AUTOMATIC TONER CONCENTRATION CONTROL
Original Publication Date: 1987-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
Automatic Developer Control Systems suffer from several shortcomings. They often use D.C. signals which are subject to drift, there are significant phase lags around the control loop, sensor response is usually non-linear and dirt build up can be a problem for systems that use optical detection.