Patent Document ID: 4348100
Application ID: 06183133
Patent Status: 1

Claim One:
1. In a system having a xerographic section with xerographic processing components for producing and developing images on a charged photoreceptor for transfer to copy substrate material and a scanning section with scanning components to scan images on said photoreceptor to produce signals representative of the images scanned, said scanning section including thresholding means for processing image signals produced by scanning images on said photoreceptor and a source of threshold reference signals; the combination of: (a) means for generating a test image for processing by said xerographic section and scanning by said scanning section; (b) comparator means for comparing the signals produced by scanning said test image with said threshold reference signals to provide threshold calibration signals for adjusting the threshold level of said thresholding means; and (c) control means for adjusting the threshold level of said thresholding means in response to said threshold calibration signals.