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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.
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12.发明申请公开(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
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.
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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
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.
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公开(公告)号：US20140146329A1
公开(公告)日：2014-05-29
申请号：US13689283
申请日：2012-11-29
Applicant: XEROX CORPORATION
Inventor： Howard A. Mizes , Michael C. Mongeon , Michael J. Severn , Joseph C. Sheflin , Michael J. Levy
IPC: G06K15/02
CPC classification number: G06K15/02 , B41J11/008 , B41J15/04 , G06K15/022
Abstract: A method for printing on a continuous print medium having a plurality of pages includes identifying a location of a feature in image data that are generated from a portion of a first page in the print medium. The method includes modifying a time of operation of a marking unit to form an image on each page in the plurality of pages at a predetermined distance from the edge of each page with reference to the location of the identified feature in the image data. In one configuration, the method enables precise placement of printed images over preprinted forms.
Abstract translation: 一种用于在具有多个页面的连续打印介质上进行打印的方法包括识别从打印介质中的第一页的一部分生成的图像数据中的特征的位置。 该方法包括修改标记单元的操作时间，以参考图像数据中所识别的特征的位置，在距每个页边缘预定距离的多个页面中的每页上形成图像。 在一种配置中，该方法能够在预印形式上精确地放置打印图像。
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公开(公告)号：US11383525B2
公开(公告)日：2022-07-12
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
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.
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Patent Agency Ranking
公开(公告)号：US11110709B2
公开(公告)日：2021-09-07
申请号：US16780419
申请日：2020-02-03
Applicant: XEROX CORPORATION
Inventor： Michael J. Levy , Seemit Praharaj , Jason M. LeFevre , Linn C. Hoover , Paul J. McConville , Chu-heng Liu , Douglas K. Herrmann , David A. Vankouwenberg
IPC: B41J2/165
Abstract: A system for cleaning and treating a printhead includes (a) a movable carriage having affixed to a base of the movable carriage a cleaning blade and an absorptive pad, (b) a low vapor pressure organic solvent, the low vapor pressure organic solvent is deliverable to the absorptive pad via a pump, the low vapor pressure organic solvent has a vapor pressure lower than water and (c) a carriage moving mechanism that moves the carriage so that the cleaning blade and the absorptive pad pass over the printhead.
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公开(公告)号：US11077679B2
公开(公告)日：2021-08-03
申请号：US16703656
申请日：2019-12-04
Applicant: Xerox Corporation
Inventor： David A. VanKouwenberg , Seemit Praharaj , Michael J. Levy , Douglas K. Herrmann , Paul McConville , Chu-Heng Liu , Linn C. Hoover , Jason M. Lefevre
Abstract: A marker transport system and a method of operating the marker transport system can include one or more print heads and a marker transport platen upon which a sheet of media moves. The transport platen can include airflow sections comprising process-direction slots. The plates can move in a cross-process direction, and can control airflow in an area under the print heads. The one or more plates in a first position can allow for airflow when the sheet of media is located at the first position and in a second position can block the airflow at the second position. A vacuum can be provided under the sheet of media as the sheet of media traverses a print path across the marker transport platen. A no-vacuum inter-document zone can be provided, which moves along with the sheet of media under the one or more print heads.
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公开(公告)号：US20210187968A1
公开(公告)日：2021-06-24
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.
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公开(公告)号：US20210170766A1
公开(公告)日：2021-06-10
申请号：US16703656
申请日：2019-12-04
Applicant: Xerox Corporation
Inventor： David A. VanKouwenberg , Seemit Praharaj , Michael J. Levy , Douglas K. Herrmann , Paul McConville , Chu-Heng Liu , Linn C. Hoover , Jason M. Lefevre
Abstract: A marker transport system and a method of operating the marker transport system can include one or more print heads and a marker transport platen upon which a sheet of media moves. The transport platen can include airflow sections comprising process-direction slots. The plates can move in a cross-process direction, and can control airflow in an area under the print heads. The one or more plates in a first position can allow for airflow when the sheet of media is located at the first position and in a second position can block the airflow at the second position. A vacuum can be provided under the sheet of media as the sheet of media traverses a print path across the marker transport platen. A no-vacuum inter-document zone can be provided, which moves along with the sheet of media under the one or more print heads.
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公开(公告)号：US20210078814A1
公开(公告)日：2021-03-18
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
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.
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