US4360155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder coating distributor
Assignee: GLOVER EAN K
•
Filing: 1981-08-10
•
Granted: 1982-11-23
•
Expires: 2001-08-10
Abstract
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.
Inventors
- 👤 Mark E. Hubbell
- 👤 Alan R. Riebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:45
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/025; B05B5/03; B05B5/032
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
193 words
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.
Claim 2
Independent Claim
193 words
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.
Claim 3
Dependent Claim
84 words
The improvement of claim 1 wherein: said shield includes a shield plate with a substantially flat front face mounted to said rear surface of said distributor disk and having an outer edge; and said conductive means extends radially outward slightly beyond the outer edge of said shield plate and is exposed to said coating material beyond said outer edge of said shield plate at the said outer perimetrical edge of said distributor disk in the plane of said front face of said shield plate.
Claim 4
Dependent Claim
39 words
The improvement of claim 1 wherein: said distributor disk extends generally horizontally; and said shield includes a shield plate made of an electrically insulating material mounted atop said electrically conductive means on said rear surface of said distributor disk.
Claim 5
Dependent Claim
25 words
The apparatus of claim 3 wherein: said shield plate is rested on the top surface of said distributor disk without attachement to said top surface.
Claim 6
Dependent Claim
29 words
The improvement of claim 3 wherein the said electrical insulating characteristic of said shield plate is such that the effective potential at the top of said plate is zero.
Claim 7
Dependent Claim
31 words
The improvement of claim 3 wherein said distributor disk is substantially circular about a generally vertical axis, said perimetrical edge being circular, and said shield plate is circular about said axis.
Claim 8
Dependent Claim
49 words
The improvement of claim 6 wherein said apparatus has a cover housing of electrically insulating material, a portion of said housing which covers said distributor disk having an outer circular wall at the top of said distributor disk; said shield plate having a circular inner edge adjacent said wall.
Claim 9
Dependent Claim
87 words
The improvement of claim 7 wherein the top of said distributor disk is flat and horizontal from its outer circular edge to said housing wall and: said shield plate has a bottom surface which snugly engages said flat top around the circumference of said plate at the outer circular edge of said plate to exclude said coating material from said electrically conductive means at the top of said distributor disk, said electrically conductive means extending radially outward slightly beyond the outer circular edge of said shield plate.
Claim 10
Dependent Claim
66 words
The improvement of claim 7 wherein the outer marginal portion of the top of said distributor disk slopes upward from the outer circular edge thereof to a horizontal circular top portion radially inward from said outer circular edge and; said shield plate overhangs and covers substantially all of the said sloping marginal portion and rests on and covers a substantial part of said circular top portion.
Claim 11
Independent Claim
186 words
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.
Claim 12
Independent Claim
186 words
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.
Claim 13
Dependent Claim
23 words
The method of claim 10 wherein the covering step comprises: resting a shield disk on the distributor, without attaching it to the distributor.
References Cited (Backward Citations)
US3128045A
Cited
US3843054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-22 | 1986-05-24 | 1986-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-22 | 1990-05-24 | 1990-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-22 | 1994-05-24 | 1994-11-23 | $7700.00 | Window Closed / Lapsed |