Patent application number | Description | Published |
20080291480 | Image-based color printer fractal gamut extensions achieved with process set point adjustment - A color management system is provided for enabling imaging of selected colors called spot colors by dynamically adjusting the normal printer gamut to achieve a color gamut extension. Developed toner mass may be increased or decreased by changing ROS laser intensity. Such adjustment can occur on a pixel-by-pixel basis for within page and within sections of the image gamut extension. | 11-27-2008 |
20090190965 | ACTIVE IMAGE STATE CONTROL WITH DISTRIBUTED ACTUATORS AND SENSORS ON DEVELOPMENT ROLLS - Exemplary embodiments provide a roll member that includes one or more controllable cells and methods for making and using the roll member to control an image (or toner) state thereon. The controllable cells can be disposed on a roll substrate and configured in a manner that each controllable cell can be addressed individually and/or as groups. Each controllable cell can be addressable to provide a surface vibration to release toner particles adhered/attracted thereto and can also be capable of sensing the toner state of the roll member and thus to control the image or toner state. In an exemplary embodiment, the disclosed roll member can be used as a donor roll for a development system of an electrophotographic printing machine to create controlled and desired toner powder cloud for high quality image development. | 07-30-2009 |
20090190966 | ACTIVE IMAGE STATE CONTROL WITH LINEAR DISTRIBUTED ACTUATORS ON DEVELOPMENT ROLLS - Exemplary embodiments provide a roll member that includes one or more linear arrays of actuator cells and methods for making and using the roll member. In one embodiment, each linear array of the roll member can be controllably actuated as a group by, e.g., an oscillating voltage, to release toner particles adhered thereto and to form a uniform toner cloud in the development area between the roll member and an image receiving member. The controllable actuation can also aid in the unloading process of the residual toner particles from the roll member. In various embodiments, the uniform toner cloud and/or the controllable unloading process can enable a non-interactive development system for image-on-image full-color printing. | 07-30-2009 |
20090190967 | ADDRESSABLE ACTUATORS FOR A DIGITAL DEVELOPMENT SYSTEM - Exemplary embodiments provide a digital development system and methods for making and using the system. Specifically, the digital development system can utilize a roll member that includes a plurality of actuator cells arranged in a 2-dimensional array with each actuator cell having an actuator membrane individually addressable to eject one or more toner particles adhered thereto. In addition, the digital development system can utilize an imager architecture that includes an addressing logic circuit connected to each cell to selectively control the ejection of the one or more toner particles onto an image receiving member that is closely spaced from each actuator membrane. The disclosed digital development system can be used for non-interactive development systems for image-on-image full-color printing similar to HSD (Hybrid Scavengeless Development) technology with the donor roll becoming a high quality silent imager. | 07-30-2009 |
20090190968 | DIRECT IMAGING SYSTEM WITH ADDRESSABLE ACTUATORS ON A DEVELOPMENT ROLL - Exemplary embodiments provide a direct imaging system and methods for direct marking an image using the system. The disclosed direct imaging system can eliminate the use of at least one of a charge, and/or exposure subsystems in an electrostatographic machine and related processes. Specifically, the direct imaging system can include a direct marking substrate (e.g., a printing substrate) and a development roll member closely spaced from the direct marking substrate. In one embodiment, the development roll member can include a plurality of actuator cells with each actuator cell controllably addressable to eject one or more toner particles adhered thereto. The ejected toner particles can transit the space between the donor roll member and the direct marking substrate, and thereby marking onto the direct marking substrate forming an image. | 07-30-2009 |
20090190969 | DIRECT IMAGING SYSTEM WITH ADDRESSABLE ACTUATORS ON A DEVELOPMENT BELT - Exemplary embodiments provide a direct imaging system and methods for direct marking an image using the system. The disclosed direct imaging system can eliminate the creation of a latent image and can be used in an electrophotographic machine and related processes. Specifically, the direct imaging system can include a direct marking substrate (e.g., a printing substrate) and a development belt member closely spaced from the direct marking substrate. In one embodiment, the development belt member can include a plurality of actuator cells with each actuator cell controllably addressable to eject one or more toner particles adhered thereto. The ejected toner particles can transit the space between the donor belt member and the direct marking substrate, and directly marking onto the direct marking substrate forming an image. | 07-30-2009 |
20100177366 | METHOD, APPARATUS AND SYSTEM FOR MATCHING COLOR GAMUTS OF MULTIPLE IMAGE TRANSFER DEVICES - A method for adjusting the gamuts of a set of printers to match the gamuts across a population of printers using mass targets. The method involves printing color patches suitably positioned in the color gamut with CMYK separations and simultaneously actuating DMA targets to the level 2 controls of the printers using closed loop control algorithms. An extreme MIMO control algorithm is used to converge to the desired L*a*b* targets by adjusting mass targets to the printing system in an iterative fashion to maximize the common intersection gamut across the printers. | 07-15-2010 |
20100245930 | BANNER SHEET-BASED SAMPLING METHOD - The banner or cover sheet for a print job may be used for aperiodic sampling of transfer performance and/or fusing performance. Sensing pre-process and post-process is required. The resulting sampling is aperiodic and dependent on the job flow. In office products there is typically a frequent generation of cover sheets and the information collected in this way can be useful in system performance optimization. The concept is described for a tandem transfer system. | 09-30-2010 |
20110040524 | TONER MASS SENSING PRECISION BY NORMALIZATION TO SUBSTRATE REFLECTANCE AND ADJUSTED FOR TONER MASS LEVEL - A method of normalizing sensor readings includes receiving a reading from a sensor configured to detect light reflected from a substrate; and normalizing the sensor reading based on a function of sensed mass level on the substrate. A processor for implementing the method is also provided. | 02-17-2011 |
20110058184 | LEAST SQUARES BASED EXPOSURE MODULATION FOR BANDING COMPENSATION - A method, system, and computer program product for estimating exposure modulation in an image printing system is disclosed. The method includes determining a banding profile for an image printing system by a processor; determining an adjusted exposure modulation profile based on the banding profile using a least squares estimation by the processor; and printing an output based on the adjusted exposure profile. | 03-10-2011 |
20110058186 | LEAST SQUARES BASED COHERENT MULTIPAGE ANALYSIS OF PRINTER BANDING FOR DIAGNOSTICS AND COMPENSATION - A method, system, and computer program product for estimating a banding profile in an image printing system is disclosed. The method includes obtaining image data across multiple measurement intervals by one or more sensors; combining the image data with timing information into a coherent signal by a processor; estimating periodic and aperiodic components of the coherent signal using least squares estimation by the processor, wherein the periodic component represents a banding profile; and wherein at least the periodic component is used to generate an output. | 03-10-2011 |
20110058226 | BANDING PROFILE ESTIMATION USING SPLINE INTERPOLATION - A method, system, and computer program product for estimating a banding profile in an image printing system is disclosed. The method includes obtaining image data across multiple measurement intervals by a sensor; combining the image data with timing information into a coherent signal by a processor; determining aperiodic components of the coherent signal by the processor; determining the periodic component of the coherent signal using spline interpolation, wherein the periodic component represents a banding profile, by the processor; and printing an output print with a correction applied based on the banding profile. | 03-10-2011 |
20120014566 | MOTION QUALITY ERROR DETECTION IN PRINTING SYSTEMS USING DOCUMENTS HAVING TEXT OR LINE CONTENT - A method for detecting motion quality error of printed documents having text in a printing system includes: printing a document having text lines, each text line comprising a plurality of characters; scanning the printed document to generate a scanned image; detecting positions in a process direction of the printing system of one of text lines and characters in the scanned image; determining position errors in the process direction in the printed document based on the detected positions in the scanned image; determining at least one motion quality defect of the printing system in the process direction based on the determined position errors; and initiating an activity associated with said printing system in response to a motion quality error having been determined. A system for detecting motion quality error of printed documents is also disclosed. | 01-19-2012 |
20120057885 | METHOD FOR COLOR STABILITY DIAGNOSTICS BASED ON CORRELATION ANALYSIS - A diagnostic method for color stability in an image printing system includes printing a test pattern onto output media; measuring, during the printing of the test pattern, an image of the test pattern on an image transfer surface using one or more image transfer surface sensors to obtain one or more image transfer surface signals; measuring a printed image of the test pattern on the output media using a printed image sensor to obtain a printed image signal; calculating correlation functions for the one or more image transfer surface signals and the printed image signal; and analyzing the correlation functions for the one or more image transfer surface signals and the printed image signal to identify a subsystem in the image printing system that causes variations in color within the plurality of prints of the test pattern. | 03-08-2012 |
20130120513 | IMAGE RECEIVING MEMBER WITH INTERNAL SUPPORT FOR INKJET PRINTER - A thin wall ink image receiving member enables the ink image receiving member to reach operational temperatures from a cold state more quickly than image receiving members used in previously known printers. The thin wall image receiving member includes at least one annular support member fixedly mounted against the inner surface of the cylindrical wall to enable the image receiving member to provide adequate pressure in a nip formed with a transfix roller to transfer an ink image from the image receiving member to media in the nip. | 05-16-2013 |
20150029292 | SYSTEMS FOR DAMPENING FLUID REMOVAL, VAPOR CONTROL AND RECOVERY FOR INK-BASED DIGITAL PRINTING - A system for dampening fluid recovery in an ink-based digital printing system includes a seal manifold having a front seal portion, the front seal portion having an upper wall facing the imaging surface, the upper wall being configured to define an air flow channel with the imaging surface, the upper wall being contoured to form a distance between the upper wall and the imaging surface at an evaporation location that is less than distance between the upper wall and the imaging surface at locations interposing the evaporation location and a vacuum inlet channel of the seal manifold. | 01-29-2015 |