Method and apparatus for U.P.C./EAN symbology ambiguous characte

Details Method and apparatus for U.P.C./EAN symbology ambiguous characte Method and apparatus for U.P.C./EAN symbology ambiguous characte

1997-05-20

1998-12-29

Burr, Edgar

Typewriting machines

Code-printing typewriter

400104, B41J 500

Patent

active

058532528

ABSTRACT:
A method and apparatus is disclosed that can be used to print the U.P.C./EAN symbology in a way that does not suffer poor print quality over a range of ink spread conditions by applying appropriately more or less thermal energy to at least one row of dots on the internal edges of the ambiguous characters. The resultant characters have identical edge-to-edge measurements to those without the compensation; but, the sum of the widths of the bars are beneficially adjusted. The resulting print quality grades and scanning performance are enhanced on thermal printer platforms of moderate to high resolution.

REFERENCES:
patent: 4795281 (1989-01-01), Ulinski
patent: 5007748 (1991-04-01), Lee et al.
patent: 5023437 (1991-06-01), Speicher
patent: 5056429 (1991-10-01), Hirosaki
patent: 5676473 (1997-10-01), Wright
Bassetti, L. W. and S. Kantor, "Print Enhancement for Laser Printers," IBM Technical Disclosure Bulletin 27:5, Oct., 1984, pp. 3071-3072.
"Table of Contents," IBM Technical Disclosure Bulletin 27:5, Oct., 1984, pp. i-xvi.

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