Patent · US Expired

Powder-spraying apparatus with internal and external charging

US6220533A · kind A · utility

2Cited by

3References

7Claims

0Family size

Assignee

ABB RESEARCH LTD. · CH

Inventors

Gunter Borner · Radevormwald, DE
Johann Nienburg · Heidelberg, DE
Jorg Sopka · Schwetzingen, DE
Josef Wittmann · Hockenheim, DE

Key dates

Filing date	Aug 9, 1999
Grant date	Apr 24, 2001
Priority date	—
Expiry date	Aug 9, 2019

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB05B5/0533
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A powder-spraying apparatus having simultaneous internal and external charging, which is suitable for electrostatic powder coating. In order to achieve improved constancy of the deposition efficiency, largely independent of the distance between the powder-spraying apparatus and the work piece, it is proposed to connect both internal high-voltage electrodes and external high-voltage electrodes to a high-voltage source via high-resistance components.

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