JPS57500355A - - Google Patents

Info

Publication number
JPS57500355A
JPS57500355A JP56501205A JP50120581A JPS57500355A JP S57500355 A JPS57500355 A JP S57500355A JP 56501205 A JP56501205 A JP 56501205A JP 50120581 A JP50120581 A JP 50120581A JP S57500355 A JPS57500355 A JP S57500355A
Authority
JP
Japan
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.)
Pending
Application number
JP56501205A
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 filed Critical
Publication of JPS57500355A publication Critical patent/JPS57500355A/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
    • 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/23—Gap features
    • G11B5/235—Selection of material for gap filler
    • 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/245—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track
    • 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/29—Structure or manufacture of unitary devices formed of plural heads for more than one track
    • 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
    • G11B5/49—Fixed mounting or arrangements, e.g. one head per track
    • G11B5/4907—Details for scanning
JP56501205A 1980-03-24 1981-03-09 Pending JPS57500355A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/133,076 US4346417A (en) 1980-03-24 1980-03-24 Selectively actuable magnetic head

Publications (1)

Publication Number Publication Date
JPS57500355A true JPS57500355A (ja) 1982-02-25

Family

ID=22456903

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56501205A Pending JPS57500355A (ja) 1980-03-24 1981-03-09

Country Status (5)

Country Link
US (1) US4346417A (ja)
EP (1) EP0048731A4 (ja)
JP (1) JPS57500355A (ja)
CA (1) CA1149940A (ja)
WO (1) WO1981002803A1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4750071A (en) * 1985-08-28 1988-06-07 Canon Denshi Kabushiki Kaisha Magnetic head assembly including a pair of heads disposed in the vicinity of each other
FR2723242B1 (fr) * 1994-07-26 1996-08-30 Thomson Csf Tete magnetique a element saturable et dispositif matriciel comportant un ensemble de tetes magnetiques

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2901549A (en) * 1953-05-29 1959-08-25 Rca Corp Magnetic recording system
US2966666A (en) * 1954-04-30 1960-12-27 Electronique & Automatisme Sa Magnetic record and/or playback heads and control arrangement therefor
US3391254A (en) * 1964-10-15 1968-07-02 William M. Honig Magnetic head with means for producing a shiftable high permeability region in a magnetic permeable material
US3485962A (en) * 1966-11-09 1969-12-23 Gen Electric Magnetic transducer head with remanent flux shunt gap spacer
US3686467A (en) * 1969-08-08 1972-08-22 Iit Res Inst Magnetic transducer system and method
US3810191A (en) * 1972-10-26 1974-05-07 Honeywell Inc Multi-stylus through field recording head
JPS5532285A (en) * 1978-08-28 1980-03-06 Matsushita Electric Ind Co Ltd Multi-channel erasing head unit

Also Published As

Publication number Publication date
US4346417A (en) 1982-08-24
EP0048731A4 (en) 1982-07-19
EP0048731A1 (en) 1982-04-07
CA1149940A (en) 1983-07-12
WO1981002803A1 (en) 1981-10-01

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