Apparatus for and method of making an electret tape
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United States of America Patent
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-
Jan 22, 1985
Grant Date -
N/A
app pub date -
Sep 2, 1983
filing date -
Sep 2, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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