SHEET FEED DEVICE AND IMAGE FORMING DEVICE

Title:

SHEET FEED DEVICE AND IMAGE FORMING DEVICE

Document Type and Number:

WIPO Patent Application WO/2011/007406

Kind Code:

A1

Abstract:

When a sheet feed device using a retard roller is used to continuously feed sheets, intervals between the sheets being fed vary because the positions of the leading ends of the sheets vary. To solve such a problem, a sheet feed device is configured such that, when a retard roller (55) is rotating in a sheet feed direction, the rotation is transmitted to a pick-up roller (53) to rotated the pick-up roller (53) in the direction in which sheets are fed and, when the retard roller (55) is rotating in the direction opposite the sheet feed direction or is at a stop, the pick-up roller (53) is adapted not to feed the sheets. As a result, when the sheets are continuously fed, the next sheet is fed so that the leading end of the sheet always reaches the nip between a feed roller (54) and the retard roller (55), and this stabilizes the intervals between the sheets when the sheets are continuously fed.

Inventors:

MATSUSHIMA AKIRA (JP)
UCHIDA YASUHIRO (JP)
OKAZAKI SHUNSUKE (JP)
KAWANISHI MINORU (JP)
WATANABE KENJI (JP)
FURUSAWA MOTOHIRO (JP)

Application Number:

PCT/JP2009/062671

Publication Date:

January 20, 2011

Filing Date:

July 13, 2009

Export Citation:

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Assignee:

CANON KK (JP)
MATSUSHIMA AKIRA (JP)
UCHIDA YASUHIRO (JP)
OKAZAKI SHUNSUKE (JP)
KAWANISHI MINORU (JP)
WATANABE KENJI (JP)
FURUSAWA MOTOHIRO (JP)

International Classes:

B65H3/06; B65H3/52

Foreign References:

JP2002145469A	2002-05-22
JP2000177874A	2000-06-27
JP2001026328A	2001-01-30
JP2001341869A	2001-12-11

Other References: