Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1981-10-29
1983-06-28
Fisher, Richard V.
Glass manufacturing
Processes
Forming product or preform from molten glass
55 97, 55485, 65 13, C03B 37025
Patent
active
043903576
ABSTRACT:
A system (20) for providing clean air to an apparatus (24) for drawing lightguide fiber (21) from a preform (22) includes a plenum (52) and ducts through which room air is pulled and filtered. The filtered air is flowed into each of a plurality of stacked enclosures (66, 67, and 68) each of which surrounds partially the drawing apparatus and portions of the preform and/or fiber. Also, the filtered air is directed transversely past the fiber and preform at a velocity which is sufficiently low to avoid undue flutter of the fiber. Filters are arranged in ascending magnitude of efficiency proceeding from an intake (41) for the room air to the vicinity of the preform and fiber. A delivery system which is associated with each drawing apparatus is considerably less expensive than a clean room and allows maintenance of any one system or its associated drawing apparatus without discontinuing the drawing operation of other systems in the same room.
REFERENCES:
patent: 4065280 (1977-12-01), Kao et al.
patent: 4333745 (1982-06-01), Zeanwick
"Weber Contamination Control Rooms," Weber Technical Products, 1975, pp. 1-16.
Myers Daryl L.
Rice Stanley
Fisher Richard V.
Somers E. W.
Western Electric Company Inc.
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