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AssigneeRansburg Corporation
InventorsHarold T. Allen, Edward T. Feldman, Varce E. Howe, Ghaffar Kazkaz, Ghazi M. A. Khattab, Jerry L. McPherson, Jr., James A. Scharfenberger
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A coating system comprises a source of electrically non-insulative coating material, a dispenser for dispensing the coating material toward an article to be coated thereby, an electrostatic high potential for supplying charge to the coating material, means for coupling the high potential supply across the dispenser and the article, a first reservoir, and a first valve. The first valve has a first housing providing first, second, third, fourth and fifth ports, and a first component movable within the first housing and having a first passageway selectively to connect the first port to second port to permit the flow of coating material from the first port to the second port. The first port is coupled to the coating material source, the second port to the first reservoir, and the third port to the dispenser. The second port is coupled to the third port to permit the flow of coating material from the first reservoir to the dispenser. A source is provided for an electrically non-conductive fluid. The first housing and the first movable component define between them a second passageway, and the source of electrically non-conductive fluid is coupled to the fourth port to provide a flow of the electrically non-conductive fluid from the source of electrically non-conductive fluid through the second passageway to flush coating material from surfaces of the first housing and first movable component adjacent the second passageway and exit from the fifth port.
A coating system comprising a source of electrically non-insulative coating material, a dispenser for dispensing the coating material toward an article to be coated thereby, an electrostatic high potential supply for supplying charge to the coating material, means for coupling the high potential supply across the dispenser and the article, a first reservoir, a first valve having a first housing, the first housing providing first, second, third, fourth and fifth ports, and a first component movable within the first housing and having a first passageway to selectively connect the first port to the second port to permit the flow of coating material between the first port and the second port, means for coupling the first port to the coating material source, means for coupling the second port to the first reservoir, means for coupling the third port to the dispenser, the first component being movable within the housing to selectively connect the second port to the third port to permit the flow of coating material between the first reservoir and the dispenser, a source of an electrically non-conductive fluid, the first housing and the first movable component defining between them a second passageway, and means for coupling the source of electrically non-conductive fluid to the fourth port to provide a flow of the electrically non-conductive fluid from the source of electrically non-conductive fluid through the second passageway to flush coating material from surfaces of the first housing and first movable component adjacent the second passageway, at least a portion of the electrically non-conductive fluid flowing through the fourth port also flowing through the fifth port.
A coating system comprising a source of electrically non-insulative coating material, a dispenser for dispensing the coating material toward an article to be coated thereby, an electrostatic high potential supply for supplying charge to the coating material, means for coupling the high potential supply across the dispenser and the article, a first reservoir, a first valve having a first housing, the first housing providing first, second, third and fourth ports, and a first component movable within the first housing and having a first passageway to selectively connect the first port to the second port to permit the flow of coating material between the first port and the second port, means for coupling the first port to the coating material source, means for coupling the second port to the first reservoir, means for coupling the third port to the dispenser, the first component being movable within the housing to selectively connect the second port to the third port to permit the flow of coating material between the first reservoir and the dispenser, a source of an electrically non-conductive fluid, the first housing and the first movable component defining between them a second passageway, and means for coupling the source of electrically non-conductive fluid to the fourth port to provide a flow of the electrically non-conductive fluid from the source of electrically non-conductive fluid through the second passageway to flush coating material from surfaces of the first housing and first movable component adjacent the second passageway, the first reservoir comprising a first piston and cylinder, the first piston reciprocable in the first cylinder, the first reservoir defined between a surface of the first piston and a first head of the first cylinder.
A coating system comprising a source of electrically non-insulative coating material, a dispenser for dispensing the coating material toward an article to be coated thereby, an electrostatic high potential supply for supplying charge to the coating material, means for coupling the high potential supply across the dispenser and the article, a first reservoir, a first valve having a first housing, the first housing providing first, second, third and fourth ports, and a first component movable within the first housing and having a first passageway to selectively connect the first port to the second port to permit the flow of coating material between the first port and the second port, means for coupling the first port to the coating material source, means for coupling the second port to the first reservoir, means for coupling the third port to the dispenser, the first component being movable within the housing to selectively connect the second port to the third port to permit the flow of coating material between the first reservoir and the dispenser, a source of an electrically non-conductive fluid, the first housing and the first movable component defining between them a second passageway, and means for coupling the source of electrically non-conductive fluid to the fourth port to provide a flow of the electrically non-conductive fluid from the source of electrically non-conductive fluid through the second passageway to flush coating material from surfaces of the first housing and first movable component adjacent the second passageway, a second reservoir, a second valve having a second housing provided with fifth, sixth, seventh and eighth ports, means for coupling the fifth port to the second reservoir, means for coupling the sixth port to the dispenser, means for coupling the seventh port to a source of coating material, a second component movable within the second housing and having a third passageway to selectively connect the fifth port to the sixth port to permit the flow of coating material from the second reservoir through the fifth port, the third passageway, and the sixth port to the dispenser, the second component being movable within the second housing to selectively connect the fifth port to the seventh port to permit the flow of coating material from the seventh port to the fifth port, the second housing and the second movable component defining between them a fourth passageway, and means for coupling the source of electrically non-conductive fluid to the eighth port to provide a flow of the electrically non-conductive fluid from the source of electrically non-conductive fluid through the eighth port and fourth passageway to flush coating material from surfaces of the second housing and second movable component adjacent the fourth passageway.
A coating system comprising a source of electrically non-insulative coating material, a dispenser for dispensing the coating material toward an article to be coated thereby, an electrostatic high potential supply for supplying charge to the coating material, means for coupling the high potential supply across the dispenser and the article, a first reservoir, a first valve having a first housing, the first housing providing first, second, third and fourth ports, and a first component movable within the first housing and having a first passageway to selectively connect the first port to the second port to permit the flow of coating material between the first port and the second port, means for coupling the first port to the coating material source, means for coupling the second port to the first reservoir, means for coupling the third port to the dispenser, the first component being movable within the housing to selectively connect the second port to the third port to permit the flow of coating material between the first reservoir and the dispenser, a source of an electrically non-conductive fluid, the first housing and the first movable component defining between them a second passageway, and means for coupling the source of electrically non-conductive fluid to the fourth port to provide a flow of the electrically non-conductive fluid from the source of electrically non-conductive fluid through the second passageway to flush coating material from surfaces of the first housing and first movable component adjacent the second passageway, the fourth port comprising means providing a gallery in the first housing, the gallery provided with a slot shaped opening facing the first movable component.
Dependencies are inferred from the claim text.