Sheet feeder capable of eliminating overlapping sheet feed

Details Sheet feeder capable of eliminating overlapping sheet feed Sheet feeder capable of eliminating overlapping sheet feed

1998-10-13

2000-10-31

Ellis, Christopher P.

Sheet feeding or delivering

Feeding

Separators

271114, 271109, B65H 352

Patent

active

061390062

ABSTRACT:
A sheet feeder provided in an image forming device and includes a sheet feed roller, a pair of collars provided at both ends of the sheet feed roller and rotatable independent of the sheet feed roller, and a separation pad provided in confronting relation to the sheet feed roller and the pair of collars. The sheet feed roller has a cylindrical roller having a diameter smaller than that of the collar and a roller shaft. An irregular diameter sleeve including first and second radius portions is mounted on the roller shaft, and the collar is loosely rotatable on the irregular diameter sleeve. The first radius portion has a first radius greater than a second radius of the second radius portion. When the first radius portion is angularly rotated to a position in confrontation with the separation pad, a distance between an axis of the roller shaft and the lower end of the collar is greater than the radius of the feed roller. When the second radius portion is angularly rotated to the position in confrontation with the separation pad, the lower end of the collar can be moved upwardly, so that the sheet feed roller can perform sheet nipping relative to the separation pad.

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patent: 6022015 (2000-02-01), Matsumoto

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