Sheet feeding apparatus

Details Sheet feeding apparatus Sheet feeding apparatus

1992-12-10

1993-10-05

Bollinger, David H.

Sheet feeding or delivering

Feeding

By means to convey sheet

271267, B65H 702

Patent

active

052497950

ABSTRACT:
The present invention provides a sheet feeding apparatus comprising a feeding device for feeding a sheet, in which the sheet (member to be fed) is urged against surfaces of elastic members that are opposed to surfaces on which vibration elements are fixedly mounted, and a frequency voltage is applied to the vibration elements to create vibration waves in the elastic members, whereby a feeding force is supplied to the sheet by vibrating surfaces of the elastic members on which the vibration waves are created. A detecting device is also provided for detecting a feeding amount of the sheet. The apparatus is adapted to urge and pinch the sheet by a rotary shaft of a rotation angle detection device or a roller fixed to the rotary shaft and a rotatable pressure roller disposed in confronting relation to the aforementioned roller. The pressure roller of the sheet feeding amount detecting device or the rotation angle detection device is attached to a pressurizing device which can vary an urging force acting on the sheet.

REFERENCES:
patent: 4723129 (1988-02-01), Endo et al.
patent: 4740796 (1988-04-01), Endo et al.
patent: 4753433 (1988-06-01), Rodi et al.
patent: 4997177 (1991-03-01), Mori et al.
patent: 5071113 (1991-12-01), Nakamura et al.
patent: 5085423 (1992-02-01), Nishimoto et al.

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