Process for regulating the heating of a thermoplastic band used in a thermoforming station
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United States of America Patent
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Mar 21, 1989
Issued Date -
N/A
app pub date -
May 11, 1988
filing date -
Jul 31, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for regulating the heating of a thermoplastic band used in a station for thermoforming upwardly open containers, the process being characterized in that, in a zone of the softened thermoplastic band, zone surrounded by a mesh of rigidified matter, the degree of deformation of this zone under the action of a predetermined mass is measured, the measured value of the degree of deformation is compared with a predetermined reference value corresponding to a good aptitude to thermoforming, and the heating of the band is regulated as a function of the value of deformation measured so that the deformation corresponds to the reference value.
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