Powder preparation system for coating powder
US5000624A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 1, 1988 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Sep 1, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B7/1454
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Fluidized powder in a powder preparation container is treated to impart to it a desired moisture content through the feeding into the fluidized powder of a stream of compressed air whose moisture content and temperature have been carefully regulated. Powder in the preparation container which has attained the desired moisture content is then transferred to a powder holding container and from there to a spraying device by which spraying device the powder is electrostatically charged and sprayed on articles. Further, the powder preparation container is heated along several distinct heating zones which are arranged one above the other along the axis, i.e. height, of the container. The powder in the powder preparation container is stratified with the powder at the bottom of the container being affected only negligibly by the continuous introduction of fresh powder through the top of the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.