Thermoformer for forming and heat bonding a thermoplastic sheet to a substrate
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United States of America Patent
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Aug 15, 2006
Issued Date -
N/A
app pub date -
Nov 12, 2003
filing date -
Nov 26, 1999
priority date (Note) -
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Abstract
A thermoforming apparatus for forming sheets of sheet plastic onto a substrate in which a retractable substrate heater is able to be positioned over a substrate loaded into the press and energized while a plastic sheet is being heated in an oven included in the thermoformer apparatus. The plastic sheets are cut from a strip pulled from a roll of sheet material, the roll supported for side to side movement and driven by a servomotor responsive to error signals generated by a strip edge sensor to compensate for wandering of a strip edge to thereby insure accurate location of plastic sheets cut from the unwound strip.
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