GB1339091A - Bidirectional magnetic head for use with magnetic tape drives - Google Patents

Bidirectional magnetic head for use with magnetic tape drives

Info

Publication number
GB1339091A
GB1339091A GB3227472A GB3227472A GB1339091A GB 1339091 A GB1339091 A GB 1339091A GB 3227472 A GB3227472 A GB 3227472A GB 3227472 A GB3227472 A GB 3227472A GB 1339091 A GB1339091 A GB 1339091A
Authority
GB
United Kingdom
Prior art keywords
tape
arc
gap
read
bidirectional
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.)
Expired
Application number
GB3227472A
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1339091A publication Critical patent/GB1339091A/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
    • 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
    • G11B15/60—Guiding record carrier
    • G11B15/62—Maintaining desired spacing between record carrier and head
    • G11B15/64—Maintaining desired spacing between record carrier and head by fluid-dynamic spacing
    • 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
    • G11B15/56—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 the record carrier having reserve loop, e.g. to minimise inertia during acceleration measuring or control in connection therewith
    • G11B15/58—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 the record carrier having reserve loop, e.g. to minimise inertia during acceleration measuring or control in connection therewith with vacuum column
    • 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
    • G11B5/488—Disposition of heads
    • G11B5/4893—Disposition of heads relative to moving tape

Landscapes

  • Magnetic Heads (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

1339091 Magnetic transducers INTERNATIONAL BUSINESS MACHINES CORP 11 July 1972 [13 Sept 1971] 32274/72 Heading G5R A head for use with a bidirectional magnetic tape drive has a contour 6 comprising two circular arcs, on which two transducing gaps 1, 2 for reading and writing, respectively, are disposed in positions which are offset relative to the arc centres 12, 13 in opposite directions and by different amounts 21, 22 measured parallel to the line joining the arc centres 12, 13, the read gap offset 21 being greater than the writegap offset 22. As shown, the arc radii R R and R W are equal, and gap 1 is for bidirectional reading, gap 2 for unidirectional writing. Preferably the read gap 1 is in the centre 14 of the tape-contact arc 7-8 and write gap 2 is displaced downstream of the centre 15 of the tapecontact arc 9-10. The tape transport, Fig. 2 (not shown), is preferably arranged so that the read tape-contact arc 7-8 is approximately twice the write tape-contact arc 9-10. The above head geometry is intended to equalize the tape-to-head separation at the read gap, and hence the read characteristics, for the two directions of tape transport.
GB3227472A 1971-09-13 1972-07-11 Bidirectional magnetic head for use with magnetic tape drives Expired GB1339091A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17986671A 1971-09-13 1971-09-13

Publications (1)

Publication Number Publication Date
GB1339091A true GB1339091A (en) 1973-11-28

Family

ID=22658320

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3227472A Expired GB1339091A (en) 1971-09-13 1972-07-11 Bidirectional magnetic head for use with magnetic tape drives

Country Status (8)

Country Link
JP (1) JPS4838115A (en)
BE (1) BE788510A (en)
BR (1) BR7205825D0 (en)
CA (1) CA1005572A (en)
DE (1) DE2239583C3 (en)
FR (1) FR2152619B1 (en)
GB (1) GB1339091A (en)
IT (1) IT964136B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986000456A1 (en) * 1984-06-25 1986-01-16 Sony Corporation Composite magnetic head device
EP0518649A2 (en) * 1991-06-11 1992-12-16 Matsushita Electric Industrial Co., Ltd. Bi-directional tape recording/reproducing device
US5436780A (en) * 1991-06-03 1995-07-25 Matsushita Electric Industrial Co., Ltd. Thin film magnetic head device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986000456A1 (en) * 1984-06-25 1986-01-16 Sony Corporation Composite magnetic head device
US4713710A (en) * 1984-06-25 1987-12-15 Sony Corporation Compact multiple magnetic head apparatus
US5436780A (en) * 1991-06-03 1995-07-25 Matsushita Electric Industrial Co., Ltd. Thin film magnetic head device
EP0518649A2 (en) * 1991-06-11 1992-12-16 Matsushita Electric Industrial Co., Ltd. Bi-directional tape recording/reproducing device
EP0518649A3 (en) * 1991-06-11 1994-04-27 Matsushita Electric Ind Co Ltd

Also Published As

Publication number Publication date
DE2239583B2 (en) 1974-12-19
FR2152619A1 (en) 1973-04-27
CA1005572A (en) 1977-02-15
JPS4838115A (en) 1973-06-05
IT964136B (en) 1974-01-21
BR7205825D0 (en) 1973-07-03
FR2152619B1 (en) 1975-10-03
DE2239583A1 (en) 1973-03-29
BE788510A (en) 1973-01-02
DE2239583C3 (en) 1975-08-21

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Legal Events

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