EP0056799A4 - Indicator device for cassettes loaded with magnetical information carrier. - Google Patents

Indicator device for cassettes loaded with magnetical information carrier.

Info

Publication number
EP0056799A4
EP0056799A4 EP19800902166 EP80902166A EP0056799A4 EP 0056799 A4 EP0056799 A4 EP 0056799A4 EP 19800902166 EP19800902166 EP 19800902166 EP 80902166 A EP80902166 A EP 80902166A EP 0056799 A4 EP0056799 A4 EP 0056799A4
Authority
EP
European Patent Office
Prior art keywords
casette
indicator
window
face
indicator device
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.)
Withdrawn
Application number
EP19800902166
Other languages
German (de)
French (fr)
Other versions
EP0056799A1 (en
Inventor
Marcell Janosi
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.)
Budapesti Radiotechnikai Gyar
Original Assignee
Budapesti Radiotechnikai Gyar
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 Budapesti Radiotechnikai Gyar filed Critical Budapesti Radiotechnikai Gyar
Publication of EP0056799A1 publication Critical patent/EP0056799A1/en
Publication of EP0056799A4 publication Critical patent/EP0056799A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/04—Preventing, inhibiting, or warning against accidental erasing or double recording
    • 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
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • 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
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/04—Magazines; Cassettes for webs or filaments
    • G11B23/041—Details
    • G11B23/042—Auxiliary features
    • 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
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/04—Magazines; Cassettes for webs or filaments
    • G11B23/08—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends
    • G11B23/087—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends using two different reels or cores
    • G11B23/08707—Details
    • G11B23/0875—Indicating means, e.g. quantity of tape
    • 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

Definitions

  • the invention relates to an indicator device for casettes loaded with magnetical information carrier that can be the widely used standardized compact casettes for magnetic tapes, or specially designed casettes comprising flexible magnetical discs for information recording.
  • indicator devices are already used on such casettes, and the information contents of these indicator devices can be read out by appropriate detecting mechanisms.
  • On the rear edge face of the most commonly used standard compact casettes such indicator devices are formed by tabs which are cut out from the casette material at their fourth sides. Such tabs cover respective recesses in the casette body. When such a tab is removed, this will be detected by a mechanism in the tape recorder which prevents the recorded information from being erased by blocking the recording mode of operation of the tape recorder.
  • a similar indicator device is used in chromiumdioxid casettes for which special magnetical bias should be applied during playback and recording.
  • the indicator devices used in compact casettes have several drawbacks.
  • This irreversibility is advantageous in many cases, but there are fields of applications, in which the possibility of changing the already set indicating information is required.
  • the location of the indicator device in the rear edge face of the casette is also not advantageous, because the recorder/playback device should be designed with such sizes to be able to give room to the detecting mechanism which has the task of reading the information associated with the indicator device. This requirement is particularly unpleasant in case of front loaded casette decks, because thereby the minimum height of such decks is increased.
  • casette stores For automation of recording and/or playback, of casettes, special casette stores are required that enable automated casette insertion in recorder and/ or playback devices.
  • the primary object of the present invention is to provide an indicator device, by means of which the indicated information ean be stored with high stability, however, with the possibility of subsequent changes in the stored information content, and which has a simple and inexpensive constructional design and takes few room from the casette volume.
  • a further object of the invention is to provide a device that can simply assure, the always correct insertion of casettes loaded with flexible magnetical information carrier discs in casette stores.
  • an indicator device for casettes loaded with magnetical information carriers, in which one of the faces of the casette defines a window, an indicator block is located and guided for a sliding movement between at least two discrete fixed positions in the window, a positioning means is provided to fix the indicator block in said discrete positions, and the free surfaces of the window covered or uncovered by the indicator block are in respective planes with different heights so that the height difference can well be detected by appropriate detecting means.
  • a device for casettes loaded with flexible magnetical information carrier discs, in which one of the shorter side walls of the casette define a guide slot extending through the full height of the casette which is arranged asymmet rically compared to the imaginary center line of the casette.
  • FIG. 1 shows the axonometric view of a standard compact casette comprising the indicator device according to the invention in its rear edge face;
  • FIG. 2 shows the schematical axonometric view of a casette loaded with flexible magnetical information carrier disc, comprising the indicator device according to the invention on its upper face;
  • FIG.3 shows the top view of the casette of FIG. 2;
  • FIG. 4 shows the side view of the casette shown in
  • FIG. 3 partly in section;
  • FIG. 5 shows the elevation view of the casette of FIG. 3;
  • FIG. 6 shows an enlarged axonometrical detail of a casette wall comprising a window for locating the indicator device according to the invention
  • FIG. 7 shows an enlarged axonometric view of the sliding member of the indicator device according to the invention
  • FIG. 8 shows an enlarged axonometric detail of an inner casette wall supporting the sliding member of FIG. 7.
  • FIG. 1 shows a conventional compact casette with a rear edge face, in which instead of the commonly used removable indicator tabs, a first embodiment of the indicator device according to the present invention is illustrated.
  • the indicator device comprises a window 10 defined in the rear edge face of the casette, end an indicator block 11 located and guided in the window 10.
  • the indicator block 11 In longitudinal direction the indicator block 11 is shorter than the window 10, preferably shorter than or at most equal to the half length thereof, and the block 11 can slide in the. window between two fixed end positions.
  • the indicator block 11 covers the left part of the window 10. In that case the free face of the indicator block 11 flushes with the plane of the rear edge of the casette.
  • the part of the window 10 which is uncovered by the indicator block 11 defines an indicator recess 12.
  • the free bottom surface of the indibator recess 12 is substantially parallel to the rear edge of the casette and it lies inwardly compared thereto.
  • the indicator block 11 When the indicator block 11 is slid in the window 10 into the second fixed position, then the indicator recess 12 will be at the other (left) side of the window 10. It can be seen, that the. relative position of the indicator block 11 and indicator recess 12 within the window 10 may carry information that can be detected by a suitable detecting means attached to the window 10.
  • the indicator block 11 defines depression 13 for facilitating its lateral movement.
  • the position of the indicator device can indicate the "further recording is allowed resp. inhibited" condition, a particular characteristic of the magnetical information carrier (tape) loaded in the casette (e.g. CrO 2 tape or normal tape), or any other information that can be significant when the casette is used.
  • a particular characteristic of the magnetical information carrier (tape) loaded in the casette e.g. CrO 2 tape or normal tape
  • FIG. 2 shows a further way of application of the indicator device according to the invention.
  • the casette is loaded by a flexible magnetical information recording disc instead of the conventional magnetic tape, and such disc is capable of storing information in a manner similar to the information storage in mini-floppy applications.
  • FIG. 2 shows only those parts of such a casette that are important for understanding the present invention.
  • indicator block 23 In the oblong-like windows indicator block 23 is located in a far position from the wide edge of the casette, while indicator blocks 24 and 25 are in close positions to the wide casette edge.
  • the side by side arrangement of the three indicator devices is preferable, because that can facilitate the design of the associated three detecting means (not shown).
  • the above described arrangement is preferable in view of the applications of the casette, because if the indicator devices are arranged in the largest face of the casette, then the size of the recorder/playback unit will not be increased due to the presence of the detecting means associated with the indicator devices in the recorder playback unit.
  • one of the shorter side edge surfaces of the casette defines an out wardly open guiding slot 26 being offset from the imaginary center line of the casette. Owing to the asymmetrical location of the guiding slot 26 it will be possible to insert such casettes, loaded with flexible magnetical information carrier discs, in a suitable casette store. If in the casette store (not shown) an appropriate guiding rod is provided that fits in the guiding slots 26 of the casettes inserted in the store, then the casette insertion can be done only with a predetermined relative casette position with respect to the store.
  • the guiding slot 26 is closed only from three sides, which is in contrast to conventional side indicating recesses that are closed from five sides, i. ⁇ . they are open only from their faces.
  • FIGs. 3, 4 and 5 show further details of the indicator device illustrated in FIG. 2.
  • FIG. 3 corresponds substantially to the top view of the casette shown in FIG. 2.
  • the casette has 1 a comparatively thick upper wall 30 in the region of the windows which is supported from below by a separate support wall 31.
  • the indicator blocks 23, 24 and 25 comprise respective widened bottom parts which are guided between the upper wall 30 and the support wall 31.
  • the sectional view of FIG. 4 shows the open indicator recess of the indicator device 20 having a depth "d". When the associated indicator block is moved into its other position, the depth "d" will be practically zero.
  • a typical value for the depth "d" is between about 2 - 2,5 mm which is sufficient for instrumental depth detection.
  • FIG. 5 shows the elevation view of the guiding slot 26. It can be understood that the casette can be slid normal to the face plane if. a guiding rod (not shown) of a. casette store engages the guiding slot 26, which can facilitate automatic casette loading.
  • FIGs 6, 7 and 8 show enlarged details of a preferable embodiment of the indicator device according to the invention.
  • FIG. 6 shows a detail of the upper wall 30 of a casette defining an oblong-like window 10.
  • FIG. 7 shows, a slidable moving part, and the indicator block 11 is jumping out of the surface of the moving part.
  • the indicator block 11 fits in the window 10.
  • a wedge-shaped groove 15 extends across the bottom of .the moving part 14 in the middle region thereof, and the left end of the moving part is provided with a flanked edge 16, the angle of which corresponding to that of the groove 15.
  • FIG. 8 shows ah enlarged detail of the support wall 31, on which a transversal wedge-like rib 32 is provided. If the elements shown separately in FIGs.
  • the engagement is, however, stable enough to maintain any set position of the indicator device through a long period of time.
  • the number of the indicator devices arranged beside each other is determined by the requirements for indication being characteristic to the casette system. It is preferable, however, to provide room for additional indicator devices even if such additional devices are not required in given conditions, because technical development might increase later the need for indication.

Abstract

Indicator device for cassettes loaded with magnetical information carriers, in which one of the faces of the cassette defines a window, an indicator block is located and guided for a sliding movement between at least two discrete fixed positions in the window, a positioning means is provided to fix the indicator block in said discrete positions, and the free surfaces of the window covered or uncovered by the indicator block are in respective planes with different heights so that the height difference can well be detected by appropriate detecting means.

Description

"INDICATOR DEVICE FOR CASETTES LOADED WITH MAGNETICAL INFORMATION CARRIER"
BACKGROUND OF THE INVENTION
The invention relates to an indicator device for casettes loaded with magnetical information carrier that can be the widely used standardized compact casettes for magnetic tapes, or specially designed casettes comprising flexible magnetical discs for information recording.
Various types of indicator devices are already used on such casettes, and the information contents of these indicator devices can be read out by appropriate detecting mechanisms. On the rear edge face of the most commonly used standard compact casettes such indicator devices are formed by tabs which are cut out from the casette material at their fourth sides. Such tabs cover respective recesses in the casette body. When such a tab is removed, this will be detected by a mechanism in the tape recorder which prevents the recorded information from being erased by blocking the recording mode of operation of the tape recorder. A similar indicator device is used in chromiumdioxid casettes for which special magnetical bias should be applied during playback and recording. In that case a recess is formed at the rear face of the casette that represents the information to be indicated (the CrO2 tape), and this information can be read out in recent tape recorders to change the bias accordingly. It has been already proposed in the Hungarian patent 170.790 to load a flexible magnetical information carrier disc in casette, whereby an information recording system can be designed that is similar to the well-known "mini-floppy" system but it uses casettes and makes use of the advantages of casette technique. In this casette system there is a need of indicating several information which is characteristic to the casette and/or to the mode of recording, etc. that can be read out automatically.
The indicator devices (removable tabs) used in compact casettes have several drawbacks. First, the recording of the information associated with such devices is irreversible, i.e. final. After removal of the tab, the original condition cannot be adjusted, any more. This irreversibility is advantageous in many cases, but there are fields of applications, in which the possibility of changing the already set indicating information is required. The location of the indicator device in the rear edge face of the casette is also not advantageous, because the recorder/playback device should be designed with such sizes to be able to give room to the detecting mechanism which has the task of reading the information associated with the indicator device. This requirement is particularly unpleasant in case of front loaded casette decks, because thereby the minimum height of such decks is increased.
For automation of recording and/or playback, of casettes, special casette stores are required that enable automated casette insertion in recorder and/ or playback devices. In such casette stores provision should be made for inhibiting the inappropriate insertion of the casettes in the store i.e. each casette should be loaded in identical, predetermined position in the store. This requirement cannot be satisfied automatically by means of conventional casett e designs.
OBJECT OF THE INVENTION The primary object of the present invention is to provide an indicator device, by means of which the indicated information ean be stored with high stability, however, with the possibility of subsequent changes in the stored information content, and which has a simple and inexpensive constructional design and takes few room from the casette volume.
A further object of the invention is to provide a device that can simply assure, the always correct insertion of casettes loaded with flexible magnetical information carrier discs in casette stores.
SUMMARY OF THE INVENTION
According to the first aspect of the present invention an indicator device has been provided for casettes loaded with magnetical information carriers, in which one of the faces of the casette defines a window, an indicator block is located and guided for a sliding movement between at least two discrete fixed positions in the window, a positioning means is provided to fix the indicator block in said discrete positions, and the free surfaces of the window covered or uncovered by the indicator block are in respective planes with different heights so that the height difference can well be detected by appropriate detecting means. According to the second aspect of the presentinvention a device has been provided for casettes loaded with flexible magnetical information carrier discs, in which one of the shorter side walls of the casette define a guide slot extending through the full height of the casette which is arranged asymmet rically compared to the imaginary center line of the casette.
The invention will now be described in connection with preferable embodiments thereof, in which reference will be made to the accompanying drawings.
SHORT DESCRIPTION OF THE DRAWINGS
FIG. 1 shows the axonometric view of a standard compact casette comprising the indicator device according to the invention in its rear edge face;
FIG. 2 shows the schematical axonometric view of a casette loaded with flexible magnetical information carrier disc, comprising the indicator device according to the invention on its upper face;
FIG.3 shows the top view of the casette of FIG. 2; FIG. 4 shows the side view of the casette shown in
FIG. 3, partly in section; FIG. 5 shows the elevation view of the casette of FIG. 3;
FIG. 6 shows an enlarged axonometrical detail of a casette wall comprising a window for locating the indicator device according to the invention; FIG. 7 shows an enlarged axonometric view of the sliding member of the indicator device according to the invention; and FIG. 8 shows an enlarged axonometric detail of an inner casette wall supporting the sliding member of FIG. 7.
DETAILED DESCRIPTION OF THE PREFERABLE EMBODIMENTS
FIG. 1 shows a conventional compact casette with a rear edge face, in which instead of the commonly used removable indicator tabs, a first embodiment of the indicator device according to the present invention is illustrated. The indicator device comprises a window 10 defined in the rear edge face of the casette, end an indicator block 11 located and guided in the window 10. In longitudinal direction the indicator block 11 is shorter than the window 10, preferably shorter than or at most equal to the half length thereof, and the block 11 can slide in the. window between two fixed end positions. In the position shown in FIG. 1 the indicator block 11 covers the left part of the window 10. In that case the free face of the indicator block 11 flushes with the plane of the rear edge of the casette. The part of the window 10 which is uncovered by the indicator block 11 defines an indicator recess 12. The free bottom surface of the indibator recess 12 is substantially parallel to the rear edge of the casette and it lies inwardly compared thereto.
When the indicator block 11 is slid in the window 10 into the second fixed position, then the indicator recess 12 will be at the other (left) side of the window 10. It can be seen, that the. relative position of the indicator block 11 and indicator recess 12 within the window 10 may carry information that can be detected by a suitable detecting means attached to the window 10.
The indicator block 11 defines depression 13 for facilitating its lateral movement.
In case of a standard compact casette, the position of the indicator device can indicate the "further recording is allowed resp. inhibited" condition, a particular characteristic of the magnetical information carrier (tape) loaded in the casette (e.g. CrO2 tape or normal tape), or any other information that can be significant when the casette is used.
FIG. 2 shows a further way of application of the indicator device according to the invention. In that case the casette is loaded by a flexible magnetical information recording disc instead of the conventional magnetic tape, and such disc is capable of storing information in a manner similar to the information storage in mini-floppy applications.
FIG. 2 shows only those parts of such a casette that are important for understanding the present invention.
In the largest free face surface of the casette, adjacent to one of its corners three indicator devices 20, 21 and 22 are shown located side by side to each other, and they are designed in the same way as the indicator device shown in FIG. 1.
In the oblong-like windows indicator block 23 is located in a far position from the wide edge of the casette, while indicator blocks 24 and 25 are in close positions to the wide casette edge. The side by side arrangement of the three indicator devices is preferable, because that can facilitate the design of the associated three detecting means (not shown). The above described arrangement is preferable in view of the applications of the casette, because if the indicator devices are arranged in the largest face of the casette, then the size of the recorder/playback unit will not be increased due to the presence of the detecting means associated with the indicator devices in the recorder playback unit. This can be understood by considering the fact that the recorder/playback unit must be sufficiently deep in the direction normal to the largest face of the casette to accomodate thecasette drive and the recording/playback heads, and this depth will not be increased by the presence of the detecting means associated with the indicator devices being generally smaller than the drive.
It can be seen in FIG. 2 that one of the shorter side edge surfaces of the casette defines an out wardly open guiding slot 26 being offset from the imaginary center line of the casette. Owing to the asymmetrical location of the guiding slot 26 it will be possible to insert such casettes, loaded with flexible magnetical information carrier discs, in a suitable casette store. If in the casette store (not shown) an appropriate guiding rod is provided that fits in the guiding slots 26 of the casettes inserted in the store, then the casette insertion can be done only with a predetermined relative casette position with respect to the store. The guiding slot 26 is closed only from three sides, which is in contrast to conventional side indicating recesses that are closed from five sides, i. θ. they are open only from their faces. The presence of the throughgoing guiding slot 26 is preferable in case of automatic casette storage, because it enables the lateral sliding movement of the casettes in the store. FIGs. 3, 4 and 5 show further details of the indicator device illustrated in FIG. 2. FIG. 3 corresponds substantially to the top view of the casette shown in FIG. 2. It can be seen in FIG. 4 that the casette has1 a comparatively thick upper wall 30 in the region of the windows which is supported from below by a separate support wall 31. The indicator blocks 23, 24 and 25 comprise respective widened bottom parts which are guided between the upper wall 30 and the support wall 31. The sectional view of FIG. 4 shows the open indicator recess of the indicator device 20 having a depth "d". When the associated indicator block is moved into its other position, the depth "d" will be practically zero. A typical value for the depth "d" is between about 2 - 2,5 mm which is sufficient for instrumental depth detection.
FIG. 5 shows the elevation view of the guiding slot 26. It can be understood that the casette can be slid normal to the face plane if. a guiding rod (not shown) of a. casette store engages the guiding slot 26, which can facilitate automatic casette loading.
FIGs 6, 7 and 8 show enlarged details of a preferable embodiment of the indicator device according to the invention. FIG. 6 shows a detail of the upper wall 30 of a casette defining an oblong-like window 10. FIG. 7 shows, a slidable moving part, and the indicator block 11 is jumping out of the surface of the moving part. The indicator block 11 fits in the window 10. A wedge-shaped groove 15 extends across the bottom of .the moving part 14 in the middle region thereof, and the left end of the moving part is provided with a flanked edge 16, the angle of which corresponding to that of the groove 15. FIG. 8 shows ah enlarged detail of the support wall 31, on which a transversal wedge-like rib 32 is provided. If the elements shown separately in FIGs. 6, 7 and 8 are combined in a casette as illustrated in FIG. 3, then in a first fixed position of the moving part 14 the groove 14 engages the rib 32, as in case of indicator devices 21 and 22 of FIG. 2. In the other fixed position of the moving part 14 the flanked edge 16 abuts to a corresponding flanking surface of the rib 32 that fixes the position of the moving part 14. If an appropriate tool (e.g. a tip of a screw driver) is inserted in the depression 13 of the indicator block 11, and sufficiently high sliding force is applied on the tool, the support wall 31 will move away elastically from the upper wall 30 and the engagement of the moving part 14 gets released, whereby the moving part 14 can be slid in the other position. The engagement is, however, stable enough to maintain any set position of the indicator device through a long period of time. The number of the indicator devices arranged beside each other is determined by the requirements for indication being characteristic to the casette system. It is preferable, however, to provide room for additional indicator devices even if such additional devices are not required in given conditions, because technical development might increase later the need for indication.

Claims

What is claimed is:
1. An indicator device for casettes loaded with magnetical information carrier, comprising a window defined in one of the faces of said casette, an indicator block located and guided in said window for unidirectional sliding movement, a means for fixing said indicator block at least in two discrete positions in said window, in which the face of said indicator block being in a different depth than the bottom surface of said window part left uncovered by said indicator block.
2. The indicator device as claimed in claim l, in which said face of said indicator block substantially flushing said casette face defining said window. 3. The indicator device as claimed in claim 2, wherein said face of said indicator block defining a depression for insertion of a tool applying a sliding force.
4. The indicator device as claimed in claim 2, in which said indicator block having a length in said direction of sliding movement being at most equal to the half length of said window in the same direction.
5. The indicator device, as claimed in claim 1, in which said indicator block being built integrally with a moving part, said moving part fully covering said window and extending over the edges of at least two sides of said window below said casette face, said moving part defining on its rear face opposite to said window a transversal groove and a flanked edge, a support wall abutting said rear face of said moving part, said support wall comprising a transversal rib engaging respectively said groove and said flanked edge in said two discrete positions of said indicator block
6. The indicator device as claimed in claim 1, in which said window being defined in the vicinity of a corner region of the largest face of said casette. 7. The indicator device as claimed in claim 1, in which said window being defined in the rear edge face of said casette.
8. A device for locating oblong-shaped casettes loaded with flexible magnetical information carrier disc, wherein a short side face of said casette defining a guiding slot extending through the full height of said casette, and said guiding slot being positioned asymmetrically relative to the imaginary center line of said casette.
EP19800902166 1980-09-01 1980-08-05 Indicator device for cassettes loaded with magnetical information carrier. Withdrawn EP0056799A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE885013 1980-09-01
BE0/201934A BE885013A (en) 1980-09-01 1980-09-01 INDICATOR DEVICE FOR CASSETTES CONTAINING MAGNETIC INFORMATION MEDIUM

Publications (2)

Publication Number Publication Date
EP0056799A1 EP0056799A1 (en) 1982-08-04
EP0056799A4 true EP0056799A4 (en) 1984-09-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800902166 Withdrawn EP0056799A4 (en) 1980-09-01 1980-08-05 Indicator device for cassettes loaded with magnetical information carrier.

Country Status (4)

Country Link
EP (1) EP0056799A4 (en)
BE (1) BE885013A (en)
CA (1) CA1161553A (en)
WO (1) WO1981001907A1 (en)

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BE885013A (en) 1980-12-31
CA1161553A (en) 1984-01-31
EP0056799A1 (en) 1982-08-04
WO1981001907A1 (en) 1981-07-09

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