Sheet feeder and image forming device provided with the same

Details Sheet feeder and image forming device provided with the same Sheet feeder and image forming device provided with the same

2011-04-26

2011-04-26

Karmis, Stefanos (Department: 3653)

Sheet feeding or delivering

Feeding

Separators

C271S902000, C074S435000

Reexamination Certificate

active

07931265

ABSTRACT:
A sheet feeder includes a feed roller feeding a sheet while rotating in a feeding direction, a driving gear that rotates in a predetermined direction and transmits a driving force, a first gear mechanism transmitting the force to the feed roller to rotate the feed roller in a reverse direction opposite to the feeding direction, and a second gear mechanism transmitting the force to the feed roller to rotate the feed roller in the feeding direction. The driving gear includes a first engaging member that engages with the first gear mechanism and transmits the force to the first gear mechanism at a rotational angle of the driving gear within a first range, and a second engaging member that engages with the second gear mechanism and transmits the force to the second gear mechanism at the rotational angle within a second range having no common range with the first range.

REFERENCES:
patent: 1804138 (1931-05-01), Yeider
patent: 5195735 (1993-03-01), Sellers
patent: 5276466 (1994-01-01), Tsukada et al.
patent: 2006/0180986 (2006-08-01), Hattori
patent: 2006/0180987 (2006-08-01), Hattori
patent: HEI 3-51230 (1991-03-01), None
patent: 03-105139 (1991-10-01), None
patent: HEI 3-105139 (1991-10-01), None
patent: HEI 11-292316 (1999-10-01), None
patent: 2001-180831 (2001-03-01), None
patent: 2005-263369 (2005-08-01), None
patent: 2006-176321 (2006-07-01), None

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