The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 2019
Filed:
Feb. 20, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Yasuhito Fujinuma, Kashiwa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A sheet feeding device includes a stacking unit for stacking a sheet; a feeding member for feeding the sheet stack on the stacking unit; a holding member holding the feeding member; a holder supporting portion, provided above the stacking unit, for detachably supporting the holding member; a raising and lowering unit for raising and lowering the holding member; a detection unit for detecting a topmost surface of the sheet stacked on the stacking unit, by detecting the holding member; a control unit for effecting raising and lowering operation of the holding member using the raising and lowering unit before a feeding operation of the feeding member and detect presence or absence of the holding member on the basis of a signal from the detection unit produced with the raising and lowering operation.