Method and apparatus for establishing a uniform charge on a subs

Details Method and apparatus for establishing a uniform charge on a subs Method and apparatus for establishing a uniform charge on a subs

1987-12-28

1989-03-07

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 24, 361213, 361221, 361225, 4251748E, H05F 300

Patent

active

048104329

ABSTRACT:
A method and apparatus for establishing a uniform electrostatic charge of selected magnitude and polarity on a randomly charged web. The method and apparatus include first and second uniform electrostatic fields of predetermined magnitudes and of opposite polarities spaced from one another. Apparatus is provided for mechanically vibrating each electrostatic field at a particular magnitude and frequency while alternately passing the randomly charged web through each such electrostatic field at a particular angle with respect to the direction of field vibration to thereby establish a uniform magnitude and polarity electrostatic charge on the randomly charged web.

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