EP 0740224 A1 19961030 - A device for DEP (direct electrostatic printing)
Title (en)
A device for DEP (direct electrostatic printing)
Title (de)
Direkte elektrostatische Druckvorrichtung (DEP)
Title (fr)
Imprimante électrostatographique directe (DEP)
Publication
Application
Priority
- EP 96200890 A 19960402
- EP 95201048 A 19950425
- EP 95201269 A 19950516
Abstract (en)
There is provided a device for direct electrostatic printing comprising a back electrode (105), a printhead structure (106), an array of printing apertures (107) in said printhead structure (106) through which a particle flow can be electrically modulated by a control electrode (106a), an image receiving substrate (109) travelling between said back electrode (105) and said printhead structure (106) in the direction of arrow A and toner delivery means (101), comprising a charged toner conveyer (103), the reference surface of said charged toner conveyer being placed at a distance B (in mm) from the front of said printhead structure (106), and a magnetic brush to provide charged toner on to the CTC, wherein the linear surface speed of the magnetic brush LSM has a specified minimal ratio versus the travelling speed LSS of the image receiving substrate, such that LSM/LSS >/= 0.5. In a preferred embodiment the surface speed of the CTC LSC has also a specified minimal ratio versus the travelling speed LSS of the image receiving substrate, such that LSC/LSS >/= 0.5. In a further preferred embodiment the surface speed of the magnetic brush LSM has a also a specified minimal ratio versus the linear surface speed LSC of the CTC, such that LSM/LSC >/= 0.5. More over the radius of the CTC is chosen as a function of the extension of the array of printing apertures present in the printhead structure. <IMAGE>
IPC 1-7
IPC 8 full level
B41J 2/415 (2006.01); G03G 15/34 (2006.01)
CPC (source: EP)
B41J 2/4155 (2013.01); G03G 15/346 (2013.01); G03G 2217/0025 (2013.01)
Citation (search report)
- [DA] US 5040004 A 19910813 - SCHMIDLIN FRED W [US], et al
- [A] US 4743926 A 19880510 - SCHMIDLIN FRED W [US], et al
- [A] US 3779166 A 19731218 - FROHBACH HUGH F [US], et al
- [A] US 5298358 A 19940329 - RUBIN BRUCE J [US], et al
- [AD] US 5214451 A 19930525 - SCHMIDLIN FRED [US], et al
- [A] US 5204696 A 19930420 - SCHMIDLIN FRED [US], et al
- [A] WO 9426527 A1 19941124 - ARRAY PRINTERS AB [SE]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 96200890 A 19960402