Toner Concentration Control
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
Toner is automatically added to the developer of a xerographic copier in accordance with a comparison of the light reflected from a toned test patch, and that which is reflected from an untoned test patch, both patches being located in the photoconductor's working image area. The latent electrostatic image of the toned test patch is formed by turning off the copier's document illumination lamp, as one of the two photoconductor image panels passes through the copier's illumination station. The copier's interimage erase lamp, edge erase lamps, and an array of light-emitting diodes (LEDs) are then selectively energized to form an electrostatic image of the to-be-toned test patch on this one photoconductor image area.