US 7,463,851 B2
Device and method for electrophoretic liquid development
Martin Berg, München (Germany); Volkhard Maess, Pliening (Germany); and Martin Schleusener, Namborn (Germany)
Assigned to Oce Printing Systems GmbH, Poing (Germany)
Appl. No. 10/565,250
PCT Filed Jul. 29, 2004, PCT No. PCT/EP2004/008530
§ 371(c)(1), (2), (4) Date Feb. 22, 2007,
PCT Pub. No. WO2005/013013, PCT Pub. Date Feb. 10, 2005.
Claims priority of application No. 103 34 532 (DE), filed on Jul. 29, 2003.
Prior Publication US 2007/0212113 A1, Sep. 13, 2007
Int. Cl. G03G 15/10 (2006.01)
U.S. Cl. 399—237  [399/239; 399/240] 38 Claims
OG exemplary drawing
 
1. A device for transport of liquid developer to an image carrier element for electrophoretic digital printing, comprising:
a developer unit arranged adjacent to the image carrier element, the developer unit directing a liquid developer comprising toner particles to the image carrier element, the toner particles crossing over to the image carrier element corresponding to previously-generated potential images;
a raster unit arranged adjacent to the developer unit, the raster unit transporting the liquid developer to the developer unit by use of a raster;
an electrical voltage applied between the raster unit and the developer unit in order to exert a targeted field effect on the toner particles in a direction towards the developer unit;
a doctor blade chamber comprising a dosing doctor blade arranged adjacent to the raster unit and having said liquid developer comprising said toner particles which are already charged, and from the doctor blade chamber the raster unit accepting the liquid developer via the dosing doctor blade; and
the doctor blade chamber being arranged and operable such that the dosing doctor blade is washed over by said liquid developer.