公开(公告)号：US20220247888A1

公开(公告)日：2022-08-04

申请号：US17166607

申请日：2021-02-03

Applicant: Xerox Corporation

Inventor： Stuart A. Schweid ,  John T. Newell ,  Chu-Heng Liu ,  Roger L. Triplett ,  Mojgan Rabbani ,  Martin S. Maltz ,  David A. VanKouwenberg ,  Seemit Praharaj ,  Douglas R. Taylor ,  Martin L. Frachioni ,  Paul J. McConville

IPC: H04N1/60 ,  B41J2/01

Abstract: A system and method enable determining a total colorant limit for printing images. The system includes memory which stores instructions for: determining a grain value for each of a set of printed patches printed on a first print media, the grain value being based upon a visual contrast sensitivity function computed for the respective patch, the set of printed patches including patches printed on the print media at different total colorant values; determining a total colorant limit for the first print media, as a function of the total colorant values and corresponding grain values for the printed patches in the set, wherein the total colorant limit is a total colorant value which corresponds to a grain value which does not exceed a threshold grain value for the first print media. A processor executes the instructions.

公开(公告)号：US11318760B2

公开(公告)日：2022-05-03

申请号：US16724437

申请日：2019-12-23

Applicant: Xerox Corporation

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

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 heater, a media transport belt cooler, and a media transport belt. The media transport belt is configured to move substrates past the heater after ink images have been formed on the substrates and the media transport belt cooler is positioned to remove heat energy from the media transport belt after the media transport belt has passed the heater and the substrates have separated from the media transport belt. The substrate cooler is configured to reduce a temperature of the media transport belt to a temperature that attenuates image defects arising from temperature differentials in the media transport belt when the media transport belt is opposite the heater.

公开(公告)号：US11117764B2

公开(公告)日：2021-09-14

申请号：US16679215

申请日：2019-11-10

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: B41J11/00 ,  B65H5/22

Abstract: A vacuum roller system and a method of operating the vacuum roller system can include a group of vacuum rollers operable to move a sheet of media through a dryer. The vacuum rollers do not require a vacuum to be drawn between the vacuum rollers. Each vacuum roller can include a plenum operable to direct the vacuum to a top portion of the vacuum roller to drive the sheet of media from one roller to the next roller. The plenum can engage vacuum holes in a rotating vacuum roller when the vacuum holes in the vacuum roller are aligned with the plenum.

公开(公告)号：US20210187953A1

公开(公告)日：2021-06-24

申请号：US16719327

申请日：2019-12-18

Applicant: Xerox Corporation

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

IPC: B41J2/17 ,  B41J2/045 ,  B41J2/165

Abstract: An environmental conditioner in an aqueous inkjet printer conditions the print zone in the printer so aqueous ink at the nozzles of the printheads maintains its low viscosity state and does not dry. The environmental conditioner includes a humidifying chamber having a reservoir configured to contain a volume of water, a heater configured to heat the water in the water reservoir to a predetermined temperature range, an air inlet to move air into the humidifying chamber, an air discharge configured to remove humidified air from the humidifying chamber and direct the humidified air into a space between a faceplate of a printhead and a path for media passing by the faceplate of the printhead. The chamber can include an ultrasonic atomizer to produce a moisturized mist for absorption by the heated air or wicking material to transfer moisture to the air.

公开(公告)号：US20210187948A1

公开(公告)日：2021-06-24

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 ,  B41J2/165 ,  B41J29/393

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：US10946682B2

公开(公告)日：2021-03-16

申请号：US15924714

申请日：2018-03-19

Applicant: Xerox Corporation

Inventor： Linn C. Hoover ,  Erwin Ruiz ,  David A. VanKouwenberg ,  Paul M. Fromm ,  Jeffrey J. Bradway

IPC: B41M3/00 ,  B05D5/06 ,  B05D7/00 ,  B41M7/00 ,  G09F3/00 ,  B31D1/02 ,  G06Q30/06

Abstract: A printer system includes a memory, a processor, and one or more printer heads. The processor determines a number of transmission layers and a number of barrier layers to use in a color changing expiration indicator based at least in part on a time period between a print date of the indicator and a received expiration date. The printer heads print a reactive layer onto print media, where at least a portion of the reactive layer is configured to migrate through the transmission layers. The printer heads also print the determined number of transmission layers and the determined number of barrier layers in alternation. The printer heads print a reactant layer that is configured to change color responsive to a reaction between the reactant layer and the reactive layer upon migration of the reactive layer through the transmission layers. The reaction is configured to occur on the received expiration date.

公开(公告)号：US20200254762A1

公开(公告)日：2020-08-13

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

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：US10696052B1

公开(公告)日：2020-06-30

申请号：US16272057

申请日：2019-02-11

Applicant: Xerox Corporation

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

IPC: B41J2/165 ,  B41J29/38 ,  B41J2/19 ,  B41J2/17

Abstract: A cap is positioned to contact a printhead when the printhead is not ejecting liquid ink onto print media. A dispenser dispenses an ink stabilizing material into the cap. A blocking structure is positioned in the cap to contact vent openings of the inkjet printhead when the inkjet printhead is in the cap and is in a location to submerge the nozzles in the ink stabilizing material in the cap. An ink control device draws the ink stabilizing material into nozzles of the inkjet printhead when the vent openings are blocked by the blocking structure. The ink control device subsequently draws the ink stabilizing material into the vent openings when the vent openings are separated from the blocking structure.

公开(公告)号：US20150336394A1

公开(公告)日：2015-11-26

申请号：US14814218

申请日：2015-07-30

Applicant: Xerox Corporation

Inventor： Jason M. LeFevre ,  Paul J. McConville ,  Santokh S. Badesha ,  James M. Chappell ,  David A. VanKouwenberg ,  Anthony S. Condello ,  Daniel J. McVeigh

IPC: B41J2/21 ,  B41J2/14

CPC classification number: B41J2/21 ,  B41J2/14 ,  B41J2/2107 ,  B41J2/2114 ,  C10M105/76 ,  C10M107/50 ,  C10M2229/0415 ,  C10M2229/0525 ,  C10N2230/06 ,  C10N2240/06

Abstract: A functional amine release agent displaying reduced coefficient of friction as compared to standard silicone oils, the release agent comprising a polydimethylsiloxane oil and a functional amine selected from the group consisting of pendant propylamines and pendant N-(2-aminoethyl)-3-aminopropyl; wherein the concentration of functional amine to polydimethylsiloxane oil is approximately less than 0.0006 meq/g. According to certain embodiments, the functional amine release agent is operable to impart a coefficient of friction of about 0.3 or more to the print media, resulting in improved finishing and converting equipment interaction.

Abstract translation: 与标准硅油相比显示降低的摩擦系数的功能性胺释放剂，所述脱模剂包含聚二甲基硅氧烷油和选自侧基丙胺和N-（2-氨基乙基）-3-氨基丙基侧基的官能胺; 其中官能胺对聚二甲基硅油的浓度约为0.0006meq / g。 根据某些实施方案，官能胺脱模剂可操作以赋予印刷介质约0.3或更大的摩擦系数，从而改进整理和转化设备相互作用。

公开(公告)号：US11919323B2

公开(公告)日：2024-03-05

申请号：US17190520

申请日：2021-03-03

Applicant: Xerox Corporation

Inventor： Linn C. Hoover ,  Erwin Ruiz ,  David A. VanKouwenberg ,  Paul M. Fromm ,  Jeffrey J. Bradway

IPC: B41M3/00 ,  B05D5/06 ,  B05D7/00 ,  B31D1/02 ,  B41M7/00 ,  G06Q30/06 ,  G09F3/00

CPC classification number: B41M3/005 ,  B05D5/06 ,  B05D7/587 ,  B31D1/027 ,  B41M3/001 ,  B41M7/0081 ,  B41M7/009 ,  G06Q30/06 ,  G09F3/0291 ,  B41M2205/40

Abstract: A color changing expiration indicator includes a reactive layer and a first barrier layer that covers at least a portion of the reactive layer. The color changing expiration indicator also includes a transmission layer that covers at least a portion of the first barrier layer, and a second barrier layer that covers at least a portion of the transmission layer. The color changing expiration indicator further includes a reactant layer that covers at least a portion of the second barrier layer. The reactant layer changes color responsive to a reaction that occurs between the reactant layer and the reactive layer.