Patent ID: 7995939
Filing Date: 2011-08-09
Classification: G03G

Abstract:
1. A method for calibrating an image forming device using a toner patch sensor which emits and detects light at a given wavelength in the infrared spectrum comprising: depositing a plurality of toner patches onto a control surface, wherein said toner patches include a first toner patch including a black toner, a second toner patch including said black toner deposited over a non-black toner, and a third toner patch including said non-black toner; measuring signals indicative of the reflectivity of said plurality of toner patches and the reflectivity of said control surface by emitting light of a given wavelength in the infrared spectrum and detecting the amount of incident light reflected from said plurality of toner patches and said control surface, wherein said first toner patch exhibits a first reflectivity R adjusting an operating parameter based upon said measurements.