Coating processes – Direct application of electrical – magnetic – wave – or... – Electrostatic charge – field – or force utilized
Patent
1997-02-20
1998-09-01
Beck, Shrive
Coating processes
Direct application of electrical, magnetic, wave, or...
Electrostatic charge, field, or force utilized
427475, 427185, 118308, 118309, 118DIG5, B05D 106, B05B 724, B05L 1904
Patent
active
058008764
ABSTRACT:
A method and a device for controlling the outflow of fluid powder from a container can be used for controlling the expulsion of powder out of a powder-spraying apparatus for electrostatic coating. The disadvantages of a mechanical closing device are avoided by introducing closing air into an extraction pipe for extracting fluidized powder out of a container. The closing air is introduced through a pipe which opens into an orifice in the casing of the extraction pipe. The mass flow of fluidized powder can be controlled by an appropriate setting of a pressure in the extraction pipe in relation to the pressure in the fluid bed, that is to say by the introduction of closing air at an appropriate pressure.
REFERENCES:
patent: 4500560 (1985-02-01), Guffroy
patent: 4764056 (1988-08-01), Zentgraf et al.
patent: 5558713 (1996-09-01), Siegfried et al.
Borner Gunter
Nienburg Johann
Sopka Jorg
Wittmann Josef
ABB Research Ltd
Beck Shrive
Greenberg Laurence A.
Lerner Herbert L.
Parker Fred J.
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