Verification of barcodes

Details Verification of barcodes Verification of barcodes

1995-08-03

1998-12-15

Hajec, Donald T.

Registers

Records

Particular code pattern

235456, 235462, G06K 710, G06K 1906

Patent

active

058500804

ABSTRACT:
Verification patterns are associated with barcodes to provide rapids visual confirmation that a barcode is printed within acceptable tolerances. A master of a barcode to be produced includes at least one verification pattern including a wedge formed by an unprinted area or areas bounded by a printed area or areas. During reproduction, an anticipated degree of ink-spread will cause a predetermined degree of shortening of the wedge, while abnormal degrees of shortening are an indication of press and/or pre-press errors and/or an inappropriately specified master. With a suitably dimensioned wedge, compliance with bar and space width tolerances can be assessed. Two types of verification patterns may be used in conjunction with a single bar code to enable detection of different types of errors.

REFERENCES:
patent: 4449052 (1984-05-01), Krieg
patent: 5069556 (1991-12-01), Sasaki et al.
patent: 5123352 (1992-06-01), Luttrell
patent: 5218190 (1993-06-01), Hardesty et al.
patent: 5413419 (1995-05-01), Oami et al.
patent: 5451990 (1995-09-01), Sorenson et al.

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