Claims
- 1. Apparatus for supplying and dispensing electrically conductive coating material, comprising:
- a coating dispenser having an actuator which is movable to an operating position to initiate discharge of coating material therefrom and to a non-operating position to terminate the discharge of coating material, said coating dispenser employing pressurized air in the operation thereof;
- a container which is effective to receive coating material from a source, and then to transmit the coating material to said coating dispenser;
- a voltage block including a coupling element and a pneumatic actuator, said coupling element being movable to a fill position by said pneumatic actuator, in said fill position coating material is transmitted from the source of coating material through said coupling element to said container, and said coupling element being movable to an isolated position by said pneumatic actuator, in said isolated position said container is electrically isolated from the source of coating material;
- an electrostatic power supply operative to apply an electrostatic charge to the coating material which is discharged from said coating dispenser; and
- a control device, connected to a source of pressurized air, which is operative in response to movement of said coating dispenser actuator to said non-operating position to transmit pressurized air to said pneumatic actuator of said voltage block to cause said pneumatic actuator to move said coupling element to said fill position.
- 2. The apparatus of claim 1 in which said control device is a control valve.
- 3. The apparatus of claim 1 in which said control device is effective to delay the transmission of pressurized air to said pneumatic actuator of said voltage block for a selected time period after said coating dispenser actuator moves to said non-operating position.
- 4. Apparatus for supplying electrically conductive coating material to a coating dispenser having an actuator movable to an operating position to initiate discharge of coating material therefrom and to a non-operating position to terminate the discharge of coating material, said coating dispenser employing pressurized air in the operation thereof, said apparatus comprising:
- a container, which is effective to receive coating material from a source, and then to transmit the coating material to said coating dispenser;
- a voltage block including a coupling element and a pneumatic actuator, said coupling element being movable to a fill position by said pneumatic actuator, in said fill position coating material is transmitted from the source of coating material to said container, and said coupling element being movable to an isolated position by said pneumatic actuator, in said isolated position said container is electrically isolated from the source of coating material;
- an electrostatic power supply operative to apply an electrostatic charge to the coating material which is discharged from said coating dispenser; and
- a control device, connected to a source of pressurized air, which is operative in response to movement of said coating dispenser actuator to said non-operating position to transmit pressurized air to said pneumatic actuator of said voltage block to cause said pneumatic actuator to move said coupling element to said fill position.
- 5. The apparatus of claim 4 in which said control device is a control valve.
- 6. The apparatus of claim 4 in which said control device is effective to delay the transmission of pressurized air to said pneumatic actuator of said voltage block for a selected time period after said coating dispenser actuator moves to said non-operating position.
Parent Case Info
This is a continuation Ser. No. 08/549,475 filed on Oct. 27, 1995, (now abandoned) which is a continuation of Ser. No. 08/254,845 filed Jun. 6, 1994 (now U.S. Pat. NO. 5,538,186) which is a continuation of Ser. No. 08/076,302, filed Jun. 11, 1993 (now U.S. Pat. No. 5,341,990).
US Referenced Citations (74)
Foreign Referenced Citations (2)
Number |
Date |
Country |
5154638 |
Nov 1974 |
JPX |
8705832 |
Jun 1987 |
WOX |
Continuations (3)
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Number |
Date |
Country |
Parent |
549475 |
Oct 1995 |
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Parent |
254843 |
Jun 1994 |
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Parent |
76302 |
Jun 1993 |
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