbard et al.
patent: 3504909 (1970-04-01), Burkhardt
patent: 3599967 (1971-08-01), Rapparlie et al.
patent: 3773317 (1973-11-01), Kummerer
patent: 3847383 (1974-11-01), Wojtowicz et al.

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