Patent ID: 7433613
Filing Date: 2008-10-07
Classification: G03G

Abstract:
1. A method for setting toner concentration of a toner particle-carrier particle mixture in a developer station for development of a latent charge image on an intermediate carrier of an electrographic printer or copier, comprising the steps of: with a sensor arranged in the developer station, measuring toner concentration in the mixture at an installation location of the sensor remote from a location at which toner is extracted for development of the latent image; with an actuator adjusting toner feed in the developer station; determining a current toner consumption value for toner particles and correcting that current toner consumption value to adjust for a difference between the sensor installation location and the toner extraction location; calculating from the toner concentration measured at said sensor installation location and from the corrected toner consumption value a toner concentration at the toner extraction location; and inputting the calculated toner concentration at the toner extraction location as a control variable to a regulator, and with the regulator controlling the actuator such that the calculated toner concentration at the toner extraction location approaches a desired value.