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: 9135943Abstract: 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: GrantFiled: July 3, 2013Date of Patent: September 15, 2015Assignee: ORACLE INTERNATIONAL CORPORATIONInventors: Daniel W. Underkofler, William J. Vanderheyden
-
Patent number: 9042055Abstract: 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: GrantFiled: July 3, 2013Date of Patent: May 26, 2015Assignee: ORACLE INTERNATIONAL CORPORATIONInventors: Peter R. Coburn, Daniel W. Underkofler
-
Closed loop control of tape media positioning within tape drive using position error signal feedback
Patent number: 8982493Abstract: 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: GrantFiled: September 10, 2014Date of Patent: March 17, 2015Assignee: Oracle International CorporationInventor: Daniel W. Underkofler -
Publication number: 20150009792Abstract: 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: ApplicationFiled: July 3, 2013Publication date: January 8, 2015Inventors: Peter R. Coburn, Daniel W. Underkofler
-
Publication number: 20150009791Abstract: 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: ApplicationFiled: July 3, 2013Publication date: January 8, 2015Inventors: Daniel W. Underkofler, William J. Vanderheyden
-
CLOSED LOOP CONTROL OF TAPE MEDIA POSITIONING WITHIN TAPE DRIVE USING POSITION ERROR SIGNAL FEEDBACK
Publication number: 20140376126Abstract: 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: ApplicationFiled: September 10, 2014Publication date: December 25, 2014Inventor: Daniel W. Underkofler -
Closed loop control of tape media positioning within tape drive using position error signal feedback
Patent number: 8861121Abstract: 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: GrantFiled: October 25, 2012Date of Patent: October 14, 2014Assignee: Oracle International CorporationInventor: Daniel W. Underkofler -
CLOSED LOOP CONTROL OF TAPE MEDIA POSITIONING WITHIN TAPE DRIVE USING POSITION ERROR SIGNAL FEEDBACK
Publication number: 20140118856Abstract: 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: ApplicationFiled: October 25, 2012Publication date: May 1, 2014Applicant: ORACLE INTERNATIONAL CORPORATIONInventor: Daniel W. Underkofler -
Publication number: 20140115614Abstract: 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: ApplicationFiled: December 20, 2013Publication date: April 24, 2014Applicant: Oracle International CorporationInventors: Daniel W. Underkofler, Steven Suttle, Scott D. Wilson
-
Patent number: 8630065Abstract: 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: GrantFiled: June 28, 2012Date of Patent: January 14, 2014Assignee: Oracle International CorporationInventors: Daniel W. Underkofler, Steven Suttle, Scott D. Wilson
-
Publication number: 20140007145Abstract: 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: ApplicationFiled: June 28, 2012Publication date: January 2, 2014Applicant: ORACLE INTERNATIONAL CORPORATIONInventors: Daniel W. Underkofler, Steven Suttle, Scott D. Wilson
-
Publication number: 20070272791Abstract: 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: ApplicationFiled: May 23, 2006Publication date: November 29, 2007Applicant: SUN MICROSYSTEMS, INC.Inventors: Daniel W. Underkofler, William J. Vanderheyden
-
Patent number: 6932295Abstract: 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: GrantFiled: March 24, 2003Date of Patent: August 23, 2005Assignee: Storage Technology CorporationInventor: Daniel W. Underkofler
-
Patent number: 6786445Abstract: 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: GrantFiled: April 2, 2002Date of Patent: September 7, 2004Assignee: Storage Technology CorporationInventors: Christian Allen Todd, Donovan Milo Janssen, Phillip Monroe Morgan, Daniel W. Underkofler
-
Patent number: 6621656Abstract: 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: GrantFiled: April 5, 2001Date of Patent: September 16, 2003Assignee: Storage Technology CorporationInventors: Daniel W. Underkofler, Phillip M. Morgan
-
Patent number: 6497377Abstract: 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: GrantFiled: November 30, 2000Date of Patent: December 24, 2002Assignee: Storage Technology CorporationInventors: Daniel W. Underkofler, Roger H. Grow, William T. Veno, Phillip M. Morgan
-
Publication number: 20020145820Abstract: 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: ApplicationFiled: April 5, 2001Publication date: October 10, 2002Applicant: Storage Technology CorporationInventors: Daniel W. Underkofler, Phillip M. Morgan
-
Publication number: 20020063182Abstract: 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: ApplicationFiled: November 30, 2000Publication date: May 30, 2002Applicant: Storage Technology CorporationInventors: Daniel W. Underkofler, Roger H. Grow, William T. Veno, Phillip M. Morgan
-
Patent number: 6068436Abstract: 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: GrantFiled: June 24, 1998Date of Patent: May 30, 2000Assignee: Storage Technology CorporationInventors: David Christopher Black, Joseph Paul Manes, Timothy C. Ostwald, Daniel James Plutt, Daniel W. Underkofler