Patents by Inventor Daniel W. Underkofler

Daniel W. Underkofler 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: 9135943
    Abstract: A tape guide is provided for use with a tape drive that is configured to receive a length of tape having a tape width. The tape guide includes a body having an outer surface for receiving the tape thereon, and flanges on opposite ends of the body. The flanges may be spaced apart by a distance that is 125 to 500 microns greater than the tape width.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: September 15, 2015
    Assignee: ORACLE INTERNATIONAL CORPORATION
    Inventors: Daniel W. Underkofler, William J. Vanderheyden
  • Patent number: 9042055
    Abstract: A tape guide roller, for use with a tape drive that is configured to receive a length of tape, includes a roller body having an outer surface with one or more grooved areas and one or more non-grooved areas. The one or more grooved areas make up seventy-five percent or less of the outer surface, and the one or more non-grooved areas make up at least twenty-five percent of the outer surface. Furthermore, the one or more grooved areas are configured to affect traction between the roller body and the tape as the tape passes over the roller body.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: May 26, 2015
    Assignee: ORACLE INTERNATIONAL CORPORATION
    Inventors: Peter R. Coburn, Daniel W. Underkofler
  • Patent number: 8982493
    Abstract: A control system for a tape drive that uses position error signals (PESs) generated by a tape head assembly of the tape drive during longitudinal movement of a tape through the drive to dynamically adjust a lateral and/or angular position of tape to enhance tape drive performance (e.g., the ability of a tape head assembly to precisely follow one or more data and/or servo tracks on the tape). In one arrangement, the PESs and/or PES metrics are used as feedback into the system to steer the tape by moving one or more tape path guides until subsequently generated PESs or PES metrics have been optimized or have at least moved back into an acceptable range or to acceptable levels. The disclosed control system facilitates achieving increased stringencies on PES minimization that come with increased tape drive magnetic track densities.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: March 17, 2015
    Assignee: Oracle International Corporation
    Inventor: Daniel W. Underkofler
  • Publication number: 20150009792
    Abstract: A tape guide roller, for use with a tape drive that is configured to receive a length of tape, includes a roller body having an outer surface with one or more grooved areas and one or more non-grooved areas. The one or more grooved areas make up seventy-five percent or less of the outer surface, and the one or more non-grooved areas make up at least twenty-five percent of the outer surface. Furthermore, the one or more grooved areas are configured to affect traction between the roller body and the tape as the tape passes over the roller body.
    Type: Application
    Filed: July 3, 2013
    Publication date: January 8, 2015
    Inventors: Peter R. Coburn, Daniel W. Underkofler
  • Publication number: 20150009791
    Abstract: A tape guide is provided for use with a tape drive that is configured to receive a length of tape having a tape width. The tape guide includes a body having an outer surface for receiving the tape thereon, and flanges on opposite ends of the body. The flanges may be spaced apart by a distance that is 125 to 500 microns greater than the tape width.
    Type: Application
    Filed: July 3, 2013
    Publication date: January 8, 2015
    Inventors: Daniel W. Underkofler, William J. Vanderheyden
  • Publication number: 20140376126
    Abstract: A control system for a tape drive that uses position error signals (PESs) generated by a tape head assembly of the tape drive during longitudinal movement of a tape through the drive to dynamically adjust a lateral and/or angular position of tape to enhance tape drive performance (e.g., the ability of a tape head assembly to precisely follow one or more data and/or servo tracks on the tape). In one arrangement, the PESs and/or PES metrics are used as feedback into the system to steer the tape by moving one or more tape path guides until subsequently generated PESs or PES metrics have been optimized or have at least moved back into an acceptable range or to acceptable levels. The disclosed control system facilitates achieving increased stringencies on PES minimization that come with increased tape drive magnetic track densities.
    Type: Application
    Filed: September 10, 2014
    Publication date: December 25, 2014
    Inventor: Daniel W. Underkofler
  • Patent number: 8861121
    Abstract: A control system for a tape drive that uses position error signals (PESs) generated by a tape head assembly of the tape drive during longitudinal movement of a tape through the drive to dynamically adjust a lateral and/or angular position of tape to enhance tape drive performance (e.g., the ability of a tape head assembly to precisely follow one or more data and/or servo tracks on the tape). In one arrangement, the PESs and/or PES metrics are used as feedback into the system to steer the tape by moving one or more tape path guides until subsequently generated PESs or PES metrics have been optimized or have at least moved back into an acceptable range or to acceptable levels. The disclosed control system facilitates achieving increased stringencies on PES minimization that come with increased tape drive magnetic track densities.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: October 14, 2014
    Assignee: Oracle International Corporation
    Inventor: Daniel W. Underkofler
  • Publication number: 20140118856
    Abstract: A control system for a tape drive that uses position error signals (PESs) generated by a tape head assembly of the tape drive during longitudinal movement of a tape through the drive to dynamically adjust a lateral and/or angular position of tape to enhance tape drive performance (e.g., the ability of a tape head assembly to precisely follow one or more data and/or servo tracks on the tape). In one arrangement, the PESs and/or PES metrics are used as feedback into the system to steer the tape by moving one or more tape path guides until subsequently generated PESs or PES metrics have been optimized or have at least moved back into an acceptable range or to acceptable levels. The disclosed control system facilitates achieving increased stringencies on PES minimization that come with increased tape drive magnetic track densities.
    Type: Application
    Filed: October 25, 2012
    Publication date: May 1, 2014
    Applicant: ORACLE INTERNATIONAL CORPORATION
    Inventor: Daniel W. Underkofler
  • Publication number: 20140115614
    Abstract: A tape cartridge is provided with a reel mounted for rotation in a housing. Tape with a length, a width and a thickness, is wound upon the reel in a length direction of the tape. A leader is mounted to a free end of the tape. The leader has at least one portion with a width greater than the tape width to clean a tape path, such as a guide and/or a lens. Another tape cartridge is provided with a reel mounted for rotation in a housing. Tape is wound upon the reel in a length direction of the tape. A leader is mounted to a free end of the tape. A brush is mounted to a portion of the leader for cleaning a tape path.
    Type: Application
    Filed: December 20, 2013
    Publication date: April 24, 2014
    Applicant: Oracle International Corporation
    Inventors: Daniel W. Underkofler, Steven Suttle, Scott D. Wilson
  • Patent number: 8630065
    Abstract: A tape cartridge is provided with a reel mounted for rotation in a housing. Tape with a length, a width and a thickness, is wound upon the reel in a length direction of the tape. A leader is mounted to a free end of the tape. The leader has at least one portion with a width greater than the tape width to clean a tape path, such as a guide and/or a lens. Another tape cartridge is provided with a reel mounted for rotation in a housing. Tape is wound upon the reel in a length direction of the tape. A leader is mounted to a free end of the tape. A brush is mounted to a portion of the leader for cleaning a tape path.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: January 14, 2014
    Assignee: Oracle International Corporation
    Inventors: Daniel W. Underkofler, Steven Suttle, Scott D. Wilson
  • Publication number: 20140007145
    Abstract: A tape cartridge is provided with a reel mounted for rotation in a housing. Tape with a length, a width and a thickness, is wound upon the reel in a length direction of the tape. A leader is mounted to a free end of the tape. The leader has at least one portion with a width greater than the tape width to clean a tape path, such as a guide and/or a lens. Another tape cartridge is provided with a reel mounted for rotation in a housing. Tape is wound upon the reel in a length direction of the tape. A leader is mounted to a free end of the tape. A brush is mounted to a portion of the leader for cleaning a tape path.
    Type: Application
    Filed: June 28, 2012
    Publication date: January 2, 2014
    Applicant: ORACLE INTERNATIONAL CORPORATION
    Inventors: Daniel W. Underkofler, Steven Suttle, Scott D. Wilson
  • Publication number: 20070272791
    Abstract: A flange for a tape roller has a curved shape that substantially solves the problems with skewed tape while maintaining manufacturability. The tape edge makes contact with the tape flange where the slope of the curve shape is substantially flat. From the contact point of the tape and the flange, the flange shape gently curves away. The shape of the flange allows some degree of skew in the tape so that contact with the flange edge is avoided, and yet the distance between the two flanges of the roller is more easily controlled than with a roller having tapered edge flanges.
    Type: Application
    Filed: May 23, 2006
    Publication date: November 29, 2007
    Applicant: SUN MICROSYSTEMS, INC.
    Inventors: Daniel W. Underkofler, William J. Vanderheyden
  • Patent number: 6932295
    Abstract: A tape reel within a tape path is disclosed for storing a tape. The tape reel includes a first flange having an inner surface and an outer surface. The first flange is attached to a hub. The tape reel also includes a second flange attached to the hub. The second flange is substantially parallel to the first flange. The second flange has an inner surface and an outer surface. The inner surface of the second flange is tapered with respect to the axis of the hub. The reel is tilted with respect to a plane of the tape path so that the tapered inner surface is moved so that it is located in a plane that is horizontal to a plane of the tape path at the point of exit of the tape from the tape reel.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: August 23, 2005
    Assignee: Storage Technology Corporation
    Inventor: Daniel W. Underkofler
  • Patent number: 6786445
    Abstract: A spool system for packing tape on a hub. The spool has upper and lower flanges on the hub, and a flexure positioned on the hub between the two flanges. The flexure is normally parallel to the flanges, but when a force is applied to the tape lead-in edge of the flexure, that edge of the flexure is pressed toward one of the flanges. This causes the tape lead-in side of the spool system to have a wider opening than the tape packing side of the spool system. The width of the space on the tape packing side is preferably equal to or narrower than the width of the tape to be packed, so that the flexure presses against the edge of tape as it loads, reducing stagger of the tape.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: September 7, 2004
    Assignee: Storage Technology Corporation
    Inventors: Christian Allen Todd, Donovan Milo Janssen, Phillip Monroe Morgan, Daniel W. Underkofler
  • Patent number: 6621656
    Abstract: A tape drive includes a drive body and a tape guide supported by the drive body. The tape drive further includes a threading mechanism having a first member pivotally associated with the drive body, and a cleaning member supported by the first member and moveable therewith. The cleaning member is engageable with the tape guide so as to clean the tape guide.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: September 16, 2003
    Assignee: Storage Technology Corporation
    Inventors: Daniel W. Underkofler, Phillip M. Morgan
  • Patent number: 6497377
    Abstract: A tape drive for use with magnetic tape includes a drive body and a cleaning member supported by the drive body. The tape drive also includes a tape guide moveably associated with the drive body, such that the tape guide is moveable between a tape-unloaded position and a tape-loaded position. When the tape guide moves between the tape-unloaded position and the tape-loaded position, the tape guide engages the cleaning member such that the cleaning member may remove debris from the tape guide.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: December 24, 2002
    Assignee: Storage Technology Corporation
    Inventors: Daniel W. Underkofler, Roger H. Grow, William T. Veno, Phillip M. Morgan
  • Publication number: 20020145820
    Abstract: A tape drive includes a drive body and a tape guide supported by the drive body. The tape drive further includes a threading mechanism having a first member pivotally associated with the drive body, and a cleaning member supported by the first member and moveable therewith. The cleaning member is engageable with the tape guide so as to clean the tape guide.
    Type: Application
    Filed: April 5, 2001
    Publication date: October 10, 2002
    Applicant: Storage Technology Corporation
    Inventors: Daniel W. Underkofler, Phillip M. Morgan
  • Publication number: 20020063182
    Abstract: A tape drive for use with magnetic tape includes a drive body and a cleaning member supported by the drive body. The tape drive also includes a tape guide moveably associated with the drive body, such that the tape guide is moveable between a tape-unloaded position and a tape-loaded position. When the tape guide moves between the tape-unloaded position and the tape-loaded position, the tape guide engages the cleaning member such that the cleaning member may remove debris from the tape guide.
    Type: Application
    Filed: November 30, 2000
    Publication date: May 30, 2002
    Applicant: Storage Technology Corporation
    Inventors: Daniel W. Underkofler, Roger H. Grow, William T. Veno, Phillip M. Morgan
  • Patent number: 6068436
    Abstract: The pass thru mechanism for automated cartridge library systems serves to interconnect two juxtaposed operationally independent automated cartridge library systems and provides a simple apparatus that makes use of gravity to obviate the need for complex mechanical mechanisms to pass the media cartridge between the juxtaposed automated cartridge library systems. In particular, the pass thru mechanism comprises a media cartridge receiver that accepts a media cartridge from an automated cartridge library robot and then deposits the media cartridge in a media cartridge positioning mechanism. The media cartridge positioning mechanism uses gravity to tumble the media cartridge down a ramp into a media cartridge transport that delivers the media cartridge to the robot located in the juxtaposed media cartridge receiving automated cartridge library system.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: May 30, 2000
    Assignee: Storage Technology Corporation
    Inventors: David Christopher Black, Joseph Paul Manes, Timothy C. Ostwald, Daniel James Plutt, Daniel W. Underkofler