Electrostatic spray coating apparatus
US4009829A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 1975 |
| Grant date | Mar 1, 1977 |
| Priority date | — |
| Expiry date | Feb 11, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B5/043
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved electrostatic spray charging device for spray guns is disclosed. The device comprises an adapter formed from a dielectric material in the shape of a generally cylindrical tube adapted at one end to be secured to the end of a conventional spray gun and constructed at the second end to provide an inductive charging field for materials discharged by the spray gun. The second end of the adapter is formed, in the preferred embodiment, into two diametrically opposed lobes, each of which carries on its interior surface at least one charging plate to which a d.c. voltage on the order of 10-20 KV is applied. The exterior surface of each lobe carries an electrically grounded electrode which preferably is annular in shape to provide an electric field configuration that prevents accumulation of charged spray particles on the exterior surfaces of the adapter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.