Apparatus for folding a sheet of plastic material

Details Apparatus for folding a sheet of plastic material Apparatus for folding a sheet of plastic material

1974-12-23

1977-01-11

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

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

Surface deformation means only

264296, 264339, 270 83, 425398, B29C 1702

Patent

active

040024172

ABSTRACT:
An apparatus for folding a sheet of relatively brittle material in which an articulated frame assembly is mounted relative to a support structure in a manner so that two portions of the frame assembly can pivot relative to each other in an angular direction to fold the sheet about a fold line intermediate the ends of the sheet. Each portion of the frame assembly includes a movable portion which is adapted to fold the outer end portion of the sheet about an additional fold line intermediate the first fold lines and the outer edge portion. The sheet is heated along the fold lines prior to the folding operations.

REFERENCES:
patent: 2420119 (1947-05-01), Boehm et al.
patent: 3115678 (1963-12-01), Keen et al.
patent: 3466919 (1969-09-01), Bledstein
patent: 3668033 (1972-06-01), Evans
patent: 3816044 (1973-02-01), Nielsen et al.
Taber Instrument Corporation, Taber Thermofold, Aug. 4, 1950.

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