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31.发明公开公开(公告)号：US20230226614A1
公开(公告)日：2023-07-20
申请号：US17648490
申请日：2022-01-20
Applicant: Xerox Corporation
Inventor： Viktor Sukhotskiy , Joseph C. Sheflin , Brian M. Balthasar , Peter Knausdorf , Chu-Heng Liu
Abstract: A three-dimensional (3D) metal object manufacturing apparatus is equipped with an orifice cleaning system that removes metal drops that have adhered to a plate, an orifice in the plate, and a nozzle ejecting melted metal drops through the orifice during object forming operations. The orifice cleaning system includes an orifice cleaning tool that consists essentially of a soft carbon material, such as graphite. The orifice cleaning tool is configured with a handle that is gripped by an articulated arm to move the orifice cleaning tool against the plate, the orifice, and a portion of the nozzle at the orifice.
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公开(公告)号：US11667136B2
公开(公告)日：2023-06-06
申请号：US17218873
申请日：2021-03-31
Applicant: XEROX CORPORATION
Inventor： Douglas K. Herrmann , Jason M. LeFevre , Chu-Heng Liu , Paul J. McConville , Seemit Praharaj
IPC: B41J11/00
CPC classification number: B41J11/0085 , B41J11/007
Abstract: 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 holes. 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.
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公开(公告)号：US11648784B2
公开(公告)日：2023-05-16
申请号：US17216232
申请日：2021-03-29
Applicant: XEROX CORPORATION
Inventor： Douglas K. Herrmann , Jason M. LeFevre , Chu-Heng Liu , Paul J. McConville , Seemit Praharaj
CPC classification number: B41J11/0085
Abstract: 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.
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公开(公告)号：US11613116B1
公开(公告)日：2023-03-28
申请号：US17491833
申请日：2021-10-01
Applicant: Xerox Corporation
Inventor： Jason M. LeFevre , Douglas K. Herrmann , Chu-Heng Liu , Varun Sambhy , Seemit Praharaj
IPC: B41J29/393 , B41J2/045 , G06K15/10 , G06K15/16 , G06K15/02
Abstract: A method of operating a printer distributes inkjet operations from frequently used inkjets to lesser used inkjets. The redistribution of the inkjet operations helps reduce the number of inkjets exhibiting cross-process direction error so printhead maintenance operations, such as purging, occur less frequently.
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公开(公告)号：US20220126371A1
公开(公告)日：2022-04-28
申请号：US17451501
申请日：2021-10-20
Applicant: Xerox Corporation
Inventor： Chu-Heng Liu
Abstract: A metal object produced by a three-dimensional (3D) metal object manufacturing apparatus is subjected to a high temperature heat treatment to improve bonding of the object layers, especially in the vertical or Z-axis direction. A supporting structure is formed around the metal object to retain the shape and features of the object during the high temperature heat treatment. The supporting structure is formed in a manner that is sufficient to retain the shape of the metal object during the heat treatment but is easily removed once the heat treatment is finished.
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Patent Agency Ranking
公开(公告)号：US20210069778A1
公开(公告)日：2021-03-11
申请号：US17017447
申请日：2020-09-10
Applicant: XEROX CORPORATION
Inventor： Gary D. Redding , Lyle G. Dingman , Mark A. Cellura , Peter M. Gulvin , Christopher T. Chungbin , Chu-Heng Liu
Abstract: Nozzles for additive manufacturing and methods for improving wettability of the nozzles are disclosed. The nozzle may include a body having an inner surface and an outer surface. The inner surface may define an inner volume of the nozzle, and may have a water contact angle of greater than 1° and less than about 90°. The method may include subjecting the nozzle to a surface treatment. The surface treatment may include plasma treating a surface of the nozzle such that free radicals, polar functional groups, or a combination thereof are formed at the surface of the nozzle.
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公开(公告)号：US10899155B2
公开(公告)日：2021-01-26
申请号：US15873056
申请日：2018-01-17
Applicant: Xerox Corporation
Inventor： Douglas K. Herrmann , Seemit Praharaj , Jason M. LeFevre , Paul J. McConville , Chu-Heng Liu
IPC: C09D133/08 , B31D1/02 , B41M7/00 , B41M5/00 , B41J2/01 , C09D133/14 , C09D11/101 , B05D3/06 , B41M3/00 , C09J7/30
Abstract: An adhesive sign suited to use in retail applications includes a substrate layer. An adhesive layer is disposed on the substrate layer. The adhesive layer defines an exposed region for attachment to an associated structure. The adhesive layer is derived from a photo-curable inkjet composition. An ink layer is disposed on the substrate layer. The ink layer includes an image. The ink layer is derived from a photo-curable inkjet composition. The adhesive layer and ink layer can be formed in the same inkjet printing process and cured in a common photo-curing station. A stack of the adhesive signs can be assembled without interleaving a release liner between each pair of signs.
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公开(公告)号：US10882338B2
公开(公告)日：2021-01-05
申请号：US16710116
申请日：2019-12-11
Applicant: Xerox Corporation
Inventor： Seemit Praharaj , Douglas K. Herrmann , Jason M. LeFevre , Chu-Heng Liu , Paul J. McConville
Abstract: A dryer for use in an aqueous ink printer adequately dries coated substrates printed with aqueous ink images before discharge of the substrates. The dryer has a housing, a plurality of laser diodes, a current source, a variable electrical resistance network having a plurality of resistors, and a controller. The controller is configured to identify a plurality of ink coverage densities for a plurality of areas in an ink image that passes through the dryer, select and vary an electrical resistance of one or more of the resistors in the variable electrical resistance network using the identified ink coverage densities, and operate the plurality of resistors in the variable electrical resistance network to connect the laser diodes in the dryer selectively to the current source through the plurality of resistors using the identified ink coverage densities and a speed of the substrate through the dryer.
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公开(公告)号：US10703092B1
公开(公告)日：2020-07-07
申请号：US16266536
申请日：2019-02-04
Applicant: Xerox Corporation
Inventor： Chu-Heng Liu , Jason Lefevre , Seemit Praharaj , Paul McConville , Douglas Herrmann
Abstract: A self-advancing cleaner and a method of operating the self-advancing cleaner. In an embodiment, a rotatable member can engage a transport belt, wherein the rotatable member includes a cleaning surface comprising a surface sufficiently rough to collect and take away ink debris from the transport belt. During a cleaning operation the cleaning surface remains stationary while the transport belt moves in a sliding relative motion with respect to the cleaning surface, which allows the ink debris to be collected on the cleaning surface. Once an ink contamination level associated with the ink debris attains a threshold and a set friction exceeds the threshold, the self-advancing cleaner advances.
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公开(公告)号：US10603897B2
公开(公告)日：2020-03-31
申请号：US15847010
申请日：2017-12-19
Applicant: Xerox Corporation
Inventor： Chu-Heng Liu
Abstract: A cleaning subsystem for a variable data lithography system includes a cleaning roller train having a cleaning member in physical contact with an imaging member such that residual ink remaining on the imaging member, such as following transfer of an inked latent image from the imaging member to a substrate, adheres to the cleaning member through cohesion and is thereby removed from the imaging member. The cleaning roller train uses the ink-splitting mechanics to remove, transport and collect the ink waste. The key cleaning roller train is a thin but uniform layer of ink on the cleaning member that contacts the imaging member causing removal on the residual ink through cohesion.
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