EP 1448023 B1 20050629 - Method for manufacturing sheathed heater and method for manufacturing glow plug
Title (en)
Method for manufacturing sheathed heater and method for manufacturing glow plug
Title (de)
Verfahren zur Herstellung eines Patronenheizkörpers und Verfahren zur Herstellung einer Glühkerze
Title (fr)
Procédé de fabrication d'un élément chauffant blindé et procédé de fabrication d'une bougie à incandescence
Publication
Application
Priority
- JP 2003035559 A 20030213
- JP 2003430523 A 20031225
Abstract (en)
[origin: EP1448023A1] A sheathed heater (3) is manufactured by a method in which, after an insulating powder (3d) and a coil (3b) are confined in a metallic sheath (3a), the metallic sheath (3a) is swaged to a reduced diameter. The method is characterized in that before the metallic sheath (3a) is swaged, the coil (3b) is annealed through application of heat to the coil (3b). Since the coil (3b) is softened through annealing, while following a reduction in the diameter of the metallic sheath (3a) effected by swaging, the coil (3b) reduces its diameter without involvement of deformation, such as crinkling, bending, or corrugation. <IMAGE>
IPC 1-7
IPC 8 full level
F23Q 7/00 (2006.01); H05B 3/12 (2006.01); H05B 3/14 (2006.01); H05B 3/48 (2006.01)
CPC (source: EP)
F23Q 7/001 (2013.01); H05B 3/141 (2013.01); F23Q 2007/004 (2013.01); H05B 2203/027 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 1448023 A1 20040818; EP 1448023 B1 20050629; DE 602004000022 D1 20050804; DE 602004000022 T2 20051208; JP 2004264013 A 20040924; JP 4233998 B2 20090304
DOCDB simple family (application)
EP 04250764 A 20040212; DE 602004000022 T 20040212; JP 2003430523 A 20031225