Thermographic relief printing method

Details Thermographic relief printing method Thermographic relief printing method

1989-04-03

1992-03-24

Lawrence, Evan

Coating processes

Solid particles or fibers applied

Localized different areas produced

427201, 427202, B05D 500, B05D 136

Patent

active

050987399

ABSTRACT:
A thermographic relief printing method is shown for printing a substrate at a printing station. The substrate is sprinkled with a thermographic powder at successive stations with each application station being provided with an applicator for applying a powder a predetermined grain size. The grain sizes are selected to achieve the maximum packing density and the powders are formed with substantially microspheric form of a specified diameter. The diameter of the powder grains at the first application station is greater than the diameter of the powder grains at the next successive application station. The substrate is passed to an oven in which the powder is fused to the printed areas of the substrate.

REFERENCES:
patent: 1531613 (1925-03-01), Hommel
patent: 2689801 (1954-09-01), D'Alelio
patent: 2757635 (1956-08-01), Lipsius
patent: 2821163 (1958-01-01), Walton
patent: 3682738 (1972-08-01), Smith

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