Optical fiber preform manufacturing apparatus which measures a v

Details Optical fiber preform manufacturing apparatus which measures a v Optical fiber preform manufacturing apparatus which measures a v

1994-11-09

1997-04-29

Hoffmann, John

Glass manufacturing

Fiber making apparatus

With measuring, controlling, sensing, timing, inspecting,...

65486, 73862621, 73862627, 73862628, 73788, 73819, C03B 3707

Patent

active

056244746

ABSTRACT:
An optical fiber preform manufacturing apparatus which continuously monitors the weight of a preform during manufacturing by a load cell without increasing the offset amount of the preform. The preform manufacturing apparatus includes a rotary chuck unit vertically moved by an elevating unit and a rod gripped by the rotary chuck unit and vertically extending downward. At the time of manufacturing a preform, the elevating unit and the rotary chuck unit are driven to rotate and move a starting rod suspended from the lower end of the rod upward. A support plate is fixed to the rotary chuck unit. Three or more load cells are arranged between the support plate and an elevating plate of the elevating unit. The rotary chuck unit is firmly supported by these load cells, so that the rotating shaft is not inclined. A hole is formed in the elevating plate, and the rotary chuck unit extends through the hole with a gap therebetween. A load by the support plate, the rotary chuck unit, the seed rod, a starting rod and the preform acts on the load cells. Therefore, the weight of the preform can be detected from an output from the load cells.

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Patent Abstracts of Japan, vol. 11, No. 30 (C-400) 29 Jan. 1987 & JP-A-61 201 638 (Sumitomo Electric Industries Co. Ltd.) 6 Sep. 1986.

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