Apparatus for forming polycarbonate sheeting

Details Apparatus for forming polycarbonate sheeting Apparatus for forming polycarbonate sheeting

1990-12-04

1991-09-17

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

65287, 72128, B29C 5304, B29C 5324

Patent

active

050490591

ABSTRACT:
The invention relates to an apparatus for forming twin-wall polycarbonate sheets into desired arcuate forms to be used for example for awnings. The apparatus is distinguished from known forming apparatus which are generally not effective in forming the polycarbonate sheets hereinafter described.
The apparatus generally comprises means for preheating a portion of the polycarbonate sheet, engaging the sheet with the mould which is pivotally mounted to the frame of the apparatus, frictionally restraining the movement of the sheet with respect to the frame at a position spaced from the mould, and pivoting the mould so as to form the sheet.
The present invention generally overcomes the difficulties in forming twin-walled polycarbonate sheets thereby allowing the material to be used in place of other conventional awning materials such as fibreglass and corrugated iron.

REFERENCES:
patent: 2518896 (1950-08-01), Jendrisak
patent: 3103430 (1963-09-01), Jehdrisak
patent: 3116993 (1964-01-01), Richardson
patent: 3251672 (1966-05-01), Touvay et al.
patent: 3340037 (1967-09-01), Stevenson
patent: 4022045 (1977-05-01), Riha
patent: 4254649 (1981-03-01), Cervenka et al.

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