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.

Date of Patent:
Aug. 09, 2011

Filed:

Dec. 08, 2009
Applicants:

Yuta Tachibana, Toyokawa, JP;

Yoshiyuki Toso, Toyokawa, JP;

Yutaka Otsuka, Toyokawa, JP;

Shoichi Tsuge, Okazaki, JP;

Inventors:

Yuta Tachibana, Toyokawa, JP;

Yoshiyuki Toso, Toyokawa, JP;

Yutaka Otsuka, Toyokawa, JP;

Shoichi Tsuge, Okazaki, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65H 7/02 (2006.01);
U.S. Cl.
CPC ...
Abstract

A sheet detection unit of an image forming apparatus includes a light receiving unit including a plurality of light receiving elements arranged in a sheet feeding direction. A computation processing unit shifts signals from the elements in synchronization with a sheet feeding speed and makes additions, increases a signal change level, and stores the signals in buffers in a result storage unit. A sheet position determination unit detects a position of an edge portion of a sheet being fed based on distribution of data stored in the buffers.


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