Global Patent Index - EP 1254559 A2

EP 1254559 A2 2002-11-06 - METHOD AND DEVICE FOR CONTROL OF TONER CONCENTRATION IN AN ELECTROGRAPHIC PROCESS

Title (en)

METHOD AND DEVICE FOR CONTROL OF TONER CONCENTRATION IN AN ELECTROGRAPHIC PROCESS

Title (de)

VERFAHREN UND EINRICHTUNG ZUR REGELUNG DER TONERKONZENTRATION IN EINEM ELEKTROGRAFISCHEN PROZESS

Title (fr)

PROCEDE ET DISPOSITIF DE REGULATION DE LA CONCENTRATION DE TONER DANS UN PROCESSUS ELECTROGRAPHIQUE

Publication

EP 1254559 A2 (DE)

Application

EP 01927648 A

Priority

  • DE 10004868 A
  • DE 10046946 A
  • EP 0101224 W

Abstract (en)

[origin: WO0158135A2] A method for control of an electrographic printing or copying process is disclosed, whereby the information to be printed is formed as a toner first image on a first image support (4, 122a, 130a, 136, 144a) and then transferred onto an image support (2, 114a) from a transfer print surface (130a, 144a) in a transfer print zone (5, 132, 146). A toner mark is generated on an electrographic first image support (4, 130a, 144a), said toner mark on the first image support (4, 122a, 136) is scanned, at least by areas and finally removed from the first image support (4, 122a, 136) again. The toner concentration in a developing station (8) is controlled with the measured value. The transfer of the toner first image from the transfer print surface (130a, 144a) to the image support (2, 114a) is at least temporarily prevented during the period between the creation and removal of the toner mark. Two operating states are thus generated. In the first operating state, values for a toner concentration control are determined. In the second operating state, printing occurs. As electrographic parameters are adjusted to user specific settings during the second operating state, for example, the charge potential of a photoconductor or a developer roller for adopting user specific contrast settings, said parameters are automatically adjusted to pre-set values by a controller during the first operating phase, with which the contrast level is set.

IPC 1-7 (main, further and additional classification)

H04N 1/00

IPC 8 full level (invention and additional information)

G03G 15/00 (2006.01); G03G 15/08 (2006.01)

CPC (invention and additional information)

G03G 15/5041 (2013.01); G03G 15/0849 (2013.01); G03G 15/0855 (2013.01); G03G 2215/00042 (2013.01)

Citation (search report)

See references of WO 0158135A3

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

WO 0158135 A2 20010809; WO 0158135 A3 20011220; EP 1254559 A2 20021106

INPADOC legal status


2012-07-25 [18W] WITHDRAWN

- Effective date: 20120620

2004-05-12 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): DE FR GB

2003-11-12 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20030924

2002-11-06 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020808

2002-11-06 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR