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. 30, 1981
Filed:
May. 21, 1979
Bruce A Rady, Palatine, IL (US);
Thomas R Wells, Des Plaines, IL (US);
Kenneth Hendrickson, Chicago, IL (US);
Bell & Howell Company, Chicago, IL (US);
Abstract
A single sensor system reads a traveling bar code comprising a plurality of marks separated by spaces. Each of the marks may have either of two durations and each of the spaces has a uniform duration. The bar codes are transported, relative to the sensor, at any of many different speeds so that the signals generated by the sensor may have unpredictable durations. The inventive reader determines the speed at which the bar code is being transported and interprets the signals generated by the bar code marks according to the determined speed. As used herein, the reference to 'any of many different speeds' recognizes that different bar code transport devices, owing to their own inherent characteristics, may operate at different speeds although the speed for any given code transport device will tend to be fairly uniform. In some embodiments, the invention accommodates speed fluctuations in the operation of a single transport device.