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. 04, 2005
Filed:
Mar. 27, 2001
Katsuhiro Ishido, Ibaraki, JP;
Nobuo Matsuoka, Kanagawa, JP;
Akihiro Kashiwabara, Chiba, JP;
Toshio Hayashi, Ibaraki, JP;
Takeshi Aoyama, Chiba, JP;
Tsunao Honbo, Kanagawa, JP;
Noriaki Matsui, Ibaraki, JP;
Satoru Kijima, Chiba, JP;
Katsuhiro Ishido, Ibaraki, JP;
Nobuo Matsuoka, Kanagawa, JP;
Akihiro Kashiwabara, Chiba, JP;
Toshio Hayashi, Ibaraki, JP;
Takeshi Aoyama, Chiba, JP;
Tsunao Honbo, Kanagawa, JP;
Noriaki Matsui, Ibaraki, JP;
Satoru Kijima, Chiba, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An original size sensing method for an apparatus which includes a photoelectric converter for reading an image of an original placed on a platen, and a light source for irradiating the original with light, determines the presence/absence of incidence of ambient light on the basis of an output from the photoelectric converter while the light source is kept off. When ambient light is found to be incident, the method determines the size of an original placed on the platen on the basis of that output from the photoelectric converter, which falls outside the range in which the ambient light is incident, while the light source is kept on.