Apparatus for and method of making an electret tape

Details Apparatus for and method of making an electret tape Apparatus for and method of making an electret tape

1983-09-02

1985-01-22

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Electric charging of objects or materials

307400, B05C 104

Patent

active

044955413

ABSTRACT:
Apparatus for continuously making an electret tape having an electrically conductive strip with dielectric layers on opposite sides thereof in which the tape is moved vertically in the direction of its length. A pair of opposed electrodes connected to a high voltage source and continuously wetted with a dielectric fluid contact the respective dielectric layers to electrostatically charge each layer. A second pair of identical electrodes connected to the high voltage source and the dielectric fluid supply is spaced above the other electrode pair and repeats electrostatic charging of the dielectric layers to insure uniformity of charge thereon. Fluid on the layers is dried by air blown against them as the tape emerges from the second electrode pair.

REFERENCES:
patent: 3323965 (1967-06-01), Hanle et al.
patent: 3429701 (1969-02-01), Koehler
patent: 4213168 (1980-07-01), Garbett
patent: 4344810 (1982-08-01), Becker et al.
patent: 4382196 (1983-05-01), Miller et al.

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