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:
Jul. 16, 2002
Filed:
Oct. 15, 1999
Keiichi Tanioka, Ome, JP;
Akihiro Nemoto, Hachioji, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
A laser beam scan type barcode reader which reads a pair of spaced marks which adjusts or specify corrects start and stop positions of the laser beam irradiation. The distance between the pair of marks corresponds to a length of a barcode to be read. The reader detects the start and stop positions of the laser beam irradiation determined by the pair of marks, and sets the detected start and stop positions of the laser beam irradiation. When the reader reads the barcode, it controls the turning on/off of the laser beam in one scan period based on the set start and stop positions of the laser beam irradiation, and determines the actual scan span in which the laser beam is turned on in the one scan period based on the start and stop positions determined by the pair of marks, which ensures preventing structural, functional and characteristic deviations of the reader from the standards from influencing the scan span of the laser beam.