GB1148587A - Improvements relating to methods of manufacturing pole-pices for magnetic heads - Google Patents

Improvements relating to methods of manufacturing pole-pices for magnetic heads

Info

Publication number
GB1148587A
GB1148587A GB3077266A GB3077266A GB1148587A GB 1148587 A GB1148587 A GB 1148587A GB 3077266 A GB3077266 A GB 3077266A GB 3077266 A GB3077266 A GB 3077266A GB 1148587 A GB1148587 A GB 1148587A
Authority
GB
United Kingdom
Prior art keywords
glass
magnetic heads
head
ferrite
pices
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
GB3077266A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1148587A publication Critical patent/GB1148587A/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
    • G11B5/193—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features the pole pieces being ferrite or other magnetic particles
    • 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

Landscapes

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

Abstract

1,148,587. Magnetic heads. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 8 July, 1966 [13 July, 1965], No. 30772/66. Heading G5R. A polepiece for a magnetic head is made by polishing a body of sintered oxidic nickel zinc ferrite to form a gap bounding surface for the head, coating the polished surface with a thin layer of glass or vitreous enamel and grinding the body to define a boundary edge of the gap bounding surface. The glass or enamel is matched in respect of machineability and coefficient of expansion with the ferrite. To form a head, two such polepieces may have their glass parts fused together with the ferrite sections at the required separation, and the front face is then ground to provide the correct gap depth.
GB3077266A 1965-07-13 1966-07-08 Improvements relating to methods of manufacturing pole-pices for magnetic heads Expired GB1148587A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6508992A NL6508992A (en) 1965-07-13 1965-07-13

Publications (1)

Publication Number Publication Date
GB1148587A true GB1148587A (en) 1969-04-16

Family

ID=19793626

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3077266A Expired GB1148587A (en) 1965-07-13 1966-07-08 Improvements relating to methods of manufacturing pole-pices for magnetic heads

Country Status (7)

Country Link
AT (1) AT280644B (en)
BE (1) BE683927A (en)
CH (1) CH450489A (en)
DE (1) DE1547045B2 (en)
GB (1) GB1148587A (en)
NL (1) NL6508992A (en)
SE (1) SE328725B (en)

Also Published As

Publication number Publication date
CH450489A (en) 1968-01-31
NL6508992A (en) 1967-01-16
AT280644B (en) 1970-04-27
SE328725B (en) 1970-09-21
BE683927A (en) 1967-01-11
DE1547045A1 (en) 1970-10-22
DE1547045B2 (en) 1976-07-22

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