METHOD AND DEVICE FOR HEATING A FILM
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United States of America Patent
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Issued Date -
Jan 10, 2013
app pub date -
Jul 5, 2012
filing date -
Jul 6, 2011
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Abandoned
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Abstract
The invention relates generally to a method for contact-free heating a thermoformable film prior to deforming the thermoformable film. Heating is carried out by at least one heater having at least one porous surface which faces the film and through which air flows. An air film is formed between the porous surface and the thermoformable film due to the flow of air through the porous surface. The invention also relates to a heating unit for contact-free heating a thermoformable film as well as to a packaging machine that includes such a heating unit.
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