Hold-back device for selectively separating sheets fed seriatem

Details Hold-back device for selectively separating sheets fed seriatem Hold-back device for selectively separating sheets fed seriatem

1989-11-15

1991-04-16

Olszewski, Robert P.

Material or article handling

Apparatus for moving intersupporting articles into, within,...

Stack forming apparatus

271213, 271292, B65G 5700, B65H 3132

Patent

active

050077970

ABSTRACT:
A collecting bin for stacking sheets fed seriatem thereto, including an abutment associated with the front edges of the sheets in the area where a stapling device and a sheet-stack removal device are arranged. Above a sheet stack in the collecting bin and upstream of the stapling device, a rotatable shaft is mounted transversely to the sheet-feeding direction and parallel with the upper side of the sheet stack. The shaft is driven by a stepping motor in either direction of rotation. Separating fingers, arranged on the shaft, are selectively lowered onto the sheet stack by shaft rotation to form an inclined feeding surface for subsequently entering sheets, separating such subsequently fed sheets from the sheet stack beneath. When the sheet stack has been removed from the collecting bin, the shaft rotates in the opposite direction in order for separating fingers to deposit the separated sheets in the collecting bin. After the sheets have been deposited, the rotation of the shaft moves the separating fingers until they assume an initial position above the sheet stack.

REFERENCES:
patent: 2414059 (1947-01-01), Powers
patent: 4514128 (1985-04-01), Hedrick
patent: 4541763 (1985-09-01), Chandhoke et al.
patent: 4721229 (1988-01-01), Dempf et al.

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