Methods for bending stretched synthetic resin sheets

Details Methods for bending stretched synthetic resin sheets Methods for bending stretched synthetic resin sheets

1976-07-27

1979-05-08

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

264230, B29C 1702

Patent

active

041536630

ABSTRACT:
Methods and apparatus are disclosed for bending mono-axially or bi-axially stretched sheets of a thermoplastically deformable synthetic resin by heating one side of the sheet above the softening temperature of the resin while the temperature on the other side is beneath the softening temperature, whereupon the resin sheet bends by itself or can be bent with forming tools.

REFERENCES:
patent: 2660761 (1953-12-01), Peters
patent: 3000057 (1961-09-01), Swedlow
patent: 3077040 (1963-02-01), Steiber
patent: 3414181 (1968-12-01), Sloan
patent: 3546754 (1970-12-01), Erb
patent: 3661694 (1972-05-01), Bequet
patent: 3684642 (1972-08-01), Rogers
patent: 3751328 (1973-08-01), Roberts
patent: 3885015 (1975-05-01), Ono et al.
patent: 3984517 (1976-10-01), Bequet

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