Plastic article or earthenware shaping or treating: apparatus – Plural reshaping means or plural vulcanizing means including... – Spaced reshaping or vulcanizing means acting on a single...
Patent
1987-07-27
1989-09-05
Nozick, Bernard
Plastic article or earthenware shaping or treating: apparatus
Plural reshaping means or plural vulcanizing means including...
Spaced reshaping or vulcanizing means acting on a single...
425363, 425384, 425392, 425403, A01J 2100
Patent
active
048633658
ABSTRACT:
A method producing deformed pipe liners from continuously extruded thermoplastic material by collapsing and bending deformable portions of the tube toward a back-up portion thereof and without elongation to maintain diameter and wall thickness, and apparatus to carry out said method and characterized by at least one back-up roller and at least one shaping roller folding the deformable portion along a line of symmetry and juxt posing a fold of the tube to the back-up portion, all at raised temperature followed by reduced temperature on a rail conforming to the deformed tube configuration.
REFERENCES:
patent: 677142 (1901-06-01), Richardson et al.
patent: 2668987 (1954-02-01), Harris et al.
patent: 2955318 (1960-10-01), Cook et al.
patent: 3371770 (1968-03-01), Graham et al.
patent: 4483167 (1984-11-01), Hayashi
Fourgaut Luc R.
Ledoux Patrick R.
Nozick Bernard
Pipe Liners, Inc.
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