Stencil screens

Details Stencil screens Stencil screens

1968-12-10

1976-01-27

Klein, David

Printing

Stenciling

Stencils

1011284, 96 364, 427143, B41W 124

Patent

active

039345033

ABSTRACT:
A blank for forming a stencil screen for silk screen or electrostatic stencil printing is disclosed. The screen includes a resilient, high tensile strength, porous substrate such as a monofilamentary nylon or stainless steel 200-mesh screen. A light radiation absorbent, self-combustible, ink-resistant, ink-impervious and tough film is applied to the screen, suitably a combustible black nitrocellulose film or a black cellulose ether film containing finely dispersed nitrate or perchlorate. The film is selectively removed by directly pulsing high-intensity light of over 10 joules per square inch for a short duration of 1 to 50 milliseconds in the form of an image pattern to ignite and completely combust the film only in said areas during the duration of the pulse.

REFERENCES:
patent: 2040142 (1936-05-01), Koreska et al.
patent: 2500617 (1950-03-01), Meigs
patent: 2664043 (1953-12-01), Dalton
patent: 2808777 (1957-10-01), Roshkind et al.
patent: 3113511 (1963-10-01), Dalton
patent: 3283704 (1966-11-01), Dalton
patent: 3509088 (1970-04-01), Dalton

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