Method and apparatus for use in coating an elongate filament

Details Method and apparatus for use in coating an elongate filament Method and apparatus for use in coating an elongate filament

B - Operations, Transporting

05

C

18/103, 18/752

B05C 3/12 (2006.01) B05D 7/20 (2006.01) B29D 11/00 (2006.01) C03C 25/18 (2006.01)

Patent

CA 1177614

METHOD AND APPARATUS FOR USE IN COATING AN ELONGATE FILAMENT Abstract of the Disclosure To uniformly coat a fiber, it is fed downwards through a passage filled with a coating fluid. The passage has a downwardly tapering lower zone into which fluid is directed from outside the passage uniformly, radially inwardly and downwardly. The fluid directed into the lower zone suppresses turbulence within the fluid at a bottom outlet aperture within the lower zone. The passage at an upper zone is large enough to allow bubbles to float to the surface of the fluid. The arrangement prevents turbulence and air bubbles from causing thinly coated fiber regions which might adversely affect the fiber integrity. The passage is defined by two relatively moveable bodies so that the rate at which the coating fluid is injected into the lower zone can be varied. - i -

441786

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