The welding sleeve has a coil of a resistance wire forming two heating zones and is arranged near the inner circumference of the sleeve. Each heating zone has a region at the beginning and end in which the coil spacing is less than in the center region.
申请公布号
DE4332196(C2)
申请公布日期
1996.09.19
申请号
DE19934332196
申请日期
1993.09.22
申请人
GEORG FISCHER ROHRLEITUNGSSYSTEME AG, SCHAFFHAUSEN, CH
发明人
STEINMETZ, HANS W., SCHAFFHAUSEN, CH;PETRY, DIRK A., FEUERTHALEN, CH