Sheet feeding apparatus

Details Sheet feeding apparatus Sheet feeding apparatus

1991-05-07

1992-12-01

Olszewski, Robert P.

Sheet feeding or delivering

Feeding

Separators

271 99, 271171, B65H 308

Patent

active

051674076

ABSTRACT:
Air flows from an air flow forming means are jetted to near the downstream end of a plurality of sheets stacked on a laying plate so as to separate either a uppermost sheet or a bottommost sheet from the remaining sheets. The uppermost sheet or the bottommost sheet is vacuum attracted to a vacuum attracting area defined in a feeding belt by a vacuum attracting box. Based on the size of the sheet, the open suction area uncovered by the stacked sheets in the vacuum attracting area is controlled, thereby enabling the feeding belt to control the power of suction thereof to the sheets. Accordingly, a multiple feeding of the sheets can be prevented due to an excessive power of suction.

REFERENCES:
patent: 3198514 (1965-08-01), Barbera et al.
patent: 4219191 (1980-08-01), Rastorguyeff
patent: 4418905 (1983-12-01), Garavuso
patent: 4469319 (1984-09-01), Robb et al.
patent: 4627606 (1986-12-01), Moore

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