Method of manufacturing a plastic tube with longitudinal channel

Details Method of manufacturing a plastic tube with longitudinal channel Method of manufacturing a plastic tube with longitudinal channel

1980-05-09

1981-12-15

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 26, 264519, 264565, 2642094, 2642105, 264235, 264237, 264327, 264346, B29F 308

Patent

active

043058990

ABSTRACT:
This invention relates to a method of making a tube of thermoplastic material, comprising longitudinal channels of circular cross-section and having such wall stresses that, after axially cutting the tube, the edge parts along the cut edge overlap each other for less than 8% of the outer circumference of the tube.

REFERENCES:
patent: 3274315 (1966-09-01), Kawamura
patent: 3372920 (1968-03-01), Corbett
patent: 3507939 (1970-04-01), Williams et al.
patent: 3663134 (1972-05-01), Coquelin
patent: 3668288 (1972-06-01), Takahashi
patent: 3907961 (1975-09-01), Carrow
patent: 3941157 (1976-03-01), Barnett
patent: 4088724 (1978-05-01), Kuhnert

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