GB2153302A - Method and apparatus for hydrodynamic magnetic recording - Google Patents

Method and apparatus for hydrodynamic magnetic recording

Info

Publication number
GB2153302A
GB2153302A GB08506178A GB8506178A GB2153302A GB 2153302 A GB2153302 A GB 2153302A GB 08506178 A GB08506178 A GB 08506178A GB 8506178 A GB8506178 A GB 8506178A GB 2153302 A GB2153302 A GB 2153302A
Authority
GB
United Kingdom
Prior art keywords
head
drum
recording
magnetic recording
intimate contact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08506178A
Other versions
GB2153302B (en
GB8506178D0 (en
Inventor
Andrew M Bardos
Jon E Holmes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harris Graphics Corp
Original Assignee
Harris Graphics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harris Graphics Corp filed Critical Harris Graphics Corp
Publication of GB8506178D0 publication Critical patent/GB8506178D0/en
Publication of GB2153302A publication Critical patent/GB2153302A/en
Application granted granted Critical
Publication of GB2153302B publication Critical patent/GB2153302B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/50—Reconditioning of record carriers; Cleaning of record carriers ; Carrying-off electrostatic charges
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G19/00—Processes using magnetic patterns; Apparatus therefor, i.e. magnetography
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
    • G11B21/20—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier
    • G11B21/21—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier with provision for maintaining desired spacing of head from record carrier, e.g. fluid-dynamic spacing, slider
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/41—Cleaning of heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

Problems of wear and bounce created by inperfections in the surface (12) of a magnetic recording medium, such as a chromium dioxide-coated drum (10), are circumvented by a hydrodynamic magnetographic imaging technique that provides the intended effective intimate contact between the recording head (14) and the magnetographic recording surface (12). A liquid (e.g. water) (51) is applied to the surface of the drum (10) slightly upstream of the location of the recording head (14), so as to create a liquid bearing (51) against which the recording head (14) is urged, and thereby intimately magnetically coupled with the surface of the drum, except for an extremely thin liquid film (51) between the head (14) and drum surface (12). As a result of this extremely thin liquid bearing (51), continuous pressure can be applied to the head (14) to maintain the head (14) in effective intimate contact with the surface (12) of the recording medium without the fear of scratching the medium or causing wear on the head (14).
GB08506178A 1983-08-02 1984-08-02 Method and apparatus for hydrodynamic magnetic recording Expired GB2153302B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51975983A 1983-08-02 1983-08-02
PCT/US1984/001224 WO1985000918A1 (en) 1983-08-02 1984-08-02 Method and apparatus for hydrodynamic magnetic recording

Publications (3)

Publication Number Publication Date
GB8506178D0 GB8506178D0 (en) 1985-04-11
GB2153302A true GB2153302A (en) 1985-08-21
GB2153302B GB2153302B (en) 1988-03-09

Family

ID=24069667

Family Applications (2)

Application Number Title Priority Date Filing Date
GB08506178A Expired GB2153302B (en) 1983-08-02 1984-08-02 Method and apparatus for hydrodynamic magnetic recording
GB8630134A Expired - Lifetime GB2198690B (en) 1983-08-02 1986-12-17 Method of, and apparatus for magnetic recording

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB8630134A Expired - Lifetime GB2198690B (en) 1983-08-02 1986-12-17 Method of, and apparatus for magnetic recording

Country Status (5)

Country Link
JP (1) JPS60501923A (en)
CA (1) CA1221164A (en)
DE (1) DE3490368T1 (en)
GB (2) GB2153302B (en)
WO (1) WO1985000918A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2198690A (en) * 1983-08-02 1988-06-22 Harris Graphics Corp Method of, and apparatus for magnetographic recording

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193046A (en) * 1988-10-17 1993-03-09 Conner Peripherals, Nc. Information recording apparatus with a liquid bearing
JP2796852B2 (en) * 1988-10-31 1998-09-10 インターナショナル・ビジネス・マシーンズ・コーポレーション Magnetic storage device and method
EP0384762B1 (en) * 1989-02-24 1995-04-26 Conner Peripherals, Inc. Wet rigid disk drive assembly with a conical spindle bearing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969435A (en) * 1955-02-07 1961-01-24 Ibm Oil film spacer for magnetic recording device
US3005675A (en) * 1956-02-08 1961-10-24 Lab For Electronics Inc Fluid bearing control for a magnetic head
DE1239354B (en) * 1957-11-28 1967-04-27 Zuse K G Device for recording or sampling signals on recording media

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1221164A (en) * 1983-08-02 1987-04-28 Andrew M. Bardos Method and apparatus for hydrodynamic magnetic recording

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969435A (en) * 1955-02-07 1961-01-24 Ibm Oil film spacer for magnetic recording device
US3005675A (en) * 1956-02-08 1961-10-24 Lab For Electronics Inc Fluid bearing control for a magnetic head
DE1239354B (en) * 1957-11-28 1967-04-27 Zuse K G Device for recording or sampling signals on recording media

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2198690A (en) * 1983-08-02 1988-06-22 Harris Graphics Corp Method of, and apparatus for magnetographic recording
GB2198690B (en) * 1983-08-02 1991-01-23 Harris Graphics Corp Method of, and apparatus for magnetic recording

Also Published As

Publication number Publication date
CA1221164A (en) 1987-04-28
GB2153302B (en) 1988-03-09
GB2198690A (en) 1988-06-22
DE3490368T1 (en) 1985-10-17
GB8630134D0 (en) 1987-01-28
JPS60501923A (en) 1985-11-07
WO1985000918A1 (en) 1985-02-28
GB8506178D0 (en) 1985-04-11
GB2198690B (en) 1991-01-23

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee