Method of making a pipe having a socket

Details Method of making a pipe having a socket Method of making a pipe having a socket

2005-03-01

2005-03-01

Tentoni, Leo B. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

With internal application of fluid pressure

C264S294000, C264S296000, C264S314000, C264S320000, C264S322000

Reexamination Certificate

active

06861026

ABSTRACT:
A method and an apparatus for making a pipe, and a pipe, wherein the pipe is made from a plastic feedstock pipe by expanding it against a mould. In the first step, that portion of the plastic feedstock pipe (4) which is to have a greater diameter than the rest of the pipe is partly expanded. Only after this is the entire plastic feedstock pipe (4) expanded against the mould (1).

REFERENCES:
patent: 20020073758 (2002-06-01), Rempe et al.
patent: 0133687 (1985-03-01), None
patent: 0 404 557 (1990-12-01), None
patent: 2 758 381 (1998-07-01), None
patent: 1 432 539 (1976-04-01), None
patent: 9813190 (1998-04-01), None

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