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:
Jun. 23, 2009
Filed:
Aug. 31, 2006
Masakatsu Yamada, Ibaraki, JP;
Toshiyuki Takano, Ibaraki, JP;
Yasushi Ishida, Ibaraki, JP;
Toshiaki Saito, Ibaraki, JP;
Takashi Imai, Chiba, JP;
Shigeyuki Sugiyama, Kanagawa, JP;
Makoto Satake, Chiba, JP;
Daigo Nakagawa, Ibaraki, JP;
Naomi Nakamura, Chiba, JP;
Nobuyuki Bannai, Chiba, JP;
Takuma Suzuki, Tokyo, JP;
Seiya Fujinaga, Ibaraki, JP;
Masakatsu Yamada, Ibaraki, JP;
Toshiyuki Takano, Ibaraki, JP;
Yasushi Ishida, Ibaraki, JP;
Toshiaki Saito, Ibaraki, JP;
Takashi Imai, Chiba, JP;
Shigeyuki Sugiyama, Kanagawa, JP;
Makoto Satake, Chiba, JP;
Daigo Nakagawa, Ibaraki, JP;
Naomi Nakamura, Chiba, JP;
Nobuyuki Bannai, Chiba, JP;
Takuma Suzuki, Tokyo, JP;
Seiya Fujinaga, Ibaraki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image reading device includes a memory unit for storing positional information of a sensor for moving by a drive unit to read an image of a document and a control unit for controlling the drive unit to move the sensor based on the positional information stored in the memory unit. The control unit drives the drive unit by an amount of driving sufficient for an image reading unit to move in a predetermined direction to abut the stop members, controls the drive unit to move the sensor so as to detect the position mark, and updates the positional information of the memory unit to a predetermined initial value based on the detection of the position mark by the sensor. The image reading device can store data of a reference position promptly even if a photo-interrupter is not provided when the data of the reference position is not stored in a memory unit.