| Patent Number |
Title Of Patent |
Date Issued |
| D527009 |
Digital video disk |
August 22, 2006 |
|
| D526652 |
Digital video disk |
August 15, 2006 |
|
| D525628 |
Digital video disk |
July 25, 2006 |
|
| D442605 |
Extended tape cartridge |
May 22, 2001 |
|
| D393454 |
Tape cartridge |
April 14, 1998 |
|
| D379638 |
Extended tape cartridge |
June 3, 1997 |
|
| D304720 |
Disk cartridge |
November 21, 1989 |
|
| D256912 |
Miniature tape cartridge |
September 16, 1980 |
|
| 6390402 |
Tape cartridge having lockout features |
May 21, 2002 |
| A tape cartridge has a front face sized for compatibility with an industry standard tape drive, and has sides longer than the sides of some industry standard cartridges. The sides and top of the housing extend outwardly in width to form a back portion of the cartridge that is wider than |
| 6227029 |
Method of manufacturing belt-driven tape cartridge |
May 8, 2001 |
| Base plates for magnetic data tape cartridges, are initially formed from roll stock of sheet material and are processed to form apertures to receive press-fitting tape guides and pins. The base plates are stacked in orientations that inhibit alignment of apertures, and the stack of base |
| 6207252 |
Magnetic recording medium and production method thereof |
March 27, 2001 |
| A magnetic recording medium is formed on a non-magnetic support and a magnetic layer containing a binder and a ferromagnetic powder and having a thickness of 0.7 .mu.m or thinner is formed on the non-magnetic support wherein the surface roughness Ra of the surface of the medium is from 0 |
| 6162528 |
Magnetic recording medium and method for manufacturing the same |
December 19, 2000 |
| A magnetic recording medium including a nonmagnetic support, a lower nonmagnetic layer, and an upper magnetic layer. The nonmagnetic support has a surface. The lower nonmagnetic layer is provided on the surface of the nonmagnetic support. The lower nonmagnetic layer is formed by coating |
| 6129301 |
Molded roller for tape cartridge |
October 10, 2000 |
| A drive roller for a belt-driven tape cartridge is molded of composite polymeric material in a single step to include outer segment and inner segment integrally formed together with a radial web segment between the outer and inner segments to provide highly concentric operating surfaces |
| 6068207 |
Tape cartridge having roller sets with substantially equal geometries |
May 30, 2000 |
| A tape cartridge has a front face sized for compatibility with an industry standard tape drive, and has sides longer than the sides of some industry standard cartridges. The sides and top of the housing extend outwardly in width to form a back portion of the cartridge that is wider than |
| 6045079 |
Tape cartridge having a large door and pivotally mounted write protect arm |
April 4, 2000 |
| A tape cartridge has a front face sized for compatibility with an industry standard tape drive, and has sides longer than the sides of some industry standard cartridges. The sides and top of the housing extend outwardly in width to form a back portion of the cartridge that is wider than |
| 6033759 |
Magnetic recording medium |
March 7, 2000 |
| A tape-shaped magnetic recording medium for executing recording/reproducing processes at a running speed 2m/sec or higher is capable of exhibiting an excellent running characteristic and making it hard to cause print-through as well. This magnetic recording medium comprises a non-magneti |
| 6032895 |
Collared hub pin for a tape cartridge |
March 7, 2000 |
| A tape cartridge has a baseplate surrounded by a housing. Two hub pins are disposed within the housing substantially perpendicular to the baseplate. Each pin has top and bottom portions and a collared portion therebetween. The bottom portion of each pin is press-fitted into a mating aper |
| 5996922 |
Belt-driven recording tape cartridge and roller for the same |
December 7, 1999 |
| A tape cartridge including a base plate, first and second tape reels, a magnetic recording tape, a driving belt, and a roller. The magnetic recording tape winds around the first and second tape reels. The driving belt moves the magnetic recording tape. The roller is provided on the base |
| 5963403 |
Belt driven tape cartridge |
October 5, 1999 |
| Disclosed is a belt driven tape cartridge capable of recording data at a higher density and a higher speed than in the conventional belt driven tape cartridges. The belt driven tape cartridge includes a flexible non-magnetic support, a magnetic recording layer formed on one surface of |
| 5961905 |
Method of molding unitary roller of homogeneous material for tape cartridge |
October 5, 1999 |
| A drive roller for a belt-driven tape cartridge is molded of composite polymeric material in a single step to include outer segment and inner segment integrally formed together with a radial web segment between the outer and inner segments to provide highly concentric operating surfaces |
| 5948522 |
Magnetic recording medium |
September 7, 1999 |
| The present invention provides a magnetic recording medium having excellent durability under severe environment. The magnetic recording medium is provided with a flexible non-magnetic support, and a magnetic layer which is provided thereon and contains ferromagnetic powder and bonding ag |
| 5758836 |
Tape cartridge and method of making the same |
June 2, 1998 |
| A data tape cartridge is formed on a baseplate of polymeric material which supports mounting pins and tape guides thereon for supporting tape components in rigid and dimensionally-stable manner using integrally formed bosses to support the mounting pins and guides. Additional stabili |
| 5542593 |
Tape guides for magnetic tape equipment |
August 6, 1996 |
| A tape guide for operation in contact with the back side of magnetic tape exhibits an increase in the coefficient of friction between the tape guide and the tape with increased wear of the guide surface associated with repeated passes of tape in sliding engagement over the tape contactin |
| 5539600 |
Write protection for memory diskettes |
July 23, 1996 |
| A slide component is configured to be inserted into a recess in an assembled magnetic diskette cartridge and rotated about an edge of the slide component into operable orientation to be slideably positioned between locations in the recess that designate whether or not the magnetic di |
| 5522562 |
Tape cartridge and method of making the same |
June 4, 1996 |
| A data tape cartridge is formed on a baseplate of polymeric material which supports mounting pins and tape guides thereon for supporting tape components in rigid and dimensionally-stable manner using integrally formed bosses to support the mounting pins and guides. Additional stabili |
| 5333806 |
Magnetic tape cartridge |
August 2, 1994 |
| A data tape cartridge is formed on a baseplate of polymeric material which supports mounting pins and tape guides thereon for supporting tape components in rigid and dimensionally-stable manner using integrally formed bosses to support the mounting pins and guides. Additional stabili |
| 5322585 |
Method and apparatus for making tape cartridges |
June 21, 1994 |
| A data tape cartridge is formed on a baseplate of polymeric material which supports mounting pins and tape guides thereon for supporting tape components in rigid and dimensionally-stable manner using integrally formed bosses to support the mounting pins and guides. Additional stabili |
| 5299086 |
Low stiffness spring for drag induction and component retention in computer data cartridges |
March 29, 1994 |
| A multi-armed spring in a data tape cartridge is formed from a planar sheet of resilient material and is shaped and mounted to maintain loose components in place during assembly, and to press tape hubs and belt rollers toward a base portion of the cartridge, thereby to provide tension |
| 5293294 |
Shutter for disk-based memory medium housing and method of fabrication |
March 8, 1994 |
| A shutter for use on a housing of a disk-based memory medium is formed of aluminum alloy sheet stock that is bent to form a spine with integral side legs or aprons. A surface-hardening coating is formed on both legs near the spine to increase the wear resistance of the shutter in the are |
| 5210671 |
Write protection for memory diskettes |
May 11, 1993 |
| A slide component is configured to be inserted into a recess in an assembled magnetic diskette cartridge and rotated into operable orientation to be slideably positioned between locations in the recess that designate whether or not the magnetic disk in the cartridge is write-protecte |
| 5081555 |
Internal tape cleaning mechanism for a tape cassette |
January 14, 1992 |
| A magnetic tape cassette having a pair of spaced-apart reels rotatably mounted on a support wall. A length of tape has its opposite ends secured respectively to the two reels and its intermediate portion wound around the reels to form corresponding tape rolls whose diameters vary inverse |
| 4929067 |
Method and apparatus for anamorphically shaping and deflecting electromagnetic beams |
May 29, 1990 |
| A method and apparatus for anamorphically shaping a beam of radiation and for deflecting such beam by 90.degree.. The apparatus consists of a prism having at least four faces, two of such faces being parallel. The prism is arranged to receive a beam at the Brewster angle .THETA..sub.B, a |
| 4839752 |
Temperature/humidity floppy disk cassette defeat mechanism |
June 13, 1989 |
| A defeat mechanism serves to prevent a floppy disk cassette from being operatively loaded into a drive mechanism when the cassette has been subjected to either a high-moisture or a high-temperature condition--either environment being potentially harmful to the recording capability of |
| 4823210 |
Copy protected disk |
April 18, 1989 |
| A copy protected magnetic storage disk includes a plurality of record tracks suitable for recording information-bearing data accompanied by a clock signal having a signal strength corresponding to the signal strength of the data. At least one of the record tracks includes a recording |
| 4785370 |
Disk brake mechanism for a disk cartridge |
November 15, 1988 |
| A disk cartridge comprises top and bottom opposed spaced-apart plates defining a compartment in which an information recording disk is rotatable. A front peripheral wall joins the top and bottom plates with an aperture in the front peripheral wall communicating with the compartment. |
| 4779159 |
Shutter latch mechanism for a disk cartridge |
October 18, 1988 |
| A disk cartridge comprises top and bottom plates having integral peripheral lips joined together to form a peripheral wall when the top and bottom plates are secured together. The peripheral wall serves to space the lower surface of the top plate from the upper surface of the bottom plat |
| 4737876 |
Write protect device for a record disk assembly |
April 12, 1988 |
| A magnetic record disk assembly includes a floppy disk located within a rigid case having integral case stiffeners, wiping force appliers and floppy disk stabilizers. Wipers made of fabric, cleaning material are located within the case and disk flexure creates frictional force between |
| 4695982 |
Hub hole characterization system |
September 22, 1987 |
| A method and apparatus for characterizing a central circular aperture of a workpiece, for example a flexible information storage disk. The apparatus utilizes a noncontact sensor system having a rotary stage upon which the workpiece is placed. A reference edge extending approximately to t |
| 4689254 |
Magnetic recording element having a lubricative and protective coating |
August 25, 1987 |
| A magnetic recording element comprised of a substrate having a magnetic recording layer disposed thereon is provided with a smooth uniform transparent lubricative and protective coating. The coating, which is composed of a telomer of tetrafluoroethylene, overlies the magnetic recordi |
| 4686470 |
Magnetic disk for measuring the azimuth of a transducer head |
August 11, 1987 |
| A magnetic disk includes a pair of azimuth test tracks of relatively narrow trackwise width located adjacent each other so that a magnetic head, the azimuth of which is to be measured, straddles both tracks at the same time. Each test track includes a recording pattern comprising a serie |
| 4648002 |
Wiping system for magnetic recording disks |
March 3, 1987 |
| A protective jacket for permanently containing a floppy-type magnetic recording disk includes a liner attached to at least one of the interior sidewalls of the jacket in a manner whereby a protruding warp is formed in the liner having the form of an elongated ridge. The warp protrudes fa |
| 4626949 |
Magnetic record disk cleaning and stabilizing assembly |
December 2, 1986 |
| A magnetic record disk assembly includes a floppy disk located within a rigid case having integral case stiffeners, wiping force appliers and floppy disk stabilizers. Wipers made of fabric, cleaning material are located within the case and disk flexure creates frictional force between |
| 4609963 |
Spindle aperture reinforcement for a floppy disk |
September 2, 1986 |
| An improved reinforcement member for a central aperture in a flexible recording disk and a method for forming the same. The improved reinforcement comprises an integral, annular-shaped ring formed on one or both sides of the flexible recording disk about the central aperture thereof. |
| 4608618 |
Digital alignment diagnostic disk |
August 26, 1986 |
| An alignment disk including data tracks written in a spiral configuration, through the use of microstepping techniques, to accurately test a variety of transducer head parameters including head alignment, resolution and offset. The tracks include standard spiral tracks, S-shaped clamping |
| 4599667 |
Automatic azimuth angle adjustment head mounting structure |
July 8, 1986 |
| Apparatus for automatically adjusting the azimuth angle of a transducer head relative to a media recording surface when the transducer head is driven in a non-radial path about the media recording surface with a transducer head supported by a positioning support shaft located within a |
| 4562505 |
Flexible magnetic memory disk with metallic hub and method of manufacturing same |
December 31, 1985 |
| A disk has a central aperture and a metallic hub has an annular flange abuting one side of the disk. A boss projects from the annular flange through the central aperture. A retainer ring fits about the boss and abuts the side of the disk opposite from the annular flange. A plurality |
| 4562495 |
Multiple system disk |
December 31, 1985 |
| A multiple system data storage disk adapted for use with more than one type of computer. The disk is specially formatted to include software for each computer. The disk includes four discrete recognition headers, one for each target computer, placed at locations on the disk where each co |
| 4562494 |
Disk drive alignment analyzer |
December 31, 1985 |
| An alignment testing device comprising a magnetic media with data tracks in nonstandard locations with bidirectionally progressive degrees of misalignment for testing the alignment of the transducer head in a magnetic storage device such as a floppy disk drive. The alignment testing |
| 4557604 |
Floppy disk transmissivity meter |
December 10, 1985 |
| A meter for measuring the transmissivity of a floppy disk including an oscillator for generating a sinusoidal signal, a driver and an LED, biased on by the driver and modulated by the driver responsive to the sinusoidal signal, the LED for illuminating a portion of a surface of the disk. |
| 4554217 |
Process for creating wear and corrosion resistant film for magnetic recording media |
November 19, 1985 |
| A process for forming a magnetic recording member composed of a substrate, a magnetic film, and a protective layer. The magnetic film is deposited on the substrate by means of DC or RF sputtering and electron beam vacuum deposition in a partial pressure of inert gas. During the final min |
