Printing roller

Details Printing roller Printing roller

1979-08-03

1981-01-27

Pieprz, William

Printing

Inkers

Fountains

101348, 101331, B41F 2136

Patent

active

042468426

ABSTRACT:
A printing roller is provided wherein such roller comprises an inner layer and a concentric ink applying tubular outer layer made of a microporous rubber material having cavities interconnected by passages defining a first ink flow control means. The inner layer is made of a sintered mass of material having a reticulated open pore structure which is harder than the outer layer, and acts as a second ink flow control means to provide uniform inking. The layers cooperate to define a substantially rigid roller having a soft ink applying layer.

REFERENCES:
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patent: 2763208 (1956-09-01), Rockoff et al.
patent: 2777824 (1957-01-01), Leeds
patent: 3139826 (1964-07-01), Rainwater
patent: 3253542 (1966-05-01), McDonough
patent: 3738269 (1973-06-01), Wagner
patent: 3797388 (1974-03-01), Kaminstein
patent: 3812782 (1974-05-01), Funahashi
patent: 3928521 (1975-12-01), Haren et al.
patent: 3971315 (1976-07-01), Hansen
patent: 4025685 (1977-05-01), Haren et al.
Vock, "Porous Roll Development System," Xerox Disclosure Journal, vol. 1, No. 4, p. 27, 4/76.
Cross, "Ribbonless Impact Printer," IBM Technical Disclosure Bulletin, vol. 14, No. 3, p. 898, 8/71.

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