Feeding device having a feed roller with a low coefficient porti

Details Feeding device having a feed roller with a low coefficient porti Feeding device having a feed roller with a low coefficient porti

1997-02-27

1998-05-05

Milef, Boris

Sheet feeding or delivering

Feeding

Separators

271127, 271162, B65H 306

Patent

active

057464260

ABSTRACT:
A feeding device which feeds paper sheets accommodated in a paper supply tray detachable from a body of an image forming apparatus. Paper sheets stacked in the paper supply tray is induced to make pressure contact with a feed roller in conjunction with attachment of the paper supply tray to the body of the apparatus, and release the pressure contact between paper sheets and the feed roller in conjunction with detachment of the paper supply tray from the body of the apparatus. The feed roller has on an exterior surface at least one portion having a friction coefficient lower than the rest portion of the exterior surface, and is stopped its rotation in a state that the lower friction coefficient portion contacts with an uppermost paper sheet when paper feeding is completed, so as to prevent paper jams caused by shifting or deformation of the uppermost paper sheet during attachment or detachment of the paper supply tray to the body of the apparatus.

REFERENCES:
patent: 4032136 (1977-06-01), Komaba et al.
patent: 4569587 (1986-02-01), Miyoshi et al.
patent: 4674735 (1987-06-01), Du Bon et al.
patent: 4685792 (1987-08-01), Iseki et al.
patent: 5139252 (1992-08-01), Morita et al.
patent: 5372359 (1994-12-01), Miura et al.

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