发明名称 BOUT FEMELLE D'UN RACCORD MALE ET FEMELLE ET SON PROCEDE DE FABRICATION
摘要 The end of a thermoplastic pipe is converted into a socket by softening and dilating the end of the pipe to accept a prefabricated insert which is grooe to locate an internal annular seal. The insert is bonded to the inside of the pipe mount, at least at zones at or near both ends of the socket by adhesive or fusion welding. Used esp. for mfg. socket ends on pressure pipe without shortening the original pipe length. The insert compensates for loss of strength of the original pipe wall by thinning during dilation. Method has partic. reference to forming coupling sockets on PVC pipes.
申请公布号 LU80108(A1) 申请公布日期 1979.05.15
申请号 LU19780080108 申请日期 1978.08.16
申请人 JOHNS MANVILLE CORP 发明人 WHALEN K;RODRIGO P;RUEHL D;FRENCH D
分类号 F16L21/02;B29C53/00;B29C65/00;B29C65/06;B29C65/34;B29C65/36;B29C65/66;F16L47/08 主分类号 F16L21/02
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