Method and apparatus for conveying an imbricated stream of sheet

Details Method and apparatus for conveying an imbricated stream of sheet Method and apparatus for conveying an imbricated stream of sheet

1993-02-08

1994-02-22

Skaggs, H. Grant

Sheet feeding or delivering

Feeding

By means to convey sheet

271237, 271245, 271265, 271197, 271216, 271151, 1986891, B65H 500

Patent

active

052880672

ABSTRACT:
A method and apparatus for adjusting the suction pressure drawn through a conveyor belt which conveys a stream of underlapping sheets to an alignment station where sheets are aligned prior to being fed to a sheet-processing machine. A source of high pressure is coupled to a low pressure suction chamber adjacent the alignment station when the final sheet in the stream reaches the alignment end. The high pressure source rapidly equalizes the pressure with the chamber, thus enabling easy lateral alignment of the final sheet in the stream which has no following underlapping sheets to otherwise block the suction pressure.

REFERENCES:
patent: 4651984 (1987-03-01), Emrich
patent: 4696465 (1987-09-01), Willi
patent: 4765451 (1988-08-01), Labombarde
patent: 5022644 (1991-06-01), Burge
patent: 5133543 (1992-07-01), Eitel et al.
patent: 5160132 (1992-11-01), Hanada

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