DE2930974A1 - Magnetic tape film recording - has trapezoidal perforations to give clear indication of direction of recording - Google Patents

Magnetic tape film recording - has trapezoidal perforations to give clear indication of direction of recording

Info

Publication number
DE2930974A1
DE2930974A1 DE19792930974 DE2930974A DE2930974A1 DE 2930974 A1 DE2930974 A1 DE 2930974A1 DE 19792930974 DE19792930974 DE 19792930974 DE 2930974 A DE2930974 A DE 2930974A DE 2930974 A1 DE2930974 A1 DE 2930974A1
Authority
DE
Germany
Prior art keywords
recording
perforations
magnetic tape
clear indication
tape
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.)
Granted
Application number
DE19792930974
Other languages
German (de)
Other versions
DE2930974C2 (en
Inventor
Guenter Ing Grad Gebuhr
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19792930974 priority Critical patent/DE2930974C2/en
Publication of DE2930974A1 publication Critical patent/DE2930974A1/en
Application granted granted Critical
Publication of DE2930974C2 publication Critical patent/DE2930974C2/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
    • G11B23/38—Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
    • G11B23/40—Identifying or analogous means applied to or incorporated in the record carrier and not intended for visual display simultaneously with the playing-back of the record carrier, e.g. label, leader, photograph
    • 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
    • G11B23/14—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 providing ability to repeat location, e.g. using sprocket holes

Landscapes

  • Magnetic Record Carriers (AREA)

Abstract

A magnetic tape with perforations as used with film recordings is designed to avoid mistakes in cutting and splicing due to there being no clear indication of the tape recording direction. Instead of using rectangular section perforated holes, a trapezoidal section is used. Typically, the perforations will have a minimum size of 1mm long and 0.6 mm. In the direction of tape travel the sides of the perforations are tapered with a side angle of 45 degrees. When cut, the tapered sides of the perforations give a clear indication of the direction of recording.

Description

Perforiertes Magnetband mit RichtungsmarkierungPerforated magnetic tape with direction markings

Stand der Technik: Perforiertes Magnetband für die Filmvertonung ist bekannt.State of the art: Perforated magnetic tape for film dubbing is known.

Es ist entweder mit Rund- oder Langlöchern versehen. Langlöcher haben den Vorteil, daß sie nur so breit gewählt werden, wie der Rasen zwischen den Tonspuren ist. Somit werden auch bei Quadrofonie keine Tonkanäle unbrauchbar.It is provided with either round or elongated holes. Have elongated holes the advantage that they are only chosen as wide as the lawn between the soundtracks is. This means that no sound channels are unusable even with quadraphony.

Jedoch haben perforierte Magnetbänder, wenn sie mit Mittenperforation versehen sind, den Nachteil, daß beim Schneiden eine Richtungsmarkierung nicht vorhanden ist und somit insbesondere bei kurzen Bandstücken leicht Fehler auftreten können. Dies läßt sich jedoch mit einer zusätzlichen Richtungsmarkierung leicht vermeiden.However, perforated magnetic tapes have a central perforation are provided, the disadvantage that a direction marking is not available when cutting and therefore errors can easily occur, especially with short pieces of tape. However, this can easily be avoided with an additional direction marker.

Beschreibung der Anmeldung Durch eine besondere Gestaltung des Perforationsioches ist es möglich, ohne zusätzlichen Herstellungsaufwand die Richtungsmarkierung mit einzuarbeiten. Dabei wird die Breite der Löcher so gewählt, daß sie innerhalb der nicht bespielten Mittelzone der Tonspuren Platz finden. Die gesamte Länge des Loches sollte so gewählt werden, daß bei einer Bandgeschwindigkeit von 4,75 cm/sec und einer Bildfrequenz von 25 Bd/sec noch genügend Magnetband zwischen den einzelnen Löchern stehen bleibt, um die mechanische Festigkeit nicht unnötig zu reduzieren.Description of the application Through a special design of the perforation hole it is possible to use the directional marking without additional manufacturing effort to incorporate. The width of the holes is chosen so that they are within the find space in the unrecorded middle zone of the soundtracks. The entire length of the hole should be chosen so that at a belt speed of 4.75 cm / sec and At a frame rate of 25 Bd / sec, there is still enough magnetic tape between each Holes remains in order not to reduce the mechanical strength unnecessarily.

Damit ist es möglich, auch Kassetten mit perforiertem Magnetband zu füllen0 Bei der Verwendung eines trapezförmigen Loches ist zusätzlich die Vor- und Rückseite eindeutig gekennzeichnet. Für diesen Fall empfehlen sich als Beispiel folgende Maße: Ausgehend von einem Rechteck mit einer Länge von 1,0 mm und einer Breite von 0,6 mm wird das in Laufrichtung und oben liegende Eck bis auf die Basislinie mit einem Winkel von 450 abgeschrägt.This makes it possible to also use cassettes with perforated magnetic tape fill0 When using a trapezoidal hole is additional the front and back are clearly marked. In this case we recommend as an example, the following dimensions: starting from a rectangle with a length of 1.0 mm and a width of 0.6 mm is the corner lying in the running direction and on top beveled to the baseline at a 450 angle.

Dieses Perforationsloch beinhaltet nun die Richtungs-und Seitenmarkierung und ist in der Regel mit bloßem Auge gut zu erkennen. Verwendet man zusätzlich als Trägerband ein Spezialband, dessen Rückseite leicht beschriftbar ist, so kann die Arbeit weiter erleichtert werden.This perforation hole now contains the direction and side markings and is usually easy to see with the naked eye. If you also use it as Carrier tape is a special tape, the back of which is easy to write on, so the Work to be further facilitated.

Als Alternative bietet sich an, die Richtungsmarkierung auf der Rückseite zusammen mit zum Beispiel einer Kennzeichnung der Bandsorte und der Herstellerfirma aufzudrucken.An alternative is the direction mark on the back together with, for example, an identification of the type of tape and the manufacturer to print.

Claims (5)

Patentansprüche: Tonträger für alle Anwendungen dadurch gekennzeichnet, daß er über eine Reihe von Perforationslöchern und eine Richtungsmarkierung verfügt.Claims: Sound carriers for all applications characterized by that it has a series of perforation holes and a direction marker. 2. Tonträger für alle Anwendungen nach Anspruch 1 dadurch gekennzeichnet, daß keine Tonspuren unbrauchbar werden.2. Sound carrier for all applications according to claim 1, characterized in that that no soundtracks become unusable. 3. Tonträger für alle Anwendungen nach den Ansprüchen 1-2 dadurch gekennzeichnet, daß auch Kassetten mit ihm gefüllt werden können.3. Sound carrier for all applications according to claims 1-2 thereby characterized in that cassettes can also be filled with it. 4. Tonträger für alle Anwendungen nach den Ansprüchen 1-3 dadurch gekennzeichnet, daß Vor- und Rückseite leicht erkennbar sind.4. Sound carrier for all applications according to claims 1-3 thereby marked that the front and back are easily recognizable. 5. Tonträger für alle Anwendungen nach den Ansprüchen 1-4 dadurch gekennzeichnet, daß die Rückseite beschriftbar ist.5. Sound carrier for all applications according to claims 1-4 thereby marked that the back can be written on.
DE19792930974 1979-07-31 1979-07-31 Magnetic recording tape with perforation holes Expired DE2930974C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792930974 DE2930974C2 (en) 1979-07-31 1979-07-31 Magnetic recording tape with perforation holes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792930974 DE2930974C2 (en) 1979-07-31 1979-07-31 Magnetic recording tape with perforation holes

Publications (2)

Publication Number Publication Date
DE2930974A1 true DE2930974A1 (en) 1981-02-19
DE2930974C2 DE2930974C2 (en) 1986-10-16

Family

ID=6077215

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792930974 Expired DE2930974C2 (en) 1979-07-31 1979-07-31 Magnetic recording tape with perforation holes

Country Status (1)

Country Link
DE (1) DE2930974C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3113390A1 (en) * 1981-04-02 1982-10-21 Agfa-Gevaert Ag, 5090 Leverkusen Magnetic-tape cassette

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7632096U1 (en) * 1900-01-01 Poetter, Bernhard, 6112 Gross-Zimmern
DE2319655A1 (en) * 1973-04-18 1974-11-14 William Carlton Kinard TAPE WITH SIDE AND DIRECTION INDICATION

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7632096U1 (en) * 1900-01-01 Poetter, Bernhard, 6112 Gross-Zimmern
DE2319655A1 (en) * 1973-04-18 1974-11-14 William Carlton Kinard TAPE WITH SIDE AND DIRECTION INDICATION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3113390A1 (en) * 1981-04-02 1982-10-21 Agfa-Gevaert Ag, 5090 Leverkusen Magnetic-tape cassette

Also Published As

Publication number Publication date
DE2930974C2 (en) 1986-10-16

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8110 Request for examination paragraph 44
8101 Request for examination as to novelty
8105 Search report available
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee