Method of forming thermoplastic perforated sheet

Details Method of forming thermoplastic perforated sheet Method of forming thermoplastic perforated sheet

1984-04-13

1985-11-26

Silbaugh, Jan

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Stretching or stretch forming

264219, 264313, 264324, 425398, 425399, 425400, B29C 1702, B29C 102

Patent

active

045553785

ABSTRACT:
Apparatus and method for forming curved needlepoint canvases from initially flat perforated sheet by applying pressure to a first side of the sheet, thus driving and deforming it into an aperture in a die, and by supporting the opposite side of the sheet during deformation with a pressure pad which includes a recess into which the deformed sheet is driven.

REFERENCES:
patent: 2190807 (1940-02-01), Steinberger
patent: 2867889 (1959-01-01), Thompson, Jr.
patent: 2942297 (1960-06-01), Michalko
patent: 3584109 (1971-06-01), Meadors et al.
patent: 4008029 (1977-02-01), Shokite
patent: 4127374 (1978-11-01), Ammeraal

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