Plastic tube with longitudinal channels in the wall

Details Plastic tube with longitudinal channels in the wall Plastic tube with longitudinal channels in the wall

1982-12-20

1984-04-03

Bryant, III, James E.

Pipes and tubular conduits

Plural duct

Longitudinally extending common wall

138111, 138114, 138148, F16L 918

Patent

active

044401957

ABSTRACT:
Tube of thermoplastic material, comprising longitudinal channels of rounded cross section and having such wall stresses that, after axially cutting the tube, the edge parts beside the cut edges overlap each other for less than 5% of the outer circumference of the tube.

REFERENCES:
patent: 3110754 (1963-11-01), Witort et al.
patent: 3668288 (1972-06-01), Takahashi
patent: 3941157 (1976-03-01), Barnett

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