Method of forming stretched acrylic sheets

Details Method of forming stretched acrylic sheets Method of forming stretched acrylic sheets

1981-10-21

1982-11-30

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 27, 264162, 264235, 264291, 264292, 264293, 264322, 264346, B29D 722, B29C 1712

Patent

active

043615279

ABSTRACT:
A stretched acrylic sheet which is to be formed into a vision panel at an elevated temperature has its major surfaces reheated to an elevated temperature to intentionally generate a class of surface formations thereon for subsequent removal by polishing prior to the formation of the final vision panel. Such surface deformations are otherwise undesirably generated during vision panel formation and detract from the optical quality of the final product.

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patent: 3562383 (1971-02-01), Ayres
patent: 3632841 (1972-01-01), Fortin
patent: 3668053 (1972-06-01), Ayres
patent: 3784655 (1974-01-01), Lewchuck et al.
patent: 3808077 (1974-04-01), Rieser et al.
patent: 3937863 (1976-02-01), Moore
patent: 4078107 (1978-03-01), Bitterice et al.
patent: 4231827 (1980-11-01), Wilson et al.

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