XEROGRAPHIC COPIER CONTROL MEANS AND METHOD

摘要

A xerographic copier includes a control system including a central processor (201). Outputs (207 to 211) of the processor are applied, during start up of the machine, to generate a stepped grey scale on the photoconductor. This grey scale is sensed by a patch sensor system (106) to develop a series of stored signals in the processor corresponding to levels in the grey scale. These signals are employed for subsequent density control.