Continuous powder feed system for maintaining a uniform powder coating thickness on objects being coated by electrostatic fluidized beds
US4066040A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1976 |
| Grant date | Jan 3, 1978 |
| Priority date | — |
| Expiry date | May 6, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C19/025
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A continuous powder feed system for maintaining an essentially uniform powder cloud above an electrostatic fluidized bed coating unit is disclosed. The continuous powder feed system comprises a powder container and discharger for continuously feeding essentially non agglomerated powder into the coating bed of the electrostatic fluidized bed coating unit, powder retaining walls for containing the bed of such coating unit during fluidization, at least one powder retaining wall having a height such as to determine the powder level in the coating bed and permit overflow of excess powder from the coating bed, and a powder collection system for retrieving the overflowing powder from the coating bed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.