公开(公告)号：US11325799B2

公开(公告)日：2022-05-10

申请号：US16570577

申请日：2019-09-13

Applicant: Xerox Corporation

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

IPC: B65H5/22 ,  B65H5/06

Abstract: A vacuum roller system and a method of operation the vacuum roller system can include an assembly of interdigitated rollers, and a vacuum system, wherein the assembly of interdigitated rollers is operably connected to the vacuum system to move sheets of media through a downstream dryer in a printer, wherein a vacuum is drawn between individual rollers among the assembly of interdigitated rollers so that the vacuum is distributed across a sheet of media and is split around the individual rollers. The spacing between the individual rollers among the assembly of interdigitated rollers is variable to vary the vacuum.

公开(公告)号：US11243121B2

公开(公告)日：2022-02-08

申请号：US16228340

申请日：2018-12-20

Applicant: Xerox Corporation

Inventor： Seemit Praharaj ,  Michael J. Levy ,  Paul J. McConville

IPC: B32B27/20 ,  G01K11/12 ,  B32B3/12 ,  B32B27/08 ,  G01K3/00 ,  G01L11/02

Abstract: An indicator tag and a method for fabricating the same are disclosed. For example, the indicator tag includes a three-dimensional mesh comprising a plurality of pores, wherein the three-dimensional mesh is printed with a water soluble and ultra-violet (UV) light curable ink, a container enclosing the three-dimensional mesh, a membrane coupled to the three-dimensional mesh, and a dye dispensed on top of the membrane, wherein the three-dimensional mesh interacts with the dye when in contact with the dye to provide an indication.

公开(公告)号：US20210387459A1

公开(公告)日：2021-12-16

申请号：US16897941

申请日：2020-06-10

Applicant: Xerox Corporation

Inventor： Seemit Praharaj ,  Paul J. McConville ,  Jason M. LeFevre ,  Michael J. Levy ,  Thomas J. Wyble

IPC: B41J2/175 ,  B41J2/165

Abstract: A purge cycle is performed with an ink delivery system of an inkjet printer by applying a pressure pulse to a printhead in the printer that is substantially shorter than pressure pulses previously used. A pressure at a predetermined threshold is generated behind a valve and then release to the printhead. The duration of the pressure application is in a range of about 150 milliseconds to about 250 milliseconds. This pressure pulse substantially reduces the amount of ink emitted during the purge. A bidirectional wipe of the printhead face is effective for restoring inkjets in the printhead even though the amount of emitted ink is substantially reduced.

公开(公告)号：US11161355B1

公开(公告)日：2021-11-02

申请号：US16923802

申请日：2020-07-08

Applicant: Xerox Corporation

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

IPC: B41J11/00

Abstract: An inkjet printer includes a dryer configured to attenuate the effects of temperature differentials arising in substrates that are caused by holes in a media transport belt and a platen covering a vacuum plenum. The dryer includes a platen, a heater configured to direct heat toward the platen, at least one media transport belt configured to slide over the platen to move the substrates past the heater after the ink images have been formed on the substrates, and at least one belt diversion component configured to divert the at least one media belt from a straight-line path over the platen.

公开(公告)号：US11059289B1

公开(公告)日：2021-07-13

申请号：US16724459

申请日：2019-12-23

Applicant: Xerox Corporation

Inventor： Seemit Praharaj ,  Douglas K. Herrmann ,  Paul J. McConville ,  Jason M. LeFevre ,  Chu-heng Liu ,  David A. VanKouwenberg ,  Michael J. Levy ,  Linn C. Hoover ,  Thomas J. Wyble ,  John P. Meyers

IPC: B41J2/125 ,  B41J29/393 ,  B41J2/165

Abstract: A directionality detector is configured for use in an inkjet printer to attenuate the effects of ink drying in the nozzles of a printhead during printing operations. The directionality detector includes an optical sensor that generates image data of a test pattern formed on media by the printer, a diffuser that emits humidified air toward the media before the media is printed, and a controller operatively connected to the optical sensor and diffuser. The controller is configured compare the image data of the test pattern to stored image data of the test pattern printed at a previous time and determine whether any difference between the two images is greater than a predetermined threshold. The controller then operates the diffuser to direct humidified air toward the media passing the diffuser using the differences between the stored image data of the test pattern and the image data of the test pattern.

公开(公告)号：US20210138803A1

公开(公告)日：2021-05-13

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 ,  B65H5/22

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：US10821731B2

公开(公告)日：2020-11-03

申请号：US16272086

申请日：2019-02-11

Applicant: Xerox Corporation

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

IPC: B41J2/165 ,  B41J2/21

Abstract: A cap is positioned to contact a printhead when the printhead is not ejecting liquid ink. The cap and the printhead create a sealed space adjacent printhead nozzles when contacting each other. A heated evaporator is connected to the cap and is adapted to evaporate an ink-compatible liquid to form a water and/or solvent vapor and supply the water and/or solvent vapor to the sealed space to protect the liquid ink in the nozzles. An insulator thermally insulates the heated evaporator from the printhead. This prevents the ink in the nozzles from drying and prevents the nozzles from clogging.

公开(公告)号：US10814631B2

公开(公告)日：2020-10-27

申请号：US16272094

申请日：2019-02-11

Applicant: Xerox Corporation

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

IPC: B41J2/165

Abstract: Ink stabilizing material is applied to rotatable panels within a cap of an inkjet cartridge resting structure. The rotatable panels then rotate to contact an inkjet printhead when the printhead contacts the cap. Continuous periodic flushing of the printhead is performed while the rotatable panels are contacting the printhead by periodically and repeatedly alternating between ejecting a mixture of the ink stabilizing material and ink from the nozzles, and drawing the mixture of the ink stabilizing material and the ink back into the nozzles.

公开(公告)号：US10800174B2

公开(公告)日：2020-10-13

申请号：US16272074

申请日：2019-02-11

Applicant: Xerox Corporation

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

IPC: B41J2/165 ,  B41J2/21 ,  B41J2/01

Abstract: A cap is positioned to contact a printhead when the printhead is not ejecting liquid ink. The cap and the printhead create a sealed space adjacent printhead nozzles when contacting each other. An evaporator is connected to the cap and is adapted to control evaporation a water-incompatible or solvent-incompatible liquid into the sealed space to condense an ink-blocking film on the surface of the liquid ink in the nozzles to protect the liquid ink in the nozzles. This prevents the ink in the nozzles from drying and prevents the nozzles from clogging.

公开(公告)号：US10710370B2

公开(公告)日：2020-07-14

申请号：US16223553

申请日：2018-12-18

Applicant: Xerox Corporation

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

IPC: B41J2/165 ,  B41J2/175

Abstract: An inkjet printer is configured with capping stations for storing printheads in the printer during periods of printer inactivity so the viscosity of the ink in the nozzles of the inkjets of the printheads does not increase significantly. Each capping station has a printhead receptacle that encloses a volume, a planar member configured to move between a first position at which the planar member is located within the printhead receptacle and a second position at which the planar member is external of the printhead receptacle, a first actuator operatively connected to the planar member, the first actuator being configured to move the planar member from the first position to the second position, and a controller configured to operate the first actuator to move the planar member from the first position to the second position to mate the planar member with a face of a printhead.