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:
Dec. 28, 1993
Filed:
Jul. 08, 1991
Yoshiharu Iwanaga, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A sheet feeding apparatus having a sheet supporting tray for supporting sheets, a sheet supply roller for feeding out the sheet supported by the sheet supporting tray thereon, a separating device having a plurality of separating surfaces of different coefficients of friction and adapted to separate the sheets one by one by cooperating with the sheet supply and roller by abutting against the sheet supply roller, a separating surface changing device for changing the separating surface to be abutted against the sheet supply tray, a detector for detecting a poor separating condition in which the sheets are not readily separated one by one by the separating tray, and a controller for controlling the separating surface changing device in accordance with the detected result of the detector to change the separating surface to be abutted against the sheet supply tray.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile