GB902838A - A process for the production of magnetic recording media - Google Patents

A process for the production of magnetic recording media

Info

Publication number
GB902838A
GB902838A GB3189459A GB3189459A GB902838A GB 902838 A GB902838 A GB 902838A GB 3189459 A GB3189459 A GB 3189459A GB 3189459 A GB3189459 A GB 3189459A GB 902838 A GB902838 A GB 902838A
Authority
GB
United Kingdom
Prior art keywords
particles
tape
binder
disc
orientation
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
GB3189459A
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.)
Agfa Gevaert NV
Original Assignee
Agfa AG
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 Agfa AG filed Critical Agfa AG
Publication of GB902838A publication Critical patent/GB902838A/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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/852—Orientation in a magnetic field
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/782—Television signal recording using magnetic recording on tape
    • H04N5/7822—Television signal recording using magnetic recording on tape with stationary magnetic heads

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Paints Or Removers (AREA)

Abstract

902,838. Magnetic structures. AGFA A.G. Sept. 18, 1959 [Sept. 19, 1958], No. 31894/59. Class 38 (2). In manufacturing magnetic record comprising a layer of iron oxide particles disposed in a hardenable binder and applied to a plastic base to form a tape or to a plate or cylinder the particles are orientated, whilst the binder is still moist, by a magnetic field or fields so that the direction of orientation is different at different parts of the layer. For a disc the particles may be orientated circularly around the disc as shown in Fig. 1b by rotating the disc above a magnet 2. Fig. 2a shows a tape wherein the main direction of orientation is transverse to the tape, but a narrow band 3 has longitudinal orientation. The magnetic particles may be acicular iron oxide 1Á x 0.1Á, and the binder may be lacquer, the layer thickness being 10-20 Á.
GB3189459A 1958-09-19 1959-09-18 A process for the production of magnetic recording media Expired GB902838A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA0030341 1958-09-19

Publications (1)

Publication Number Publication Date
GB902838A true GB902838A (en) 1962-08-09

Family

ID=6927178

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3189459A Expired GB902838A (en) 1958-09-19 1959-09-18 A process for the production of magnetic recording media

Country Status (2)

Country Link
BE (1) BE582785A (en)
GB (1) GB902838A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0025160A1 (en) * 1979-09-06 1981-03-18 Agfa-Gevaert AG Process for coating flexible supports with magnetic dispersions containing a binder
EP0041321A1 (en) * 1980-05-08 1981-12-09 Yoshiro Nakamatsu Recording media
EP0067367A2 (en) * 1981-06-15 1982-12-22 Agfa-Gevaert AG Magnetic orientation system
GB2181672A (en) * 1983-12-12 1987-04-29 Bellmatic Ltd Production of magnetic recording discs

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0025160A1 (en) * 1979-09-06 1981-03-18 Agfa-Gevaert AG Process for coating flexible supports with magnetic dispersions containing a binder
EP0041321A1 (en) * 1980-05-08 1981-12-09 Yoshiro Nakamatsu Recording media
EP0067367A2 (en) * 1981-06-15 1982-12-22 Agfa-Gevaert AG Magnetic orientation system
EP0067367A3 (en) * 1981-06-15 1984-08-29 Agfa-Gevaert Aktiengesellschaft Magnetic orientation system
GB2181672A (en) * 1983-12-12 1987-04-29 Bellmatic Ltd Production of magnetic recording discs

Also Published As

Publication number Publication date
BE582785A (en) 1960-03-18

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