Method of producing blown thermoplastic foil with low thickness

Details Method of producing blown thermoplastic foil with low thickness Method of producing blown thermoplastic foil with low thickness

1986-05-20

1987-12-08

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 406, 264564, 425140, 425143, 4253261, B29C 4792

Patent

active

047117478

ABSTRACT:
A method of producing a thermoplastic foil with reduced thickness tolerances in which close to the head the temperatures of the mass flow emerging from the heat at various regions corresponding to tempering sectors are detected, the temperature measurements are averaged and the averages are used to form a set point value with which the individual averages are compared and the comparison used to generate a correction signal which is applied to the temperature controller of the respective sector.

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patent: 4425290 (1984-01-01), Upmeier
patent: 4464318 (1984-08-01), Upmeier et al.
patent: 4488861 (1984-12-01), Reifenhauser

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