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:
Nov. 18, 2003
Filed:
Oct. 04, 1999
Hideo Horigome, Yokohama, JP;
Yukio Yuasa, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A serial scanner apparatus, correction method thereof, and storage medium for performing bi-directional reading with high precision and greatly improving the reading speed. A carriage is first driven in the forward direction, then reversed, and driven in the backward direction. The carriage is accelerated until the speed reaches a predetermined velocity v . When the predetermined velocity v is reached, the carriage is driven at constant speed. In the head portion of the constant-speed driving area, a correction area (reference correction area), having the same distance as that of the correction area for forward driving, is provided. With the use of an area (actual correction area) obtained by adding an area for correction time stored by a controller unit to the reference correction area, read-start timing is adjusted and the bi-directional error is corrected.