Method of making plastic pipes having walls with lengthwise exte

Details Method of making plastic pipes having walls with lengthwise exte Method of making plastic pipes having walls with lengthwise exte

1981-03-25

1983-06-28

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

138109, 138115, 138148, 138172, 156198, 156293, 156294, 1563042, 1563045, 1563046, 1563082, 264310, 264322, 285133R, 285137R, 285138, 285288, B29C 1100, F16L 918

Patent

active

043903835

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: 1218895 (1917-03-01), Porter
patent: 1746132 (1930-02-01), Stokes
patent: 2126075 (1930-08-01), Wright
patent: 3217077 (1965-11-01), Colke
patent: 3725522 (1973-04-01), Sheridan et al.
patent: 3895830 (1975-07-01), Mudlem
patent: 4085185 (1978-04-01), Adair

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