GB1528599A - Magnetic record and/or reproduce head and manufacturing method - Google Patents

Magnetic record and/or reproduce head and manufacturing method

Info

Publication number
GB1528599A
GB1528599A GB4442875A GB4442875A GB1528599A GB 1528599 A GB1528599 A GB 1528599A GB 4442875 A GB4442875 A GB 4442875A GB 4442875 A GB4442875 A GB 4442875A GB 1528599 A GB1528599 A GB 1528599A
Authority
GB
United Kingdom
Prior art keywords
pieces
bars
gap
track
slots
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
GB4442875A
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.)
Spin Physics Inc
Original Assignee
Spin Physics Inc
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 Spin Physics Inc filed Critical Spin Physics Inc
Publication of GB1528599A publication Critical patent/GB1528599A/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)

Abstract

1528599 Magnetic heads SPIN PHYSICS Inc 28 Oct 1975 [29 Oct 1974] 44428/75 Heading G5R A single-track video magnetic tape head has ferrite polepieces defining a transducing gap therebetween and two ceramic wear support pieces (22<SP>1</SP>), (22<SP>11</SP>), Fig. 2 (not shown), extending across the gap one at each side of the track, the ceramic pieces wearing slightly faster than the ferrite polepieces. Magnetic ferrite bars 10, 12 may be glass bonded together to define the transducing gap, or gap-defining material may be deposited by sputtering followed by glass bonding of the bars 10, 12. Slots 23 are then formed in bars 10, 12 and wear support pieces 22 located in the slots. The pieces 22 are preferably of a glass material which devitrifies into a ceramic material on heating the assembly of bars 10, 12 and pieces 22, such heating bonding the pieces 22 in slots 23. The assembly 14 is then contoured along line 30, polished and sliced at 32, 34 through the pieces 22 into individual single track heads the magnetic circuits of which are completed by rear parts of bars 10, 12, such rear parts being separated by a back gap (36), Fig. 2, wider than the track width 26.
GB4442875A 1974-10-29 1975-10-28 Magnetic record and/or reproduce head and manufacturing method Expired GB1528599A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US51935874A 1974-10-29 1974-10-29

Publications (1)

Publication Number Publication Date
GB1528599A true GB1528599A (en) 1978-10-11

Family

ID=24067960

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4442875A Expired GB1528599A (en) 1974-10-29 1975-10-28 Magnetic record and/or reproduce head and manufacturing method

Country Status (6)

Country Link
JP (1) JPS5167119A (en)
CA (1) CA1059623A (en)
DE (1) DE2548435A1 (en)
FR (1) FR2289996A1 (en)
GB (1) GB1528599A (en)
NL (1) NL7512688A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5972638A (en) * 1982-10-19 1984-04-24 Sumitomo Special Metals Co Ltd Manufacture of composite magnetic head

Also Published As

Publication number Publication date
NL7512688A (en) 1976-05-04
CA1059623A (en) 1979-07-31
JPS5167119A (en) 1976-06-10
DE2548435A1 (en) 1976-05-06
FR2289996A1 (en) 1976-05-28
FR2289996B1 (en) 1982-01-22

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee