Preform manufacturing method

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9604868
APP PUB NO 20160229733A1
SERIAL NO

14378738

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A preform manufacturing method of the present invention has a hole forming step of forming a plurality of holes in a glass body to produce a glass pipe, and a heating integration step of heating the glass pipe with core rods including core portions being inserted in the respective holes, thereby to implement integration of the core rods and the glass pipe. In the hole forming step, a peripheral hole out of the holes to be formed in the glass body is formed at a position determined in consideration of positional variation of the core portion before and after the integration.

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Patent Owner(s)

  • SUMITOMO ELECTRIC INDUSTRIES, LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nakanishi, Tetsuya Yokohama, JP 146 1047
Taru, Toshiki Yokohama, JP 34 199

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