Lithographic dampener

Details Lithographic dampener Lithographic dampener

1996-02-12

1999-11-09

Fisher, J. Reed

Printing

Planographic

Dampeners

B41F 726, B41F 732, B41F 736

Patent

active

059793147

ABSTRACT:
A continuous seal type lithographic dampener is fitted with a one-piece metering roller which has a continuous surface coating of flame sprayed (as by plasma arc) chromium oxide particles providing a porous surface which is filled with a pore occluding sealer. The resulting cylindrical surface is than ground to a finish in the order of 20 to 30 micro inches. A finish coat of sealer is applied to the surface of the roller. The resultant metering roller is highly wear resistant and hydrophobic, having a surface energy in the order of 30 to 40 dynes/cm.

REFERENCES:
patent: 4301730 (1981-11-01), Heurich et al.
patent: 4455938 (1984-06-01), Loudon
patent: 4887528 (1989-12-01), Ruge et al.
patent: 4901640 (1990-02-01), Niemiro et al.
patent: 4932319 (1990-06-01), Switall
patent: 4991501 (1991-02-01), Yokoyama et al.
patent: 5093180 (1992-03-01), Morgan

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