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US 9,100,523 B2Granted
Image forming apparatus comprising a sheet feeding device and an image reading device
AssigneeCanon Kabushiki Kaisha
InventorTadashi Hanabusa
Life of this patent
Estimating the term…
Abstract
A sheet feeding apparatus includes a sheet feeding unit configured to feed stacked sheets, a detection unit configured to detect, from a side opposite the sheet feeding unit, sheet movement with respect to the stacked sheets, and a determination unit configured to determine that a sheet being fed by the sheet feeding unit is a last sheet.
Claims9
A document reading and recording apparatus comprising:
- a document feeding unit configured to feed at least one document from documents set on a mounting portion;
- a reading unit configured to read an image of a document fed by the document feeding unit;
- a sheet feeding roller configured to feed at least one sheet to be recorded;
- a recording unit configured to record an image, according to image information, read by the reading unit, on a sheet fed by the sheet feeding roller;
- a detection unit configured to detect, from a side opposite to the document feeding unit, a document movement amount with respect to a lowermost sheet of the set documents on the side opposite to the document feeding unit;
- and
- a control unit configured to stop feeding sheets, by the sheet feeding roller, based on detection by the detection unit.
4 more elements
A document reading and recording apparatus comprising:
- a sheet feeding roller configured to feed loaded sheets to be recorded;
- a transmission unit configured to transmit drive to the sheet feeding roller, wherein the transmission unit includes an overrunning mechanism configured to permit the sheet feeding roller to rotate faster than a rotation caused by the drive transmitted to the sheet feeding roller;
- a conveyance roller provided on a downstream side in a conveyance direction of the sheet feeding roller, wherein the conveyance roller is configured to convey a sheet to be recorded, being fed by the sheet feeding roller at a speed faster than the sheet feeding roller;
- a document feeding roller configured to feed loaded documents;
- a reading unit configured to read an image of a document fed by the document feeding roller;
- a recording unit configured to record an image, according to image information, read by the reading unit, on a sheet fed by the sheet feeding roller;
- and
- a detection unit configured to detect a document movement, wherein, based on a detection result of the detection unit, it is determined whether a document being fed is a last document from among loaded documents, wherein, the sheet feeding roller is stopped if the document being fed is the last document, and a next sheet to be recorded is fed if the document being fed is not the last document.
5 more elements
A sheet feeding apparatus comprising:
- a sheet feeding roller configured to feed loaded sheets;
- a transmission unit configured to transmit drive from a driving source to the sheet feeding roller, wherein the transmission unit includes an overrunning mechanism configured to permit the sheet feeding roller to rotate faster than a rotation caused by the drive transmitted to the sheet feeding roller;
- and
- a conveyance roller provided on a downstream side in a conveyance direction of the sheet feeding roller, wherein the conveyance roller is configured to convey a sheet fed by the sheet feeding roller at a speed faster than the sheet feeding roller while the overrunning mechanism causes the sheet feeding roller to run idle,
- wherein the sheet feeding roller and the conveyance roller feed sheets successively and at intervals while a driving source continuously drives the transmission unit, and
- wherein feeding sheets is terminated by cutting off transmission of the drive to the sheet feeding roller before a trailing edge of the sheet being conveyed by the conveyance roller passes through the sheet feeding roller.
3 more elements
Dependencies are inferred from the claim text.