Powder coating distributor
AssigneeG & R Electro-Powder Coating Corporation
InventorsMark E. Hubbell, Alan R. Riebe
Life of this patent
Estimating the term…
Abstract
In a distributor for coating powders for electrostatic coating apparatus, an insulator shield member is provided on top of the powder distributor disk, preventing accumulation of charged powder thereon which might otherwise result in uneven distribution of powder from the distributor.
Claims11
An apparatus for dispensing a coating material in dry form and including a generally planar distributor disk of electrical insulating material with front and rear surfaces, the front surface having an outer perimetrical edge and at least one aperture spaced inwardly from said edge and communicating with a source of said coating material, and means for directing a flow of said coating material from said aperture outward along said front surface to said edge, and electrically conductive means on the rear surface of said disk extending to said edge and electrically charged to charge said coating material as said coating material from said flow crosses and is dispensed outward from said edge, and including the improvement comprising:
- an insulator shield disposed on said rear surface and covering a substantial portion of said electrically conductive means and extending to a location adjacent the said perimetrical edge and leaving exposed a portion of said electrically conductive material adjacent said edge said shield having an electrical insulating characteristic sufficient to inhibit charging of coating material on said shield and said shield inhibiting accumulation of coating material on the said exposed portion of said electrically conductive means.
A method of inhibiting uneven distribution of electrostatic coating material from a powder coating material distributor having a generally planar distributor disk of electrical insulating material with front and rear surfaces, the front surface having an outer perimetrical edge and at least one aperture spaced inwardly from said edge and communicating with a source of said coating material, and means for directing a flow of said coating material from said aperture outward along said front surface to said edge and electrically conductive means on the rear surface of said disk extending to said edge and electrically charged to charge said coating material as said coating material from said flow crosses and is dispensed outward from said edge, said method comprising the step of:
- covering with insulator shield means a substantial portion of said electrically conductive means, leaving exposed a portion of said electrically conductive means adjacent said edge, said shield means being provided with an electrical insulating characteristic sufficient to inhibit charging of coating material on said shield means, said shield means inhibiting accumulation of coating material on said exposed portion of said electrically conductive means.
Dependencies are inferred from the claim text.