Lighographic film material

Details Lighographic film material Lighographic film material

1989-06-30

1991-07-02

Ryan, Patrick J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

430 17, 430306, 428195, B32B 900

Patent

active

050284754

ABSTRACT:
A lithographic film material is used to make an optical stencil with words formed by thermally removing an ink-layer by means of a thermal ink-transferred ribbon. The lithographic film material includes a transparent base sheet, a transparent thermoplastic interlayer coated over the transparent base sheet, and a light-opaque thermoplastic ink-layer coated over the thermoplastic transparent interlayer. The transparent thermoplastic interlayer as well as the light-opaque thermoplastic ink-layer are peeled in a letter pattern by an ink-transferred ribbon after being printed with a thermal print head of a thermal ink-transfer printer so as to form transparent letters on the transparent base sheet, thus providing the optical stencil.

REFERENCES:
patent: 4369244 (1983-01-01), Eian et al.
patent: 4369295 (1983-01-01), Beruto et al.
patent: 4467022 (1984-08-01), Eian et al.

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