Web feeder with controlled electrostatic force and method

Details Web feeder with controlled electrostatic force and method Web feeder with controlled electrostatic force and method

1995-03-15

1997-02-25

Phasge, Arun S.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

226 94, H05F 300

Patent

active

056056079

ABSTRACT:
A method and apparatus for applying a uniform electrostatic force to a web moving between a pair of electrodes to create an electron wind that urges the web toward one of the electrodes controls the current forming the electron wind to maintain the current and the wind force substantially constant even though impedance may vary. The method may be used to provide a hard nip, to adjust tension, to spread and/or to smooth a coating, to remove curl, and to cure a coating.

REFERENCES:
patent: Re26951 (1970-09-01), Vaccaro
patent: 4129469 (1978-12-01), Deverell et al.
patent: 4852820 (1989-08-01), Looser
Wettermann A., "Electrostatically assisted core starts on automatic winders"; Tappi Journal; vol. 76, No. 11; pp. 231-237, Nov. 1993.

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