Global Patent Index - EP 0973071 A2

EP 0973071 A2 20000119 - Method of using an image forming apparatus

Title (en)

Method of using an image forming apparatus

Title (de)

Verfahren zur Verwendung eines Bilderzeugungsgerätes

Title (fr)

Méthode d'utilisation d'un appareil de formation d'images


EP 0973071 A2 20000119 (EN)


EP 99304271 A 19990601


  • EP 99304271 A 19990601
  • EP 98305581 A 19980714

Abstract (en)

A plurality of electrostatic images are formed on a moving tensioned belt (26) comprising an electrically conductive base (58) having a non-conductive image-carrying surface layer (59). The images are developed by passing the belt through a plurality of toner development stations, each of which includes a development unit (35, 36, 37, 38) including a magnetic roller (51) and a backing member (53), in opposed position to the magnetic roller (51), over which the belt (26) passes. Under non-ideal conditions (defined in the text), the image quality in terms of image density and uniformity of image density and rendition of sharp image transitions, is substantially improved by using an alternating electrical field between the magnetic roller (51) and the belt (26), the peak-to-peak voltage of which is greater than 800 volts. <IMAGE>

IPC 1-7

G03G 15/00; G03G 15/09; G03G 15/01

IPC 8 full level

G03G 15/00 (2006.01); G03G 15/09 (2006.01)

CPC (source: EP)

G03G 15/0907 (2013.01); G03G 15/754 (2013.01); G03G 2215/018 (2013.01)

Designated contracting state (EPC)


DOCDB simple family (publication)

EP 0973071 A2 20000119; EP 0973071 A3 20000705

DOCDB simple family (application)

EP 99304271 A 19990601