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Class 369/13.2 - Operative location positioning of transducer assembly


Subclass of Class 369 - Dynamic information storage or retrieval
Definition: Subject matter wherein a transducer assembly is moved
No. of patents: 57
Last issue date: 03/25/2008


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NumberTitleIssue Date
7350218Optical-disk drive and optical-disk ejection control method
An optical disk drive comprises a drive body, a spindle motor, an optical pickup device, a sled motor, a tray, a loading motor, and a controller. When the loaded optical disk is ejected, the controller controls the sled motor and the loading motor so that the return...
03/25/2008
7333402Magneto-optical head support structures
A suspension supporting a magnetic head is formed by a member different in material from gimbals. As a result, the characteristic of the gimbals minimizing electric power loss in supplying current while sufficiently elastically holding the magnetic head can be compa...
02/19/2008
7277363Magneto-optical recording or reproducing device
A magneto-optical recording or reproducing device having an information erasing means for erasing information or data recorded on a magneto-optical recording medium. According to the invention, the information erasing means comprises an erasing magnet having a field...
10/02/2007
7263039Micro-actuator, manufacturing method thereof, optical pickup head of optical recording/reproducing apparatus with micro-actuator and manufacturing method thereof
A micro-actuator, its manufacturing method, an optical pickup head of an optical recording/reproducing apparatus having the micro-actuator, and its manufacturing method are disclosed. A low voltage and low power bi-directional driving is accomplished so that a size ...
08/28/2007
7221985On-screen calibration system and operating method thereof
An on-screen calibration system for disc drives and the operating method thereof. The calibration system includes an autocollimator detecting the inclined angle of the stage of a disc drive. A control module is connected to the on-screen display module and a bar cod...
05/22/2007
7196975Magneto-optical disk with protective layer, and optical disk device
On a pit information surface (22d) of a read-only optical disk (22), a protective layer (22f) suited for a floating-type or a sliding-type magnetic head (3) used for a magnetic field modulation type magneto-optical disk is f...
03/27/2007
7158329Disk drive employing active braking using inductive sense
A disk drive is disclosed comprising a disk, a head actuated over the disk, and a spindle motor for rotating the disk, the spindle motor comprising a plurality of windings. Disk control circuitry executes a spin-down operation of the spindle motor by estimating an a...
01/02/2007
7155732Heat assisted magnetic recording head and method
A magnetic recording head comprises a write pole having a pole tip adjacent to an air bearing surface, a return pole, a near field transducer positioned adjacent to the air bearing surface for producing near field radiation for heating a portion of a magnetic storag...
12/26/2006
7146714Manufacturing a magneto-optical write/read head
A method of manufacturing a digital magneto-optical signal write/read head including a thin-film in-plane magnetic coil disposed on an outwardly directed surface of a coil substrate. Coil lead in and coil lead out sections of the coil are extended to an interconnect...
12/12/2006
7082007Method to achieve higher track density by allowing only one-sided track encroachment
A disc drive includes a transducer having a separate element for writing information and a separate element for reading information to and from the disc. In a disc drive designated to read and write long sequential records, the track misregistration budget is reduce...
07/25/2006
7020883Loading mechanism of disk player
A disk loading mechanism has a turntable. A turntable 36 itself is fixed in external dimensions of a brushless spindle motor, and a chucking face relevant to a disk 11 is precisely placed on a turntable base 46 with a predetermined height. On th...
03/28/2006
6930727Protection-cover opening/closing mechanism for recording/playback apparatus
A protection-cover opening/closing mechanism for a digital still camera includes an electromagnet having stator around which an electromagnetic coil is formed and a movable member, a first lever to which the movable member is pivotally attached at a first end portio...
08/16/2005
6920087Magneto-optical recording apparatus capable of adjusting the magnetic head
A magneto-optical disk apparatus generates magnetic field onto a magneto-optical recording medium prior to recording signals in the magneto-optical recording medium having a recording layer and a reproduction layer, by use of magnetic field and laser beam. The magne...
07/19/2005
6909673Magneto-optical recording apparatus having a magnetic head with a regulating member
The magneto-optical recording apparatus of the present invention comprises: a magnetic head of which one end is fixed and of which the other end is free and provided with a magnetic field generating portion for applying a magnetic field onto a magneto-optical record...
06/21/2005
6847591Magnetic head device and recording reproducing apparatus
A head main body (12) is supported at a free end of a cantilevered suspension (14). The head main body (12) has a first holding portion (5) that is substantially in parallel to an information recording medium (1), and the suspensio...
01/25/2005
6826130Magneto-optic disk device and method of positioning magnetic head of the device
The invention relates to a structure for and a method of adjusting the position of a magnetic head especially tangentially of a magnetic disk with improved accuracy for use in an optomagnetic disk device. The device has a head support unit 20 comprising a pic...
11/30/2004
6744582Thermal-assisted magnetic storage device and method for driving the reading/writing head thereof
A thermal-assisted magnetic storage device includes a magnetic recording media of a transparent material, a first marker of a material that is optically singular compared with materials therearound, and a magnetic head disposed on a magnetic head slider facing a rec...
06/01/2004
6563768Magneto-optical memory device
A magneto-optical memory device includes a first unit projecting a light beam onto a desired position on a recording medium, and a second unit applying a magnetic field to a position onto which the light beam is projected. The second unit applies, to the ...
05/13/2003
6532125Apparatus and method suitable for magnetic-thermal recording
The invention discloses novel apparatus/methodology for writing/erasing high-density data on a digital recording media. A preferred embodiment of the invention features a novel thermal near-field heater that may be employed in the apparatus, particularly ...
03/11/2003
6430113Magnetic head up/down mechanism for magneto-optical disc drive
A magnetic head up/down mechanism for an magneto-optical disc drive is provided with a magnetic head supporting member mounting a magnetic head. The supporting member is attached to one end of an elongated plate spring member. A moving system is further p...
08/06/2002
6341102Data writing/reading apparatus
A data handling apparatus is provided which includes a rotatable disk provided with at least an innermost track and an outermost track for storing data, and a disk cartridge for housing the disk. The disk cartridge is formed with an opening for exposure o...
01/22/2002
6314062Magneto-optical disk apparatus that can adjust position of magnetic head with respect to optical head
A magnetic head which can apply magnetic fields in opposite directions from each other within a beam spot formed on a magneto-optical disk. This magnetic head includes two cores located in close proximity and two coils. The level of the magneto-optical si...
11/06/2001
6088203Three position magnetic head vertical movement device
A magnetic head vertical movement device for a magnetic-optical recording and/or reproducing apparatus for use with a disk cartridge, within which a magneto-optical disc is accommodated. The device includes a vertical movement drive mechanism for a magnet...
07/11/2000
6044043Magneto-optical head capable of operation under inclination of the disc
A head unit is provided which is able to satisfactorily record/reproduce an information signal to and from a disk even if the disk can considerably be inclined (deflected) by a load applied by the head. The load applied from the magnetic head to the disk ...
03/28/2000
6018505Magneto-optical disc apparatus
In a magneto-optical disc apparatus using an initializing magnetic field generator, the magnetic field generator including a permanent magnet slides on or and floats above a surface of the magneto-optical disc for applying a magnetic field at a position o...
01/25/2000
5995333Positioning a magnetic head base of a magneto-optical disk drive
A magneto-optical disk drive incorporates: a structure to mount a front panel to a frame using a cartridge loading system, using a set of linearly movable control cam plates, to draw a cartridge into a cartridge holder and then to move the cartridge holde...
11/30/1999
5905696Magneto-optical disk drive
Method and apparatus for synchronizing movements of a magnetic head and an optical head of a magneto-optical disk drive. A magnetic head carriage moves a magnetic head between a standby position and a head application position. An optical head carriage su...
05/18/1999
5815470Disc drive unit
A disc drive unit for a magneto-optical disc accommodated in a disc cassette, comprises a magnetic head for applying a magnetic field to the magneto-optical disc, a magnetic head moving mechanism for moving the magnetic head between a loading and unloadin...
09/29/1998
5682360Recording and reproducing apparatus for use with a recording medium having an optical recording layer and magnetic recording layer
A disk-shaped recording medium includes a transparent substrate, and an optical recording layer and a magnetic recording layer formed at one side of the transparent substrate. An optical head applies light to the optical recording layer from a light sourc...
10/28/1997
5594708Magnetooptical disc apparatus with magnetic head
An information recording/reproducing apparatus for effecting recording of information on and/or reproduction of information from a recording medium by applying a magnetic field modulated according to information while irradiating a light beam to the recor...
01/14/1997
5590098Magnetooptical recording and reproducing apparatus having an automatic head lifting device
A magnetooptical recording/reproducing apparatus for recording and/or reproducing information from a magnetooptical disk seated in a disk cartridge by using an optical pickup and a magnetic head. A cartridge holding member pivots for loading a disk cartri...
12/31/1996
5583834Mini disc player
A recording and/or reproducing apparatus for a recording medium including a head for reproducing the information on or from the recording medium, a movement mechanism for moving the recording medium between a first position enabling recording and/or repro...
12/10/1996
5577008Magneto-optical disk drive system
A magneto-optical disk drive system, utilizing a magnetic field modulation recording method, has a disk cartridge for housing a magneto-optical disk therein and insertable into a system housing and a magnetic head in the system housing for writing informa...
11/19/1996
5557588Magnetooptical recording/reproducing apparatus with bias magnetic field generation devices for magnetic modulation recording and optical modulation recording
In a magnetooptical recording/reproducing apparatus, a beam spot is formed on a recording medium by radiating a laser beam from an optical head to the recording medium. In magnetic field modulation recording, a bias magnetic field is applied from a first ...
09/17/1996
5557589Disc recording and/or reproducing apparatus that positions the magnetic head in response to a type of disc
A disc type detection arm contacts a disc type opening formed in a disc cartridge when the disc cartridge is loaded into a recording and/or reproducing apparatus. The disc type detection arm determines the type of disc which has been loaded by the depth o...
09/17/1996
5513159Device for selecting magnetic head to be operated together with an optical head
A device is provided for selecting a magnetic head to be operated together with an optical head to record or reproduce a signal on a magneto-optical disc. The device includes a first magnetic head and a second magnetic head, each having different capabili...
04/30/1996
5450377Magnetooptical recording and reproducing apparatus having an automatic hand lifting device
A magnetooptical recording/reproducing apparatus for recording and/or reproducing information from a magnetooptical disk seated in a disk cartridge by using an optical pickup and a magnetic head. A cartridge holding member pivots for loading a disk cartri...
09/12/1995
5448535Head position control device
A head position controlling device in which the head position may be controlled accurately even with a magneto-optical disc having regions with different reflectance values. A gap sensor consisting of a light emitting element 5 and light receiving element...
09/05/1995
5442596Recording/reproducing apparatus having a magnetic head which is opened and closed together with a door
A recording/reproducing apparatus for a magneto-optical disk includes an optical pickup a magnetic head, to record and reproduce information. The apparatus includes a connecting member for making the magnetic head move together with the optical pickup, an...
08/15/1995
5333124Magnetic optical disk player having improved servoresponse sensitivity
A magnetic optical disk player comprises a turn table for turning a magnetic optical disk, a recording head and an erasing head movable along two different radial directions of the turn table respectively, and bias magnets for generating bias magnetic fie...
07/26/1994
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