Patents by Inventor Matthew A. Shepherd

Matthew A. Shepherd has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • PROCESSING 3D OBJECT MODELS
    Publication number: 20200233400
    Abstract: In an example implementation, a method of processing a 3D object model includes receiving render data of a 2D slice of a 3D object model and generating distance values indicating how far away voxels in the 2D slice are from a nearest edge of the 3D object model. The method also includes detecting a feature of the 3D object model from the distance values, and generating modified render data to be subsequently used in a 3D printing system to produce the feature in a 3D part.
    Type: Application
    Filed: October 14, 2017
    Publication date: July 23, 2020
    Inventors: Jake Wright, Matthew A Shepherd
  • Three-dimensional (3D) printing
    Patent number: 10682810
    Abstract: In an example of a three-dimensional printing method, a polymeric build material is applied. A fusing agent is selectively applied on at least a portion of the polymeric build material. The fusing agent includes cesium tungsten oxide nanoparticles, a zwitterionic stabilizer, and an aqueous vehicle. The polymeric build material is exposed to electromagnetic radiation to fuse the portion of the polymeric build material in contact with the fusing agent to form a layer.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: June 16, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Stephen G. Rudisill, Vladek Kasperchik, Alexey S. Kabalnov, Shannon Reuben Woodruff, Thomas M. Sabo, Jake Wright, Hector Lebron, Vanessa Verzwyvelt, Morgan T. Schramm, Matthew A. Shepherd
  • SELECTIVELY FIRING A FLUID CIRCULATION ELEMENT
    Publication number: 20200180310
    Abstract: According to an example, a printing apparatus may include two drop ejecting elements, a fluid circulating element, and a logic device. The logic device may determine whether one or both of a first drop ejecting element and a second drop ejecting element have been fired within a predetermined period of time prior to a current time. In response to the determination, the logic device may selectively transmit an output signal that is to cause the fluid circulating element to be selectively fired, in which the fluid circulating element is positioned to circulate fluid adjacent to both the first drop ejecting element and the second drop ejecting element.
    Type: Application
    Filed: February 13, 2020
    Publication date: June 11, 2020
    Inventors: Guan-Kwee Goh, Matthew A. Shepherd, Mark Mackenzie
  • DENSITY CLASSIFIERS BASED ON PLANE REGIONS
    Publication number: 20200122116
    Abstract: In an example, a print system include a component device that is operation in a number of state, a density engine, and a component engine. An example density engine identifies a plane region of a plane where print fluid is to be printed based on data of a print job and determines a density classifier for the plane based on a location of the plane region on the plane. An example component engine causes an adjustment of a component attribute of the component device based on the density classifier.
    Type: Application
    Filed: December 20, 2019
    Publication date: April 23, 2020
    Inventors: Dawn M. Beachnau Hood, Matthew A. Shepherd, Mark H. MacKenizw, Weiyun Sun, Milan Justel, Robert Yraceburu, Steve O. Rasmussen
  • PRINTER HAVING PRINT ASSEMBLY
    Publication number: 20200108599
    Abstract: A printer and method having a print assembly movable over a print zone, and a controller associated with the print assembly. The printer is capable to receive a second print assembly with an associated second controller. The first controller positions the first print assembly over the print media and to position the second print assembly over the print media. The first controller directs the first print assembly in printing. The second controller to direct the second print assembly in printing.
    Type: Application
    Filed: June 6, 2017
    Publication date: April 9, 2020
    Inventors: Bruce A. Axten, Thomas Griffiths, Matthew A. Shepherd, Thieu C. Dang
  • Dynamic threshold based error diffusion
    Patent number: 10602020
    Abstract: In some examples, dynamic threshold based error diffusion may include determining whether a pixel associated with a pattern to be printed includes a lighter tone or a darker tone compared to an adjacent pixel. In response to a determination that the pixel associated with the pattern to be printed includes the lighter tone or the darker tone compared to the adjacent pixel, a firing threshold may be respectively increased or decreased to respectively decrease or increase a likelihood of printing of the pattern.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: March 24, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jay S Gondek, Jason M Quintana, Matthew A Shepherd
  • Selectively firing a fluid circulation element
    Patent number: 10596814
    Abstract: According to an example, a printing apparatus may include two drop ejecting elements, a fluid circulating element, and a logic device. The logic device may determine whether one or both of a first drop ejecting element and a second drop ejecting element have been fired within a predetermined period of time prior to a current time. In response to the determination, the logic device may selectively transmit an output signal that is to cause the fluid circulating element to be selectively fired, in which the fluid circulating element is positioned to circulate fluid adjacent to both the first drop ejecting element and the second drop ejecting element.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: March 24, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Guan-Kwee Goh, Matthew A Shepherd, Mark Mackenzie
  • Spreader roller for additive manufacturing
    Patent number: 10589464
    Abstract: In one example, a temperature control system for a spreader roller in an additive manufacturing machine includes: a first duct to carry air to an air passage through the roller; a second duct to carry air away from the air passage through the roller; a fan to move air through the ducts; a temperature sensor to sense a temperature of the roller; and a controller to control a flow of air through the ducts based on a temperature sensed by the sensor.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: March 17, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: William Winters, Wesley R. Schalk, Matthew A. Shepherd, Matt G. Driggers, Justin M. Roman
  • Density classifiers based on plane regions
    Patent number: 10560584
    Abstract: In an example, a print system include a component device that is operation in a number of state, a density engine, and a component engine. An example density engine identifies a plane region of a plane where print fluid is to be printed based on data of a print job and determines a density classifier for the plane based on a location of the plane region on the plane. An example component engine causes an adjustment of a component attribute of the component device based on the density classifier.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: February 11, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Dawn M Beachnau Hood, Matthew A Shepherd, Mark H MacKenize, Weiyun Sun, Milan Justel, Robert Yraceburu, Steve O Rasmussen
  • DYNAMIC THRESHOLD BASED ERROR DIFFUSION
    Publication number: 20200036861
    Abstract: In some examples, dynamic threshold based error diffusion may include determining whether a pixel associated with a pattern to be printed includes a lighter tone or a darker tone compared to an adjacent pixel. In response to a determination that the pixel associated with the pattern to be printed includes the lighter tone or the darker tone compared to the adjacent pixel, a firing threshold may be respectively increased or decreased to respectively decrease or increase a likelihood of printing of the pattern.
    Type: Application
    Filed: October 31, 2016
    Publication date: January 30, 2020
    Inventors: Jay S Gondek, Jason M Quintana, Matthew A Shepherd
  • Digital image scaling
    Patent number: 10540747
    Abstract: Examples include computing devices, processes, and/or machine-readable storage mediums. Examples analyze a region of pixels for a digital image to determine a set of diagonal direction pixel differences corresponding to a target pixel. Examples analyze the region of pixels to determine diagonal variances corresponding to the target pixel. Examples scale the digital image by processing the target pixel into a set of subpixels based at least in part on the set of diagonal direction pixel differences and the diagonal variances.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: January 21, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jay S Gondek, Matthew A Shepherd
  • Die alignment with indexing scanbar
    Patent number: 10377160
    Abstract: A method including printing a calibration pattern with a wide array printhead having a plurality of printhead dies. The method includes scanning the calibration pattern with a scanbar having a width less than a width of the wide array printhead by indexing the scanbar to a plurality of selected positions across a width of the calibration pattern and providing a scanned calibration image at each selected position, the calibration images together providing a scan of the full width of the calibration pattern, and measuring alignment between successive printhead dies based on the calibration images.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: August 13, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Hsue-Yang Liu, Matthew A Shepherd
  • Mitigating dot placement errors for a print job
    Patent number: 10326911
    Abstract: A system, method, and non-transitory computer readable medium are disclosed for mitigating dot placement errors for a given print job. The method includes processing tone values on a per pixel basis to determine whether to implement plane dependence. Plane independence is implemented if the tone value exceeds a predetermined threshold. The method may be performed on a pixel by pixel basis and/or a print object or region basis. Determining whether to implement plane dependence may involve de-asserting or partially de-asserting a plane dependence component of an executed half-toning instruction between sequentially processed color planes of a printing system.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: June 18, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jason Quintana, Tsuyoshi Yamashita, Matthew A Shepherd
  • INDEXING IN 3D PRINTING
    Publication number: 20190111619
    Abstract: In an example implementation, a method of printing a three-dimensional (3D) object includes scanning a print bar in a first direction over a build platform of a 3D printer to deposit a liquid agent onto a layer of build powder. The print bar is then indexed in a second direction substantially orthogonal to the first direction before scanning the print bar back over the build platform in a third direction opposite the first direction to deposit additional liquid agent onto the layer of build powder.
    Type: Application
    Filed: July 22, 2016
    Publication date: April 18, 2019
    Inventors: Wesley R. Schalk, Matthew A. Shepherd, Arthur H. Barnes
  • ADDITIVE MANUFACTURING
    Publication number: 20190039303
    Abstract: In one example, a fusing system for an additive manufacturing machine includes a first carriage carrying a layering device and a fusing lamp, and a second carriage carrying a fusing agent dispenser. The first carriage and the second carriage are movable back and forth over the work area along the same line of motion so that the first carriage follows the second carriage in one direction and the second carriage follows the first carriage in the other direction.
    Type: Application
    Filed: October 19, 2016
    Publication date: February 7, 2019
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Arthur H. BARNES, Wesley R. SCHALK, Matthew A. SHEPHERD
  • SPREADER ROLLER FOR ADDITIVE MANUFACTURING
    Publication number: 20190030804
    Abstract: In one example, a temperature control system for a spreader roller in an additive manufacturing machine includes: a first duct to carry air to an air passage through the roller; a second duct to carry air away from the air passage through the roller; a fan to move air through the ducts; a temperature sensor to sense a temperature of the roller; and a controller to control a flow of air through the ducts based on a temperature sensed by the sensor.
    Type: Application
    Filed: March 17, 2016
    Publication date: January 31, 2019
    Inventors: William Winters, Wesley R. Schalk, Matthew A. Shepherd, Matt G. Driggers, Justin M. Roman
  • SELECTIVELY FIRING A FLUID CIRCULATION ELEMENT
    Publication number: 20190023008
    Abstract: According to an example, a printing apparatus may include two drop ejecting elements, a fluid circulating element, and a logic device. The logic device may determine whether one or both of a first drop ejecting element and a second drop ejecting element have been fired within a predetermined period of time prior to a current time. In response to the determination, the logic device may selectively transmit an output signal that is to cause the fluid circulating element to be selectively fired, in which the fluid circulating element is positioned to circulate fluid adjacent to both the first drop ejecting element and the second drop ejecting element.
    Type: Application
    Filed: April 29, 2016
    Publication date: January 24, 2019
    Inventors: Guan-Kwee Goh, Matthew A Shepherd, Mark Mackenzie
  • THREE-DIMENSIONAL (3D) PRINTING
    Publication number: 20180333914
    Abstract: In an example of a three-dimensional printing method, a polymeric build material is applied. A fusing agent is selectively applied on at least a portion of the polymeric build material. The fusing agent includes cesium tungsten oxide nanoparticles, a zwitterionic stabilizer, and an aqueous vehicle. The polymeric build material is exposed to electromagnetic radiation to fuse the portion of the polymeric build material in contact with the fusing agent to form a layer.
    Type: Application
    Filed: July 31, 2018
    Publication date: November 22, 2018
    Inventors: Stephen G. Rudisill, Vladek Kasperchik, Alexey S. Kabalnov, Shannon Reuben Woodruff, Thomas M. Sabo, Jake Wright, Hector Lebron, Vanessa Verzwyvelt, Morgan T. Schramm, Matthew A. Shepherd
  • PAGE GAP NOZZLE SPITTING
    Publication number: 20180297382
    Abstract: A method for inkjet nozzle spitting including conveying pages in a print direction along a transport through a printzone of a wide array printhead formed by a plurality of rows of nozzles disposed crosswise to the print direction, the nozzles to eject ink drops in accordance with print data. The method further includes maintaining a gap between pages as the gap moves through the printzone, and providing spit pattern data as print data to the printhead to successively activate each row of nozzles, in the print direction and in synchronism with movement of the gap, to eject ink drops from all nozzles of the row so that a position of the activated row of nozzles is maintained within the gap as the gap continuously moves through the printzone.
    Type: Application
    Filed: February 16, 2016
    Publication date: October 18, 2018
    Inventors: Mark H MacKenzie, Matthew A Shepherd, Vanessa Verzwyvelt, Bruce A Axten, Weiyun Sun
  • Ink modulation for nozzles
    Patent number: 10086606
    Abstract: A printer is disclosed. The printer has a print engine that mounts a first printhead and a second printhead adjacent to the first printhead in a staggered line of overlapping printheads. Each printhead has at least one row of nozzles. The blending nozzles in the first printhead overlap with blending nozzles in the second printhead. When printing, the non-overlapping nozzles in the first printhead use a default ink modulation amount and the blending nozzles in both printheads use a scaled ink modulation amount.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: October 2, 2018
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Matthew A Shepherd, Hsue-Yang Liu