Patent · US Expired

Device for direct electrostatic printing with a conventional printhead structure and AC-coupling to the control electrodes

US6109731A · kind A · utility

1Cited by

10References

6Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Danny Van Gemert · Hulshout, BE
Raf Peymen · Lommel, BE
Jacques Leonard · Ekeren, BE
Hilbrand Van den Wijngaert · Grobbendonk, BE
Guido Desie · Mortsel, BE

Key dates

Filing date	Oct 20, 1998
Grant date	Aug 29, 2000
Priority date	—
Expiry date	Oct 20, 2018

Classification

Technology area (CPC G)Physics
CPC primaryG03G2217/0025
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A direct electrostatic printing device includes a printhead structure with apertures and control electrodes associated with the apertures for delivering toner from a toner source to a substrate in accordance with image data. A first voltage source is provided to establish a flow of toner particles from the toner source to the substrate. A second voltage source is provided to establish a control voltage between the toner source and the control electrodes to control toner flow in accordance with the image data. The second voltage source provides a first AC field between a toner source and the control electrodes to permit toner flow and a second, diminished, AC field between the toner source and the control electrodes in order to stop the toner flow.

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