公开(公告)号：US12070945B2

公开(公告)日：2024-08-27

申请号：US17806212

申请日：2022-06-09

Applicant: Xerox Corporation

Inventor： Jorge A. Alvarez ,  Jason M. LeFevre ,  Seemit Praharaj ,  Chu-Heng Liu ,  Douglas K. Herrmann

IPC: G06T7/13 ,  B41J2/125 ,  B41J2/21 ,  G06T7/00

CPC classification number: B41J2/125 ,  B41J2/2132 ,  G06T7/0004 ,  G06T7/13 ,  G06T2207/30144

Abstract: A method of operating a printer identifies image areas and image features in ink image content data that are likely to produce ink blur within an ink image. The ink image content data for these areas and features is modified to attenuate the appearance of ink blur. The image areas identified as being likely to produce ink blur are the trailing edge and the side edges of the ink image content data. The modification of the ink image content data for the features and predetermined areas improves the quality of the printed ink image.

公开(公告)号：US20240083165A1

公开(公告)日：2024-03-14

申请号：US17932165

申请日：2022-09-14

Applicant: Xerox Corporation

Inventor： Seemit Praharaj ,  Jason M. LeFevre ,  Douglas K. Herrmann ,  Chu-Heng Liu ,  Jorge A. Alvarez

IPC: B41J2/045 ,  G06K15/00 ,  G06K15/02 ,  G06K15/10

CPC classification number: B41J2/04558 ,  B41J2/04586 ,  G06K15/102 ,  G06K15/1823 ,  G06K15/408

Abstract: A method of operating a printer identifies image areas in ink image content data that are likely to affected by airflow disturbances to produce ink blur within an ink image. Inkjets farthest from these areas are selected to eject ink drops into these areas to form portions of an ink image. The image areas identified as being likely to produce ink blur are the leading edge, trailing edge, and side edge of the ink image content data. The ink drops ejected by these selected inkjets and their satellites are less likely to be affected adversely by the airflow disturbances.

公开(公告)号：US11912045B2

公开(公告)日：2024-02-27

申请号：US17656407

申请日：2022-03-24

Applicant: Xerox Corporation

Inventor： Jason M. LeFevre ,  Seemit Praharaj ,  Douglas K. Herrmann ,  Chu-Heng Liu ,  Jorge A. Alvarez

IPC: B41J29/393 ,  B41J2/21

CPC classification number: B41J29/393 ,  B41J2/2135 ,  B41J2/2139

Abstract: A method of operating a printer evaluates the effect of printing a print job with two different orientations of the image content data for the print job. The orientation that produces the least increase in the cross-process direction displacement error for the inkjets in the printer is selected for printing the print job. By attenuating the increase in cross-process direction displacement error, the interval between printhead maintenance operations is increased.

公开(公告)号：US20230309404A1

公开(公告)日：2023-09-28

申请号：US17656404

申请日：2022-03-24

Applicant: Xerox Corporation

Inventor： Douglas K. Herrmann ,  Jason M. LeFevre ,  Seemit Praharaj ,  Chu-Heng Liu ,  Jorge A. Alvarez

IPC: H01L35/28 ,  B41J2/045 ,  H01L35/12

CPC classification number: H01L35/28 ,  B41J2/04563 ,  B41J2/04581 ,  H01L35/12

Abstract: An inkjet printer includes a pair of temperature regulation modules mounted on opposite sides of each printhead in the printer. Each temperature regulation module includes a thermoelectric cooling device that is activated by a controller when the temperature of the printhead exceeds a predetermined setpoint. By cooling the printheads, the temperature of the printheads can be kept in a temperature range that enables fast drying inks to obtain their optimal performance and that prevents duplex printing operations from raising the temperature of the printheads significantly above the predetermined setpoint.

公开(公告)号：US20230302833A1

公开(公告)日：2023-09-28

申请号：US17656407

申请日：2022-03-24

Applicant: Xerox Corporation

Inventor： Jason M. LeFevre ,  Seemit Praharaj ,  Douglas K. Herrmann ,  Chu-Heng Liu ,  Jorge A. Alvarez

IPC: B41J29/393 ,  B41J2/21

CPC classification number: B41J29/393 ,  B41J2/2139 ,  B41J2/2135

Abstract: A method of operating a printer evaluates the effect of printing a print job with two different orientations of the image content data for the print job. The orientation that produces the least increase in the cross-process direction displacement error for the inkjets in the printer is selected for printing the print job. By attenuating the increase in cross-process direction displacement error, the interval between printhead maintenance operations is increased.

公开(公告)号：US11738574B2

公开(公告)日：2023-08-29

申请号：US17218887

申请日：2021-03-31

Applicant: XEROX CORPORATION

Inventor： Chu-Heng Liu ,  Douglas K. Herrmann ,  Jason M. LeFevre ,  Paul J. McConville ,  Seemit Praharaj

IPC: B41J2/01 ,  B41J11/00

CPC classification number: B41J11/0085

Abstract: A printing system comprises a printhead to eject a print fluid to a deposition region. Print media are held against a movable support surface via vacuum suction, and the movable support surface transports the print media through the deposition region. A vacuum plenum comprises a vacuum platen over which the movable support surface moves. The vacuum platen has platen holes that communicate the vacuum suction from the vacuum plenum to the movable support surface. An airflow restriction mechanism forms a high impedance zone in the vacuum platen, the high impedance zone comprising a subset of the platen holes. The airflow impedance through the high impedance zone is relatively high compared to the airflow impedance through another subset of the platen holes, which are part of a low impedance zone. The high impedance zone may be located near the printhead to reduce airflow through uncovered platen holes near the printhead.

公开(公告)号：US20230234356A1

公开(公告)日：2023-07-27

申请号：US17648609

申请日：2022-01-21

Applicant: Xerox Corporation

Inventor： Varun Sambhy ,  Jason M. LeFevre ,  Seemit Praharaj ,  Chu-Heng Liu ,  Douglas K. Herrmann ,  Linn C. Hoover

IPC: B41J2/165 ,  B41J2/14 ,  B41J29/377

CPC classification number: B41J2/165 ,  B41J2/14153 ,  B41J29/377 ,  B41J2002/16502

Abstract: An inkjet printer includes solvent vapor generators that direct two flows of solvent vapor on each side of each printhead in the process direction toward media passing the printheads in the printer. The solvent vapor attenuates the evaporation of ink solvent from ink drops on the nozzle plates or from the ink in the nozzles of the printheads. Thus, the ink on the nozzle plates and in the nozzles does not dry out and the operational status of the inkjets is preserved.

公开(公告)号：US20230150264A1

公开(公告)日：2023-05-18

申请号：US17455231

申请日：2021-11-17

Applicant: Xerox Corporation

Inventor： Varun Sambhy ,  Seemit Praharaj ,  Douglas K. Herrmann ,  Jason M. LeFevre ,  Chu-Heng Liu ,  Linn C. Hoover

IPC: B41J2/165 ,  B41J2/175

CPC classification number: B41J2/165 ,  B41J2/17503 ,  B41J2002/16502

Abstract: A method of operating a printer supplies an ink solvent or mixture of ink solvents to porous members positioned adjacent printheads. The ink solvent or solvent mixture evaporates from the porous members to provide a solvent vapor environment in the vicinity of the nozzle plates of the printheads. The solvent vapor environment attenuates the evaporation of ink solvent from ink drops on the nozzle plates or from the ink in the nozzles of the printheads. Thus, the ink on the nozzle plates and in the nozzles does not dry out and the operational status of the inkjets is preserved.

公开(公告)号：US11639067B2

公开(公告)日：2023-05-02

申请号：US16679220

申请日：2019-11-10

Applicant: Xerox Corporation

Inventor： Jason M. Lefevre ,  Seemit Praharaj ,  Michael J. Levy ,  Douglas K. Herrmann ,  Paul McConville ,  Chu-Heng Liu ,  Linn C. Hoover ,  David A. VanKouwenberg

IPC: B41J11/00 ,  B41J2/155 ,  B65H5/22 ,  B41J13/08

Abstract: A marker transport system and a method of operating the marker transport system. A group of print bars is located with respect to a marker transport platen and a marker transport belt. A vacuum source and a pneumatic solenoid block are associated with the marker transport platen. The marker transport platen includes airflow sections divided into process-direction slots and cross-section direction slots. The cross-section direction slots are located beneath the print bars and are connected to the vacuum source via the pneumatic solenoid block, which facilitates an individual control of each of the cross-process direction slots. Pneumatic valves are associated with the pneumatic solenoid block, which supplies a flow of vacuum to the cross-process direction vacuum slots. The pneumatic vales can be timed to allow the vacuum to be present when a sheet is present over a corresponding vacuum slot among the process-direction slots and the cross-section direction slots.

公开(公告)号：US20220402060A1

公开(公告)日：2022-12-22

申请号：US17353555

申请日：2021-06-21

Applicant: Xerox Corporation

Inventor： Chu-Heng Liu ,  Paul J. McConville ,  Jason M. LeFevre ,  Douglas K. Herrmann ,  Seemit Praharaj

IPC: B23K9/04 ,  B23K9/32 ,  B23K9/16 ,  B23K35/38 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/10 ,  B33Y50/02

Abstract: A three-dimensional (3D) metal object manufacturing apparatus is configured to increase the oxidation of ejected melted metal drops for the formation of metal support structures during manufacture of a metal object with the apparatus. The oxidation can be increased by either increasing a distance between the ejector head and a platform supporting the metal object or by providing an air flow transverse to the direction of movement of the melted metal drops, or both.