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. 06, 2013
Filed:
Nov. 18, 2010
Masaya Shimmachi, Kawasaki, JP;
Kenji Kawazoe, Yokohama, JP;
Kazuyuki Morinaga, Machida, JP;
Tetsu Hamano, Tokyo, JP;
Toshiaki Tokisawa, Yokohama, JP;
Masaya Shimmachi, Kawasaki, JP;
Kenji Kawazoe, Yokohama, JP;
Kazuyuki Morinaga, Machida, JP;
Tetsu Hamano, Tokyo, JP;
Toshiaki Tokisawa, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A sheet feeding apparatus including sheet feeding unit; a pressure plate on which sheets are stacked and which is biased so that an uppermost sheet of the stacked sheets comes in pressure contact with the sheet feeding unit; a first pressing-down mechanism which presses down the pressure plate to separate the uppermost sheet and the sheet feeding unit by a constant distance when the sheet feeding unit is not operated; a second pressing-down mechanism which is adopted to press down the pressure plate when an amount of the sheets stacked on the pressure plate is smaller than a predetermined amount, and is given a load from the pressure plate depending on a position of the pressure plate; and sheet stacking amount detecting unit which measures the load and detects a stacking amount of the sheets stacked on the pressure plate on the basis of the measured load.