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:
Nov. 30, 2010
Filed:
Sep. 28, 2007
Yoshinobu Okumura, Yamatokoriyama, JP;
Yasushi Matsutomo, Nara, JP;
Haruo Sayama, Yamatokoriyama, JP;
Yasunobu Ohkawa, Nara, JP;
Michihiro Yamashita, Nara, JP;
Yuriko Kamei, Nara, JP;
Yasuhiro Takai, Sakurai, JP;
Yoshinobu Okumura, Yamatokoriyama, JP;
Yasushi Matsutomo, Nara, JP;
Haruo Sayama, Yamatokoriyama, JP;
Yasunobu Ohkawa, Nara, JP;
Michihiro Yamashita, Nara, JP;
Yuriko Kamei, Nara, JP;
Yasuhiro Takai, Sakurai, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A sheet feeder has a feed passage and includes feed roller pairs, sensors, and a controller. The feed roller pairs are arranged along the feed passage and feed sheets of paper in a feed direction along the passage by nipping the sheets. Each of the sensors is fitted at or near one of the feed roller pairs and senses a specified point on each of the sheets when the sheet is nipped by at least the associated roller pair. The controller includes a memory for storing reference feed timings as proper feed timings at each of which the specified points on the sheets should pass one of the sensors. The controller finds the real feed timing when each of the sensors senses the specified point on the sheet nipped by at least the associated roller pair. When each of the sensors senses the specified point on the sheet nipped by at least the associated roller pair, the controller finds the time difference between the associated reference feed timing and the associated real feed timing and controls, according to the found time difference, the feed speed at which the feed roller pair or pairs nipping the sheet feed it.