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. 12, 2014
Filed:
May. 21, 2012
Koichi Kudo, Kanagawa, JP;
Makoto Nakura, Ibaraki, JP;
Naoto Ueda, Ibaraki, JP;
Satoshi Ueda, Ibaraki, JP;
Akira Kobashi, Ibaraki, JP;
Shingo Takai, Ibaraki, JP;
Koichi Kudo, Kanagawa, JP;
Makoto Nakura, Ibaraki, JP;
Naoto Ueda, Ibaraki, JP;
Satoshi Ueda, Ibaraki, JP;
Akira Kobashi, Ibaraki, JP;
Shingo Takai, Ibaraki, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A sheet length measuring device includes a rotating body configured to rotate with a movement of a sheet in a conveying direction; a position detecting unit configured to detect leading and trailing ends of the sheet passing through a position of the rotating body; a measuring unit configured to measure a rotation amount of the rotating body and output an origin signal per one revolution of the rotating body; a storage unit configured to store changes of a sheet conveying amount with respect to respective rotation angles in one revolution of the rotating body; and a calculating unit configured to calculate a corrected length of the sheet from a value obtained from a rotation angle of the rotating body when the leading end of the sheet is detected and a value obtained from a rotation angle of the rotating body when the trailing end of the sheet is detected.