Doctor for screen printing

Details Doctor for screen printing Doctor for screen printing

1990-03-19

1991-07-16

Burr, Edgar S.

Printing

Stenciling

Traveling-inker machines

152565, B41F 1544

Patent

active

050315285

ABSTRACT:
A doctor for screen printing comprises a doctor strip having a lip of elastic material intended to rest on the printing screen, as well as a soft or hard elastic backing arranged on one or both sides of the doctor strip, the doctor strip and the backing being clamped in a doctor holder extending across the width of the printing screen. To improve the ink distribution on the print pattern and the guiding of the scraper on the printing screen, and to provide a more satisfactory reproducible contact pressure behaviour or flexural rigidity under a constant angle of incidence of the scraper, the doctor strip and the backing are laminated together over substantially their whole surface area to form a composite material with layers of two different degrees of elasticity. In one embodiment, relatively soft strips are applied to both sides of a hard elastic backing to form composite.

REFERENCES:
patent: 4121519 (1978-10-01), Porth
patent: 4216716 (1980-08-01), Zimmer
patent: 4549933 (1985-10-01), Judd et al.
patent: 4823161 (1989-04-01), Yamada et al.
patent: 4940354 (1990-07-01), Holderegger et al.

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