Process and apparatus for internally coating a tubing

Details Process and apparatus for internally coating a tubing Process and apparatus for internally coating a tubing

1982-03-30

1983-08-09

Hoffman, James R.

Coating processes

Interior of hollow article coating

Vacuum or pressure utilized

118 56, 118105, B05C 704, B05D 722

Patent

active

043978916

ABSTRACT:
A process and apparatus for coating the interior of a fiber-reinforced tube formed of cellulose hydrate in which a tube filled with a coating liquid is passed through a special conveying and pumping device which also serves to replenish the coating liquid. Above the level of the coating liquid, the tube is inflated with a support gas and is gradually flattened. The flattened tube then travels through a metering device made up of wipers in the form of doctor blades or rollers, which retain the major quantity of the coating liquid which is present on the inside surface of the tubing so that a thin, uniform film of the coating liquid is formed. The tubing is thereafter dried to remove the volatile constituents of the coating liquid, and is subsequently wound up.

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patent: 2901358 (1959-08-01), Underwood et al.
patent: 3378379 (1969-04-01), Shiner et al.
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patent: 3567495 (1971-03-01), Gajdos
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patent: 4233341 (1980-11-01), Hammer et al.
patent: 4287217 (1981-09-01), Hammer et al.
patent: 4353939 (1982-10-01), Becker et al.
patent: 4353940 (1982-10-01), Becker et al.
patent: 4357371 (1982-11-01), Heinrich et al.

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