Sheet stack pre-feeder

Details Sheet stack pre-feeder Sheet stack pre-feeder

1992-08-21

1993-10-05

Skaggs, H. Grant

Sheet feeding or delivering

Feeding

Separator and conveyor

271 34, 271150, 271153, 271155, B65H 500

Patent

active

052497887

ABSTRACT:
The device for feeding sheet stacks 26 has a guiding device 5, in which a plurality of endless guide belts 18, 19, which guide the sheet stack 26 to a motor-driven sheet feed device 8 arranged on a removal side of the sheet stack. The endless guide belts 18 are arranged in an essentially horizontal stack support surface 4. The essentially vertical, stack-side feed sections of the feed conveyer belts 35 of the sheet feed device 8 are subdivided by articulated rollers 38 of a horizontal articulated shaft 39 arranged in the upper third of the sheet stack 26 into a lower decollation section 33, which is sloped by more than 5.degree. and less than 30.degree. relative to the vertical line, and an upper, more highly sloped feed section 34. To achieve reliable decollation of sheets even in the case of sheets of paper carrying high electrostatic charge, an intermittent drive 75 is provided, which drives the sheet 26' lying on the decollation sections 33 of the feed conveyer belts 35 with pulse-like acceleration steps. In addition to or instead of this, the articulated rollers 38 may be eccentrically mounted on the articulated shaft 39 to cause the sheet stack 26 in contact with them to vibrate during rotation.

REFERENCES:
patent: 2715975 (1955-08-01), Doane et al.
patent: 3894732 (1975-07-01), Muller

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