Patent ID: 6377758
Filing Date: 2002-04-23
Classification: G03G,H04N

Abstract:
In an image reproducing apparatus, a method for detecting defects of an intermediate imaging member to analyze the intermediate imaging member, said intermediate imaging member receiving an image to transfer the image to a printing substrate, said method comprising the steps of:(a) providing a half-tone test patches to print in the image reproducing apparatus, each said half-tone test patch having an original half-tone value and each said half-tone test patch having a different half-tone value than other test patches for print the image; (b) printing the half-tone test patches on the printing substrates, said half-tone image test patches with the different half-tone values are printed consecutively using all area of the intermediate imaging member, each of the half-tone value is using each area of the intermediate imaging member; (c) scanning the half-tone test patches to obtain half-tone values for the printed half-tone test patches; (d) comparing the half-tone values of the printed half-tone test patches with the original half-tone values; and (e) detecting defects in each area of the intermediate imaging member based on the comparison to determine whether the intermediate imaging member is appropriate for reproducing an image.