Roll seal boxes for continuous vacuum treating apparatus

Details Roll seal boxes for continuous vacuum treating apparatus Roll seal boxes for continuous vacuum treating apparatus

1984-06-18

1985-02-26

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 27, 277DIG7, 118733, F16J 1540, F16J 1546

Patent

active

045014280

ABSTRACT:
A continuous vacuum treating apparatus for subjecting a workpiece of soft material, such as a plastic molding to continuous surface treatment by an air-to-air system in vacuum, including a vacuum treating chamber and a plurality of auxiliary vacuum chambers located anterior and posterior to the vacuum treating chamber. The diameter of each of an upper seal roll and a lower seal roll of each of the auxiliary vacuum chambers located on the vacuum treating chamber side is smaller than the diameter of each of an upper seal roll and a lower seal roll of the auxiliary vacuum chamber located closest to the atmosphere.

REFERENCES:
patent: 3299676 (1967-01-01), Fujihashi
patent: 3326177 (1967-06-01), Taylor
patent: 3351348 (1967-11-01), Dupuis
patent: 3367667 (1968-02-01), Allen
patent: 3467399 (1969-09-01), Kelly et al.
patent: 3643058 (1972-02-01), Long
patent: 4048953 (1977-09-01), Froberg

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