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:
Oct. 26, 2010
Filed:
Jul. 05, 2007
Yusuke Nagano, Nara, JP;
Yusuke Nagano, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A sheet feeder includes: a sheet-length detection member for detecting a length of a sheet; a transfer-length detection member for detecting a transfer length of the sheet; a double-feed detection member for detecting double feed of the sheets when the sheets are transferred while being overlapped with one another; and a control member for controlling the sheet-length detection member, the transfer-length detection member and the double-feed detection member; wherein the control member determines that double feed of the sheets has occurred, when the transfer length of the sheet is greater than the length of the sheet and a length obtained by subtracting a difference between the transfer length of the sheet and the length of the sheet from the length of the sheet is substantially equal to a double-feed length detected by the double-feed detection member.