Method and apparatus for conveying electrically conductive paints between different voltage potentials
US6589348B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2001 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Apr 26, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B12/149
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An electrostatic paint atomizer connected to a discharge station at high voltage is supplied, via an isolating conveying line, with individual divided-off quantities of paint enclosed between two pigs from a loading station at the other end of the conveying line. The paint is conveyed by a transport device supplying a thrust medium (compressed air or insulating liquid) to discharge the paint in the discharge station. A reverse transport device operating with compressed air transports the pigs back to the loading station. The length (L) of the conveying line between the loading and the discharge stations and the length (l) of a divided-off quantity of paint, are dimensioned to provide a sufficiently long isolating path (L-l) to avoid a voltage flashover. A continuous supply of paint is achieved with two parallel conveying lines, through which quantities of paint are metered with an offset from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.