Triple sheet thermoforming apparatus
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United States of America Patent
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Jun 15, 2004
Grant Date -
May 16, 2002
app pub date -
Jul 5, 2001
filing date -
Aug 20, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A thermoforming machine for manufacturing triple sheet thermoplastic articles is disclosed. The thermoforming machine comprises three controllable ovens for heating three sheets to a heat deformable temperature, three shape giving molds for separately thermoforming each sheet in succession, and forging-like means to compress the three thermoformed sheets into a unitary article. The three sheets are thermoformed and compressed together in a form station comprising upper and lower platens. Acting with the upper platen is a mold shuttle system for moving two of three molds into position relative the thermoforming and forging-like operations of the apparatus.
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