Printing – Stenciling – Stencils
Patent
1999-10-14
2000-07-25
Hilten, John S.
Printing
Stenciling
Stencils
101129, 101127, 101116, 427143, 427282, 428131, B41C 114, B41M 112, B41L 1304
Patent
active
060924624
ABSTRACT:
A regenerable stencil printing plate is provided, which can be repeatedly used in master making and printing. The stencil printing plate comprises a film made of such a polymeric material as polypyrrole and polythiophene which shrinks when it adsorbs a specific compound, and numerous fine apertures are formed in the film in cross sectional direction thereof. Stencil printing is performed by providing the stencil printing plate as mentioned above, transferring the compound to the film in such a manner that a desired image is reproduced to expand the apertures selectively at sites to which the compound is transferred, and allowing an image forming material to pass through the thus expanded apertures and transfer to a recording medium. The stencil printing plate can constitute an outer circumferentical surface of an ink-permeable cylindrical printing drum used in a conventional stencil printing apparatus. The plate can be regenerated by desorbing the above compound or coating another compound capable of adsorbing to the plate and expanding the polymeric material to narrow the expanded apertures of the plate.
REFERENCES:
patent: 5924361 (1999-07-01), Watanabe
patent: 6035778 (2000-03-01), Uchiyama
Grohusky Leslie J.
Hilten John S.
Riso Kagaku Corporation
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