METHOD AND DEVICE FOR CONTROLLING THE TIME AT WHICH THE TONER CONCENTRATION IS MEASURED IN A DEVELOPER MIXTURE CONTAINING TONERS AND CARRIERS, AND CORRESPONDING PRINTER OR COPIER

摘要

The invention relates to a method for controlling the time at which the toner concentration is measured in a developer mixture containing toners and carriers. In order to determine the toner concentration in the area of a mixing device, which has a blade roll and which is provided for mixing a developer mixture consisting of toners and carriers, a sensor signal (SS) that is output by a toner concentration sensor located next to the blade roll is analyzed. This sensor signal comprises impulse-shaped peaks (SP) when a blade of the blade roll passes by the toner concentration sensor. The impulse-shaped peak is determined in order to control a measuring window (MF) in such a manner that the measurement of the toner concentration ensues between impulse-shaped peaks (SP).