Electrostatic coating with post charger web or coil coating and

Details Electrostatic coating with post charger web or coil coating and Electrostatic coating with post charger web or coil coating and

1977-04-21

1978-05-02

Kaplan, Morris

Coating apparatus

With means to apply electrical and/or radiant energy to work...

Electrostatic and/or electromagnetic attraction or...

118638, 118654, 427 21, 427 22, 427 39, B05C 500, B05D 306, B05D 314

Patent

active

040868729

ABSTRACT:
A system and process for electrodynamic powder coating of conducting and non-conducting substrates using an electrodynamic fluidized bed. The system generally includes a coating applicator means for applying charged particles to the substrate to be coated, and postcharging means for applying to the substrate an additional charge of such polarity as to cause an increase in the electrostatic forces holding the coating particles to the substrate. The system further includes a precharging means for precharging the substrate with a charge of such polarity as to effect more uniform coating of the substrate and a higher rate of coating. Where the substrate to be coated is a continuous web, the system includes a conveying means for conveying the web through the various positions adjacent to the three aforementioned means. The coating applicator means may be an electrodynamic coating apparatus of the electrodynamic fluidized bed type and comprising a fluidized bed means and a charging bed means with a porous wall positioned therebetween, and a recharging means.

REFERENCES:
patent: 2221338 (1940-11-01), Wintermute
patent: 2550657 (1951-04-01), Ransburg
patent: 3248253 (1966-04-01), Barford et al.
patent: 4033292 (1977-07-01), Klingenberg

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