Method for processing a stencil master plate by using a thermal

Details Method for processing a stencil master plate by using a thermal Method for processing a stencil master plate by using a thermal

1992-03-16

1996-06-11

Tran, Huan H.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Having driving circuitry for recording means

347171, B41J 2325, B41J 2355

Patent

active

055260322

ABSTRACT:
In processing a stencil master plate by making perforations in the manner of a dot matrix on a heat sensitive film of a thermal stencil master plate by using a thermal head having plural minute heat elements, perforations in a solid dark region of the dot matrix are omitted at a prescribed ratio if the dark region extends over 3.times.3 dots or larger, except for a peripheral part of the region. Through appropriate control of the amount of ink that passes through the perforations at the time of printing, and prevention of the blockage of the perforations achieved by thus optimizing the distribution of the perforations, offsetting, unevenness in density, and other problems detrimental to a favorable print quality may be eliminated without regard to the pattern of the original images.

REFERENCES:
patent: 4957378 (1990-09-01), Shima
patent: 5140898 (1992-08-01), Igarashi
patent: 5186102 (1993-02-01), Kanno et al.

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