Method and apparatus for shaping thermoplastic sheets

Details Method and apparatus for shaping thermoplastic sheets Method and apparatus for shaping thermoplastic sheets

1980-03-28

1981-05-12

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Stretching or stretch forming

425383, 425384, 425DIG53, B29C 1702

Patent

active

042671400

ABSTRACT:
A method of and apparatus for stretching and shaping generally rectangular, refrigerated, thermoplastic sheets for ultimate use as interlayers in curved laminated glass units. The apparatus includes a frame assembly having spaced apart clamping assemblies for supporting the transverse edges of the sheets and means for urging the clamping assemblies apart during the heat-softening of the sheets to laterally stretch and distort the sheets into their final desired shapes.

REFERENCES:
patent: 2885732 (1959-05-01), Kazmaier et al.
patent: 3341889 (1967-09-01), Miller et al.
patent: 3419651 (1968-12-01), Miller et al.

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