Apparatus and method for anodizing supports for lithographic pri

Details Apparatus and method for anodizing supports for lithographic pri Apparatus and method for anodizing supports for lithographic pri

1992-06-22

1994-05-24

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Coating moving substrate

204206, C25D 500

Patent

active

053146077

ABSTRACT:
An apparatus for anodizing a support for a lithographic printing plate which comprises a backing roller which guides a web made of aluminum or an alloy thereof in a state of contacting the backing roller, (an) electrode(s) which is/are arranged along the peripheral surface of the backing roller in a concentric arc, an electric supplier which is provided at least on the upstream side or the downstream side of the backing roller, and an electrolyte solution which fills the clearance between the backing roller and the electrode, and an anodizing method using the same. By using the apparatus, the electric voltage loss can be reduced in electrolyte solution, and only a single surface of the supports is anodized without the necessity for providing any special means. Anodizing can be conducted at a high speed and the thickness of anodized layer easily increased. Moreover, thin supports can be anodized without fusion troubles.

REFERENCES:
patent: Re29754 (1978-09-01), Fromson
patent: Re31901 (1985-05-01), Kawai et al.
patent: 3691030 (1972-09-01), Stroszynski
patent: 5094733 (1992-03-01), Kaneko et al.
"Electroplating" Book of Frederick A. Lowenhein pp. 452-3 (1979), published by American Electroplaters' Society.

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