Dampening water feed roller for planographic printing press

Details Dampening water feed roller for planographic printing press Dampening water feed roller for planographic printing press

1989-08-08

1991-02-12

Crowder, Clifford D.

Printing

Planographic

Dampeners

2989532, 29132, B41F 726

Patent

active

049915010

ABSTRACT:
A dampening water feed roller, characterized by a process of manufacturing which comprises forming a flame sprayed layer of a ceramic material composed of Al.sub.2 O.sub.3, TiO.sub.2, or a mixture of Al.sub.2 O.sub.3 and TiO.sub.2 on the peripheral surface of a metallic roller, subjecting the flame sprayed ceramic layer to a pore-occluding treatment with a hydrophilic SiO.sub.2 type inorganic pore-occluding agent, and grinding the treated layer to surface roughness of not more than 1.6 S. The roller permits supply of the dampening water without using the additives such as isopropyl alcohol in the dampening water.

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