Thermoplastic film production

Details Thermoplastic film production Thermoplastic film production

1971-07-21

1977-08-23

Kucia, Richard R.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

204168, 204280, 264169, 264216, 425113, 425115, B29F 306

Patent

active

RE0293709

ABSTRACT:
In a process for extruding thermoplastic film means are provided for maintaining substantially free from deposit a wire electrode which is used to deposit an electrostatic charge on to the upper surface of the film. In a preferred embodiment the wire electrode is continuously unwound from a first reel on to a second reel. The wire electrode is kept substantially free of deposit by means of either a scraper plate or a current of air which is passed between the film and the wire electrode to prevent deposits from forming.

REFERENCES:
patent: 2556247 (1951-06-01), Zeigler
patent: 3068528 (1962-12-01), Owen
patent: 3196063 (1965-07-01), Paquin
patent: 3223757 (1965-12-01), Owens
patent: 3244786 (1966-04-01), Bild
patent: 3274302 (1966-09-01), Anderson
patent: 3470274 (1969-09-01), Sandiford

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