Title:
METHOD FOR PRODUCING OPTICAL FIBER
Document Type and Number:
WIPO Patent Application WO/2012/090427
Kind Code:
A1
Abstract:
Provided is a method for producing an optical fiber capable of preventing or reducing problems caused when forming a coating layer on a drawn optical fiber, such as entrapment of bubbles in the coating layer or unevenness of the coating layer. The method according to one embodiment of the present invention comprises a step of delivering resin liquid from a resin supply hose (24) connected to a storage tank (23) to coating devices (4, 6) and applying the resin liquid to an optical fiber in the coating devices (4, 6) to form a coating layer. Said method comprises, prior to the step of forming a coating layer, steps (steps S31, S32) of delivering the resin liquid from the resin supply hose (24) to a cup (22) which is separate from the coating devices, and measuring the delivery amount of the resin liquid, and a step (step S33) of determining whether or not the measured delivery amount of the resin liquid is within a permissible range, and if the measured delivery amount of the resin liquid is within a permissible range as a result of the determination, conducts a step (step S34) of forming the coating layer.
Inventors:
UI, Keisuke (2-3, Marunouchi 2-chome, Chiyoda-k, Tokyo 22, 〒1008322, JP)
Application Number:
JP2011/007081
Publication Date:
July 05, 2012
Filing Date:
December 19, 2011
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO., LTD. (2-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 22, 〒1008322, JP)
古河電気工業株式会社 (〒22 東京都千代田区丸の内２丁目２番３号 Tokyo, 〒1008322, JP)
古河電気工業株式会社 (〒22 東京都千代田区丸の内２丁目２番３号 Tokyo, 〒1008322, JP)
International Classes:
C03C25/10; G02B6/44
Attorney, Agent or Firm:
OKABE, Yuzuru et al. (No.602, Fuji Bldg. 2-3, Marunouchi 3-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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