发明名称 |
SCHWEISSMUFFE FUER THERMOPLASTISCHE MATERIALIEN, VERFAHREN UND VORRICHTUNG ZU DEREN HERSTELLUNG. |
摘要 |
A welding sleeve useable for connecting of pipes formed from thermoplastic material, is formed from a tubular body of thermoplastic material and a coil disposed on its inside surface. The coil has a resistance wire encased with thermoplastic material. The windings of the coil (4) are bonded into a compact coil which is inserted into the heated tubular body while it is simultaneously widened. As the result of a partial contraction of the tubular body also of the coil a firm connection develops between the oil and the body. Furthermore, the tubular body has a frozen-in, latent, radial contraction strain as a result of the widening, which during heating during the welding process, eliminates the radial play between coil and the pipes and produces a welding pressure. |
申请公布号 |
CH644054(A5) |
申请公布日期 |
1984.07.13 |
申请号 |
CH19800002531 |
申请日期 |
1980.03.31 |
申请人 |
FISCHER, GEORG, AG, SCHAFFHAUSEN |
发明人 |
ALFRED THALMANN |
分类号 |
B29C65/00;B29C53/00;B29C55/24;B29C61/00;B29C61/06;B29C63/18;B29C65/20;B29C65/22;B29C65/34;B29C65/68;B29D23/00;F16L47/03;F16L47/06 |
主分类号 |
B29C65/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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