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    IMAGE BASED LEARNING CORRECTION FOR MITIGATING THERMAL GHOSTING IN A DIGITAL PRINTER
    2.
    发明申请
    IMAGE BASED LEARNING CORRECTION FOR MITIGATING THERMAL GHOSTING IN A DIGITAL PRINTER 有权

    公开(公告)号：US20220392039A1

    公开(公告)日：2022-12-08

    申请号：US17336729

    申请日：2021-06-02

    Applicant: Xerox Corporation

    Inventor： Joseph C. SHEFLIN ,  Jack T. LESTRANGE ,  Palghat S. RAMESH

    IPC: G06T7/00 ,  G03F7/20 ,  G01J5/00

    Abstract: An image based correction system compensates for the image quality artifacts induced by thermal ghosting on evolving imaging member surfaces. With thermal ghosting directly tied to previous image content, a feed forward system determines thermal ghosting artifacts based on images previously rendered and generates an open loop gray-level correction to a current image that mitigates undesirable ghosting. For example, the correction system compensates for the thermal ghosting by making the current image “lighter” in areas that will be imaged onto warmer blanket regions, thereby cancelling out TRC differences between different temperature regions. A temperature sensor is used to measure the temperature of the imaging blanket due to the stresses induced by the image. This data is used to learn the parameters of the temperature model periodically during operation, and used in subsequent corrections to mitigate thermal ghosting in spite of changes in blanket properties over use and time.

    FOUNTAIN SOLUTION THICKNESS MEASUREMENT USING PRINT ENGINE RESPONSE
    3.
    发明申请
    FOUNTAIN SOLUTION THICKNESS MEASUREMENT USING PRINT ENGINE RESPONSE 有权

    公开(公告)号：US20210402754A1

    公开(公告)日：2021-12-30

    申请号：US16913302

    申请日：2020-06-26

    Applicant: Xerox Corporation

    Inventor： Joseph C. SHEFLIN ,  Jack T. LESTRANGE ,  Anthony S. CONDELLO ,  Palghat S. RAMESH ,  Brian M. BALTHASAR

    IPC: B41F31/02 ,  B41F31/13

    Abstract: Examples of the preferred embodiments use printed content (e.g., halftones, difference in grayscale or darkness) to determine thickness of fountain solution applied by a fountain solution applicator on an imaging member surface and/or determine image forming device real-time image forming modifications for subsequent printings. For example, in real-time during the printing of a print job, a sensor may measure halftones or grayscale differences between printed content and non-printed content of a current printing on print substrate. Based on this measurement of printed content output from the image forming device, the image forming device may adjust image forming (e.g., fountain solution deposition flow rate, imaging member rotation speed) to reach or maintain a preferred fountain solution thickness on the imaging member surface for subsequent (e.g., next) printings of the print job.

    MATRIX ADDRESSABLE, LINE LASER, MARKING SYSTEM USING LASER ADDITIVES
    4.
    发明公开
    MATRIX ADDRESSABLE, LINE LASER, MARKING SYSTEM USING LASER ADDITIVES 审中-公开

    公开(公告)号：US20230158811A1

    公开(公告)日：2023-05-25

    申请号：US17531098

    申请日：2021-11-19

    Applicant: Xerox Corporation

    Inventor： Peter J. KNAUSDORF ,  Anthony S. CONDELLO ,  Jack T. LESTRANGE ,  Palghat S. RAMESH ,  Joseph C. SHEFLIN

    IPC: B41J2/47 ,  B41M5/26 ,  G02B26/08 ,  G02B7/18

    CPC classification number: B41J2/471 ,  B41M5/267 ,  G02B26/0833 ,  G02B7/1815

    Abstract: Apparatus and method for using a line laser (LL) to quickly mark a substrate or media by utilizing a laser additive on/within the substrate/media, which greatly reduces the power requirement for marking the substrate/media. The combination of the LL wide swath (>305 mm) and the improved media/surface sensitivity to laser wavelength allows the LL marking system to achieve faster marking than other systems. The LL is mounted over a transport which transports the sensitized substrate/media past the LL for marking. The desired image is projected from the LL line by line in synch with the moving media and once the media passes the beam path of the LL, marking is complete. In this case, the media has been physically-altered via the heat generated by the LL interacting with the photosensitized media and is permanent. A second method would use a photosensitizing agent coated on top of the media to be marked.

    LIQUID METAL DROP MASS MEASUREMENT AND METHODS THEREOF
    5.
    发明申请
    LIQUID METAL DROP MASS MEASUREMENT AND METHODS THEREOF 有权

    公开(公告)号：US20230076563A1

    公开(公告)日：2023-03-09

    申请号：US17447174

    申请日：2021-09-08

    Applicant: XEROX CORPORATION

    Inventor： Joseph C. SHEFLIN ,  Peter KNAUSDORF

    IPC: B22F10/85 ,  B33Y10/00 ,  B33Y50/02 ,  B22F10/22 ,  B22D23/00 ,  B29C64/118 ,  B29C64/393

    Abstract: A method of controlling drop mass in a liquid ejector is disclosed which includes advancing a printing material feed source to introduce a quantity of a printing material into a liquid ejector, counting a quantity of ticks produced by an encoder coupled to the printing material source during a time period to calculate a mass of the printing material, counting a quantity of pulses produced by the liquid ejector during the time period, and entering into a control system the quantity of ticks produced by the encoder and the quantity of pulses produced by the liquid ejector. The method may include comparing the quantity of printing material calculated by using the quantity of ticks produced by the encoder to the quantity of printing material measured by using a level sensing system. The method of controlling drop mass in a liquid ejector may include steps performed by a microprocessor.

    INSPECTION SYSTEM FOR THREE-DIMENSIONAL PRINTER AND METHODS THEREOF
    7.
    发明公开
    INSPECTION SYSTEM FOR THREE-DIMENSIONAL PRINTER AND METHODS THEREOF 审中-公开

    公开(公告)号：US20240173972A1

    公开(公告)日：2024-05-30

    申请号：US18059643

    申请日：2022-11-29

    Applicant: XEROX CORPORATION

    Inventor： Peter KNAUSDORF ,  Sakib ZARGAR ,  Joseph C. SHEFLIN ,  Palghat S. RAMESH ,  Collin Alexander LADD ,  Chu-Heng LIU ,  Paul J. McCONVILLE

    IPC: B41J2/045 ,  G06V10/25 ,  G06V10/764 ,  G06V10/82

    CPC classification number: B41J2/0456 ,  G06V10/25 ,  G06V10/764 ,  G06V10/82

    Abstract: A printing system and method of inspecting drop ejection in a printing system is disclosed. The method includes capturing an image of each of a plurality of drops of a print material after ejection from an ejector of a printing system, creating a temporally averaged image from each image of the plurality of drops of print material, and classifying one of the plurality of drops of print material based on the temporally averaged image that was created. The use of a pretrained convolutional neural network for classifying one of the plurality of drops and comparing the temporally averaged image to another temporally averaged image to classify one of the plurality of drops may be employed. The printing system also includes a camera with a high-speed shutter where the shutter is synchronized to an ejector pulse, and a video analytic framework coupled to the ejector and the camera configured to generate a jetting result for each of the one or more drops of liquid print material.

    LIQUID METAL EJECTOR LEVEL SENSING SYSTEM AND METHODS THEREOF
    8.
    发明公开
    LIQUID METAL EJECTOR LEVEL SENSING SYSTEM AND METHODS THEREOF 审中-公开

    公开(公告)号：US20230241670A1

    公开(公告)日：2023-08-03

    申请号：US18298847

    申请日：2023-04-11

    Applicant: XEROX CORPORATION

    Inventor： Joseph C. SHEFLIN ,  Jason M. LeFEVRE

    IPC: B22D46/00 ,  B33Y50/02 ,  B33Y10/00 ,  B22D23/00

    CPC classification number: B22D46/00 ,  B33Y50/02 ,  B33Y10/00 ,  B22D23/003

    Abstract: A method of controlling sensing level in a liquid ejector is disclosed. The method includes filling a reservoir in communication with a liquid ejector with a printing material to a first level set point, receiving a drop out signal from a laser-based level sensor that reads from a surface of a melt pool in the reservoir, pausing an operation of the liquid ejector, adjusting the printing material level set point to a second level set point of printing material in reservoir that is higher than the first level set point, increasing a quantity of printing material in the reservoir to fill the reservoir to the second level set point, and resuming the operation of the liquid ejector.

    AIRFLOW CONTROL IN A PRINTING SYSTEM USING A MOVABLE BAFFLE, AND RELATED DEVICES, SYSTEMS, AND METHODS
    10.
    发明申请
    AIRFLOW CONTROL IN A PRINTING SYSTEM USING A MOVABLE BAFFLE, AND RELATED DEVICES, SYSTEMS, AND METHODS 有权

    公开(公告)号：US20220314647A1

    公开(公告)日：2022-10-06

    申请号：US17217388

    申请日：2021-03-30

    Applicant: XEROX CORPORATION

    Inventor： Peter John KNAUSDORF ,  Anthony Salvatore CONDELLO ,  Jack T. LESTRANGE ,  Palghat S. RAMESH ,  Joseph C. SHEFLIN

    IPC: B41J11/00

    Abstract: A printing system comprises an ink deposition assembly, a media transport device, and an airflow control system. The ink deposition assembly comprises a printhead to eject ink through a carrier plate opening in a carrier plate. The media transport device holds a print medium against a movable support surface by vacuum suction and transports the print media through a deposition region. The airflow control system comprises a baffle that is movable between an upstream-blocking configuration and a downstream-blocking configuration, and an actuator configured to move the baffle. In the upstream-blocking configuration the baffle blocks airflow through an upstream side of the printhead opening while allowing airflow through a downstream side of the printhead opening. In the downstream-blocking configuration the baffle blocks airflow through the downstream side of the printhead opening while allowing airflow through the upstream side of the printhead opening.

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