Automatic paper feed device

Details Automatic paper feed device Automatic paper feed device

1988-10-24

1990-05-29

Skaggs, H. Grant

Sheet feeding or delivering

Feeding

Separators

271117, 271122, B65H 306

Patent

active

049289519

ABSTRACT:
An automatic paper feed device includes a first paper feed roller rotating in pressing contact with the upper surface of a sheet stack for feeding upper sheets from the sheet stack by its rotation in a counterclockwise direction, a second paper feed roller located downstream of the first paper feed roller with respect to the paper feeding direction and rotating in a counterclockwise direction for feeding only an uppermost sheet of the sheets fed by the first paper feed roller, a separating roller rotating in a direction opposed to the paper feeding direction while being held in pressing contact with the second paper feed roller for returning the sheets other than the uppermost sheet toward the sheet stack, a first frame rotatably supporting said first paper feed roller and a second frame rotatably supporting said separating roller, a paper feed unit pivotably supported so as to be pivotable in upward and downward directions so that the first paper feed roller descends to a level corresponding to the height of the sheet stack while being held in pressing contact with the upper surface of the sheet stack, and a guide associated with the first and second frames for guiding the copying sheet to a nip portion between the second paper feed roller and the separating roller.

REFERENCES:
patent: 3588106 (1971-06-01), Csaba et al.
patent: 4496145 (1985-01-01), Fukui
patent: 4515358 (1985-05-01), Fukui
patent: 4576371 (1986-03-01), Takahashi et al.
patent: 4801134 (1989-01-01), Yokoyama et al.
patent: 4822023 (1989-04-01), Miyoshi

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