Patents by Inventor Mark H. MacKenzie

Mark H. MacKenzie 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).

  • Patent number: 11220107
    Abstract: The present disclosure includes a description of an example printhead having multiple ejection dies. The ejection dies are coupled to a temperature sensor and send temperature signals to a controller. The printhead can also include a heater coupled to the ejection dies to apply heat to at least one ejection die.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: January 11, 2022
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Garrett E Clark, Michael W. Cumbie, Mark H. MacKenzie
  • Patent number: 11040329
    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 20, 2019
    Date of Patent: June 22, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Dawn M Beachnau Hood, Matthew A Shepherd, Mark H MacKenzie, Weiyun Sun, Milan Justel, Robert Yraceburu, Steve O Rasmussen
  • Patent number: 10894429
    Abstract: According to an example, an apparatus may include a fluid coverage engine to determine which pixels of an image are to receive print fluid. The apparatus may also include a pixel count engine to compute a count of pixels at which print fluid is to be applied onto a media from the determined pixels of the image that are to receive print fluid, a target temperature engine to determine a target temperature for a dryer based upon the computed count of pixels, and a dryer engine to cause the dryer to become heated to the determined target temperature.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: January 19, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Weiyun Sun, Dawn M Beachnau Hood, Robert Yraceburu, Mark H Mackenzie, Brooke Hoyer
  • Patent number: 10870291
    Abstract: In one example, a partially dried inkjet media conditioner can include: a print engine that encases a print zone within a housing, and a media path to provide partially dried inkjet media from the print zone to a conditioner within the print engine, wherein the conditioner comprises a heated pressure roller.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: December 22, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Steve O Rasmussen, Kevin Lo, Richard Lee Brinkly, Mark H MacKenzie
  • Patent number: 10780699
    Abstract: In one example in accordance with the present disclosure a printhead is described. The printhead includes a number of nozzles to deposit an amount of fluid onto a print medium and an ink delivery system to deliver the amount of fluid from an ink tank to the number of nozzles. The printhead also includes an attachment feature to removably couple a removable printhead cover to the printhead. The printhead further includes a removable printhead cover removably coupled to the printhead at the attachment feature.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: September 22, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Garrett E. Clark, Mark H. MacKenzie
  • Patent number: 10682871
    Abstract: In one example implementation, a printing device may comprise a number of media skewing rollers to skew a print medium to a predetermined angle with respect to a media feed path and a print engine to print an image on the skewed print medium, the print engine skewing a digital representation of the image based on the predetermined angle such that the image printed is aligned with the print medium. In another example implementation, a printing device may comprise a number of skewing rollers to skew a print medium to a predetermined angle with respect to a media path, a number of pinch rollers to receive the skewed print medium prior to printing, and a print engine skewed to the same predetermined angle as the skewed print medium.
    Type: Grant
    Filed: July 13, 2015
    Date of Patent: June 16, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Luke P. Sosnowski, Mark H. MacKenzie
  • Patent number: 10661567
    Abstract: Printheads and methods of fabricating printheads are disclosed. An example printhead includes a substrate and a printhead die disposed on a surface of the substrate, where a top surface of the printhead die projects a first distance from the surface of the substrate. The example printhead also includes a barrier at least partially surrounding the printhead die. A top surface of the barrier projects a second distance from the surface of the substrate, where the first distance is less than the second distance.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: May 26, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Michael W. Cumbie, Chien-Hua Chen, Mark H. MacKenzie, Garrett E. Clark
  • Patent number: 10479110
    Abstract: In one example, a system for partially dried inkjet media fusers include a plurality of fusers aligned to receive partially dried inkjet media from a printing device, wherein the plurality of fusers each comprise a top roller and a bottom roller to apply pressure to the received partially dried inkjet media, and a finisher to receive the partially dried inkjet media from the plurality of fusers.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: November 19, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Steve O Rasmussen, Mark H MacKenzie, Bradley B Branham, Jeffrey G Bingham
  • Patent number: 10434770
    Abstract: A temperature of one printing element is adjusted based upon a temperature of another of printing element.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: October 8, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Garrett E. Clark, Michael W. Cumbie, Mark H. MacKenzie, Jose Luis Valero
  • Patent number: 10427406
    Abstract: The present disclosure includes a description of an example print bar that includes an ejection die disposed on a support element, and a sensor disposed at a particular location on the support element.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: October 1, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Garrett E. Clark, Michael W. Cumbie, Jeremy Sells, Mark H. MacKenzie
  • Patent number: 10363745
    Abstract: Examples described herein include a printhead assembly that includes a housing having a printing material reservoir and a print nozzle array disposed in a side of the housing. The print nozzle array is coupled to the printing material reservoir through a first channel. The printhead assembly can also include a pressure equalization element disposed in the side of the housing and coupled to the printing material reservoir through a second channel to allow air to enter the printing material reservoir when a pressure in the printing material reservoir changes.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: July 30, 2019
    Assignee: HEWLETT -PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Garrett E. Clark, Michael W. Cumbie, Mark H. MacKenzie
  • Patent number: 10343433
    Abstract: A skew sensor calibration unit including a scanner providing a scanned image of a sheet as the sheet is conveyed along a transport path, the scanned image including a leading edge of the sheet and a skew detection pattern printed thereon by a printhead. A calibration module measures a top skew of the sheet based on position signals from a plurality of skew sensors indicating a position of a leading edge of a sheet as the sheet is conveyed along the transport path, measure an image skew of the sheet relative to the printhead based on the scanned image, and generates a calibration factor that when applied to the measured top skew provides a calibrated top skew that matches the image skew.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: July 9, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Hsue-Yang Liu, Luke P. Sosnowski, Mark H. Mackenzie
  • Patent number: 10343397
    Abstract: In one example in accordance with the present disclosure a printer cartridge is described. The printer cartridge includes at least one backpressure chamber to provide backpressure to a fluid during deposition of the fluid onto a print medium. The printer cartridge also includes multiple fluid chambers in fluid communication with the at least one backpressure chamber. A fluid chamber provides fluid to a portion of a printhead. Adjacent fluid chambers are selectively in fluid communication with one another via valves.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: July 9, 2019
    Inventors: Mark H. MacKenzie, Garrett E. Clark, Michael W. Cumbie
  • Publication number: 20190202216
    Abstract: According to an example, an apparatus may include a fluid coverage engine to determine which pixels of an image are to receive print fluid. The apparatus may also include a pixel count engine to compute a count of pixels at which print fluid is to be applied onto a media from the determined pixels of the image that are to receive print fluid, a target temperature engine to determine a target temperature for a dryer based upon the computed count of pixels, and a dryer engine to cause the dryer to become heated to the determined target temperature.
    Type: Application
    Filed: September 12, 2016
    Publication date: July 4, 2019
    Inventors: Weiyun Sun, Dawn M Beachnau Hood, Robert Yraceburu, Mark H Mackenzie, Brooke Hoyer
  • Publication number: 20190176491
    Abstract: In one example, a partially dried inkjet media conditioner can include: a print engine that encases a print zone within a housing, and a media path to provide partially dried inkjet media from the print zone to a conditioner within the print engine, wherein the conditioner comprises a heated pressure roller.
    Type: Application
    Filed: September 2, 2016
    Publication date: June 13, 2019
    Inventors: Steve O Rasmussen, Kevin Lo, Richard Lee Brinkly, Mark H MacKenzie
  • Patent number: 10207497
    Abstract: Selecting nozzles can include selecting nozzles of a plurality of nozzles to print a portion of a print job based on content of the print job and assigning firing reservations to the selected nozzles, where a total number of the firing reservations assigned to the selected nozzles is comparatively less than a total number of the plurality of nozzles.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: February 19, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Michael W. Cumbie, Garrett E. Clark, Mark H. MacKenzie
  • Publication number: 20180326728
    Abstract: The present disclosure includes a description of an example print bar that includes an ejection die disposed on a support element, and a sensor disposed at a particular location on the support element.
    Type: Application
    Filed: February 5, 2016
    Publication date: November 15, 2018
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Garrett E. Clark, Michael W. Cumbie, Jeremy Sells, Mark H. MacKenzie
  • Publication number: 20180311956
    Abstract: The present disclosure includes a description of an example printhead having multiple ejection dies. The ejection dies are coupled to a temperature sensor and send temperature signals to a controller. The printhead can also include a heater coupled to the ejection dies to apply heat to at least one ejection die.
    Type: Application
    Filed: February 5, 2016
    Publication date: November 1, 2018
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Garrett E Clark, Michael W. Cumbie, Mark H. MacKenzie
  • Publication number: 20180311959
    Abstract: Examples described herein include a printhead assembly that includes a housing having a printing material reservoir and a print nozzle array disposed in a side of the housing. The print nozzle array is coupled to the printing material reservoir through a first channel. The printhead assembly can also include a pressure equalization element disposed in the side of the housing and coupled to the printing material reservoir through a second channel to allow air to enter the printing material reservoir when a pressure in the printing material reservoir changes.
    Type: Application
    Filed: February 5, 2016
    Publication date: November 1, 2018
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Garrett E. Clark, Michael W. Cumbie, Mark H. MacKenzie
  • 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