公开(公告)号：US20230241670A1

公开(公告)日：2023-08-03

申请号：US18298847

申请日：2023-04-11

申请人： XEROX CORPORATION

发明人： Joseph C. SHEFLIN ,  Jason M. LeFEVRE

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

CPC分类号： B22D46/00 ,  B33Y50/02 ,  B33Y10/00 ,  B22D23/003

摘要： 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.

公开(公告)号：US20220314653A1

公开(公告)日：2022-10-06

申请号：US17218887

申请日：2021-03-31

申请人： XEROX CORPORATION

发明人： Chu-Heng LIU ,  Douglas K. HERRMANN ,  Jason M. LeFEVRE ,  Paul J. McCONVILLE ,  Seemit PRAHARAJ

IPC分类号： B41J11/00

摘要： 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：US20220314650A1

公开(公告)日：2022-10-06

申请号：US17217466

申请日：2021-03-30

申请人： XEROX CORPORATION

发明人： Seemit PRAHARAJ ,  Douglas K. HERRMANN ,  Jason M. LeFEVRE ,  Chu-Heng LIU ,  Paul J. McCONVILLE

IPC分类号： B41J11/00

摘要： A printing system comprises a printhead to eject ink through an opening in a carrier plate to a deposition region. A print medium is held against a movable support surface by vacuum suction communicated through platen holes of a vacuum platen and transported through the deposition region. An airflow control system comprises upstream and downstream valves associated with the printhead, individually addressable channels for the vacuum platen, or both. The upstream and downstream valves are arranged to selectively block and allow airflow through an upstream side or a downstream side, respectively, of the opening in the carrier plate. Actuation of the upstream and downstream valves may be controlled based on a location of the print medium. The channels are arranged to selectively control the supply of vacuum suction to respectively corresponding columns of platen holes. Actuation of the channels may be controlled based on a size of the print medium.

公开(公告)号：US20220305817A1

公开(公告)日：2022-09-29

申请号：US17216232

申请日：2021-03-29

申请人： XEROX CORPORATION

发明人： Douglas K. HERRMANN ,  Jason M. LeFEVRE ,  Chu-Heng LIU ,  Paul J. McCONVILLE ,  Seemit PRAHARAJ

IPC分类号： B41J11/00

摘要： A printing system comprises a print fluid deposition assembly, a media transport device, and an air flow control system. The print fluid deposition assembly comprises a printhead to eject a print fluid through an opening of a carrier plate to a deposition region. The media transport device holds a print medium against the movable support surface by vacuum suction and transports the print medium through the deposition region. The air flow control system comprises an air supply unit to selectively flow air through the opening based on a location of a print medium relative to the printhead. The air supply unit comprises an air guide structure comprising an air outlet portion extending into the opening of the carrier plate between the printhead and the carrier plate, the air outlet portion terminating in an end wall that is angled obliquely relative to the movable support surface towards a reverse-process direction.

公开(公告)号：US20170100943A1

公开(公告)日：2017-04-13

申请号：US14877924

申请日：2015-10-07

申请人： XEROX Corporation

发明人： Steven R. MOORE ,  Paul J. McCONVILLE ,  Peter Michael GULVIN ,  Jason M. LeFEVRE ,  David A. VanKOUWENBERG ,  Andrew W. HAYS

IPC分类号： B41J11/00 ,  D21H23/30 ,  D21H19/14

CPC分类号： B41J11/0015 ,  D21H19/14 ,  D21H23/30

摘要： A system and method are provided for controlling archival sheet curl formation in image receiving media substrates on which images are formed using aqueous inks as the marking material. Archival curl occurs over time and is based on a partial coverage of the image receiving media substrates by the deposited water-based marking materials. A unique post-processing scheme applies selective aqueous clear fluid onto imaged substrates (cut sheets) to substantially counteract long-term archival curl formation in the individual image receiving media substrates. Both opposing sides of the cut sheet are processed in a manner that causes them to substantially equally undergo the generally irreversible shrinkage phenomenon that leads to archival curl, thus substantially canceling out the archival curl formation mechanism. A clear fluid is applied image-wise to portions of one or both sides of the image receiving media substrates to counterbalance the formed aqueous ink image.

公开(公告)号：US20240173769A1

公开(公告)日：2024-05-30

申请号：US18059638

申请日：2022-11-29

申请人： XEROX CORPORATION

发明人： Douglas K. HERRMANN ,  Jason M. LeFEVRE ,  Seemit PRAHARAJ ,  Varun SAMBHY

IPC分类号： B22D23/00 ,  B22D46/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

CPC分类号： B22D23/003 ,  B22D46/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

摘要： A system and method of characterizing drops of printing material in a 3D printer is disclosed, which includes ejecting a drop from a nozzle of an ejector in the 3D printer, intersecting the drop with a beam while the drop is in-flight, and determining one or more physical characteristics of the drop. The system and method may include where the drop intersects the beam between the nozzle and a substrate of the 3D printer or the drop intersects the beam between the nozzle and a top surface of a part printed by the 3D printer. The beam is located between an emitter and a detector are each positioned external to one or more side walls of a 3D printer. A physical characteristic of the drop may include drop size, drop shape, or drop mass and comparison with a reference.

公开(公告)号：US20220305819A1

公开(公告)日：2022-09-29

申请号：US17216261

申请日：2021-03-29

申请人： XEROX CORPORATION

发明人： Patrick Jun HOWE ,  John Patrick BAKER ,  Brian M. BALTHASAR ,  Glenn BATCHELOR ,  Anthony Salvatore CONDELLO ,  Ali R. DERGHAM ,  Timothy P. FOLEY ,  Douglas K. HERRMANN ,  Richard A. KALB ,  Peter John KNAUSDORF ,  Jason M. LeFEVRE ,  Jack T. LESTRANGE ,  Chu-Heng LIU ,  Paul J. McCONVILLE ,  Seemit PRAHARAJ ,  Palghat S. RAMESH ,  Joseph C. SHEFLIN ,  Emmett James SPENCE ,  Robert Jian ZHANG ,  Megan ZIELENSKI

IPC分类号： B41J11/00 ,  B41J2/01

摘要： A printing system comprises a print fluid deposition assembly, a media transport device, and an air flow control system. The print fluid deposition assembly comprises a carrier plate and a printhead arranged to eject a print fluid through an opening of the carrier plate to a deposition region. The media transport device holds a print medium against the movable support surface by vacuum suction and transports the print medium through the deposition region. The air flow control system comprises an air supply unit comprising air flow guide structure extending into the opening of the carrier plate between the carrier plate and the printhead to flow air through the opening. The air flow control system controls the air supply unit to selectively flow the air based on a location of a print medium relative to the printhead.

公开(公告)号：US20220305815A1

公开(公告)日：2022-09-29

申请号：US17216175

申请日：2021-03-29

申请人： XEROX CORPORATION

发明人： Douglas K. HERRMANN ,  Linn C. HOOVER ,  Patrick Jun HOWE ,  Joseph C. SHEFLIN ,  Robert Jian ZHANG ,  John Patrick BAKER ,  Brian M. BALTHASAR ,  Glenn BATCHELOR ,  Anthony Salvatore CONDELLO ,  Ali R. DERGHAM ,  Timothy P. FOLEY ,  Richard A. KALB ,  Peter John KNAUSDORF ,  Jason M. LeFEVRE ,  Jack T. LESTRANGE ,  Chu-Heng LIU ,  Paul J. McCONVILLE ,  Seemit PRAHARAJ ,  Palghat S. RAMESH ,  Erwin RUIZ ,  Emmett James SPENCE ,  Rachel Lynn TANCHAK ,  Kareem TAWIL ,  Carlos M. TERRERO ,  Megan ZIELENSKI

IPC分类号： B41J11/00

摘要： A printing system comprises a print fluid deposition assembly, a media transport device, and an air flow control system. The print fluid deposition assembly comprises a carrier plate and a printhead arranged to eject a print fluid through an opening of the carrier plate to a deposition region. The media transport device comprises a movable support surface to transport a print medium along a process direction through the deposition region, the media transport device holding the print medium against the movable support surface by vacuum suction. The air flow control system is arranged to selectively flow air through the opening of the carrier plate between the carrier plate and the printhead based on a location of a print medium transported by the media transport device relative to the printhead.

公开(公告)号：US20220314654A1

公开(公告)日：2022-10-06

申请号：US17218900

申请日：2021-03-31

申请人： XEROX CORPORATION

发明人： Chu-Heng LIU ,  Douglas K. HERRMANN ,  Jason M. LeFEVRE ,  Paul J. McCONVILLE ,  Seemit PRAHARAJ

IPC分类号： B41J11/00

摘要： A printing system comprises a printhead to eject a print fluid to a deposition region. A movable support surface, such as a belt, is used to transport print media through the deposition region, with the print media being held against the movable support surface by vacuum suction through holes in the movable support surface. A media registration device loads print media onto the movable support surface and registers the print media to a location of the movable support surface. The movable support surface comprises no-suction-regions in which the vacuum suction through the movable support surface is prevented. The no-suction regions extend across the width of the movable support surface in a cross-process direction and are arranged at predetermined intervals along the process direction. The control system causes the media registration device to register each of the print media relative to a respective one of the no-suction-regions.

公开(公告)号：US20220314652A1

公开(公告)日：2022-10-06

申请号：US17218873

申请日：2021-03-31

申请人： XEROX CORPORATION

发明人： Douglas K. HERRMANN ,  Jason M. LeFEVRE ,  Chu-Heng LIU ,  Paul J. McCONVILLE ,  Seemit PRAHARAJ

IPC分类号： B41J11/00

摘要： A printing system comprises a printhead to eject a print fluid to a deposition region. Print media are held by vacuum suction against a movable support surface, which moves over a vacuum platen to transport the print media through the deposition region. The vacuum platen has platen holes through which the vacuum suction is communicated. Multiple vacuum plenums are provided to supply the vacuum suction to different groups of the platen hoes. A first vacuum plenum is fluidically coupled to a first group of the platen holes located at least partially in the deposition region, and to a second group of platen holes located upstream of the first group. A second vacuum plenum is fluidically coupled to a third group of the platen holes comprising at least some platen holes located between the first and second groups of platen holes.