Method of forming a coating application roll

Details Method of forming a coating application roll Method of forming a coating application roll

1978-10-10

1980-08-19

Husar, Francis S.

Metal deforming

By shot-blasting

291218, 118258, C21D 706

Patent

active

042177693

ABSTRACT:
A method for making an application or dip roll for applying a coating, such as an aqueous clay and starch solution, from a trough, onto a moving web on a papermaking or coating machine. The roll comprises a roll cylinder having a hard, outer surface which is not subject to attack by the coating to be used. A plurality of minute indentations are formed in the outer surface of the roll to enhance the transfer of coating from the trough to the roll. Preferably, the roll is first provided with a smooth surface finish. Then the plurality of indentations are formed by shot blasting the outer surface of the roll with hard shot. If a shot of a material subject to attack by the coating is used, the roll may be subsequently blasted with another material, not subject to such attack, so as to remove any fragments of the first shot that might have become embedded in the roll.

REFERENCES:
patent: 3177558 (1965-04-01), Gronholz
patent: 3379170 (1968-04-01), Thomas
patent: 3412479 (1968-11-01), Markovic
patent: 4026007 (1977-05-01), Brower

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