Patent application number | Description | Published |
20090003729 | Fiducial artifact detection and compensation algorithm - Defects in an image forming system may give rise to scratched fiducials, missing fiducial regions, or other defects in an image that can run parallel to the process direction. The present disclosure provides for a fiducial compensation method and system for detecting defects thereby allowing spatial tone reproduction curves to be calculated and applied to a digital image in order to eliminate printed streaks due to a photoreceptor's non-uniformities. | 01-01-2009 |
20090092408 | Measurement of engine response curve in the presence of process direction noise - Disclosed is a method and system for compensating for printer cross-process nonuniformity. The method and system provide a means to offset a cross-process uniformity profile associated with an image output device, such as a printer, where process direction noise is measured and the cross-process uniformity profile is adjusted accordingly to provide a better representation of the image output device cross-process uniformity profile. | 04-09-2009 |
20100013882 | CONTINUOUS WEB PRINTING SYSTEM ALIGNMENT METHOD - A method of aligning a printhead is described herein. The method includes accelerating a media along a process path, controlling a first printhead to form a first mark upon the accelerating media, detecting the first mark on the accelerating media, comparing a first mark detection data with first printhead desired alignment data, determining a first correction based upon the comparison of the first mark detection data, and modifying an alignment of the first printhead based upon the determined first correction. | 01-21-2010 |
20100020121 | SYSTEMS AND METHODS FOR MONITORING JETS WITH FULL WIDTH ARRAY LINEAR SENSORS - Systems and methods are provided for monitoring jets of an image device. The detection is implemented using a data processor that monitors information sent to a jet and using an image sensor that monitors an image being printed or an image after being printed. A detector detects the difference between the image being printed and/or the image after printing to the information sent to the jet, and identifies a faulty jet based on the difference detected. | 01-28-2010 |
20100209160 | SYSTEM AND METHOD FOR CROSS-PROCESS CONTROL OF CONTINUOUS WEB PRINTING SYSTEM - A system and method for controlling the cross-process position of ink print heads including identifying a first roll error frequency related to a circumference of a first roll, identifying a first roll error phase with respect to a reference location along a process path, identifying a first roll error amplitude of cross-process motion, identifying a second roll error frequency related to a circumference of a second roll, identifying a second roll error phase with respect to the reference location, identifying a second roll error amplitude of cross-process motion, and controlling the cross-process position of a first and second print head based upon the identified first roll error frequency, first roll error phase, first roll error amplitude, second roll error frequency, second roll error phase, and second roll error amplitude, wherein the first print head is axially spaced apart from the second print head along the process direction. | 08-19-2010 |
20100315461 | SENSOR CALIBRATION FOR ROBUST CROSS-PROCESS REGISTRATION MEASUREMENT - Systems and methods are provided for calibrating a sensory array to ensure a robust cross-process registration measurement. The calibration is implemented using a calibration step that determines the signature error amount of a given image reading sensor. The signature error amount for the sensor is stored in a signature error look-up table. When the sensors are used to sense print head alignment, the correction may be implemented by accessing the signature error look-up table for the given sensor when calibrating the print heads. The signature error look-up table provides an amount of offset for each sensor that is used in determining the appropriate head position of a given print head to calibrate the print heads for the signature error associated with the given sensor. | 12-16-2010 |
20130148172 | PRINTING SYSTEM, RASTER OUPUT SCANNER, AND METHOD WITH ELECTRONIC BANDING COMPENSATION USING FACET-DEPENDENT SMILE CORRECTION - Raster Output Scanners and printing systems are presented along with methods for mitigating banding in printing systems, in which electronic banding compensation is employed using cross-process direction light source intensity banding correction profiles tailored to corresponding reflective facets of a rotating polygon. | 06-13-2013 |
20130163055 | PROCESS FOR CREATING FACET-SPECIFIC ELECTRONIC BANDING COMPENSATION PROFILES FOR RASTER OUTPUT SCANNERS - Processes are presented for creating electronic banding compensation profiles for raster output scanner (ROS) devices by printing and scanning a test pattern having a series of strips extending along a process direction and spaced from one another along a cross process (fast scan) direction, analyzing the scanned data to determine facet-specific banding errors corresponding to individual strips, and selectively adjusting banding correction profiles to counteract the banding errors. | 06-27-2013 |