Process for perforating stencil printing sheet

Details Process for perforating stencil printing sheet Process for perforating stencil printing sheet

1995-09-22

1997-04-08

Burr, Edgar S.

Printing

Stenciling

Processes

1011284, B41M 112

Patent

active

056177879

ABSTRACT:
A process for perforating a stencil sheet comprising a thermoplastic resin film is disclosed which process comprises melting predetermined portions of the thermoplastic resin film with the heat from heat-generating elements to form perforations while applying a pressure to the film and under such a condition that the film is spaced away from the heat-generating elements by a close distance. According to the process of the invention, perforations through which ink passes smoothly can be formed in a stencil sheet using a thermal head and thus clear images can be obtained.

REFERENCES:
patent: 3862396 (1975-01-01), Machida et al.
patent: 3871899 (1975-03-01), Andersen
patent: 5195832 (1993-03-01), Fujikawa et al.
patent: 5243906 (1993-09-01), Okusawa
patent: 5251567 (1993-10-01), Fuwa
patent: 5415090 (1995-05-01), Natori et al.
patent: 5417156 (1995-05-01), Tateishi et al.

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