Process and apparatus for the singling of the sheets of a paper

Details Process and apparatus for the singling of the sheets of a paper Process and apparatus for the singling of the sheets of a paper

1980-04-10

1982-11-30

Stoner, Jr., Bruce H.

Sheet feeding or delivering

Delivering to stack and feeding therefrom

With sheet sensor for selective location

271 12, 271 94, 271 98, 271106, B65H 130, B65H 312

Patent

active

043613179

ABSTRACT:
A process and apparatus for singling of sheets of a paper stack in a magazine disposed over a suction box having suction openings in a concave surface thereof transversely positioned relative to conveyance direction of a perforated endless conveyance band disposed between the stack and the suction box. A vacuum is applied to the suction box so that the lowest sheet of the stack is sucked down onto the conveyance band and conforms to the concave surface of the suction box. The lowest sheet is transported on the conveyance band, and the vacuum is switched off just before the suction openings are uncovered, at which time a blast of air is introduced into the suction box so that the next sheet of the stack is not sucked onto the conveyance band until the last sheet is removed from between the stack and the suction box. Preferably, air is injected between the lowest sheet and the next sheet from in front to prevent a vacuum formation therebetween. A second magazine system supplies the sheets of paper to the stack.

REFERENCES:
patent: 3258262 (1966-06-01), Rehm
patent: 3312464 (1967-04-01), Rehm
patent: 3406963 (1968-10-01), Goss
patent: 3612511 (1971-10-01), Godlewski
patent: 3620526 (1971-11-01), Iles et al.
patent: 3844551 (1974-10-01), Morrison
patent: 3870294 (1975-03-01), Donner
patent: 3880419 (1975-04-01), Swanson
patent: 3907278 (1975-09-01), Jaton
patent: 3973768 (1976-08-01), Shannon
patent: 4081181 (1978-03-01), Crowe et al.

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