GB1016639A - Improvements in or relating to methods of manufacturing cores for magnetic recording and/or play-back heads and to cores manufactured by these methods - Google Patents

Improvements in or relating to methods of manufacturing cores for magnetic recording and/or play-back heads and to cores manufactured by these methods

Info

Publication number
GB1016639A
GB1016639A GB18186/64A GB1818664A GB1016639A GB 1016639 A GB1016639 A GB 1016639A GB 18186/64 A GB18186/64 A GB 18186/64A GB 1818664 A GB1818664 A GB 1818664A GB 1016639 A GB1016639 A GB 1016639A
Authority
GB
United Kingdom
Prior art keywords
tape
methods
head
cores
magnetic recording
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
GB18186/64A
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 GB1016639A publication Critical patent/GB1016639A/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
    • G11B5/41—Cleaning of heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/26—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding workpieces with arcuate surfaces, e.g. parts of car bodies, bumpers or magnetic recording heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/006—Machines or devices using grinding or polishing belts; Accessories therefor for special purposes, e.g. for television tubes, car bumpers
    • 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
    • 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
    • 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
    • G11B5/1871—Shaping or contouring of the transducing or guiding surface
    • 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

Landscapes

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

Abstract

1,016,639. Making magnetic recording &c. heads; television. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. May 1, 1964 [May 6, 1963], No. 18186/64. Heading G5R. [Also in Division B3] The core of a ferrite video-frequency record/ playback head is finished over an elliptical region 21 of the tape-guiding surface 1, Fig. 6, by mounting the head at 16, Fig. 4, in a helicalwrap device, Fig. 3, approximating the record/ playback machine with which the head will later be used and grinding the surface 1 with an abrasive tape 9, the tape and head being driven at relative transducing speed. The tape 9 is a piece of the identical recording tape to be used later whose ferric-oxide/binder coating has been treated with an alcoholic suspension of 2 Á diamond dust particles which, on drying, become embedded in the tape coating.
GB18186/64A 1963-05-06 1964-05-01 Improvements in or relating to methods of manufacturing cores for magnetic recording and/or play-back heads and to cores manufactured by these methods Expired GB1016639A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL292399 1963-05-06

Publications (1)

Publication Number Publication Date
GB1016639A true GB1016639A (en) 1966-01-12

Family

ID=19754678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18186/64A Expired GB1016639A (en) 1963-05-06 1964-05-01 Improvements in or relating to methods of manufacturing cores for magnetic recording and/or play-back heads and to cores manufactured by these methods

Country Status (5)

Country Link
AT (1) AT247635B (en)
BE (1) BE647607A (en)
ES (2) ES299482A1 (en)
GB (1) GB1016639A (en)
NL (1) NL292399A (en)

Also Published As

Publication number Publication date
ES299482A1 (en) 1964-11-01
BE647607A (en) 1964-11-06
NL292399A (en)
AT247635B (en) 1966-06-27
ES303139A1 (en) 1965-03-16

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