Method and apparatus for simultaneously electrocoating the interior and exterior of a metal container
US4400251A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1981 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Jun 5, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D13/14
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method and apparatus are provided for electrocoating the interior and exterior of a metal container using a dual flow system. The interior and exterior surfaces of the metal container may be coated with the same or different coating weights. An electrically conductive probe, including a nozzle, is inserted into a metal container and an electrically conductive housing is enclosed around the container to seal the container therein. Two separate passageways are provided such that one passageway supplies coating material about the container between the container exterior and the outer housing and a second passageway is formed by the hollow probe and the interior of the container. Electrocoating material is caused to flow into each of the passageways. As flowing electrocoating material floods the container interior and exterior in separate transient baths, an electrical potential is impressed between the container and the probe-nozzle to electrocoat the interior of the container, and between the container and the outer housing to electrocoat the exterior of the container. The interior and exterior of the container can be coated simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.