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. 21, 1989
Filed:
Nov. 08, 1988
Tokyo Electric Co., Ltd., Tokyo, JP;
Abstract
An image reading device comprises an original table having a surface area defined as a reading section, a black mark, a carrier driven towards the reading section across the mark in the sub-scanning direction, a fluorescent light for illuminating the original and mark, and an image sensor fixed on the carrier and having a plurality of light receiving elements arranged in a line to read the image in the main scanning direction. In this image reading device, the mark is formed of a triangle which has a first side extending in the sub-scanning direction and a second side extending from the first side towards the original table at an angle with respect to the first side smaller than an angle made between the first side and the main scanning direction, and a reading control circuit is provided to detect that black picture element data is output from at least a preset number of successive light receiving elements while the image sensor is being moved by the movement of the carrier to pass across the mark, and setting the reading starting position in the main scanning direction by using, as a reference position, the position of the light receiving element which corresponds to the second side of the mark and is included in the light receiving elements which output the image data.