Title:
METHOD AND APPARATUS FOR PRODUCING HOLLOW CORE ELEMENT FOR DIFFERENTIAL TRANSMISSION CABLE
Document Type and Number:
WIPO Patent Application WO/2010/095336
Kind Code:
A1
Abstract:
Provided are a method and an apparatus for producing a hollow core element for a differential transmission cable, wherein the skew is not more than 10 ps/m.
An insulation coating element composed of an insulating resin, which is comprised of an inner annular portion, an outer annular portion, and a plurality of coupling portions for coupling these annular portions, is formed around an inner conductor (1) by an extruder (22) provided with a die (22a). After that, the insulation coating element is cooled by a cooling portion 23 of a water-cooling, air-cooling, or heating-cooling system. The cooling conditions are adjusted in accordance with the variation of the permittivity (εr) of the hollow core element (11).
Inventors:
TANAKA Seiji (1-1-7, Higashi-Nihonbashi, Chuo-k, Tokyo 04, 〒1030004, JP)
田中 晴士 (〒04 東京都中央区東日本橋１－１－７ 宇部日東化成株式会社内 Tokyo, 〒1030004, JP)
田中 晴士 (〒04 東京都中央区東日本橋１－１－７ 宇部日東化成株式会社内 Tokyo, 〒1030004, JP)
Application Number:
JP2009/071017
Publication Date:
August 26, 2010
Filing Date:
December 17, 2009
Export Citation:
Assignee:
UBE-NITTO KASEI CO., LTD. (1-1-7, Higashi-Nihonbashi Chuo-k, Tokyo 04, 〒1030004, JP)
宇部日東化成株式会社 (〒04 東京都中央区東日本橋１－１－７ Tokyo, 〒1030004, JP)
TANAKA Seiji (1-1-7, Higashi-Nihonbashi, Chuo-k, Tokyo 04, 〒1030004, JP)
宇部日東化成株式会社 (〒04 東京都中央区東日本橋１－１－７ Tokyo, 〒1030004, JP)
TANAKA Seiji (1-1-7, Higashi-Nihonbashi, Chuo-k, Tokyo 04, 〒1030004, JP)
International Classes:
H01B13/016; H01B13/00
Attorney, Agent or Firm:
WATANABE Kaoru (KUNPU INTELLECTUAL PROPERTY AGENTS, SUCCESS-SENGAKUJI BLDG. 3F 2-20-29, Takanawa, Minato-k, Tokyo 74, 〒1080074, JP)
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