Abstract: An exposure means is provided between a development region and a carrier stripping drum that removes carrier particles, being provided inside the developer station of a non-mechanical fast data printer means. The exposure means illuminates and thereby discharges the highly charged and non-toner-covered regions of the surface of a charge image carrier. The adhesion of negative carrier particles of the developer mix to the non-exposed regions of the surface of the charge image carrier is thus reduced, so that they can be easily stripped from the surface of the charge image carrier by the following carrier stripping drum.

Abstract: An isorunning-counterrunning developer station comprises a plurality of isorunning developer drums moving isodirectionally with the charge image carrier and one counterruning developer drum. A developer mix is offered to the first isorunning developer drum via a paddle wheel proceeding from a supply chamber and is conducted from the first isorunning developer drum to the counterrunning developer drum via further isorunning developer drums. An exposure means composed of a transparent protective tube having a LED strip contained therein is provided above the developer drum, this exposure means being in turn followed by a carrier stripper drum.

Abstract: In a developer station for an electrophotographic printing or copying machine, there is provided apparatus which serves to assure a uniform layer thickness and density of developer mix to be conducted by the developer roller to the inking gap with a charge image carrier. This apparatus comprises a stripping roller which is mounted for rotation in the same direction as the developing roller and is arranged adjacent to the developing roller for defining therebetween a nip area through which developer mix must pass in route to the inking gap. The stripping roller serves to define an even level thickness for the developer mix being conducted to the inking gap by stripping away an upper portion of the developer mix layer for return to the main body of developer mix disposed in the lower region of the developer station. A guide plate is disposed beneath the striping roller about the lower end of the developer roller for defining a gap opening between its lead edge and the stripping roller.

Abstract: In a developer station for an electrophotographic printing or copying machine, there is provided apparatus which affords effective intermixing of carrier and toner particles in the developer mix and which enables the developer mix to be removed from the station prior to replacement in an automatic and simplified fashion. Transport and developer rollers are mounted in the station for conducting developer mix from a supply chamber to communication with a charge image carrier. A pair of rotary screws are disposed in the station on one side of the rollers with conveyance directions opposite to one another for conducting developer mix back and forth through the station enabling fresh toner to blend into the developer mix and maintaining uniform mixing of toner and carrier particles of the mix.

Abstract: A support assembly for the components of one or more operating units associated with an intermediate carrier of an electrostatic copier. The components are arranged in a carriage member which is slide supported on frame members of the copier to be movable axially of the intermediate carrier drum. The components within a carriage are supported for movement towards and away from the drum surface.

Abstract: A toner feeding assembly for feeding a developer mixture of a toner and carrier particles to an intermediate carrier which has been electrostatically charged, the feeder mechanism employing magnetic brushes of the rotating cylinder type, at least one of the brushes being adjacent the intermediate carrier. An excess toner deflecting guide member is positioned adjacent the magnetic brush-intermediate carrier nip having one long side edge projecting towards the nip and an opposite long side edge positioned away from the nip and below the one edge. The guide is effective to direct a film of developer mixture away from the nip area and back to a developer mixture reservoir.