Device for laying a film emerging from a slot die onto a rotatin

Details Device for laying a film emerging from a slot die onto a rotatin Device for laying a film emerging from a slot die onto a rotatin

1998-10-27

2000-09-19

Pyon, Harold

Plastic article or earthenware shaping or treating: apparatus

Means applying electrical or wave energy directly to work

Electro-static or inductive field

425377, 264216, 264467, B29C 3942

Patent

active

061202789

ABSTRACT:
A device for laying a molten film 3 emerging from a slot die 2 onto a rotating take-off chill roll 1 has at least one electrode which is arranged parallel to and at a short distance from the surface of the take-off roll 1 and to which a high voltage in the range from 4 to 12 kV is applied. This electrode is, for example, a metal strip 5 which has a tapering sharp edge 6 that is oriented toward the surface of the take-off roll 1. In addition to this metal strip 5, a second electrode 27 is arranged at a distance from the surface of the take-off roll. This second electrode is a metal strip without a strip edge and has applied to it a voltage of a magnitude that is equal to or different from that of the metal strip 5. As a result, electric fields are formed in addition to the electric field from the one metal strip electrode 5.

REFERENCES:
patent: 3820929 (1974-06-01), Busby et al.
patent: 5494619 (1996-02-01), Zaretsky et al.
patent: 5975873 (1999-11-01), Zimmermann et al.

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