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

1996-12-11

1999-05-04

Mayekar, Kishor

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

With means applying electromagnetic wave energy or...

226 94, B65H 2000

Patent

active

059002182

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: 4402035 (1983-08-01), Kisler
patent: 4501954 (1985-02-01), Sturdevant
patent: 4852820 (1989-08-01), Looser
patent: 5605607 (1997-02-01), LaRose et al.
"Electrostatically Assisted Core Starts on Automatic Winders"; Tappi Journal; vol. 76, No. 11; pp. 231-237; Nov. 1993.

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