Patents by Inventor Thomas W. Ruhe

Thomas W. Ruhe 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).

  • Publication number: 20190001718
    Abstract: This invention relates to a component to modify a door of a printing system including an extension that increases a size of the door and a paper guide attached to the extension; a media handling system including a printing system, a secondary operation device adjacent to the printing system, and a door having an extension; and a door for a media handling system, where the door includes a first media travel path exiting a first exit of the door, a second media travel path exiting a second exit of the door, and a diverter diverting media from the first media travel path to the second media travel path.
    Type: Application
    Filed: April 7, 2016
    Publication date: January 3, 2019
    Inventors: Michael Kevin Bowen, Kevin Lo, Thomas W Ruhe, Catherine Elizabeth Gould, Richard Lee Brinkly, Steve o Rasmussen, Raymond C Sherman
  • Patent number: 9931866
    Abstract: An interleave member including a media control conforming surface and a media, crash prevention surface. The media crash prevention surface to periodically contact and guide the media to the media control conforming surface. The media control conforming surface conforming to a surface of the media control member.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: April 3, 2018
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David Olsen, Thomas W Ruhe, Robert Reiss, Alan Shibata, Todd M Gaasch, Raymond C Sherman, Robert Yraceburu, Hunter Cantrell
  • Publication number: 20170266994
    Abstract: An interleave member including a media control conforming surface and a media, crash prevention surface. The media crash prevention surface to periodically contact and guide the media to the media control conforming surface. The media control conforming surface conforming to a surface of the media control member.
    Type: Application
    Filed: August 19, 2014
    Publication date: September 21, 2017
    Inventors: David Olsen, Thomas W. Ruhe, Robert Reiss, Alan Shibata, Todd M Gaasch, Raymond C Sherman, Robert Yraceburu, Hunter Cantrell
  • Patent number: 8246163
    Abstract: A support rod is mounted to maintain straightness of a support surface of a printer. The support rod is used to preload the support surface in a direction opposite of an expected transverse load upon the support surface. The preloading supplied by the support rod counteracts a bending force on the support surface resulting from the expected transverse loading.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: August 21, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Thomas W. Ruhe, Geoffrey C. Mayne
  • Publication number: 20110310208
    Abstract: A support rod is mounted to maintain straightness of a support surface of a printer. The support rod is used to preload the support surface in a direction opposite of an expected transverse load upon the support surface. The preloading supplied by the support rod counteracts a bending force on the support surface resulting from the expected transverse loading.
    Type: Application
    Filed: June 16, 2010
    Publication date: December 22, 2011
    Inventors: Thomas W. Ruhe, Geoffrey C. Mayne
  • Patent number: 6543868
    Abstract: The spacing between the printhead of an inkjet printer cartridge and the print medium is dynamically controlled by an apparatus that slightly rotates the carriage that holds the cartridge. In one embodiment, the rotation is effected by actuation of a cam that resides between the rotatable carriage and a fixed part of the printer. The printhead-to-paper spacing is thus optimized for highest print quality.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: April 8, 2003
    Assignee: Hewlett-Packard Company
    Inventors: Brently L. Cooper, Matt G. Driggers, Thomas W. Ruhe
  • Patent number: 6431702
    Abstract: An inkjet printing method of fixing ink to a print medium is disclosed. An embodiment of the method comprises depositing ink drops on a print medium with an inkjet printhead, the ink including a solvent and the print medium including a first surface. The method additionally comprises vibrating the print medium by applying ultrasonic energy to displace drops of the solvent to the first surface of the print medium to accelerate evaporation of the drops of solvent. An apparatus for use in an inkjet printing device is also disclosed. An embodiment of the apparatus comprises an ultrasonic source configured to apply ultrasonic energy to a print medium to displace drops of ink solvent to a first surface of the print medium thereby accelerating evaporation of the drops of solvent. An inkjet printing device including the method and apparatus is also disclosed. Further characteristics and features of the method and apparatus are described herein, as are examples of various alternative embodiments.
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: August 13, 2002
    Assignee: Hewlett-Packard Company
    Inventor: Thomas W. Ruhe
  • Publication number: 20020070987
    Abstract: The spacing between the printhead of an inkjet printer cartridge and the print medium is dynamically controlled by an apparatus that slightly rotates the carriage that holds the cartridge. In one embodiment, the rotation is effected by actuation of a cam that resides between the rotatable carriage and a fixed part of the printer. The printhead-to-paper spacing is thus optimized for highest print quality.
    Type: Application
    Filed: September 4, 1998
    Publication date: June 13, 2002
    Inventors: BRENTLY L. COOPER, MATT G. DRIGGERS, THOMAS W. RUHE
  • Patent number: 6332068
    Abstract: A modular duplex media handling system is installable for use with a print recording system having a simplex media handling system. During first side printing a media sheet is fed along a first media path in the simplex system from feed rollers to metering rollers and into a print zone. After first side printing and prior to releasing the media sheet, the metering rollers feed the media sheet back along the first media path to the feed rollers. The feed rollers in turn feed the media sheet completely into the duplex module where the media moves along a loop path (in effect flipping the media sheet). The media sheet then is fed back to the feed rollers and along the first media path for second side printing. A humidity sensor in the duplex module signals to the print recording system whether the duplex handling system is installed.
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: December 18, 2001
    Assignee: Hewlett-Packard Company
    Inventors: Jeffrey R. Blackman, Thomas W. Ruhe, Larry A. Jackson, Thomas E. McCue, Jr., Kevin O'Hara
  • Patent number: 6293716
    Abstract: A modular duplex media handling system is used in conjunction with a simplex media handling print recording apparatus. The duplex media handling system is linked by a transmission to a print recording system drive motor. The drive motor drives feed rollers and metering rollers or the simplex media handling system. The transmission is media-activated to allow the duplex handling drive rollers to be disengaged, engaged for rotation in the same direction as the feed rollers, or engaged for rotation in the opposite direction as the feed rollers.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: September 25, 2001
    Assignee: Hewlett-Packard Company
    Inventors: Matt G. Driggers, Thomas W. Ruhe, Jeffrey R. Blackman
  • Publication number: 20010001560
    Abstract: An inkjet printing method of fixing ink to a print medium is disclosed. An embodiment of the method comprises depositing ink drops on a print medium with an inkjet printhead, the ink including a solvent and the print medium including a first surface. The method additionally comprises vibrating the print medium by applying ultrasonic energy to displace drops of the solvent to the first surface of the print medium to accelerate evaporation of the drops of solvent. An apparatus for use in an inkjet printing device is also disclosed. An embodiment of the apparatus comprises an ultrasonic source configured to apply ultrasonic energy to a print medium to displace drops of ink solvent to a first surface of the print medium thereby accelerating evaporation of the drops of solvent. An inkjet printing device including the method and apparatus is also disclosed. Further characteristics and features of the method and apparatus are described herein, as are examples of various alternative embodiments.
    Type: Application
    Filed: December 18, 2000
    Publication date: May 24, 2001
    Inventor: Thomas W. Ruhe
  • Publication number: 20010000462
    Abstract: A modular duplex media handling system is installable for use with a print recording system having a simplex media handling system. During first side printing a media sheet is fed along a first media path in the simplex system from feed rollers to metering rollers and into a print zone. After first side printing and prior to releasing the media sheet, the metering rollers feed the media sheet back along the first media path to the feed rollers. The feed rollers in turn feed the media sheet completely into the duplex module where the media moves along a loop path (in effect flipping the media sheet). The media sheet then is fed back to the feed rollers and along the first media path for second side printing. A humidity sensor in the duplex module signals to the print recording system whether the duplex handling system is installed.
    Type: Application
    Filed: December 18, 2000
    Publication date: April 26, 2001
    Inventors: Jeffrey R. Blackman, Thomas W. Ruhe, Larry A. Jackson, Thomas E. McCue, Kevin O'Hara
  • Patent number: 6203151
    Abstract: An inkjet printing method of fixing ink to a print medium is disclosed. An embodiment of the method comprises depositing ink drops on a print medium with an inkjet printhead, the ink including a solvent and the print medium including a first surface. The method additionally comprises vibrating the print medium by applying ultrasonic energy to displace drops of the solvent to the first surface of the print medium to accelerate evaporation of the drops of solvent. An apparatus for use in an inkjet printing device is also disclosed. An embodiment of the apparatus comprises an ultrasonic source configured to apply ultrasonic energy to a print medium to displace drops of ink solvent to a first surface of the print medium thereby accelerating evaporation of the drops of solvent. An inkjet printing device including the method and apparatus is also disclosed. Further characteristics and features of the method and apparatus are described herein, as are examples of various alternative embodiments.
    Type: Grant
    Filed: June 8, 1999
    Date of Patent: March 20, 2001
    Assignee: Hewlett-Packard Company
    Inventor: Thomas W. Ruhe
  • Patent number: 6167231
    Abstract: A modular duplex media handling system is installable for use with a print recording system having a simplex media handling system. During first side printing a media sheet is fed along a first media path in the simplex system from feed rollers to metering rollers and into a print zone. After first side printing and prior to releasing the media sheet, the metering rollers feed the media sheet back along the first media path to the feed rollers. The feed rollers in turn feed the media sheet completely into the duplex module where the media moves along a loop path (in effect flipping the media sheet). The media sheet then is fed back to the feed rollers and along the first media path for second side printing. A humidity sensor in the duplex module signals to the print recording system whether the duplex handling system is installed.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: December 26, 2000
    Assignee: Hewlett-Packard Company
    Inventors: Jeffrey R. Blackman, Thomas W. Ruhe, Larry A. Jackson, Thomas E. McCue, Jr., Kevin O'Hara
  • Patent number: 6149327
    Abstract: Print media drying time need not be set to an artificially high "worst case" drying time. Instead a reliable drying time is estimated based upon factors, such as temperature, humidity, media type, print quality and ink drop volume. When the estimated drying time is undesirably slow, the estimated and actual drying time is reduced by altering the ink composition of the image to be printed. One technique is to over-print or under-print with composite black rather than a true pigment black. Another technique is to deplete the black ink used throughout the image.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: November 21, 2000
    Assignee: Hewlett-Packard Company
    Inventors: Jefferson P. Ward, Thomas W. Ruhe, Thomas E. McCue, Jr.
  • Patent number: 6045212
    Abstract: A rising rate integral spring drive belt system for driving a carriage carrying an inkjet printhead is quieter and more economical than earlier systems. An integral spring drive belt of a resilient material is secured to the carriage and driven by a motor to selectively move the carriage across the printzone. The belt is of a resilient elastomeric material. The belt has an integral spring portion with two segmented members defining a void therebetween and a web member coupling together the two segmented members. The remainder of the belt has a constant spring constant, while the spring portion has a higher spring constant which varies with the degree of tension experienced by the belt. The variable spring constant allows the spring portion to more readily respond to and damp periodic belt tension vibrations to provide a quieter, more economical printing mechanism. A method is provided driving an inkjet printhead carriage.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: April 4, 2000
    Assignee: Hewlett-Packard Company
    Inventors: Thomas W. Ruhe, Brently L. Cooper
  • Patent number: 6029020
    Abstract: A media sheet is picked and moved along a media path toward a print zone. During the operation a media sensor detects whether the media sheet is properly oriented to receive print recording. For example, for glossy paper, photographic paper or letterhead there is a proper side of the paper for recording and a backside of the paper which typically does not receive print recording. If the proper side is not oriented to receiving print recording, then the media sheet is flipped by a modular duplex media handling system.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: February 22, 2000
    Assignee: Hewlett-Packard Company
    Inventors: Jeffrey R. Blackman, Thomas W. Ruhe
  • Patent number: 6018640
    Abstract: During first side printing a media sheet is fed along a first media path from feed rollers to metering rollers and into a print zone. After first side printing, the metering roller stops prior to releasing the media sheet into the output tray. The metering roller reverses direction to move the media sheet back along the first media path onto the feed roller, and into the modular duplex handling system. The media sheet is flipped, then fed back for second side printing. Second side printing is performed in either one of book mode or tablet mode. In book mode, the top of the page is the same edge of the media sheet for the first side and the second side. In tablet mode, the media sheet edge at the top of the first side corresponds to the bottom of the second side.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: January 25, 2000
    Assignee: Hewlett-Packard Company
    Inventors: Jeffrey R. Blackman, Thomas W. Ruhe
  • Patent number: 5964542
    Abstract: A carriage drive system includes a timing belt pivotally anchored to a carriage. A drive motor rotates the timing belt, moving the carriage along a carriage path. The drive belt moves along a pair of pulleys. A first pulley is coupled to the motor's drive shaft. A second pulley is coupled to an idler spring. The idler spring determines the belt tension when the belt is stationary. Acceleration of the carriage alters the belt tension. A pivot connection occurs between the drive belt and the carriage. During acceleration, the pivotal connection rotates shortening the effective length of the belt, which in turn stretches the idler spring, and increases belt tension. While the carriage is at rest or moving at constant velocity, the pivot connection serves to reduce side load impact on the drive motor's shaft and windings. The pivot connection also isolates the carriage from high frequency vibrations.
    Type: Grant
    Filed: June 3, 1998
    Date of Patent: October 12, 1999
    Assignee: Hewlett-Packard Company
    Inventors: Thomas W. Ruhe, Jason Quintana, Geoff Wotton
  • Patent number: D431046
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: September 19, 2000
    Assignee: Hewlett-Packard Company
    Inventors: Daniel R. Dwyer, Thomas W. Ruhe, Jeffrey R. Blackman, Corlene M. Ankrum, Eric S. Schuh