Apparatus and method for folding a sheet of material

Details Apparatus and method for folding a sheet of material Apparatus and method for folding a sheet of material

1978-05-24

1979-05-08

Hoag, W. E.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Plural sequential shaping or molding steps on same workpiece

264296, 264322, 264339, B29C 1702, B29D 2310

Patent

active

041536657

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: 2701271 (1955-02-01), Mautner et al.
patent: 2892217 (1959-06-01), Luboshez
patent: 3450566 (1969-06-01), Solomon et al.
patent: 3557277 (1971-01-01), Broderson et al.
patent: 3816044 (1974-06-01), Nielsen et al.

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