Apparatus for electrostatically spray-coating workpiece with paint
US5288029A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1991 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Oct 30, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B12/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus for electrostatically spray-coating a workpiece with conductive paint which includes a color changeover valve mechanism for selectively supplying conductive paint, cleaning liquid and air. A flush valve mechanism is provided for selectively supplying the cleaning liquid and the air. A first directional control valve includes an outlet and inlets. The inlets are connected to feed lines extending from the color changeover valve mechanism and the flush valve mechanism, respectively. A block line is made of an insulating material and has a first end connected to the outlet of the first directional control valve. The block line includes a second end in communication with the first end. A second directional control valve is provided having outlets and an inlet. The inlet is connected to the second end of the block line. An intermediate reservoir is connected via a feed line to one of outlets of the second directional control valve. A waste-liquid tank is connected via a first discharge line to a second outlet of the second directional control valve. A spray gun is connected via a delivery line to the intermediate reservoir. A second discharge line is branched from the delive…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.