| 摘要 |
The invention relates to a clamp of thermally weldable material for a pipe (10), also of a thermally weldable, material consisting of at least two cyclindrical segments (11, 12). The segments have substantially axially parallel terminal edges (16, 17) and one or more heating mats (20) of coiled, electrically heatable conductors on their inner surfaces facing the pipe. To ensure a perfect weld it is proposed that the heating mat be solidly integrated into the concave inner surface of the segment and that it be given a contour of shreds (24, 26) bordering spaces (25, 29) along the two extreme edges of the segment. The shreds project in places beyond the extreme edges in an extension or shortening of the partial cylindricity of the segment. The gaps between them project beyond the edges at other point. The neighbouring segments in the clamp thus have a mutually complementary contour. |
