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

1997-12-10

1999-11-02

Tentoni, Leo B.

Plastic article or earthenware shaping or treating: apparatus

Means applying electrical or wave energy directly to work

Electro-static or inductive field

264216, 264467, 425377, B29C 3942, B29D 701

Patent

active

059758732

ABSTRACT:
A device for laying a film 3 emerging from a slot die 2 onto a take-off roll 1 has at least one electrode that is arranged parallel to and at a short distance from the surface of the take-off roll 1 and to which electric voltage in the range from 4 to 12 kV is applied. This electrode is, for example, a metal strip 4, which has a tapering strip edge 6 this is directed toward the surface of the take-off roll 1. In addition to this metal strip 4, one or a plurality of electrodes 5, 8 and 16 are arranged at a distance from the surface of the take-off roll. These additional electrodes have applied to them an electric voltage whose magnitude is the same as or different from that applied to the metal strip 4. As a result, additive electric fields to the electric field of the one metal-strip electrode are formed.

REFERENCES:
patent: Re27771 (1973-10-01), Owens et al.
patent: 3655307 (1972-04-01), Hawkins
patent: 3820929 (1974-06-01), Busby et al.
patent: 5494619 (1996-02-01), Zaretsky et al.
Patent Abstract of Japan Publication No. 09141728, (Jun. 3, 1997).
Patent Abstract of Japan Publication No. 02164517 (Jun. 25, 1990).
Patent Abstract of Japan Publication No. 63317316 (Dec. 26, 1988).

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