Device for regulating the heating of a thermoplastic band used i

Details Device for regulating the heating of a thermoplastic band used i Device for regulating the heating of a thermoplastic band used i

1987-07-29

1988-07-19

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Temperature control

264 406, 264322, 264551, 425384, 425398, 425519, B29C 5142, B29C 5146

Patent

active

047581450

ABSTRACT:
This invention relates to an apparatus for regulating the heating of a thermoplastic band used in a station for thermoforming upwardly open containers, the apparatus 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.

REFERENCES:
patent: 2962758 (1960-12-01), Politis
patent: 3412183 (1968-11-01), Anderson et al.
patent: 3746497 (1973-07-01), Neil
patent: 3787158 (1974-01-01), Brown et al.
patent: 4039609 (1977-08-01), Thiel et al.
patent: 4140457 (1979-02-01), Miki et al.
patent: 4409173 (1983-10-01), Padovani
patent: 4436685 (1984-03-01), Emura et al.
patent: 4438054 (1984-03-01), Holden
patent: 4462786 (1984-07-01), Perryman
patent: 4508670 (1985-04-01), Janke

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