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DE846801C - Process for eliminating the copying effect in magnetic tapes and device for practicing the process - Google Patents

Process for eliminating the copying effect in magnetic tapes and device for practicing the process

Info

Publication number
DE846801C
DE846801C DES20814A DES0020814A DE846801C DE 846801 C DE846801 C DE 846801C DE S20814 A DES20814 A DE S20814A DE S0020814 A DES0020814 A DE S0020814A DE 846801 C DE846801 C DE 846801C
Authority
DE
Germany
Prior art keywords
tape
practicing
eliminating
magnetic tapes
ferromagnetic material
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
DES20814A
Other languages
German (de)
Inventor
Camillo Dipl-Ing Bodenstein
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.)
Siemens Corp
Original Assignee
Siemens 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 Siemens Corp filed Critical Siemens Corp
Priority to DES20814A priority Critical patent/DE846801C/en
Application granted granted Critical
Publication of DE846801C publication Critical patent/DE846801C/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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/027—Analogue recording
    • G11B5/03—Biasing
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Description

Nach der bekannten Arbeitsweise .werden Ma-. gnettonbänder nach dem Besprechen ohne Zwischenlage auf der Bandspule aufgewickelt. Die aufeinanderliegenden Bandteile beeinflussen sich durch ihre jeweilige Magnetisierung gegenseitig und bewirken damit den sogenannten Kopiereffekt. Auch Zwischenlagen aus nichtmagnetischem Material konnten diesen Kopiereffekt nicht vollständig beseitigen. Erfindungsgemäß sind diese Störungen vermieden, wenn man zusammen mit dem Tonband ein nichtbesprochenes Band aus ferromagnetischem Material, vorzugsweise gleicher Breite, aufspult, so <laß jede Lage des Tonbands von der nächsten durch eine magnetisch abschirmende Zwischenschicht getrennt ist. Zum gemeinsamen Aufspulen beider Bänder sind geeignete Mittel, wie beispielsweise eine zusätzliche Vorratsspule für das abschirmende Band, vorgesehen. Besonders vorteilhaft hat sich erwiesen, das nichtbesprochene Band aus einem Material großer Permeabilität und Koerzitivkraft zu wählen, z. B. den unter der Bezeichnung Magnetoflex bekannten Werkstoff. Der Schutz des Tonbands gegen Fremdfelder durch die erfindungsgemäße Maßnahme ermöglicht die Aufnahme auch in von starken Störfeldern durchsetzten ]Zäumen sowie die Aufbewahrung der Rollen ohne besondere Schutzmaßnahmen.According to the known working method, Ma-. gnetton tapes after the Discussing wound with no liner on the reel. The superimposed Belt parts influence each other through their respective magnetization and thus cause the so-called copying effect. Also intermediate layers made of non-magnetic Material could not completely eliminate this copying effect. According to the invention these disturbances can be avoided if one does not speak with the tape recorder Tape made of ferromagnetic material, preferably of the same width, is wound up, see above <leave each layer of the tape from the next through a magnetically shielding one Interlayer is separated. Suitable for winding up both tapes together Means, such as an additional supply reel for the shielding tape, intended. It has been found to be particularly advantageous to turn off the band that has not been discussed to choose a material of great permeability and coercivity, e.g. B. the under known as Magnetoflex. The protection of the tape against external fields by the measure according to the invention enables the inclusion even in of strong Interfering fields interspersed] bridles as well as the storage of the roles without special Protective measures.

Einzelheiten der Erfindung sind beispielsweise aus der schematischen Zeichnung ersichtlich.Details of the invention are for example from the schematic Drawing visible.

Das Tonband i läuft zusammen mit einem Stahlband 2 von der Vorratsspule 3 ab. Während das Tonhand über die Wenderollen .4 an den Tonköpfen 5 vorbeigeführt wird und einen für die akustische Aufnahme charakteristischen, örtlich begrenzten remanenten Magnetismus erhält, läuft das Stahlband 2, gegen die Felder der Tonköpfe abgeschirmt, direkt zu der Bandspule 6, auf der es zusammen mit dem Tonland wieder aufgespult wird.The tape i runs together with a steel tape 2 from the supply reel 3 from. While the clay hand is guided past the clay heads 5 over the turning rollers .4 and a localized one that is characteristic of the acoustic recording Retains magnetism, the steel tape 2 runs against the fields of the tape heads shielded, directly to the reel 6, on which it again together with the sound land is wound up.

Claims (3)

PATENTANSPRÜCHE: i. Verfahren zum Vermeiden des Kopiereffekts bei aufgespulten Magnettonbändern durch gleichzeitiges Aufspulen des Magnettonbands und eines unbesprochenen Bands, dadurch gekennzeichnet, daß für dieses Band ein ferromagnetischer Werkstoff gewählt wird. PATENT CLAIMS: i. Procedure for avoiding the copy effect wound magnetic tape by simultaneously winding the magnetic tape and an unspoken tape, characterized in that a ferromagnetic material is selected. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß das Tonband und das nichtbesprochene Band von derselben Vorratsspule abgewickelt, dann jedoch so getrennt geführt werden, daß nur das Tonhand über die Tonköpfe läuft. 2. The method according to claim i, characterized characterized in that the tape and the unrecognized tape are from the same supply reel unwound, but then separated so that only the clay hand over the Tape heads running. 3. Verfahren nach Anspruch t oder 2, dadurch gekennzeichnet, daß man als nichtbesprochenes Band ein solches von großer Permeabilität und Koerzitivkraft verwendet. Vorrichtung zur Ausül>utig des Verfahrens nach einem der Ansprüche i bis 3, dadurch gekennzeichnet, daß Mittel zum gemeinsamen Aufspulen des besprochenen Tonbands und eines nichtbesprochenen Bands aus ferromagnetischem Material, vorzugsweise gleicher Breite, vorgesehen sind. Angezogene Druckschriften: Schweizerische Patentschrift Nr. i5oo.l5.3. The method according to claim t or 2, characterized in that the band that has not been discussed is one of great permeability and coercive force used. Device for executing the method according to one of claims i to 3, characterized in that means for the common winding of the discussed Audio tape and an undisclosed tape of ferromagnetic material, preferably same width are provided. Printed publications: Swiss patent specification No. i5oo.l5.
DES20814A 1950-11-08 1950-11-08 Process for eliminating the copying effect in magnetic tapes and device for practicing the process Expired DE846801C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES20814A DE846801C (en) 1950-11-08 1950-11-08 Process for eliminating the copying effect in magnetic tapes and device for practicing the process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES20814A DE846801C (en) 1950-11-08 1950-11-08 Process for eliminating the copying effect in magnetic tapes and device for practicing the process

Publications (1)

Publication Number Publication Date
DE846801C true DE846801C (en) 1952-08-18

Family

ID=7476189

Family Applications (1)

Application Number Title Priority Date Filing Date
DES20814A Expired DE846801C (en) 1950-11-08 1950-11-08 Process for eliminating the copying effect in magnetic tapes and device for practicing the process

Country Status (1)

Country Link
DE (1) DE846801C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH150045A (en) * 1929-09-25 1931-10-15 Telegraphie Patent Syndikat Electromagnetic sound recording tape.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH150045A (en) * 1929-09-25 1931-10-15 Telegraphie Patent Syndikat Electromagnetic sound recording tape.

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