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US3918641A
Expired / Lapsed
US
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Electrostatic powder coating installation
Assignee: Gema Switzerland GmbH
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Filing: 1974-12-20
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Granted: 1975-11-11
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Expires: 1994-12-20
Abstract
Abstract An electrostatic powder coating installation incorporating a cabin in which there are arranged means connected with a supply container for the delivery of electrostatically charged powder. A part of the internal compartment of the cabin is limited by one side or face of a filter moving through the cabin, the other face of which confronts the suction side of a suction device effective through the filter at the aforementioned internal compartment. A cleaning device is operatively associated with the filter in order to remove therefrom excess powder deposited thereon. The cleaning device embodies a suction nozzle directed towards the one face of the filter and which while interposing a separator is operatively connected with the suction side of a suction blower. The outlet of the separator is connected with a supply container. The method of operating the installation entails depositing fresh powder upon a section of the filter located in front of the suction nozzle for the purpose of replacing the powder consumed during the coating operation.
Inventors
- 👤 Ernst Lehmann
- 👤 Robert Prinzing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:39
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/14; B05B7/1404; B05B7/144; B05B14/00; B05B14/20; B05B14/40; B05B14/43; B05B14/45; B05B5/00; B05B5/08; B05B5/087; B05B5/16; B05B5/1683; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
170 words
An electrostatic powder coating installation comprising a cabin, a supply container, means operatively coupled with the supply container for delivering electrostatically charged powder into the interior of the cabin, said cabin being provided with an internal compartment, a filter movable in a predetermined direction of travel through the cabin, said filter having opposed faces, one face of said filter bounding a part of the internal compartment of the cabin, a suction device having a suction side and effective through the filter at said internal compartment, the other face of said filter confronting the suction side of the suction device, a cleaning device operatively associated with the filter for removing excess powder which has deposited on the filter, said cleaning device possessing a suction nozzle directed towards the one face of the filter, a suction blower having a suction side, a separator, the suction nozzle being connected by means of the separator with the suction side of the suction blower, said separator having an outlet flow communicating with the supply container.
Claim 2
Dependent Claim
170 words
An electrostatic powder coating installation comprising a cabin, a supply container, means operatively coupled with the supply container for delivering electrostatically charged powder into the interior of the cabin, said cabin being provided with an internal compartment, a filter movable in a predetermined direction of travel through the cabin, said filter having opposed faces, one face of said filter bounding a part of the internal compartment of the cabin, a suction device having a suction side and effective through the filter at said internal compartment, the other face of said filter confronting the suction side of the suction device, a cleaning device operatively associated with the filter for removing excess powder which has deposited on the filter, said cleaning device possessing a suction nozzle directed towards the one face of the filter, a suction blower having a suction side, a separator, the suction nozzle being connected by means of the separator with the suction side of the suction blower, said separator having an outlet flow communicating with the supply container.
Claim 3
Dependent Claim
57 words
The installation as defined in claim 1, wherein said filter comprises a filter band which moves along said predetermined direction of travel and extends out of said cabin in the direction of travel of said filter band, said suction nozzle being arranged at the region of a section of the filter band located externally of the cabin.
Claim 4
Dependent Claim
55 words
The installation as defined in claim 1, further including a delivery mechanism having an outlet for fresh powder, said outlet of the delivery mechanism being directed towards the one face of the filter, and wherein the delivery mechanism is arranged ahead of the suction nozzle with respect to the direction of travel of the filter.
Claim 5
Dependent Claim
29 words
The installation as defined in claim 2, further including means acting upon the filter for the removal of electrostatic charges and arranged between the cabin and the suction nozzle.
Claim 6
Dependent Claim
20 words
The installation as defined in claim 4, wherein said means for the removal of electrostatic charges comprises a corona electrode.
Claim 7
Dependent Claim
72 words
The installation as defined in claim 4, further including a delivery mechanism having an outlet for fresh powder, said outlet being directed towards the one face of the filter, said delivery mechanism being arranged ahead of the suction nozzle with respect to the direction of travel of the filter, and wherein the means for the removal of the electrostatic charges is arranged between the cabin and the outlet of the delivery mechanism.
Claim 8
Dependent Claim
30 words
The installation as defined in claim 1, further including means for generating current surges in the suction nozzle, said generating means being arranged between the suction nozzle and the separator.
Claim 9
Dependent Claim
39 words
The installation as defined in claim 7, further including a connection conduit disposed between the suction nozzle and the separator, said connection conduit having a throughpassage and being provided with an oscillating floating body for periodically throttling said throughpassage.
Claim 10
Dependent Claim
39 words
The installation as defined in claim 7, further including a connection conduit arranged between the suction nozzle and the separator, means defining a false air opening provided in the connection conduit and controlled by a to-and-fro movable closure element.
Claim 11
Dependent Claim
53 words
The installation as defined in claim 1, wherein a sieve mechanism is arranged between the outlet of the separator and the supply container, said sieve mechanism due to its sieving action improving the friability of the powder arriving out of said outlet of the separator prior to its entry into the supply container.
Claim 12
Dependent Claim
19 words
The installation as defined in claim 10, wherein a sluice impeller is positioned to cooperate with said sieve mechanism.
Claim 13
Dependent Claim
21 words
The installation as defined in claIm 11, wherein said sluice impeller is selectively arranged upstream or downstream of the sieve mechanism.
Claim 14
Dependent Claim
16 words
The installation as defined in claim 3, wherein the delivery mechanism possesses a regulatable dosing mechanism.
Claim 15
Dependent Claim
29 words
The installation as defined in claim 1, wherein said suction blower has a pressure side, and means for connecting the pressure side with the internal compartment of the cabin.
Claim 16
Dependent Claim
53 words
The installation as defined in claim 14, further including a distributor conduit having a number of outlet openings arranged in the internal compartment of the cabin at the region of the exit of the filter band out of the cabin, the pressure side of said suction blower being connected with said distributor conduit.
Claim 17
Dependent Claim
26 words
The installation as defined in claim 14, wherein the conveying capacity of the suction device is a multiple of the conveying capacity of the suction blower.
References Cited (Backward Citations)
US3691991A
Cited
US3724755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |