Powder spray system
US4704953A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1986 |
| Grant date | Nov 10, 1987 |
| Priority date | — |
| Expiry date | Nov 12, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/46
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A powder spray system including a powder spray booth through which product is conveyed past a spray gun mounted adjacent the booth to spray charged particles into the booth. A chamber containing a fan and final filters is located beneath the booth. A movable powder collector having a plurality of filter cartridges and a powder collection hopper is movable beneath the booth into sealed engagement with the hopper and with the chamber containing the fan and final filters. Mounted upon the powder collector there is a feed hopper into which a transfer pump is operable to pump powder from the collection hopper. A movable sieve is mounted upon the inlet end of a hose which supplies powder from a fluidizing bed at the bottom of the powder collection hopper into the transfer pump. An overflow outlet opening interconnects the feed hopper and the powder collection hopper, and the pump flows are adjusted so that powder is maintained in the feed hopper at the level of the overflow outlet opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.