Dampening roller and method for producing the same and dampening

Details Dampening roller and method for producing the same and dampening Dampening roller and method for producing the same and dampening

1993-03-09

1995-07-04

Burr, Edgar S.

Printing

Planographic

Dampeners

101350, 101349, B41L 2318, B41L 2518

Patent

active

054290465

ABSTRACT:
A dampening system for a printing apparatus includes a print plate, a printing cylinder contacting the print plate and adapted to supply water to the print plate, a feed device for feeding water to the printing cylinder, and a dampening roller adapted to transfer water from the feed means to the printing cylinder. The dampening roller comprises a roller having a dampening layer composed of a substrate through which is dispersed a plurality of minute hollow bodies. A plurality of the hollow bodies open towards the circumferential surface to form cells for transferring the water from the feed means to the printing cylinder. At least one of the size and the concentration of the hollow bodies dispersed within the substrate is selected depending on the amount of dampening water to be fed to the print plate.

REFERENCES:
patent: 2804678 (1957-09-01), Rockoff
patent: 3835597 (1974-09-01), Wasil
patent: 4301730 (1981-11-01), Heurich et al.
patent: 4567827 (1986-02-01), Fadner
patent: 4860652 (1989-08-01), Kawata

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