| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 360770130 | Transverse scan path | 11 |
| 20090009905 | IMAGE RECORDING APPARATUS - An image recording apparatus includes two drums, where such a configuration is adopted that both an approaching or spacing direction of a first recording head section corresponding to a first drum of the drums and an approaching or spacing direction of a second recording head section provided corresponding to a second drum of the drums coincide with a width direction (an X-direction) of a recording apparatus main body and are parallel to each other, and a space required by the first recording head section at a spacing completion time and a space required by the second recording head section at a spacing completion time overlap with each other as viewed from a Y-direction. | 01-08-2009 |
| 20090046387 | Patterned media with low switching filled and adjacent track encroachment (ATE) using ECC (exchange coupled composite) media - A patterned disk for a hard disk drive. The patterned disk includes a hard magnetic layer over a substrate. The disk further includes an exchange control layer adjacent to the hard magnetic layer and a soft magnetic layer adjacent to the exchange control layer. The hard and soft magnetic layers are arranged into a plurality of dots that are separated by a non-magnetic material. The soft and hard magnetic layers combined with the exchange control layer creates an exchange coupled composite that has a relatively low switching field and favorable thermal stability. The low switching field improves reliability when the disk is used in perpendicular recording. | 02-19-2009 |
| 20090268339 | TECHNIQUE FOR SIGNAL AND TRANSDUCER ALIGNMENT IN A TAPE DRIVE - In an embodiment, a method is provided for improving signal and transducer alignment in a magnetic tape drive. The method includes writing a first track and a second track to a tape. Each track has an associated track characteristic, which may include fundamental frequency and test binary pattern, among other characteristics. The tracks are adjacent and substantially parallel to one another, and each track has a differing track characteristic value. Each track is read at multiple tracking positions to collect values corresponding to each position. An optimal offset is determined based on the collected values and the corresponding tracking positions. In another embodiment, a magnetic tape drive includes a data reader, a data writer, a processor, and a computer readable medium. The medium has stored instructions, executable by the processor, for carrying out the described method. | 10-29-2009 |
| 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 |
| 20140376126 | CLOSED LOOP CONTROL OF TAPE MEDIA POSITIONING WITHIN TAPE DRIVE USING POSITION ERROR SIGNAL FEEDBACK - 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. | 12-25-2014 |
| 360770140 | By pilot signal | 5 |
| 20080239560 | MAGNETIC DEVICE AND METHOD OF CONTROLLING MAGNETIC DEVICE - According to an aspect of an embodiment, a magnetic device comprises a head for writing data into or reading data from a medium, the head having an actuator for changing a flying height of the head over the medium, a storage for storing characteristic information of areas of the medium and a controller for controlling the actuator on the basis of the characteristic information of the areas of the medium when writing data into or reading data from the areas of the medium. | 10-02-2008 |
| 20080304175 | RECORDING/REPRODUCING APPARATUS AND TRACKING SERVO CONTROL METHOD - A recording/reproducing apparatus includes: a rotary-type magnetic recording medium including a track pattern with concentric or spiral data recording tracks; a composite magnetic head including a reproducing element that reads magnetic signals from the medium and a recording element that writes magnetic signals on the medium; a control unit that moves the magnetic head over the medium to carry out tracking servo control on the reproducing element or the recording element to keep the element on a desired track; and a storage unit that stores offset information that specifies offsets for calculating an adjustment used to adjust a head position of the magnetic head during tracking servo control. The stored offset information specifies at least two different offsets per revolution of the medium. During tracking servo control, the control unit changes the adjustment at least once per revolution of the medium in accordance with offsets specified based on the offset information. | 12-11-2008 |
| 20090154005 | System and Method for Identifying the Signal Integrity of a Signal From a Tape Drive - A system and method for identifying signal degradation in a tape drive is disclosed in which a data signal read from the tape drive and the signal characteristics of the undecoded portion of the data stream are compared with a set of known values. The undecoded portion of the data may comprise the preamble portion of the signal and the comparison set of known values may be saved to local storage on the tape drive. If the comparison of the signal characteristics of the undecoded portion of the data stream and the known set of signal values indicates that data signal is degraded, a notification is generated that indicates that the signal at the tape drive is degraded. | 06-18-2009 |
| 20090268340 | REGULATING TUNING RATE OF ADAPTIVE FILTER COEFFICIENTS FOR FEED-FORWARD DISTURBANCE REJECTION IN A SERVO CONTROL LOOP - In a servo control loop, the rate of change of filter coefficients used by an adaptive filter to counteract external disturbances to head position is regulated in response to a characteristic of an acceleration signal. Regulating the rate of change of the filter coefficients may improve the stability of the servo control loop. | 10-29-2009 |
| 20140355153 | ADAPTIVE DISTURBANCE COMPENSATION WITH MULTI-RATE SYNCHRONIZED SAMPLING - An apparatus and method for providing adaptive disturbance compensation with multi-rate synchronized sampling is disclosed herein. The dynamic disturbance occurring in a media drive during read/write operations is attenuated using the adaptive disturbance compensation scheme. A plurality of compensation filters are used, each of the compensation filters configured to attenuate a disturbance caused by a particular source within the media drive. Each of the compensation filters is computed based on a sampling rate relevant to the respective disturbances. | 12-04-2014 |
| 360770160 | Having head deflection drive (e.g., piezoelectric bimorph) | 1 |
| 20090021857 | Rotational, shear mode, piezoelectric motor integrated into a collocated, rotational, shear mode, piezoelectric micro-actuated suspension, head or head/gimbal assembly for improved tracking in disk drives and disk drive equipment - A rotational, shear mode, piezoelectric motor is integrated with a suspension, head or head gimbal assembly (HGA) into a collocated, rotational, shear mode, piezoelectric micro-actuated suspension, head or head gimbal assembly (HGA) for use in disk drives and disk drive manufacturing equipment. When excited by a control voltage, the collocated, shear mode, piezoelectric micro-actuated HGA rotates the head enabling high frequency, high resolution track positioning of the read/write element. The motor is integrated with the head and flexure (collocation). The head rotates about a rotation axis that is ideally located at the center of mass of the head. A shear mode piezoelectric motor rotates the head. A collocated, rotational, shear mode, piezoelectric micro-actuated HGA has high stiffness, high frequency response, high positioning resolution, low mass and low internal vibration for improved tracking, increased track density and greater disk drive storage capacity. Furthermore, its solid integration improves shock resistance and reduces micro-contamination. | 01-22-2009 |
