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US 7,857,303 B2Granted
Sheet feeding apparatus and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsAkira Oomori, Masao Amano, Eiichiro Kimizuka, Daisuke Aoki
Life of this patent
Estimating the term…
Abstract
An over-stack protective portion is provided on a stopper member. When a sheet feeding device is in a standby position, the over-stack protective portion is held in a position in which the over-stack protective portion is in pressure contact with sheets having the maximum stacking height capable of being fed and supported by a sheet supporting portion. Also, when the sheets are to be fed, the pressure contact of the over-stack protective portion with the sheets having the maximum stacking height is released.
Claims10
A sheet feeding apparatus comprising:
- a sheet supporting portion configured to support sheets;
- a sheet feeding device movable between a sheet feeding state for feeding the sheets supported on said sheet supporting portion and a standby position spaced from the sheets supported by said sheet supporting portion and configured to feed the sheets supported on the sheet supporting portion at the sheet feeding state;
- an over-stack protective portion provided upstream of said sheet feeding device in the sheet feeding direction and configured to restrict a manual insertion of a plurality of sheets higher than a maximum stacking height capable of being supported by said sheet supporting portion;
- and
- a stopper member provided downstream of the over-stack protective portion in the sheet feeding direction and configured to regulate a leading edge of the manual insertion sheets inserted between the sheet supporting portion and the over-stack protective portion, wherein the stopper member releases a regulation of the sheet leading edge while the sheet feeding device feeds the sheets, and
- wherein a movement of said over-stack protective portion is regulated to restrict the insertion of sheets when said sheet feeding device is in said standby position, and said over-stack protective portion is released from a regulation of the movement in association with a movement of said sheet feeding device from the standby position to the sheet feeding state.
3 more elements
An image forming apparatus comprising:
- a sheet supporting portion configured to support sheets;
- a sheet feeding device movable between a sheet feeding state position for feeding the sheets supported on said sheet supporting portion and a standby position spaced from the sheets supported by said sheet supporting portion and configured to feed the sheets supported on the sheet supporting portion at the sheet feeding state;
- an over-stack protective portion provided upstream of said sheet feeding device in the sheet feeding direction and configured to restrict a manual insertion of a plurality of sheets higher than a maximum stacking height capable of being supported by said sheet supporting portion;
- and
- a stopper member provided downstream of the over-stock protective portion in the sheet feeding direction and configured to regulate a leading edge of the manual insertion sheets inserted between the sheet supporting portion and the over-stack protective portion, wherein the stopper member releases a regulation of the sheet leading edge while the sheet feeding device feeds the sheets,
- an image forming portion configured to form an image on the sheet fed out by said sheet feeding device,
- wherein a movement of said over-stack protective portion is regulated to restrict the insertion of sheets when said sheet feeding device is in said standby position, and said over-stack protective portion is released from a regulation of the movement in association with a movement of said sheet feeding device from the standby position to the sheet feeding state.
4 more elements
Dependencies are inferred from the claim text.