EP0429589A1 - Cartouche compacte a haute capacite de memorisation pour magnetophones de precision - Google Patents

Cartouche compacte a haute capacite de memorisation pour magnetophones de precision

Info

Publication number
EP0429589A1
EP0429589A1 EP19900908371 EP90908371A EP0429589A1 EP 0429589 A1 EP0429589 A1 EP 0429589A1 EP 19900908371 EP19900908371 EP 19900908371 EP 90908371 A EP90908371 A EP 90908371A EP 0429589 A1 EP0429589 A1 EP 0429589A1
Authority
EP
European Patent Office
Prior art keywords
tape
cartridge
hubs
enclosure
reels
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Withdrawn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
EP19900908371
Other languages
German (de)
English (en)
Inventor
John Milton Favrou
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of EP0429589A1 publication Critical patent/EP0429589A1/fr
Withdrawn legal-status Critical Current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
    • G11B23/02—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

Definitions

  • This invention relates to a magnetic tape cartridge, and in particular to a low cost, high storage capacity, compact cartridge.
  • Magnetic storage devices such as magnetic tape drives and magnetic disk units, are indispensable components of modern computers and data processing systems. Tape drives are used for archival storage of data and programs, while disk units serve as quick access storage means for operating systems and programs, data storage of computational results and word processing outputs. With continuing trends toward higher speed and higher capacity digital processors, the need for higher transfer rate and increased storage capacity magnetic storage devices is also rising. Much of the current growth is directed towards small office systems, computer work stations and personal computing systems for home use. Magnetic storage devices suitable for use in these areas must not only meet increasing processor speed and storage demands, but must also be reliable, inexpensive, and spatially compact. Advances directed towards meeting the above goals are ongoing in the art.
  • a compact cartridge for storing approximately 720 feet of 0.25" wide magnetic tape comprises a two section plastic shell containing two reel spools and associated hubs adapted for mating with turntables driven by the reeling motors mounted on a precision plate of an associated tape transport.
  • the tape is wound on the cartridge spools with the recording surface of the tape facing inward towards the cartridge.
  • the tape is transportable from reel to reel for operation in either a forward or reverse direction, with a span of tape extending between the reels for contacting the heads and guides mounted on the recorder.
  • the cartridge is manually inserted into an opening in the front face of the recorder, and upon the closing of the door of the transport, the cartridge is axially lowered onto the reel motor turntables.
  • a firm, solid connection with no play between the reel motor turntables and the cartridge hubs is required to prevent induced flutter in the tape. This is denoted as a "zero clearance" fit between the reel turntables and cartridge hubs which maintains flutter free tape motion by control of wobble and eccentricity at the mating connection.
  • the zero clearance fit is required as tape speed is totally under control of the transport reeling system: there is no conventional capstan in the transport for metering tape speed.
  • the cartridge stores 2 gigabytes of data on about 720 feet of tape.
  • the linear packing density is 80 kilobits per inch. Because of the extremely high packing density, intimate contact between the tape and heads is an essential requirement. To insure this intimate contact, the recording surface of the tape is very smooth; an asperity can lift the tape away from the gap of the head with attendant signal loss. This tape smoothness, however, may result in air entrapment between turns of the tape particularly during high speed rewind or fast forwarding operations.
  • "Tight winders" which are spring assemblies mounted in the cartridge, ride against the outermost surface of the tape pack and squeeze out any entrained air as the pack increases in radius.
  • the tight winders prevent any tendency of the outer layers of the tape pack to unravel when the cartridge is out of the recorder. Because the recording surface of the tape in the cartridge faces inward, contact between the recording surface and the heads must be accomplished by slipping the cartridge over the heads and guides as it is being lowered into position for mating with the recorder.
  • An aperture is provided in the cartridge bottom surface through which the heads and fixed tape guides located on the precision plate of the transport are inserted as the cartridge drops into position. No guides are located in the cartridge, the guides are exclusively mounted on the transport, simplifying cartridge construction as well as reducing cartridge cost.
  • the cross-section of the cartridge enclosure is hexagonal, readily identifying the front end of the cartridge for easy insertion into the recorder.
  • a pair of “tape lifters" in the cartridge accomplish this by engaging the tape and holding it clear of the heads and guides during insertion.
  • the tape lifters are retracted, and the tape wraps the heads and guides in preparation of operation.
  • the cartridge When the cartridge is out of the recorder, it is in a "parked" configuration where a spring loaded door covers the aperture in the cartridge bottom providing a totally enclosed environment for the tape.
  • the reel hubs are locked, and the tape lifters position the tape clear of the aperture.
  • the tape hub locks which consist of teeth on the same assembly as the tape lifters, engage rachet like teeth located on the hubs, securing the tape reels.
  • the cartridge As the cartridge is lowered into the transport, it is taken out of the parked configuration, and placed into the operated configuration.
  • the reeling system is energized, tensioning the tape as the tape wraps the heads and guides. With the cartridge in place, the system is ready for operation.
  • Fig. 1 is a perspective view showing the cartridge of the invention in the parked configuration
  • Fig. 2 is a perspective view showing the cartridge of the invention in the operate configuration
  • Fig. 3 is a plan view of the underside of the cartridge of the invention
  • Fig. 4 shows plan and elevation views of the hub of the cartridge of the invention.
  • a cartridge 10 is shown in its parked configuration.
  • the cartridge 10 is assembled from a lower section 12 and an upper section 14, both fabricated of plastic.
  • a magnetic tape 20, 0.25" wide, is wound on flangeless reel hubs 16, 18, and the path of the tape span 21 between the hubs 16,18 in the parked configuration is determined by the tape lifters 22, 24.
  • the tape lifters 22,24 are mounted on a plate 30 which is urged forward by a leaf spring 32. In the parked position, the spring 32 is extended, positioning the plate 30 towards the front of the cartridge, and the tape lifters 22,24 force the tape 20 forward in the cartridge.
  • the tape lifters 22,24 thereby position the span 21 of the tape 20 clear of an aperture 28 in the bottom of the shell 12.
  • the plate 30 also has teeth 36 which, in the parked configuration, engage rachet like teeth 38 of the hub 16.
  • the teeth 38 are sharply pointed to provide steep sloping sides to insure that the teeth 36 of the plate 30 drop into the depressions between the rachet like teeth 38 of the hub 16 when the parked configuration is initiated.
  • the locking of the hub 18 follows the identical process described above for the hub 16, except that the rachet like teeth of the hub 18 are the mirror images of the teeth on the hub 1_£ .
  • tight winders 40,42 which are leaf springs are fixed in the cartridge, and bear on the outermost layers of the tape packs of the hubs 16,18 at the points 44,46 where the tape 20 contacts the tape packs.
  • the pressure exerted by the tight winders 40,42 on the tape pack helps maintain the rigidity of the packs in the parked configuration and also keeps the outermost tape layers from any tendency to unravel.
  • the recording surface of the tape 20 faces inward, and, therefore, the tight winders 40,42 contact the base side of the tape 20 and not the recording surface side.
  • the tight winders 40,42 play a further role when the cartridge is in its operating position in the recorder, which is described below. Referring to Fig.
  • the cartridge 10 is shown in its operating configuration where the bar 30 has been retracted by means of an actuator in the recorder which engages a hole in a boss 48 (See Fig. 3) located on the bar 30.
  • the door 17, Fig.3, is tripped open.
  • the heads 50 and guides 52 project into the cartridge through the aperture 28 and are facing the tape span 21, which is still being held off by the tape lifters 22,24. With movement of the bar 30 the tape lifters 22,24 move rearward in the cartridge and the tape span 21 contacts the surface of the heads 50 and the guides 52 mounted on the recorder precision plate.
  • the teeth 36 on the bar 30 disengage the rachet teeth 38 on the hub 16 unlocking the hub, and the splines of the hub 16 engage the appropriate reeling motor turntable.
  • the hub 18 is unlocked and engages its reeling motor turntable. Excitation to the reeling motors then provides torque which tensions the tape, resulting in intimate contact between the heads and the guides and the tape.
  • the tight winders 40,42 squeegee the entrained air out from between turns of the tape 20 as it winds onto the hub acting as the take-up hub, ensuring a firm and rigid tape pack.
  • the bottom view of the cartridge 10 shows the underview of the hubs 16,18 which mate with the turntables mounted on the spindles of the reeling motors of the transport.
  • the hubs 16,18 are substantially hollow cylinders with splined interior surfaces consisting of lands 55 and grooves 54.
  • Fig.4 again considering the hub 16 as typical of both hubs 16,18, the teeth 38 which engage with the bar 30 for locking as previously described, are shown on the periphery of the lower rim 61 of the hub 16.
  • the lower portions of the lands 55 of the splined interior of the hub 16 are chamfered 56 to effect concentric mating of the hub 16 and the turntable of the transport.
  • An outer cylindrical surface 62 of the hub serves as the spool on which the tape is reeled.
  • a cap 58 which has no voids in its surface but which is corrugated to provide compliance in the axial direction, forms the top of the hub 16 and is provided with a wear button 60 which bears against the inner surface of the upper section 12 of the cartridge. It will be appreciated that the cap 58 provides a seal which, when the cartridge is in the parked configuration, keeps dust from entering the cartridge via the splined portion of the hub. Additionally, when the driving turntable is mated with the hub 16, the turntable pressing against the rim of the hub 16 forces the wear button 60 against the interior surface of the upper section 12 slightly compressing the compliant cap 58 to provide an axial reaction force that ensures firm mating between the hub 16 and the turntable.

Landscapes

  • Replacement Of Web Rolls (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)

Abstract

Une cartouche compacte (10) de stockage d'environ 720 pieds d'une bande magnétique (20) de 0,25'' d'épaisseur comprend une enceinte (12, 14) en plastique en deux sections qui contient deux bobines de bande et leurs moyeux (16, 18). La bande (20) est enroulée sur les bobines de la cartouche avec sa face d'enregistrement tournée vers l'intérieur de la cartouche (10). La cartouche (10) peut être axialement introduite dans un magnétophone. Une ouverture (28) au fond de la cartouche (10) permet aux têtes (50) et guides (52) du magnétophone de pénétrer dans la cartouche et d'entrer en contact avec la face d'enregistrement de la bande. Des enrouleurs (40, 42) de serrage à ressorts à lames expriment l'air entraîné entre les spires de la bande (20) à mesure que la bande (20) passe d'un moyeu (16, 18) à l'autre. Jusqu'à ce que la cartouche (10) soit en position dans le magnétophone, des cames (22, 24) maintiennent la bande (20) loin de l'ouverture (28), afin d'obtenir un positionnement aisé des têtes (50) de contact avec la bande (20) dans la cartouche (10). Une fois que la cartouche (10) est en position, les cames (22, 24) lâchent la bande (20), lui permettant d'entourer les têtes (50) et les guides (52) du magnétophone, libérant en même temps les verrous (36, 38) des moyeux (16, 18) de la cartouche.
EP19900908371 1989-05-16 1990-05-14 Cartouche compacte a haute capacite de memorisation pour magnetophones de precision Withdrawn EP0429589A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US35243189A 1989-05-16 1989-05-16
US352431 1999-07-13

Publications (1)

Publication Number Publication Date
EP0429589A1 true EP0429589A1 (fr) 1991-06-05

Family

ID=23385109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900908371 Withdrawn EP0429589A1 (fr) 1989-05-16 1990-05-14 Cartouche compacte a haute capacite de memorisation pour magnetophones de precision

Country Status (3)

Country Link
EP (1) EP0429589A1 (fr)
JP (1) JPH03506090A (fr)
WO (1) WO1990014667A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5297754A (en) * 1992-06-22 1994-03-29 International Business Machines Corporation Tape reel with brake and dust shield
US5316235A (en) * 1992-06-22 1994-05-31 International Business Machines Corporation Tape cartridge with mount plate
US5627818A (en) * 1992-10-13 1997-05-06 International Business Machines Corporation Optical disk with marks used for calibrating an optical detector to minimize noise from undesired perturbations in disk surfaces

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE948090C (de) * 1951-11-01 1956-08-30 Loewe Opta Ag Kassette fuer Magnetband- oder Drahtgeraete
DE1026094B (de) * 1956-07-19 1958-03-13 Loewe Opta Ag Tonaufzeichnungs- bzw. -wiedergabegeraet fuer wahlweise Verwendung zweier einzelner Tonbandspulen oder kassettierter Bandspulen
DE1188407B (de) * 1959-05-12 1965-03-04 Grundig Max Querverschiebliche Kupplung, insbesondere zum Antrieb der Spulenkoerper bei Tonbandgeraeten
DE1178226B (de) * 1962-07-20 1964-09-17 Laux Tonbildschau K G Umlegbare Tonbandkassette
US3497157A (en) * 1967-07-14 1970-02-24 Minnesota Mining & Mfg Two-reel cartridges having reflecting means
JPS519608B1 (fr) * 1970-08-25 1976-03-29
US3833185A (en) * 1973-07-23 1974-09-03 Eastman Kodak Co Magnetic tape cassette
DE8218184U1 (de) * 1982-06-25 1982-11-04 Basf Ag, 6700 Ludwigshafen Bandkassette und federelement dafuer
US4523727A (en) * 1984-06-29 1985-06-18 Minnesota Mining And Manufacturing Company Non-oscillating spool for belt driven cartridge
US4561610A (en) * 1984-07-26 1985-12-31 Megatape Corporation Tape cartridge loading apparatus
ES282232Y (es) * 1984-10-24 1986-12-16 Amper, S.A. Cartucho de cinta magnetica

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9014667A1 *

Also Published As

Publication number Publication date
JPH03506090A (ja) 1991-12-26
WO1990014667A1 (fr) 1990-11-29

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