Abstract: A printer or copier has a developer station which uses a developer mix such as tone and developer. A temperature sensor is provided in the developer station to sense the temperature of the developer mix. The signal of the temperature sensor is fed to a control unit which effects a control of the copier or printer operation, such as by halting operation, effecting cooling, or triggering a warning signal when the temperature reaches an upper boundary.

Abstract: A printer or copier has an intermediate carrier for applying toner to the recording medium. Used toner is scraped off the intermediate carrier and carried away by a conveyor helix. The conveyor helix is of a spring wire and a resistance element is provided extending between coils of the conveyor helix to intermittently catch and release the spring wire so as to cause wobbling of the conveyor helix and prevent sticking of the used toner.

Abstract: In a developing station functioning on the principle of cross-blending in an electrophotographic printing device, two mixing screws running in opposite directions are arranged at a distance from one another. The first mixing screw is situated in a mixing trough provided with a plurality of oblique slots and comprises two mixing strips in the delivery region of the developer mix which are offset by 180.degree. and which neighbor one another. A scraper strip having an actual scraping region and scraping teeth is situated above the two mixing screws. A metering baffle is arranged at an angle relative to this scraper strip, this metering baffle extending through the teeth of the scraper strip and including baffles at its lower end for controlling the flow of the developer mix.

Abstract: A device for filling and filtering toner from a supply container which is placed by an operator in communication with a feed container in a photocopier has a cylindrical filling opening for the feed container with a cross section such that the supply container can be inverted therein, and has a filter basket disposed in the region of the filling opening which is closed from the feed container by a filter mesh, and an electric vibrator connected thereto by a linkage which can be automatically triggered at the beginning of a filling operation.

Abstract: Developer mix is regenerated in a manner which removes toner crust from carrier particles in order to extend the useful time of a developer mix within a developer station of an electrophotographic printing or copying machine. A portion of developer mix is continuously or periodically removed from the main body of developer mix in the developer station and supplied to a regenerator device where the developer particles are exposed to impacts flaking off the toner crust formations. The regenerated developer mix is then recycled back to the main body of mix at the developer station. This regeneration and recycling of developer mix serves to hold substantially constant the efficacy of the developer mixture.

Abstract: Developer mix is regenerated in a manner which removes toner crusts from carrier particles in order to extend the useful time of a developer mix within a developer station of an electrophotographic printing or copying machine. A portion of the developer mix is continuously removed from the main body of developer mix in the developer station and supplied to a regenerator device where the developer particles are swirled and impacted to flake off the toner crust formations. The regenerator device is formed with a discharge opening for removal of the cleaned or regenerated developer mix. The discharge nozzle is connected to a recirculation line through which the regenerated mix is conducted back into the developer station. The regenerator device is further provided with an extraction opening for removing the flaked off crust particles to a separate area, such that crust particle deposits are prevented from building up in the regenerator device.

Abstract: For the raking and otherwise disaggregation of powdery material in a reservoir chamber, there is provided an agitator unit comprising a laterally extending shaft disposed for rotation in the reservoir on which is mounted a pair of laterally spaced disks with strip lengths or cables stretched between the disks. The cables serve to provide a raking surface which prevents the powdery material from clumping and the agitator unit is rotated in the reservoir. The opposed ends of the cables are connected to the disks by means of clamping devices which are interchangeably disposed in corresponding bores formed along the outer edges of the disks. Each clamping device comprises a bush part having a lateral passage for receiving therethrough a corresponding free end of the cable. The bush is rigidly connected to the free end of the cable by means of a compressed or pinched fit and the bush is secured in the disk bore as the result of suitable stop surface means.