Patent ID: 7210758

Claim:
A method for calibration of paper feed in an ink jet printing system to remove overfeed bands and underfeed bands from an image, wherein the ink jet printing system comprises rollers for vertical feed, wherein the method comprises the steps of: a. feeding print media into the ink jet printing system; b. forming a color density test target adapted to shift from light to dark to light in order to identify a maximum optical density region, wherein the color density test target is formed by simultaneously i. applying an on/off pattern print mask to print a plurality of print swaths, wherein the on/off pattern print mask is susceptible to vertical feed changes in the ink jet printing system; and ii. incrementing paper feed values, wherein each paper feed value corresponds respectively to each print swath; c. selecting the paper feed value from the color density test target that corresponds to a maximum optical density region on the color density test target; and d. inputting the paper feed value that corresponds to the maximum optical density region into the ink jet printing system to calibrate the printing system in order to minimize the presence of overfeed bands and underfeed bands while printing.