Automatic Sampling of Copier Drum Current
Original Publication Date: 1980-Jan-01
Included in the Prior Art Database: 2005-Feb-13
This is a circuit to perform an analog-to-digital conversion of measured current from photoreceptive material within an electrophotographic copier machine for purposes of corona alignment and assessing corona or optical contamination. The circuit is controlled by the machine micro-processor to gate the drum circuit so as to remove drum seal perturbation from the measurements. In that manner measurements can be taken and read out on the machine display, thus avoiding the use of external meters.