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公开(公告)号：US11766874B2
公开(公告)日：2023-09-26
申请号：US17531098
申请日：2021-11-19
Applicant: Xerox Corporation
Inventor： Peter J. Knausdorf , Anthony S. Condello , Jack T. Lestrange , Palghat S. Ramesh , Joseph C. Sheflin
CPC classification number: B41J2/471 , B41M5/267 , G02B7/1815 , G02B26/0833
Abstract: Apparatus and method for using a line laser (LL) to quickly mark a substrate or media by utilizing a laser additive on/within the substrate/media, which greatly reduces the power requirement for marking the substrate/media. The combination of the LL wide swath (>305 mm) and the improved media/surface sensitivity to laser wavelength allows the LL marking system to achieve faster marking than other systems. The LL is mounted over a transport which transports the sensitized substrate/media past the LL for marking. The desired image is projected from the LL line by line in synch with the moving media and once the media passes the beam path of the LL, marking is complete. In this case, the media has been physically-altered via the heat generated by the LL interacting with the photosensitized media and is permanent. A second method would use a photosensitizing agent coated on top of the media to be marked.
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公开(公告)号：US20230234352A1
公开(公告)日：2023-07-27
申请号：US17648731
申请日：2022-01-24
Applicant: Xerox Corporation
Inventor： Palghat S. Ramesh , Jack T. LeStrange , Anthony S. Condello , Joseph C. Sheflin , Peter Knausdorf
CPC classification number: B41J2/095 , B41J2/195 , B41J2/2132 , B41J2/125 , B41J11/02
Abstract: A color inkjet printer includes an electrode that emits an electric field into a gap between a printhead and a media transport that carries media past the printhead. Image data generated by an optical sensor after an ink image is printed on the media is analyzed to measure at least one image quality metric. When the measured image quality metric is outside of a tolerance range, the voltage of a voltage source electrically connected to the electrode is adjusted to improve the wetting of the media type with the ink ejected by the printhead.
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公开(公告)号：US11654482B2
公开(公告)日：2023-05-23
申请号：US17367991
申请日：2021-07-06
Applicant: XEROX CORPORATION
Inventor： Joseph C. Sheflin , Jason M. LeFevre
CPC classification number: B22D46/00 , B22D23/003 , B33Y10/00 , B33Y50/02
Abstract: 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.
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公开(公告)号：US20230051340A1
公开(公告)日：2023-02-16
申请号：US17400202
申请日：2021-08-12
Applicant: XEROX CORPORATION
Inventor： Chu-Heng Liu , Jason M. Lefevre , Joseph C. Sheflin , Seemit Praharaj , Douglas K. Herrmann , David A. Vankouwenberg , Linn C. Hoover
Abstract: The present disclosure discloses methods and systems for removing dross from a liquid metal chamber, such as would be used in magnetohydrodynamic (MHD) or metal 3D printing. The method and systems comprise inserting a dross removal tool into a liquid metal chamber. A seal is compromised, fluidically connecting an evacuated volume and the liquid metal chamber. Pressure equalizes between the fluidically coupled volumes through an inflow of gas, liquid, and solid components from the liquid metal chamber into the dross removal tool. The dross removal tool is removed from the liquid metal chamber.
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公开(公告)号：US20230015142A1
公开(公告)日：2023-01-19
申请号：US17374762
申请日：2021-07-13
Applicant: XEROX CORPORATION
Inventor： Linn C. Hoover , Joseph C. Sheflin , Jason M. LeFevre , Seemit Praharaj , David Alan Vankouwenberg , Chu-Heng Liu , Douglas K. Herrmann, JR.
Abstract: A dross extraction system for a printer is disclosed, which includes an ejector defining an inner cavity associated therewith, the inner cavity retaining a liquid printing material. The dross extraction system also includes a first inlet coupled to the inner cavity of the ejector, a probe external to the ejector, which is selectably positionable to contact the liquid printing material to attract dross thereto, thereby extracting dross from the liquid printing material when the probe is withdrawn from the liquid printing material. A method of extracting dross from a metal jetting printer is also disclosed, which includes pausing an operation of the metal jetting printer, advancing a probe into a melt pool within a nozzle pump reservoir in the metal jetting printer, extracting dross from the metal printing material and onto the probe, retracting the probe from the nozzle pump reservoir, and resuming the operation of the metal jetting printer.
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Patent Agency Ranking
公开(公告)号：US20230008592A1
公开(公告)日：2023-01-12
申请号：US17367991
申请日：2021-07-06
Applicant: XEROX CORPORATION
Inventor： Joseph C. Sheflin , Jason M. LeFevre
Abstract: 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.
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公开(公告)号：US20220219238A1
公开(公告)日：2022-07-14
申请号：US17147773
申请日：2021-01-13
Applicant: Xerox Corporation
Inventor： Jason M. LeFevre , Joseph C. Sheflin , Paul J. McConville , Joshua Hilton
Abstract: A three-dimensional (3D) metal object manufacturing apparatus is equipped with a removable vessel to reduce the time required for start-up procedures after the printer is serviced. The removable vessel is filled with solid metal that is heated to its melting temperature before the bulk wire is inserted into the vessel to commence printing operations. The melting of the solid metal in the removable vessel requires less time that the melting of an length of bulk wire adequate to produce a volume of melted metal suitable for printer operation. The solid metal in the removable vessel can be metal pellets, metal powder, or a solid metal insert.
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公开(公告)号：US11376840B2
公开(公告)日：2022-07-05
申请号：US16913302
申请日：2020-06-26
Applicant: Xerox Corporation
Inventor： Joseph C. Sheflin , Jack T. Lestrange , Anthony S. Condello , Palghat S. Ramesh , Brian M. Balthasar
Abstract: Examples of the preferred embodiments use printed content (e.g., halftones, difference in grayscale or darkness) to determine thickness of fountain solution applied by a fountain solution applicator on an imaging member surface and/or determine image forming device real-time image forming modifications for subsequent printings. For example, in real-time during the printing of a print job, a sensor may measure halftones or grayscale differences between printed content and non-printed content of a current printing on print substrate. Based on this measurement of printed content output from the image forming device, the image forming device may adjust image forming (e.g., fountain solution deposition flow rate, imaging member rotation speed) to reach or maintain a preferred fountain solution thickness on the imaging member surface for subsequent (e.g., next) printings of the print job.
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公开(公告)号：US10946686B2
公开(公告)日：2021-03-16
申请号：US16943488
申请日：2020-07-30
Applicant: Xerox Corporation
Inventor： Jack T. LeStrange , Peter J. Knausdorf , Joseph C. Sheflin
Abstract: An intermediate roller positioned between a fountain solution vapor supply and an imaging member decouples fountain solution vapor deposition from the surface of the imaging member. The intermediate roller may be temperature controlled. A uniform layer of fountain solution condenses onto the surface of the temperature controlled intermediate roller regardless of the imaging blanket temperature. The fountain solution condensate layer deposited onto the intermediate roller splits and deposits a thin uniform layer of fountain solution liquid onto the imaging member surface. This liquid layer split may be independent of the temperature of the imaging member surface, resulting in a uniform layer of fountain solution on the imaging blanket for better imaging quality. Remotely locating the vaporizing chamber away from the imaging member prevents undesired heat transfer from a hot vaporizing chamber/baffle to the imaging member surface.
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公开(公告)号：US08840223B2
公开(公告)日：2014-09-23
申请号：US13680579
申请日：2012-11-19
Applicant: Xerox Corporation
Inventor： Howard A. Mizes , Michael J. Levy , Joseph C. Sheflin
IPC: B41J29/393 , G06K15/02
CPC classification number: G06K15/02 , B41J29/393 , B41J2029/3935
Abstract: A method of operating a printer to detect errors in an optical sensor includes forming a printed line across a first side of a print medium and generating first image data corresponding to the printed line with the optical sensor. The optical sensor generates second image data of the second side of the print medium as the print medium passes the optical sensor a second time. A detect in the optical sensor is identified with reference to a difference between process direction alignments of the line in the first image data and the second image data.
Abstract translation: 操作打印机以检测光学传感器中的错误的方法包括在打印介质的第一侧上形成印刷线，并用光学传感器产生与印刷线对应的第一图像数据。 当打印介质第二次通过光学传感器时，光学传感器产生打印介质第二面的第二图像数据。 参考第一图像数据中的线的处理方向对齐与第二图像数据之间的差异来识别光学传感器中的检测。
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