EP 0675417 A1 19951004 - A method and device for direct electrostatic printing (DEP).
Title (en)
A method and device for direct electrostatic printing (DEP).
Title (de)
Verfahren und Vorrichtung für direktes elektrostatisches Drucken (DEP).
Title (fr)
Procédé et dispositif d'impression électrostatique directe (DEP).
Publication
Application
Priority
- EP 95200603 A 19950314
- EP 94200855 A 19940329
- EP 94201026 A 19940414
Abstract (en)
A method for direct electrostatic printing (DEP) on an intermediate substrate or on a final substrate is provided, using a device that comprises a back electrode (5), a printhead structure (6) comprising a control electrode in combination with apertures (7), a toner delivery means (1) presenting a cloud (4) of toner particles in the vicinity of said apertures (7), characterised in that (i) a multi-component developer is used comprising at least toning particles (toner particles) and magnetic attractable carrier particles and (ii) said toner delivery means is a magnetic brush assembly and said toner cloud is generated directly from said multi-component developer present at the surface of said magnetic brush assembly and (iii) said toner cloud is generated by an oscillating field. The reference surface of said magnetic brush assembly is placed a distance (l) from the surface of the printhead structure facing said magnetic brush assembly, wherein l fulfils the condition : <MATH> wherein all dimensions are expressed in mu m and L is defined as the maximum thickness of the developer layer on said magnetic brush assembly in the absence of said oscillating field. <IMAGE>
IPC 1-7
IPC 8 full level
G03G 15/34 (2006.01)
CPC (source: EP)
G03G 15/346 (2013.01)
Citation (search report)
- [DA] EP 0266960 A2 19880511 - XEROX CORP [US]
- [A] US 5132708 A 19920721 - SCHMIDLIN FRED W [US], et al
- [A] US 5233392 A 19930803 - KITAMURA TETSUYA [JP]
- [Y] PATENT ABSTRACTS OF JAPAN vol. 10, no. 147 (P - 460)<2204> 29 May 1986 (1986-05-29)
- [Y] PATENT ABSTRACTS OF JAPAN vol. 7, no. 177 (M - 233)<1322> 5 August 1983 (1983-08-05)
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 95200603 A 19950314