Optical fiber cooling process

Details Optical fiber cooling process Optical fiber cooling process

1998-08-21

2000-10-03

Doerrler, William

Refrigeration

Processes

Treating an article

61322, 65510, F25D 1306, F25B 2500, C03B 3710

Patent

active

061256382

ABSTRACT:
Hot optical fiber being drawn from a preform is cooled in a helium cooled heat exchanger by a two-stage process. In the first stage, in which the rate of draw of fiber through the heat exchanger is increased to the design draw rate, the rate of flow of helium to the heat exchanger is increased as the rate of draw of fiber is increased. Helium is withdrawn from the heat exchanger by a variable speed blower, and during the first stage the rate of withdrawal of helium from the heat exchanger is controlled primarily by the rate of flow of helium into the heat exchanger, and during the second stage, the rate of flow of helium to the heat exchanger is maintained constant and the rate of withdrawal is determined primarily by the pressure in the heat exchanger.

REFERENCES:
patent: 4627244 (1986-12-01), Willhoft
patent: 5377491 (1995-01-01), Schulte
patent: 5452583 (1995-09-01), Schulte
patent: 5568728 (1996-10-01), Sapsford
patent: 5897682 (1999-04-01), Koaizawa et al.

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