Modular Library System Patents (Class 369/30.39)
  • Patent number: 8908484
    Abstract: In a recording/reproducing device for recording and reproducing an optical disk, when performing verify processing of inspecting a quality of recorded data and compare processing of inspecting whether the recorded data can be read without errors, a time is taken because the same area needs to be reproduced two times. The verify processing and the compare processing are performed at one time reproduction. To perform the verify processing and the compare processing simultaneously, a recording quality storage part is provided in the recording/reproducing device, and reproduced data is transmitted to a host controller while storing quality information at the time of reproduction by an instruction of the host controller. The host controller performs the compare processing by comparing transmitted data and data at the time of recording and inspects the recording quality by acquiring the quality information of a reproduced area from the recording/reproducing device at intervals set in advance.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: December 9, 2014
    Assignee: Hitachi-LG Data Storage, Inc.
    Inventors: Tomomi Okamoto, Shinji Fujita, Takakiyo Yasukawa, Masayuki Kobayashi
  • Patent number: 8582400
    Abstract: A data library apparatus capable of changing the mounting positions of disks on the basis of information recorded in the disks and the access histories of the disks. Disks expected to be accessed next are mounted in advance on data recording/reproducing devices, on slots nearer to the data recording/reproducing devices, or on a disk carrying device, etc. In addition, disks relevant to currently active disks are mounted on positions so that the optical disk carrying device can bring out the relevant disks at a time without being moved, and hereby the time necessary for disk access in the data library apparatus can be reduced.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: November 12, 2013
    Assignees: Hitachi-LG Data Storage, Inc., Hitachi Consumer Electronics Co., Ltd.
    Inventor: Toshio Nishida
  • Patent number: 8374065
    Abstract: An apparatus, system, and method are disclosed for performing data library background operations. The present invention teaches one or more data storage drives capable of entering a phantom load mode and a library controller capable of initiating the phantom load mode for the data storage drives. The phantom load mode operates to hide the media status of the data storage drives from host computers during background operations involving the data storage drives. In certain embodiments, the data storage drives exit the phantom load mode as a result of a media unload request. In some embodiments, the library controller receives a media load request from a host computer during the background operation and completes the media load request upon completion of the background operation.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: February 12, 2013
    Assignee: International Business Machines Corporation
    Inventors: Brian Gerard Goodman, Leonard George Jesionowski
  • Patent number: 8031563
    Abstract: A library system includes a first library device that includes a first-drive for reading information from or writing information to a data storage medium and a first storage cell for storing the data storage medium, a second library device that includes a second drive for reading information from or writing information to the data storage medium and a second storage cell for storing the data storage medium, the second library device being positioned adjacent the first library device, and an elevator that transports the data storage medium between the first library device and the second library device, the elevator being positioned between the first library device and the second library device.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: October 4, 2011
    Assignee: NEC Corporation
    Inventor: Shinichi Iwata
  • Patent number: 7916423
    Abstract: A storage system is provided having at least one storage unit, the storage unit including an electrical power source, a communication source and a cover that defines, at least in part an interior space. The storage system operates with a media blade that comprises a plurality of data storage elements, said media blade moveable in a drawer like motion though a cooperating opening in said cover. The storage system further includes a motion accommodating conductor apparatus connecting said plurality of data storage elements to said electrical power source and said communication source such that power from said electrical power source and communication from said communication source may be provided to said media blade without interruption when said media blade is moved in said drawer like motion outward from at least partially within said interior space.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: March 29, 2011
    Assignee: Spectra Logic Corporation
    Inventors: Matthew Thomas Starr, Walter Wong, Micheal Edward Figero, Ronald Gregory Duren, Matthew John Ninesling, Joshua Daniel Carter, Scott Edward Bacom
  • Patent number: 7911731
    Abstract: A tape library system includes a plurality of conductive track assemblies including at least one linear conductive strip, and at least one guide track. The system further includes a first fiber brush assembly and a second fiber brush assembly separated from each other by a predetermined separation distance, each of the first and second fiber brush assemblies comprising a spring biasing a track wheel, and a fiber brush attached to the fiber brush assembly and in electrical contact with the conductive strip. The fiber brush assembly linearly translates along the conductive track assembly on an axis parallel to the conductive strip.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: March 22, 2011
    Assignee: International Business Machines Corporation
    Inventors: Shawn M. Nave, George G. Zamora, Lee C. Randall
  • Patent number: 7876525
    Abstract: An expandable storage library for storing digital storage media, such as storage tapes or disks is provided. The library includes a base unit and robotic system to which additional expansion units may be added. Several expansion units may be installed in the library with the base unit so that the robotic system can access media storage racks in any of the expansion units or in the base unit. Doors on the base unit and expansion unit may be interlocked together to function as a single door. A Z pole guide on the base unit may be extended by adding expansion guide poles that guide the movement of the robotic system through the library.
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: January 25, 2011
    Assignee: Oracle America, Inc.
    Inventors: Bradley A. Wilkin, Daniel J. Plutt, Joseph P. Manes, Donald R. Manes
  • Patent number: 7782565
    Abstract: Described herein is a mobile data storage magazine for interacting with a docking station. The magazine can include a magazine frame containing a plurality of operatively interconnected disk drives, a first contact element associated with the magazine frame capable of conducting electrical power to at least one of the plurality of disk drives when engaged with a second contact element associated with the docking station wherein the first and second contact elements are adapted to cooperate in a non male/female relationship. The magazine can further comprise a first communication element capable of conducting data between at least one of the plurality of disk drives and the docking station when the first communication element is operatively linked to a second communication element associated with the docking station.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: August 24, 2010
    Inventor: Matthew Thomas Starr
  • Patent number: 7768739
    Abstract: Described herein is a mobile data storage magazine for interacting with a docking station. The magazine can include a magazine frame containing a plurality of operatively interconnected disk drives, a first contact element associated with the magazine frame capable of conducting electrical power to at least one of the plurality of disk drives when engaged with a second contact element associated with the docking station wherein the first and second contact elements are adapted to cooperate in a non male/female relationship. The magazine can further comprise a first communication element capable of conducting data between at least one of the plurality of disk drives and the docking station when the first communication element is operatively linked to a second communication element associated with the docking station.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: August 3, 2010
    Inventors: Matthew Thomas Starr, Christian Cameron Curtis, Ray Dean Heineman
  • Patent number: 7719790
    Abstract: An operator alterable space is described, for use with a data storage library. The library has a frame substantially defines an interior environment and is exposed to an exterior environment. The operator alterable space is adapted to accommodate either a drive module that is capable of storing data to a magazine storage element or a shelf module capable of accommodating at least the magazine storage element whereby the magazine storage element can be disposed in the shelf module. The operator alterable space is accessible from the exterior environment for installing either the shelf module or the drive module via an opening in the frame. The operator alterable space is also accessible to a magazine transport from the interior environment, wherein the magazine transport is capable of moving the magazine storage element to the operator alterable space.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: May 18, 2010
    Assignee: Spectra Logic Corporation
    Inventors: Karl Martin Armagost, Edwin Jack Wadsworth, Neal Arthur Downey, Christian Cameron Curtis, Matthew Thomas Starr, Ray Dean Heineman
  • Patent number: 7515378
    Abstract: An expandable storage library for storing digital storage media, such as storage tapes or disks is provided. The library includes a base unit and robotic system to which additional expansion units may be added. Several expansion units may be installed in the library with the base unit so that the robotic system can access media storage racks in any of the expansion units or in the base unit. Doors on the base unit and expansion unit may be interlocked together to function as a single door. A Z pole guide on the base unit may be extended by adding expansion guide poles that guide the movement of the robotic system through the library.
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: April 7, 2009
    Assignee: Storage Technology Corporation
    Inventors: Bradley A. Wilkin, Daniel J. Plutt, Joseph P. Manes, Donald R. Manes
  • Patent number: 7499242
    Abstract: A data storage and retrieval device is provided which includes a tape drive for recording data on to and reading data from data cartridges, at least one storage magazine in which the data cartridges are stored, and a cartridge shuttle which moves the data cartridges between the tape drive and the storage locations and the storage magazine. The present data storage and retrieval device is housed with a housing that is configured to fit a standard form factor for computer network related devices, such as the “U” form factor. The data storage and retrieval device is scalable for different form factors by exchanging only a limited number of parts in the apparatus while retaining the majority of parts and components without change. For example, a change in U form factor may be accomplished by varying only a few components in an elevator portion of the cartridge shuttle and by providing a taller or shorter storage magazine in the housing.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: March 3, 2009
    Assignee: Tandberg Data ASA
    Inventor: Håvard Hoelsaeter
  • Patent number: 7444469
    Abstract: A controller of an automated data storage library is configured to store information regarding operation of the library in a memory; to reserve at least one data storage cartridge; and to operate a data storage drive and the memory to transfer at least a portion of the information stored in the memory to the reserved data storage cartridge. The library controller is configured to maintain an externally available inventory of data storage cartridges of the library, e.g. for a host system, and excludes the reserved data storage cartridge from the inventory.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: October 28, 2008
    Assignee: International Business Machines Corporation
    Inventors: Daniel Charles Estelle, Brian Gerard Goodman, Diana Joyce Hellman
  • Patent number: 7387485
    Abstract: Storage library systems and methods of operating and assembling library systems are provided. The storage library system may include a stationary support member having a first axis and a cartridge transport assembly. The cartridge transport assembly includes a cartridge retrieving mechanism configured to retrieve a removable media cartridge, said cartridge transport assembly being coupled to the support member, wherein the cartridge retrieving mechanism is positionable in four degrees of freedom. The method of operating a tape library may include transmitting instruction signals to a robotics controller disposed on a cartridge transport assembly, translating the cartridge transport assembly along a stationary support member, and positioning the cartridge retrieving mechanism in four degrees of freedom relative to the stationary support member.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: June 17, 2008
    Assignee: Quantum Corporation
    Inventors: Peter Dickey, Raoul Standt, John Edward Maroney
  • Patent number: 7386667
    Abstract: A controller of an automated data storage library is configured to store information regarding operation of the library in a memory; to reserve at least one data storage cartridge; and to operate a data storage drive and the memory to transfer at least a portion of the information stored in the memory to the reserved data storage cartridge. The library controller is configured to maintain an externally available inventory of data storage cartridges of the library, e.g. for a host system, and excludes the reserved data storage cartridge from the inventory.
    Type: Grant
    Filed: November 9, 2005
    Date of Patent: June 10, 2008
    Assignee: International Business Machines Corporation
    Inventors: Daniel Charles Estelle, Brian Gerard Goodman, Diana Joyce Hellman
  • Patent number: 7328285
    Abstract: A method to write information to a designated information storage medium using an allocated data storage device using a specified information recording format, whereby a previously-determined media bit for the designated information storage medium is examined, and a previously-determined device bit for the allocated data storage device is examined, and the write capability of the designated information storage medium using the specified information recording format is determined and displayed. Management classes embedded in the file name may augment the media bit and device bit for determining the write capability.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: February 5, 2008
    Assignee: International Business Machines Corporation
    Inventors: Susan Encinas, Daniel James Winarski
  • Patent number: 7272081
    Abstract: Methods, system and computer program product are provided for managing and tracking on-demand removable, serialized data resources, such as storage frames, storage drives and media, in an automated data storage library. Storage frames, data storage drives and media are tracked by the automated data storage library to prevent use or misappropriation until authorized. Alternatively, or additionally, the data storage drives may be prevented from being used until instructed to do so. In addition, the media may be prevented from being used until modification is made to the medium or cartridge memory of the data storage media.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: September 18, 2007
    Assignee: International Business Machines Corporation
    Inventors: Brian G. Goodman, Leonard G. Jesionowski
  • Patent number: 7230791
    Abstract: The capacity of a rack-mounted storage library having a media element handling assembly is expanded by mounting a panel segment to a rack side such that the panel segment faces the rack interior. At least one of media element housing cells and a media player are supported on the panel segment such that the cells and the player face the rack interior. The library capacity is increased by mounting another panel segment having cells or a player to another rack side. The panel segments are mounted to the rack sides independent of one another or are connected together prior to being mounted to the rack sides. The handling assembly moves through the rack interior to load media elements held by cells into a player. The panel segments may be mounted to the rack sides at the same or different rack length positions.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: June 12, 2007
    Assignee: Storage Technology Corporation
    Inventors: Timothy C. Ostwald, Joseph Paul Manes, Daniel J. Plutt, Jon Benson
  • Patent number: 7221536
    Abstract: A combined media holder and storage device including an outer frame section and an inner media support section. The outer frame section is adapted to be removably mounted to a media library. The media library includes a drive to read and write information on media, a mover to move the media to and from the drive, and a plurality of magazine receiving areas. The outer frame section is adapted to be removably inserted into one of the magazine receiving areas. The inner media support section includes a plurality of media receiving areas adapted to receive and separately individually support a plurality of pieces of recording media. The combined media holder and storage device has a substantially open front end and is closed except at the substantially open front end. The outer frame section is adapted to receive a cover for closing the substantially open front end.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: May 22, 2007
    Assignee: International Business Machines Corporation
    Inventors: Aaron R. Cox, Krista E. Nunn, Robin D. Roberts, Joni E. Saylor
  • Patent number: 7100173
    Abstract: In a library apparatus, a vertical rail is fixed on a cover member so that a storage medium input-output machine disposed inside the library apparatus moves in a vertical direction, and a horizontal rail moves along the vertical rail in the vertical direction so that the storage medium input-output machine moves in a horizontal direction. Thus, storage media can move between storage medium storing shelves and a drive. The horizontal rail is provided with a mounting section.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: August 29, 2006
    Assignee: Fujitsu Limited
    Inventor: Akira Takano
  • Patent number: 7080388
    Abstract: The present invention provides removable-unit storage modules, which can be combined into a network. The storage modules comprise storage cells arranged in a rule based structured configuration, and robotic hands to which move along tracks in order to retrieve objects from the storage cells. In one embodiment, the storage cells are used to contain data storage units. Several modules can be combined into a network by means of bridge tracks which connect the tracks of different modules, allowing the robotic hands to move between modules. The bridge tracks can be dynamically connected and disconnected from the modules, allowing the network configuration to change according to user needs. The individual modules are mobile and can be transported to other locations and connected with other removable-unit storage networks.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: July 18, 2006
    Assignee: Storage Technology Corporation
    Inventors: Frank T. Smith, Charles Allen Milligan
  • Patent number: 7047106
    Abstract: In a mass storage library, a module storage array includes a back plate having “T” shaped apertures patterned to form a cartridge storage together with cell blocks that have “T” shaped protrusions to fit into the openings in the back plate. A column of cell blocks are held in place between a shelf and a spring load. Interlocking surfaces molded into the cell blocks assist in holding the column of cell blocks in place with the “T” shaped protrusions and openings in the back plate. The cell blocks are stacked on the shelf with the “T” shaped protrusions inserted into the openings in the back plate and their mating surfaces interlocked. The spring load clamps the cell against the shelf. The cell blocks form cavities that hold the cartridges in the storage array. A plurality of columns of cell blocks provide the complete storage array. Calibration targets are provided to align the cell blocks to the library accessor and reader.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: May 16, 2006
    Assignee: International Business Machines Corporation
    Inventors: David John Butka, Steven Lloyd Felde, Raymond Yardy
  • Patent number: 6983469
    Abstract: A modular data storage system is disclosed. The data storage system comprises at least one module housing. Each housing has a front chamber and a rear chamber running parallel to a front side of the module housing and extending across a width of the module housing. An open shaft is arranged between the front chamber and the rear chamber. The shaft extends across the width of the module housing. The front chamber is adapted to receive at least two storage modules adapted to hold storage media, and the rear chamber is adapted to receive at least one function module for the data storage media. At least one transfer unit is arranged in the shaft. The transfer unit has a vertically traveling elevator and a carriage adapted to travel on the elevator between the front chamber and the rear chamber. The carriage has a grip mechanism for the data storage media.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: January 3, 2006
    Assignee: BDT Buro-und Datentechnik GmbH & CO KG
    Inventor: Friedhelm Steinhilber
  • Patent number: 6956715
    Abstract: A high-density media storage system. One embodiment of the high-density media storage system may comprises a plurality of storage libraries, each configured to store data cartridges in a horizontal orientation in high-density relation to one another. Such system also comprises a cartridge-handling apparatus having a drive assembly, the drive assembly moving the cartridge-handling apparatus through a displacement path through the plurality of storage libraries. The system further comprises an operational envelope provided at one end of the displacement path in one of the plurality of storage libraries, the operational envelope sized to receive only the drive assembly of the cartridge-handling apparatus when the cartridge-handling apparatus is positioned at the one end of the displacement path.
    Type: Grant
    Filed: March 17, 2003
    Date of Patent: October 18, 2005
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Robert L. Mueller, Paul C. Coffin, Gregg S. Schmidtke
  • Patent number: 6865053
    Abstract: A cleaning system for cleaning a picker in an automated media library includes a removable cleaning cartridge. The cleaning cartridge contains cleaning tape that is automatically advanced. The cleaning cartridge has a window through which access to the cleaning tape is provided. The picker has rollers that must be periodically cleaned of debris. The picker is aligned with a designated cleaning bin and one of the rollers is placed in contact with the cleaning tape. The roller then wipes against the cleaning tape. After the roller is cleaned, the cleaning tape advances so that a clean, unused portion of the cleaning tape is available through the window. The cleaning cartridge is extracted from the bin so that another roller can be cleaned. After each roller is cleaned, the cleaning cartridge is returned to the bin, and the picker returns to picking and placing media cartridges until another cleaning operation is required.
    Type: Grant
    Filed: January 13, 2003
    Date of Patent: March 8, 2005
    Assignee: International Business Machines Corporation
    Inventors: Erik E. Bengds, Kamal Emile Dimitri, Jerry Walter Hammar, Wayne Alan McKinley
  • Patent number: 6808353
    Abstract: A method for scaling a media storage library is provided, wherein the library comprises a plurality of media storage cells and at least one media picker robot. The method comprises connecting a new physical component to a section of the library. Examples of new components include additional robots, storage cell arrays, media players, as well as connecting a second adjacent library by means of a pass-through mechanism. Control software integrates this new physical component into the function of the library by auditing the content and function of the new component. During the connection and functional integration of the new component, the rest of the library continues its current operations. The method may further comprise defining at least one work zone within the library, wherein robots do not enter the work zone but continue to operate in other areas of the library.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: October 26, 2004
    Assignee: Storage Technology Corporation
    Inventors: Timothy C. Ostwald, Daniel James Plutt
  • Publication number: 20040184364
    Abstract: A high-density media storage system. One embodiment of the high-density media storage system may comprises a plurality of storage libraries, each configured to store data cartridges in a horizontal orientation in high-density relation to one another. Such system also comprises a cartridge-handling apparatus having a drive assembly, the drive assembly moving the cartridge-handling apparatus through a displacement path through the plurality of storage libraries. The system further comprises an operational envelope provided at one end of the displacement path in one of the plurality of storage libraries, the operational envelope sized to receive only the drive assembly of the cartridge-handling apparatus when the cartridge-handling apparatus is positioned at the one end of the displacement path.
    Type: Application
    Filed: March 17, 2003
    Publication date: September 23, 2004
    Inventors: Robert L. Mueller, Paul C. Coffin, Gregg S. Schmidtke
  • Patent number: 6772272
    Abstract: A method to write information to a designated information storage medium using an allocated data storage device using a specified information recording format, whereby a previously-determined media bit for the designated information storage medium is examined, and a previously-determined device bit for the allocated data storage device is examined, and the write capability of the designated information storage medium using the specified information recording format is determined.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: August 3, 2004
    Assignee: International Business Machines Corporation
    Inventors: Susan Encinas, Daniel James Winarski
  • Patent number: 6621655
    Abstract: A data storage system comprising: a plurality of vertically stacked modular housing units, each modular housing unit comprising a plurality of data storage media receiving devices; a data storage media handling device adapted to laterally displace media between the media receiving devices; a vertical lift mechanism attached to the data storage media handling device and adapted to vertically displace the handling device along a vertical displacement path extending adjacent to the vertically stacked modular housing units and comprising a drive assembly fixedly positioned with respect to the modular housing units and a linkage mechanism connected between the drive assembly and the handling device.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: September 16, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Joseph M White, Matthias A Lester
  • Patent number: 6570734
    Abstract: The automated library system contains multiple independent robots for concurrently manipulating multiple media cartridges. The library system comprises a two-dimensional array that contains media cartridge storage cells and media cartridge players. A system of rails is used to guide robotic pods through all of the locations in the array, which eliminates the need for any steering or guide mechanism on board the robotic pods, resulting in a reduction in the mass of the robotic pods. The rail system also constrains the movement of the robotic pods into horizontal and vertical movements, thereby simplifying the control algorithms for collision avoidance that are required by a typical random moveable object handling system based on horizontal, vertical and diagonal degrees of freedom. The robotic pods contain a moveable carriage that is capable of transporting robotic components, such as media cartridge pickers, bar code reading devices, and other task oriented sub-modules, in the storage library rail system.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: May 27, 2003
    Assignee: Storage Technology Corporation
    Inventors: Timothy C. Ostwald, Daniel James Plutt
  • Patent number: 6515822
    Abstract: A data storage system comprising: a plurality of vertically stacked modular housing units, each modular housing unit comprising a plurality of data storage media receiving devices; a data storage media handling device adapted to laterally displace media between the media receiving devices; a vertical lift mechanism attached to the data storage media handling device and adapted to vertically displace the handling device along a vertical displacement path extending adjacent to the vertically stacked modular housing units and comprising a drive assembly fixedly positioned with respect to the modular housing units and a linkage mechanism connected between the drive assembly and the handling device.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: February 4, 2003
    Assignee: Hewlett-Packard Company
    Inventors: Joseph M White, Matthias A Lester
  • Publication number: 20020181341
    Abstract: A modular data storage system is disclosed. The data storage system comprises at least one module housing. Each housing has a front chamber and a rear chamber running parallel to a front side of the module housing and extending across a width of the module housing. An open shaft is arranged between the front chamber and the rear chamber. The shaft extends across the width of the module housing. The front chamber is adapted to receive at least two storage modules adapted to hold storage media, and the rear chamber is adapted to receive at least one function module for the data storage media. At least one transfer unit is arranged in the shaft. The transfer unit has a vertically traveling elevator and a carriage adapted to travel on the elevator between the front chamber and the rear chamber. The carriage has a grip mechanism for the data storage media.
    Type: Application
    Filed: February 20, 2002
    Publication date: December 5, 2002
    Applicant: BDT Buro-und DATENTECHNIK GmbH & Co KG
    Inventor: Friedhelm Steinhilber
  • Patent number: 6452894
    Abstract: The present invention provides a recording media library apparatus that includes an inversion unit for inverting a desired or designated recording medium of the double-side recording type so as to correspond to a predetermined driving direction of a drive unit. The inversion unit is installed in any one of multiple of predetermined installing areas separate from a transport mechanism within the library apparatus. By the inversion unit performing necessary inversion of the double-side recording type medium, the same transport mechanism can be used for recording media of both the double-side recording type and the single-side recording type.
    Type: Grant
    Filed: July 20, 1999
    Date of Patent: September 17, 2002
    Assignee: Hitachi Electronics Engineering Co., Ltd.
    Inventors: Hiroyuki Suzuki, Katsumasa Yokoyama