Label find method and circuit

Details Label find method and circuit Label find method and circuit

1977-06-27

1978-11-14

Canney, Vincent P.

Registers

Coded record sensors

Particular sensor structure

G06K 710, G06K 1906

Patent

active

041257650

ABSTRACT:
A method and circuit for finding the beginning of valid coded information from a scanner reading a label such as the Universal Product Code (UPC) label establishes a plurality of counting gates based on a predetermined sequence of discrete signal transitions and counts a plurality of related pulse frequencies during the gating periods under control of the established counting gates. The accumulated counts are compared in a predetermined sequence to determine whether selected counts when compared bear a predetermined relationship to each other and a code generated indicative of the relationship which indicates the beginning of valid label data or invalid label data on a continuous basis.

REFERENCES:
patent: 3723710 (1973-03-01), Crouse et al.
patent: 3784792 (1974-01-01), Dobras
patent: 3891831 (1975-06-01), Coles, Jr.
patent: 3909787 (1975-09-01), Laurer et al.
patent: 3978319 (1976-08-01), Vinal
patent: 4059224 (1977-11-01), Seligman

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