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:
Dec. 14, 1999
Filed:
Jan. 28, 1998
Akio Suzuki, Yokohama, JP;
Toshimitsu Danzuka, Tokyo, JP;
Haruhiko Moriguchi, Yokohama, JP;
Yoshihiro Takada, Kawasaki, JP;
Yasushi Miura, Kawasaki, JP;
Hisashi Fukushima, Yokohama, JP;
Masami Izumizaki, Tokyo, JP;
Nobuhiko Takekoshi, Yokohama, JP;
Nobuyuki Watanabe, Yokohama, JP;
Eiichi Takagi, Yokohama, JP;
Haruhiko Takahashi, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes reading means for reading the density of a test pattern corresponding to each of plural recording elements of a recording head, the recording elements being arranged in an array, and the test pattern being recorded by the recording elements. An eliminating means eliminates error information, recorded from an area outside a test pattern are, from density information obtained by the reading means when the density of a test pattern end portion corresponding to an end portion of the array of plural of recording elements is determined. A means is provided for uniforming the image densities in correspondence with the plurality of recording elements based on density information from which the error information is eliminated by the eliminating means.