Method of shaping sheets using gravity

Details Method of shaping sheets using gravity Method of shaping sheets using gravity

1990-05-14

1992-01-28

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264 27, 264322, B29C 5304

Patent

active

050842269

ABSTRACT:
Method and apparatus for forming thermoplastic materials provides for supporting a sheet of thermoplastic material on a support spanning a former, heating the sheet of thermoplastic material to a predetermined temperature to render the thermoplastic material plastic, thereby permitting the support and the sheet of thermoplastic material supported thereon to depend downwardly by gravity into the former, and allowing the sheet of thermoplastic material to cool in a shape at least partially defined by the former.

REFERENCES:
patent: 1815992 (1931-07-01), Sherts et al.
patent: 3044117 (1962-07-01), Alspach
patent: 3231647 (1966-01-01), Oesterheld
patent: 4231827 (1980-11-01), Wilson et al.
patent: 4390489 (1983-06-01), Segal
patent: 4576776 (1986-03-01), Anderson

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