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:
Jun. 19, 1979
Filed:
Apr. 10, 1978
Applicant:
Inventors:
Sadao Nakanishi, Ise, JP;
Kazuhiro Suzuki, Ise, JP;
Nobufumi Tokura, Ise, JP;
Shinichiro Endo, Ise, JP;
Assignee:
Shinko Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ; G08C / ; G11B / ;
U.S. Cl.
CPC ...
235463 ; 250555 ; 360 40 ;
Abstract
A method and apparatus for reading label bar codes in which a photoelectric signal representative of an optically scanned bar code label is differentiated. The positive and negative peaks of the differentiated signal are detected, and the time intervals between the peaks are measured by counter means to produce output signals representative of the bar code label. A multi-level threshold comparison technique is used to detect and predict the occurrence of positive and negative peaks.