Device for adapting negative pressure in a suction belt feed tab

Details Device for adapting negative pressure in a suction belt feed tab Device for adapting negative pressure in a suction belt feed tab

1995-05-08

1997-12-16

Terrell, William E.

Sheet feeding or delivering

Delivering

By pneumatic conveyor

271196, 271276, 1986891, B65H 2932

Patent

active

056976062

ABSTRACT:
Device for adapting negative pressure in a suction belt feed or supply table of a sheet feeder to operating conditions which vary during sheet conveyance, having at least one endless, revolvingly driven conveyor belt provided with suction openings, and a side alignment device for laterally aligning a respectively foremost sheet of a shingled or overlapping sheet stream, and at least one suction box disposed below a conveying plane, the suction box, in a sheet feeding direction, being subdivided into a plurality of chambers subjectible to negative pressure independently of one another, includes a conveyor belt, a plurality of suction chambers disposed in the conveying plane below the conveyor belt, a common suction union and a swivelable shutoff element for selectively connecting the suction chambers to the suction union.

REFERENCES:
patent: 3715115 (1973-02-01), Grobman
patent: 5133593 (1992-07-01), Eitel et al.
patent: 5241907 (1993-09-01), Dorsam et al.
patent: 5288067 (1994-02-01), Stock

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