Patent ID: 8553289
Filing Date: 2013-10-08
Classification: B41J

Abstract:
1. A method for compensation of banding in a marking platform, comprising: a) initiating a signature learning mode to determine banding characteristics of a marking platform, the marking platform comprising a plurality of marking modules at least a portion of which are select marking modules, each select marking module being a potential banding source such that a fundamental frequency for banding characteristics associated with each select marking module is known; b) establishing a timing reference after the plurality of marking modules have achieved a relatively constant velocity in conjunction with the signature learning mode; c) marking a banding test pattern on an image receiving member over at least multiple intervals of a lowest fundamental frequency among the select marking modules; d) obtaining banding image data for the banding test pattern from a test pattern image sensor in conjunction with the marking in c); and e) processing the banding image data in relation to the timing reference to form a banding profile for each of one or more banding sources within the marking platform, wherein the fundamental frequency for each banding source is used to determine banding characteristics attributed to the corresponding banding source and filter banding characteristics not attributed to the corresponding banding source for the corresponding banding profile, each banding profile reflecting a phase relation of amplitude and frequency banding characteristics to the timing reference for the corresponding banding source.