CA1030655A - Static field magnetic erase head with reduced distortion - Google Patents

Static field magnetic erase head with reduced distortion

Info

Publication number: CA1030655A
Authority: CA; Canada
Prior art keywords: field magnetic; static field; erase head; reduced distortion; magnetic erase
Prior art date: 1973-10-02
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.): Expired

Application number

CA210,507A

Other languages

English (en)

French (fr)

Other versions

CA210507S (en

Inventor

Makoto Saito

Kengo Matsumoto

Kiyonori Hayakawa

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.)

Sony Corp

Original Assignee

Sony 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.)

1973-10-02

Filing date

1974-10-01

Publication date

1978-05-02

1973-10-02 Priority claimed from JP11086673A external-priority patent/JPS531645B2/ja

1973-10-02 Priority claimed from JP11504173U external-priority patent/JPS5329134Y2/ja

1974-10-01 Application filed by Sony Corp filed Critical Sony Corp

1978-05-02 Application granted granted Critical

1978-05-02 Publication of CA1030655A publication Critical patent/CA1030655A/en

Status Expired legal-status Critical Current

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
- G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information
- 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
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
- G11B5/027—Analogue recording
- G11B5/03—Biasing

CA210,507A 1973-10-02 1974-10-01 Static field magnetic erase head with reduced distortion Expired CA1030655A (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
JP11086673A JPS531645B2 (it)	1973-10-02	1973-10-02
JP11504173U JPS5329134Y2 (it)	1973-10-02	1973-10-02

Publications (1)

Publication Number	Publication Date
CA1030655A true CA1030655A (en)	1978-05-02

Family

ID=26450389

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA210,507A Expired CA1030655A (en)	1973-10-02	1974-10-01	Static field magnetic erase head with reduced distortion

Country Status (7)

Country	Link
US (1)	US3947891A (it)
CA (1)	CA1030655A (it)
DE (1)	DE2446866C2 (it)
FR (1)	FR2246924B1 (it)
GB (1)	GB1478179A (it)
IT (1)	IT1030640B (it)
NL (1)	NL7413029A (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS52121310A (en) *	1976-04-06	1977-10-12	Olympus Optical Co Ltd	Erase head using permanent magnet and its magnetizing method
JPS5577025A (en) *	1978-12-01	1980-06-10	Tdk Corp	Erasing head
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
US5959812A (en) *	1997-07-25	1999-09-28	Imation Corp.	Fringe field compensation system for multi-track servo recording head
JP2010277624A (ja) *	2009-05-26	2010-12-09	Toshiba Storage Device Corp	磁気記録装置、ヘッド評価装置、スピンスタンド装置およびライトポールイレーズ評価方法
DE102018116896B4 (de) *	2018-07-12	2024-05-23	Gottfried Wilhelm Leibniz Universität Hannover	Magnetkopf, Verfahren zur Speicherung von Information sowie Erzeugnis

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2546927A (en) *	1947-09-13	1951-03-27	Indiana Steel Products Co	Polarizing head for magnetic recorders
NL78443C (it) *	1950-01-20
US2784259A (en) *	1952-12-17	1957-03-05	Armour Res Found	Recording and erase head for magnetic recorders
US2908768A (en) *	1955-04-13	1959-10-13	Steinegger Giovanni	Device for demagnetizing the magnetized wire of a sound recording and reproducing apparatus
JPS549044B1 (it) *	1970-05-21	1979-04-20

1974
- 1974-09-27 US US05/509,947 patent/US3947891A/en not_active Expired - Lifetime
- 1974-09-30 GB GB4227974A patent/GB1478179A/en not_active Expired
- 1974-10-01 CA CA210,507A patent/CA1030655A/en not_active Expired
- 1974-10-01 DE DE2446866A patent/DE2446866C2/de not_active Expired
- 1974-10-02 NL NL7413029A patent/NL7413029A/xx not_active Application Discontinuation
- 1974-10-02 FR FR7433232A patent/FR2246924B1/fr not_active Expired
- 1974-10-02 IT IT7428017A patent/IT1030640B/it active

Also Published As

Publication number	Publication date
US3947891A (en)	1976-03-30
FR2246924B1 (it)	1978-06-09
IT1030640B (it)	1979-04-10
GB1478179A (en)	1977-06-29
NL7413029A (nl)	1975-04-04
FR2246924A1 (it)	1975-05-02
DE2446866A1 (de)	1975-04-10
DE2446866C2 (de)	1985-11-07

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