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. 11, 1997
Filed:
May. 13, 1996
Chay La, Rochester, NY (US);
PSC, Inc., Webster, NY (US);
Abstract
A void and spot discrimination apparatus and method for successfully decoding bar code symbols having imperfections therein. A first and a second scan are performed, and a signal return is obtained, in which information is obtained related to a smallest size black bar and white space, as well as a largest size black bar and white space. The signal returns from the first and second scans is sent to a decoder, and third and fourth scans are performed. The signal returns from the third and fourth scans are altered based on the smallest/largest sizes obtained from the two previous scans, in order to eliminate potential ink spreads and print voids. The process is alternated in this manner until a successful bar code decoding is made.