Title:
スパークプラグ及びその製造方法
Document Type and Number:
Japanese Patent JP5039138
Kind Code:
B2
Abstract:
A spark plug and method of manufacturing the same. The spark plug includes a tubular insulator holding a center electrode, and a tubular metallic shell holding the insulator. The insulator is inserted into the metallic shell from the rear end side thereof until a portion of the insulator engages the metallic shell. In this state, the circumferential edge of the rear end portion of the metallic shell is crimped, whereby the insulator is unitarily fixed to the metallic shell. A talc charged layer is formed in a clearance portion between the insulator and the metallic shell, and a wire packing is placed on a rear end portion of the talc charged layer for engaging the crimp portion. A portion of the talc charged layer is interposed between the wire packing and the rear trunk portion of the insulator.
Inventors:
Akira Suzuki
Application Number:
JP2009528540A
Publication Date:
October 03, 2012
Filing Date:
March 26, 2009
Export Citation:
Assignee:
Nippon Special Ceramics Co., Ltd.
International Classes:
H01T13/36; H01T13/20; H01T21/02
Domestic Patent References:
| JP2006092955A | 2006-04-06 | |||
| JPH11111424A | 1999-04-23 | |||
| JP2003257582A | 2003-09-12 |
Attorney, Agent or Firm:
Mitsuo Kawaguchi