Method of and apparatus for separating and feeding sheets

Details Method of and apparatus for separating and feeding sheets Method of and apparatus for separating and feeding sheets

1989-09-08

1992-02-25

Schacher, Richard A.

Sheet feeding or delivering

Feeding

Separator and conveyor

271 94, 271 98, 271111, 271270, B65H 312

Patent

active

050906763

ABSTRACT:
A sheet separating and feeding apparatus has a separating device and a vacuum-attracting device to separate and feed sheets one by one from piled sheets. The separating device includes a compressed air plenum chamber, and main nozzles, first auxiliary nozzles and second auxiliary nozzles which are provided on the compressed air plenum chamber for causing air to blow to an upper portion of the piled sheets to separate the uppermost sheet from the remaining sheets. The vacuum-attracting device includes a vacuum chamber and an endless belt having a plurality of through holes provided in a part of the belt. The endless belt rotates around the vacuum chamber, and attracts the uppermost sheet which is separated by the separating device, when the through holes intermittently communicate with a negative pressure in the vacuum chamber. The endless belt is driven it different speeds according to the rotational positions of the through holes, such that the rotational speed of the belt is increased until the belt reaches a position for attracting a next sheet after it has fed the uppermost sheet.

REFERENCES:
patent: 4627605 (1986-12-01), Roller
patent: 4635921 (1987-01-01), Thomas
patent: 4699369 (1987-10-01), Zirilli
patent: 4768769 (1988-09-01), Roller
patent: 4887805 (1989-12-01), Herbert

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