Electric charge holding structure for electretized air-filter me

Details Electric charge holding structure for electretized air-filter me Electric charge holding structure for electretized air-filter me

1978-03-28

1980-01-29

Nozick, Bernard

Gas separation

Means within gas stream for conducting concentrate to collector

55100, 55103, 55131, 55DIG39, 55528, 307400, B03C 302

Patent

active

041859723

ABSTRACT:
The present invention is an improvement in electretized filtering means. This is an electric charge holding structure wherein the filter medium is covered on two opposite sides with an electrically conductive material having an air permeability that does not impair the air permeability of the filter and these two opposite sides are shorted together. This concept is similar to causing a short in the magnetic lines of force for the purpose of long time retention of the magnetic force as often employed in the vicinity of a permanent magnet. In this invention this idea is applied to electret as an air-filter medium.

REFERENCES:
patent: 2795290 (1957-06-01), Butsch et al.
patent: 3118022 (1964-01-01), Sessler et al.
patent: 3449093 (1969-06-01), Baxt et al.
patent: 4035164 (1977-07-01), Taylor
Electrets-Andrew Germant-Physics Today, vol. 2, No. 3, pp. 8-13, 3-49.
Electrets-Dickinson--Plastics Research Co., Alhambra, California, pp. 1-31, 6/7/49.

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