Plastic tube formed by spiral winding of a snap locking profile

Details Plastic tube formed by spiral winding of a snap locking profile Plastic tube formed by spiral winding of a snap locking profile

1980-09-05

1981-11-17

Epstein, Henry F.

Stock material or miscellaneous articles

Plural parts with edges or temporary joining means each...

24201C, 138154, 428188, F16L 916

Patent

active

043012000

ABSTRACT:
A profile strip 1 is composed of a rectangular cross-sectional body 2 having on each edge a recessed fastening means 3, 4, one male and the other female. Each fastening means 3-4 comprises an axial support flange 10, 13 which lengthens one of the exterior and interior surfaces 5, 6 of the body 2. The two adjacent flanges are abutting, and the two fastening means when engaged define, with the adjacent sides 7 of the body, a U-sectioned space which is filled by a border insert 16 having a complementary cross-section. The invention enables large diameter tubes of plastic material to be formed without any internal or external projections.

REFERENCES:
patent: 3495628 (1970-02-01), Boender
patent: 3679531 (1972-07-01), Wienand et al.

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