Method of pigmentation control for thermoplastic film

Details Method of pigmentation control for thermoplastic film Method of pigmentation control for thermoplastic film

1974-12-23

1976-12-21

Wise, Edward J.

Registers

Transfer mechanism

Traveling pawl

23515135, 425141, G01D 2100, G06F 1546

Patent

active

039990451

ABSTRACT:
A nucleonic thickness gauge measures the total electron density of a pigmented thermoplastic film from which a product density and thickness may be derived. The amount of pigment admixed with the thermoplastic film resin in an extruder is controlled in response to a comparison between the thickness measured with the nucleonic gauge and the thickness determined from the actual product weight.

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patent: 3122783 (1964-03-01), Jolliffe et al.
patent: 3212127 (1965-10-01), Flook, Jr. et al.
patent: 3286302 (1966-11-01), Doering
patent: 3378676 (1968-04-01), Clement
patent: 3510374 (1970-05-01), Walker
patent: 3596071 (1971-07-01), Doering
patent: 3737265 (1973-06-01), Schafer et al.
patent: 3841147 (1974-10-01), Coil et al.

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