Patent application number | Description | Published |
20110102927 | MULTILEVEL PULSE POSITION MODULATION FOR EFFICIENT ENCODING OF INFORMATION INTO SERVO PATTERNS - A storage medium on which servo patterns are encoded to provide lateral and longitudinal position (LPOS) information is provided. Each of the servo patterns includes a servo frame, including first through fourth bursts, which are each independently modulated with multi-level pulse position modulation (PPM) to encode at least one independent bit per burst. | 05-05-2011 |
20130321949 | SERVO CONTROL - A tape head includes a set of one or more segments, wherein each segment of the set is individually movable with respect to a frame; each segment of the set comprising at least one of a write element configured to write data to a tape and a read element configured to read data from the tape; and each segment of the set comprising a further read element having a width transverse to a motion direction of the tape being at least a width of the write element of the segment or, in the event that no write element is comprised in the segment, of a write element of a different segment. | 12-05-2013 |
20130321953 | WRITE HEAD AND APPARATUS - A write head comprising a yoke having at least a first and a second gap and a coil for producing a magnetic field at each gap, the coil comprising a plurality of windings, wherein the windings are arranged so as to produce the same magnetic field strength at each gap and/or along each gap by use of a proximity effect between the windings and a respective gap. | 12-05-2013 |
20140002923 | MAGNETIC TAPE MEDIUM | 01-02-2014 |
20140002928 | TAPE HEAD SYSTEM AND METHOD FOR OPERATING A TAPE HEAD SYSTEM | 01-02-2014 |
20140204483 | SERVO CONTROL - In a method for operating a tape storage system, while a tape is being moved in a tape drive across a tape head for one or more of reading and writing user data from/to a data track of the tape, a read element of the tape head, which read element is assigned to the data track, is moved transverse to a moving direction of the tape for a distance of more than a width of the data track. A transverse position of one or more of the following elements is subject to a signal supplied by the read element during its transverse move: The read element; another read element assigned to the data track; and a write element assigned to the data track. | 07-24-2014 |
20150049399 | VIBRATION CONTROL IN DATA STORAGE DEVICES - A storage device has a device body and a read/write head for reading and writing data in a data track of a storage medium. An actuator system is mounted on the device body for effecting movement of the read/write head relative to the data track to align the head with the data track. The actuator system has a plurality of degrees of freedom, and a controller controls the actuator system to effect the movement. A body vibration sensor provided on the device body generates a signal indicative of vibration of the body. An actuator vibration sensor generates a signal indicative of vibration of the actuator system. The controller is adapted to process the signals from the sensors to derive a coupling signal indicative of vibration coupling between the degrees of freedom, and to control the actuator system dependent on the coupling signal and the signal from the body vibration sensor. | 02-19-2015 |
20150062740 | TAPE STORAGE SYSTEM - A tape storage medium includes a tape head for reading/writing data from/to a tape storage medium. At least one servo band along a longitudinal extension of the tape storage medium determines positional information. The servo band includes a set of servo tracks having a width extending along the longitudinal extension and arranged next to each other. A total of two different servo patterns are contained in the set of servo tracks. The tape head includes two servo readers. A width of each servo reader orthogonal to the longitudinal extension of the tape storage medium is at least half the width of a servo track. The two servo readers are offset from each other orthogonal to the longitudinal extension by d*wST+n*wST with wST being the width of the servo track, with 003-05-2015 | |
20150062747 | ALIGNING A FIRST ELEMENT COUPLED TO AN ACTUATOR WITH A SECOND ELEMENT OF A MAIN SYSTEM - A control system for aligning a first element coupled to an actuator with a second element of a main system includes a position sensor that measures an absolute position of the first element relative to the main system as a sensor signal, a position error signal-based compensator that generates a second control signal as a function of a position error signal, wherein the position error signal indicates a relative position of the first element as a difference between the actual position of the first element and a target position of the first element relative to the second element, a sensor-based compensator that generates a first control signal as a function of the sensor signal and the second control signal, and an actuator that changes the position of the first element relative to the second element dependent on the first control signal to align the first element with the second element. | 03-05-2015 |
20150092291 | TAPE STORAGE MEDIUM - A tape storage medium comprises at least one data band and the data band comprises a set of data sub-bands adjacent to each other. Each data sub-band contains a set of data tracks along a longitudinal extension of the tape storage medium and adjacent to each other. Each data sub-band of the set comprises a pair of servo tracks for supporting to determine positional information. The set of data tracks of each data sub-band is arranged between the servo tracks of the pair. The servo tracks of the pair contain the same servo pattern. | 04-02-2015 |
20150092294 | READING FROM A TAPE STORAGE MEDIUM - In a method for operating a tape storage system, readback signals are simultaneously received from a set of data readers reading from data tracks of a set of adjacent data tracks extending along a longitudinal extension of a tape storage medium, wherein each data track of the set has a width and each data reader of the set has a width equal to or less than the width of a data track. Simultaneously to receiving the readback signals from the set of data readers readback signals are received from a servo reader arrangement containing at least one servo reader arranged laterally offset from one of the data readers by less than the width of a data track. At least one of lateral position, velocity, gain and timing information is determined dependent on the readback signals of each servo reader in the servo reader arrangement. | 04-02-2015 |
20150092295 | READING FROM A TAPE STORAGE MEDIUM - A method for operating a tape storage system includes simultaneously receiving readback signals from a set of data readers reading from data tracks of a set of adjacent data tracks extending along a longitudinal extension of a tape storage medium. Each data track has a width and each data reader has a width that exceeds the width of a data track. In the readback signal, of one of the data readers of the set a simultaneous presence of two defined waveforms is detected stemming from two different servo patterns arranged in servo sections of adjacent data tracks of the set. At least one of lateral position, velocity, gain and timing information is derived from a measure of the energy of the two defined waveforms detected in the readback signal of the data reader and applying this information in the operation of the tape storage system. | 04-02-2015 |
20150146320 | READING FROM A TAPE STORAGE MEDIUM - A method for operating a tape storage system includes simultaneously receiving readback signals from a set of data readers reading from data tracks of a set of adjacent data tracks extending along a longitudinal extension of a tape storage medium. Each data track has a width and each data reader has a width that exceeds the width of a data track. In the readback signal, of one of the data readers of the set a simultaneous presence of two defined waveforms is detected stemming from two different servo patterns arranged in servo sections of adjacent data tracks of the set. At least one of lateral position, velocity, gain and timing information is derived from a measure of the energy of the two defined waveforms detected in the readback signal of the data reader and applying this information in the operation of the tape storage system. | 05-28-2015 |
20150162037 | SERVO CONTROL - A tape head includes a set of one or more segments, wherein each segment of the set is individually movable with respect to a frame; each segment of the set comprising at least one of a write element configured to write data to a tape and a read element configured to read data from the tape; and each segment of the set comprising a further read element having a width transverse to a motion direction of the tape being at least a width of the write element of the segment or, in the event that no write element is comprised in the segment, of a write element of a different segment. | 06-11-2015 |
Patent application number | Description | Published |
20080270061 | SYSTEM AND METHOD FOR SENSOR REPLICATION FOR ENSEMBLE AVERAGING IN MICRO-ELECTROMECHANICAL SYSTEM (MEMS) - A MEMs-based system (and method), includes a sensor array including at least two sensors providing a basis for ensemble averaging. | 10-30-2008 |
20080284365 | SERVO SYSTEM FOR A TWO-DIMENSIONAL MICRO-ELECTROMECHANICAL SYSTEM (MEMS)-BASED SCANNER AND METHOD THEREFOR - A servo control system micro-electromechanical systems (MEMS)-based motion control system (and method therefor), includes a motion generator having an inherent stiffness component. | 11-20-2008 |
20090073849 | HIGH DENSITY DATA STORAGE MEDIUM - A data storage system includes a read/write head having a tip connected to a resistive path locally exerting heat at the tip when an electrical current is applied; and a data storage medium from which information is reproduced by scanning a surface of the medium with a tip positioned in contact therewith, the medium comprising: a substrate; and a polymer recording surface within which data bit values are determined by the topographical state at the bit location, characterized in that the polymer contains thermally reversible crosslinkages. | 03-19-2009 |
20140029131 | TRANSPORT SYSTEM FOR TRANSPORTING MAGNETIC TAPE - A transport system for transporting magnetic tape includes at least one roller for guiding the magnetic tape having at least one electrode and a controller being configured to apply a voltage to the at least one electrode so as to produce a force of attraction between the magnetic tape and the at least one electrode. | 01-30-2014 |
20140029134 | TRANSPORT SYSTEM FOR TRANSPORTING MAGNETIC TAPE - A transport system for transporting magnetic tape includes at least one roller for guiding the magnetic tape having at least one electrode, wherein the at least one electrode is configured to be charged triboelectrically so as to produce a force of attraction between the magnetic tape and the at least one electrode. | 01-30-2014 |
Patent application number | Description | Published |
20140363699 | CURRENT-PERPENDICULAR-TO-PLANE MAGNETORESISTIVE READ SENSOR - A current-perpendicular-to-plane magnetoresistive read sensor includes a stack of layers extending along a stacking direction, and an edge surface parallel to the stacking direction that forms at least part of a bearing surface of the read sensor, the bearing surface designed to face a recording medium. The stack of layers includes a first contact layer, a ferromagnetic free layer whose magnetic orientation varies according to an applied magnetic field, above the first contact layer, a non-magnetic layer above the ferromagnetic layer, a ferromagnetic spin injection layer above the non-magnetic layer, and a second contact layer above the spin injection layer, such that a current can flow between the second contact layer and the first contact layer along a current-perpendicular-to-plane direction, parallel to the stacking direction. The stack of layers further includes a series of structures extending along a direction parallel to the bearing surface and perpendicular to the stacking direction. | 12-11-2014 |
20140368953 | TAPE HEAD WITH TAPE-BEARING SURFACE EXHIBITING AN ARRAY OF PROTRUDING TOPOGRAPHIC FEATURES - A tape head, adapted for reading and/or writing to a magnetic tape, has a tape-bearing surface and is configured to urge a magnetic tape against the bearing surface, in operation. The bearing surface includes a transducer area, having at least one transducer that is a read and/or write element, designed for reading and/or writing to a magnetic tape, and a structured area adjacent to the transducer area, comprising a periodic array of topographic features, the topographic features configured within the structured area to determine a minimal distance between the transducer area and a tape. | 12-18-2014 |
20150194173 | TAPE HEAD WITH TAPE-BEARING SURFACE EXHIBITING AN ARRAY OF PROTRUDING TOPOGRAPHIC FEATURES - A tape head, adapted for reading and/or writing to a magnetic tape, has a tape-bearing surface and is configured to urge a magnetic tape against the bearing surface, in operation. The bearing surface includes a transducer area, having at least one transducer that is a read and/or write element, designed for reading and/or writing to a magnetic tape, and a structured area adjacent to the transducer area, comprising a periodic array of topographic features, the topographic features configured within the structured area to determine a minimal distance between the transducer area and a tape. | 07-09-2015 |
Patent application number | Description | Published |
20100214689 | DEVICE AND STRUCTURE FOR REDUCING TAPE MOTION AND STATIC FRICTION - A tape mounting apparatus for a magnetic tape data storage device which includes a movable structure movably attached to a base. The movable structure moves partially within the base and is powered by a motor unit. The moveable structure has at least a load position and a transport position. A tape guide device is positioned within the movable structure such that a tape passes over the tape guide device and between a tape reading head and the tape guide device. The base is attached to a body of a magnetic tape data storage drive. | 08-26-2010 |
20100214690 | ROLLER GUIDE FOR MAGNETIC TAPE WITH MULTIPLE GUIDING SECTIONS - A device for guiding a magnetic tape in a data storage drive including a cylindrical body rotatable about a longitudinal axis. The cylindrical body having opposing ends and defining a surface area for mating with a magnetic tape. A curved section at opposite ends of the cylindrical body is contiguous with the surface area of the cylindrical body. A plurality of vents in the cylindrical body allow air flow therethrough between the surface area and the tape. The amount of air flow between the cylindrical body and the tape produces varying frictional forces on the tape such that the tape is biased to a nominal position on the cylindrical body by air pressure on the tape resulting from the air flow interaction with the curved sections. | 08-26-2010 |
20120262824 | MAGNETIC WRITE HEAD WITH STRUCTURED TRAILING POLE - The invention is directed to a magnetic write head configured for writing to a magnetic medium, such as, a magnetic tape along a longitudinal direction x. The magnetic write head includes a trailing pole with a first face of height r | 10-18-2012 |
20130003224 | MAGNETIC WRITE HEAD WITH STRUCTURED TRAILING POLE - The invention is directed to a magnetic write head configured for writing to a magnetic medium, such as, a magnetic tape along a longitudinal direction x. The magnetic write head includes a trailing pole with a first face of height r | 01-03-2013 |
20140320993 | TAPE HEAD WITH THERMAL TAPE-HEAD DISTANCE SENSOR - Tape head with thermal tape-head distance sensor to reduce the distance between the tape and the head to allow an increase in areal density. A tape head designed for reading and/or writing to a tape, including: a tape bearing surface shaped to form an air bearing when moving the tape with respect to the tape bearing surface; a thermal tape-head distance sensor circuit adapted to sense heat dissipated at the level of the tape bearing surface by the tape and thereby sense a distance between the tape bearing surface and the tape; and tape-head distance control means connected to the thermal tape-head distance sensor circuit to receive a signal provided by the tape-head distance sensor circuit and configured to alter the distance according to a signal received from the tape-head distance sensor circuit. This invention is further directed to a method of tape-head distance control for the above tape head. | 10-30-2014 |
20150243314 | TAPE HEAD WITH THERMAL TAPE-HEAD DISTANCE SENSOR - Tape head with thermal tape-head distance sensor to reduce the distance between the tape and the head to allow an increase in areal density. A tape head designed for reading and/or writing to a tape, including: a tape bearing surface shaped to form an air bearing when moving the tape with respect to the tape bearing surface; a thermal tape-head distance sensor circuit adapted to sense heat dissipated at the level of the tape bearing surface by the tape and thereby sense a distance between the tape bearing surface and the tape; and tape-head distance control means connected to the thermal tape-head distance sensor circuit to receive a signal provided by the tape-head distance sensor circuit and configured to alter the distance according to a signal received from the tape-head distance sensor circuit. This invention is further directed to a method of tape-head distance control for the above tape head. | 08-27-2015 |