ADC FOR BOTH SOLID AREA & BACKGROUND CONTROL
Original Publication Date: 1981-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
In control systems for xerographic copier/duplicators, it is known that the density of solid area development can be controlled by adjusting the bias of the roller of a magnetic brush development device in accordance with information derived from measurement of toner concentration. Since there is no corresponding control for background density, it is customary to set the development roller bias high enough to compensate for the degradation of a new developer charge. The bias set point is generally a compromise between adequate initial solid area and line densities and acceptable background density during the life of the developer.