Hand-held coating-dispensing apparatus
US4331298A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1979 |
| Grant date | May 25, 1982 |
| Priority date | — |
| Expiry date | Apr 9, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B5/0531
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An electrostatic, coating-dispensing apparatus includes an electrode upon which an electrostatic potential is impressed. The electrostatic potential is developed by a switching circuit, autotransformer and voltage multiplier from rectified line voltage. The entire apparatus is housed in a hand-held applicator to which line voltage is supplied. In one embodiment, suitable for the hobbyist, the apparatus includes a socket defined at one end thereof for interchangeably receiving containers holding various colors or types of coating material. Each container includes an electrode for contacting the first-mentioned electrode. The containers are shaped to fit snugly into the socket to hold the two electrodes in contact. An outer end wall of each container has a mesh portion through which charged particles of coating material from the interior of the container pass when the apparatus is activated. In another embodiment suitable for industrial applications, the coating material and any other necessary supplies, such as compressed air, are provided through hoses to the dispensing apparatus. The electrostatic potential supply is sufficiently compact that it can be housed within the hand-held …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.