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. 16, 2012
Filed:
Nov. 19, 2008
Atsushi Shoji, Tokyo, JP;
Atsushi Shoji, Tokyo, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
To correct distortion in an optical system of an optical scanning, electrophotographic image generating apparatus, a parallel line group' is printed by a printing apparatus to be calibrated on a sheet on which a correction patternhas been printed. The user reads marker positions to find amounts of deviation of the adjustment pattern from the correction pattern and inputs the amounts of deviation in the printing apparatus. The printing apparatus interpolates values between the input amounts of deviation, establishes positions at which a line in the adjustment pattern deviate one pixel in a sub-scanning direction as scan line changing points and generate new conversion information by pairing the scan line changing points with respective directions of deviation. During image generation, the printing apparatus prints an image by correcting image data according to the conversion information.