Patent · US Expired

Dispersion apparatus and process for producing a large cloud of an electrostatically charged powder/air mixture

US6053420A · kind A · utility

6Cited by

18References

16Claims

0Family size

Assignee

ABB RESEARCH LTD. · CH

Inventors

Enar Ahlbert · Växjö, SE
Lars-Erik Johansson · Ottawa, CA
Gunter Borner · Radevormwald, DE
Johann Nienburg · Heidelberg, DE
Anton Puhane · Heidelberg, DE

Key dates

Filing date	Mar 8, 1999
Grant date	Apr 25, 2000
Priority date	—
Expiry date	Mar 8, 2019

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB05B7/10
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process and a dispersion apparatus for shaping a powder cloud emerging from a powder spraying apparatus achieve large powder clouds and good electrostatic charging by directing control air in a tangential direction towards a powder/air stream flowing through the dispersion apparatus in an axial spraying direction. A helically accelerated movement of the powder/air stream in the direction of an outlet is achieved thereby.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.