Plastics pipes having walls with lengthwise extending channels

Details Plastics pipes having walls with lengthwise extending channels Plastics pipes having walls with lengthwise extending channels

1980-12-29

1982-07-27

Bryant, III, James E.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

138109, 138155, 138148, 138115, 285138, 285344, 285345, F16J 1510

Patent

active

043413927

ABSTRACT:
Plastic pipes comprising an inner and outer wall being interconnected by lengthwise extending connecting partitions, forming channels, the ends of the channels being each separately sealed by sealingly pressing the end walls of a channel to each other after these walls have been heated to a temperature surpassing the plasticizing temperature.

REFERENCES:
patent: 3464450 (1969-09-01), Steffenini
patent: 4034994 (1977-07-01), Ohta et al.
patent: 4280534 (1981-07-01), van Dongeren

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