GB1263130A - Magnetic recording and reproducing head - Google Patents

Magnetic recording and reproducing head

Info

Publication number
GB1263130A
GB1263130A GB4703869A GB4703869A GB1263130A GB 1263130 A GB1263130 A GB 1263130A GB 4703869 A GB4703869 A GB 4703869A GB 4703869 A GB4703869 A GB 4703869A GB 1263130 A GB1263130 A GB 1263130A
Authority
GB
United Kingdom
Prior art keywords
gap
plate
channel
epoxy
playback
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
GB4703869A
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 GB1263130A publication Critical patent/GB1263130A/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
    • G11B23/0007—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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/265—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same 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
    • G11B5/265—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track
    • G11B5/2651—Manufacture

Landscapes

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

Abstract

1,263,130. Magnetic heads. INTERNATIONAL BUSINESS MACHINES CORP. 24 Sept. 1969 [16 Oct., 1968; 9 Jan., 1969], No. 47038/69. Heading G5R. A magnetic head has a record/playback gap 15 and an erase gap 20 with their longitudinal axes relatively inclined, the gap 15 falling within the confines of the gap 20. The arrangement prevents pre-echo caused by playback from the erase gap. The head is made by: (a) fixing a U-shaped ferrite or laminated alloy core 121 to a brass plate 123 and cutting a trapezoidal channel through the core and into the plate; (b) locating a centre limb 135, with a corresponding tip, in the channel, and fixing a second plate 145 over the assembly by epoxy with the interposition of spacers 141, 143, the spacer ends extending into the channel and grooves in plate 145; (c) machining the operative face after filling the voids with epoxy; and (d) assembling the structure 165 in a casing 173 containing wound bobbins 166-168 and wedging an E-shaped lamination 179 on each side to complete the magnetic circuit.
GB4703869A 1968-10-16 1969-09-24 Magnetic recording and reproducing head Expired GB1263130A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US76808468A 1968-10-16 1968-10-16
US79013969A 1969-01-09 1969-01-09

Publications (1)

Publication Number Publication Date
GB1263130A true GB1263130A (en) 1972-02-09

Family

ID=27118005

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4703869A Expired GB1263130A (en) 1968-10-16 1969-09-24 Magnetic recording and reproducing head

Country Status (5)

Country Link
AT (1) AT296646B (en)
DK (1) DK127763B (en)
GB (1) GB1263130A (en)
NL (1) NL6914532A (en)
SE (1) SE361767B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2751211A1 (en) * 1977-11-16 1979-05-17 Grundig Emv Eraser head for single- or multitrack tape recorder - features pole shoe, yoke, coil and signal gap filled with hard dense material e.g. strongly filled epoxy! resin
GB2221784A (en) * 1988-07-13 1990-02-14 Samsung Electronics Co Ltd Magnetic head for reading information on a diskette

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2751211A1 (en) * 1977-11-16 1979-05-17 Grundig Emv Eraser head for single- or multitrack tape recorder - features pole shoe, yoke, coil and signal gap filled with hard dense material e.g. strongly filled epoxy! resin
GB2221784A (en) * 1988-07-13 1990-02-14 Samsung Electronics Co Ltd Magnetic head for reading information on a diskette
GB2221784B (en) * 1988-07-13 1992-08-12 Samsung Electronics Co Ltd Magnetic head for reading information on a diskette

Also Published As

Publication number Publication date
DK127763B (en) 1973-12-31
NL6914532A (en) 1970-04-20
AT296646B (en) 1972-02-25
SE361767B (en) 1973-11-12

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