Method of producing a channeled plastic pipe with closed channel

Details Method of producing a channeled plastic pipe with closed channel Method of producing a channeled plastic pipe with closed channel

1982-03-01

1984-10-02

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264263, 264322, 425DIG218, B29D 2300

Patent

active

044747268

ABSTRACT:
A method of producing plastic pipe having air channels axially extending through the wall thereof, with at least one of the respective ends of the air channels being closed by an annular slotted channel-closure filled with a caulking material in its annular slot. The channel-closure is force-fitted on the pipe end, so that the caulking material is pressed into the air channels.

REFERENCES:
patent: 4065243 (1977-12-01), Ada et al.
patent: 4279853 (1981-07-01), Ohta et al.
patent: 4338716 (1982-07-01), Marissen et al.
patent: 4344461 (1982-08-01), Beune
patent: 4390383 (1983-06-01), van Dongeren

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