Patent · US Expired

Direct electrostatic printing apparatus having a magnetic brush with a core rotating at high speed

US6151047A · kind A · utility

1Cited by

4References

5Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Guido Desie · Mortsel, BE
Dirk Broddin · Edegem, BE

Key dates

Filing date	Aug 6, 1997
Grant date	Nov 21, 2000
Priority date	—
Expiry date	Aug 6, 2017

Classification

Technology area (CPC G)Physics
CPC primaryG03G2217/0025
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A DEP device is provided that comprises a printhead structure with control electrodes in combination with printing apertures and a magnetic brush assembly delivering a cloud of toner particles in the vicinity of the printing apertures, wherein the toner particles are, together with magnetically attractable carrier particles part of a multi-component developer further and the magnetic brush comprises a magnetic core rotating at a speed equal to or higher than 500 rpm (rotations per minute) and a sleeve rotating at a speed equal to or lower than 10 rpm (rotations per minute).

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