Method for electrostatic coating of a paper web

Details Method for electrostatic coating of a paper web Method for electrostatic coating of a paper web

2007-03-06

2007-03-06

Parker, Fred J. (Department: 1762)

Coating processes

Direct application of electrical, magnetic, wave, or...

Electrostatic charge, field, or force utilized

C427S475000, C427S477000

Reexamination Certificate

active

10507417

ABSTRACT:
A method for preliminary treatment of particles of a powder in a dry surface treatment process before applying the powder particles on a surface of a substrate by utilizing an electric field created by electrodes. The Electrodes are located at opposite sides of the substrate in such a way that at least one first electrode is located at the side of the substrate to be coated, and at least one second electrode is located at the opposites side of the substrate. The particles of the powder are pre-charged before bringing them into the electric field.

REFERENCES:
patent: 3521558 (1970-07-01), Patterson et al.
patent: 3930614 (1976-01-01), Krenkel
patent: 5344082 (1994-09-01), Haller et al.
patent: 26 46 798 (1978-04-01), None
patent: 0 782 934 (1997-07-01), None
patent: WO 97/36049 (1997-10-01), None
patent: WO 03/076715 (2003-09-01), None
International Search Report issued in PCT/FI03/00180 as Pub. No. WO 03/076715 A3.
International Preliminary Examination Report issued in PCT/FI03/00180.

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