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WO1997015925A1 - Structure pour empecher le froissement des bords dans une cartouche a un enroulement a superposition imparfaite - Google Patents

Structure pour empecher le froissement des bords dans une cartouche a un enroulement a superposition imparfaite Download PDF

Info

Publication number
WO1997015925A1
WO1997015925A1 PCT/US1996/016434 US9616434W WO9715925A1 WO 1997015925 A1 WO1997015925 A1 WO 1997015925A1 US 9616434 W US9616434 W US 9616434W WO 9715925 A1 WO9715925 A1 WO 9715925A1
Authority
WO
WIPO (PCT)
Prior art keywords
flange
tape
spool
housing
cartridge
Prior art date
Application number
PCT/US1996/016434
Other languages
English (en)
Inventor
Robert C. Martin
Original Assignee
Imation 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 Imation Corp. filed Critical Imation Corp.
Priority to DE19681617T priority Critical patent/DE19681617T1/de
Publication of WO1997015925A1 publication Critical patent/WO1997015925A1/fr

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
    • G11B23/107—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends using one reel or core, one end of the record carrier coming out of the magazine or cassette

Definitions

  • the present invention relates to support mechanisms for tape in a tape cartridge, and in particular, to structures for supporting scatter-wound tape packs.
  • the tape in many types of tape cartridges winds into a tape pack about the tape spool such that some portions of the tape project above or below the main body of the tape pack.
  • This type of winding is called scatter-wound, as distinct from the smoother winding (with better alignment from one piece of tape to the next) found in some cartridges using belts or the like to assist in packing.
  • the tape spool in a 3 80-style tape cartridge such as that shown in European Published Patent Application 0588219 (Martin et al.) is free to float within the cavity created by the base and cover. The only restraint against such motion is the low restraining force of a spring biasing a brake into engagement with the spool.
  • the inertia of the tape pack can easily overcome the force of the brake spring, causing the tape spool to contact the inner walls of the cavity. This contact can force the spool flanges to deflect into the tape pack, thereby creasing the edges of any tape strand which protrudes from the pack. Creases in the tape can result in high error counts on the edge tracks of the tape and the like.
  • flange is a cantilever beam
  • a force applied only to the outer diameter deflects the flange much more than a force applied to the inner diameter or the entire flange. This deflection causes the flange to press against the tape pack, potentially creasing the edge of any tape strand(s) projecting above the main body of the tape pack.
  • the present invention significantly reduces creasing by modifying the tape spool or cover to limit contact between the flange and the cartridge cover.
  • a ring or ridge of material is added to the upper surface of the flange near its inner diameter. If the cartridge is bumped, causing the spool move toward the cover, this ring will define the primary line of contact of the spool with the inner surface of the cover.
  • the height of the ring is such that only the ring will contact the cover.
  • it is acceptable for the very outer diameter of the flange to also contact provided the geometry is such that the outer diameter is not significantly deflected by the contact. As a result, the inner surface of the flange will not be deflected into the tape pack.
  • the ring or ridge preferably is placed close to the inner diameter of the flange. This provides the maximum transfer of force directly to the spool hub, with the minimum deflection of the flange.
  • a ring or ridge of material can be added to the cover of the tape cartridge instead of or in addition to the ring on the flange.
  • the upper flange is made stiffer to resist deflection into the tape pack.
  • One method is to make the flange out of a material with a higher flexural modulus, such as glass reinforced material.
  • Another method is to provide the flange with radial ribs which resist deflection.
  • FIG. 1 is a partial cross-section of a cartridge according to a first embodiment of the invention.
  • Fig. 2 is a partial cross-section of a cartridge according to a second embodiment of the invention.
  • Fig. 3 is a partial cross-section of a cartridge according to a third embodiment of the invention.
  • Fig. 1 depicts a cartridge 10 with a cover 12 and a base 14 defining a cavity 15 therebetween in which a tape spool 16 is rotatably mounted.
  • a brake 18 also is positioned in the cavity 15 and is biased by a brake spring 20 toward the spool hub 21.
  • the drive When positioned in a drive, the drive would push the brake 18 away from the spool hub 21 (as shown in the drawing for clarity).
  • the brake spring 20 When not in a drive, the brake spring 20 would bias the brake teeth 22 into engagement with the spool teeth 24, thereby preventing rotation of the spool 16.
  • the spool 16 includes a lower flange 26 and an upper flange 28.
  • tape shown schematically at 29
  • the spool 16 may be formed as a single piece (as shown in Fig. 1), or, more conveniently, in multiple pieces, as shown, e.g., in European Published Patent Application 0588219 (Martin et al.).
  • a ring 30 is provided on the upper surface of the upper flange 28 near the center thereof. If the cartridge is dropped or otherwise impacted and the spool 16 is displaced toward the top cover 12, the ring 30 will engage the cover 12. Preferably, the height and radial position of the ring 30 are such that only the ring will contact the cover. However, it is acceptable for the very outer diameter of the upper flange 28 to also contact, provided the geometry is such that the upper flange 28 is not significantly deflected by the contact. The upper flange 28 therefore will not press against the tape pack 29.
  • a drop test can be useful in determining the appropriate height and radial position for the ring 30.
  • the height and radial position of the ring 30 should be such that the cartridge 10 can be dropped from a predetermined height, e.g., about 1.5 m, and still prevent the flange from deflecting into the tape pack with sufficient force to crease the edges of any exposed tape strands.
  • Fig. 2 depicts a cartridge which is substantially the same as that depicted in Fig. 1 and therefore will not be described in detail.
  • the difference between Fig. 1 and Fig. 2 is the location of the ring 30.
  • a ring 30' is positioned on the cover 12' above the central portion of the spool 16'. This ring 30' will interact with the upper portion of the spool 16' in much the same fashion as the ring 30 to prevent the flange 28' from pressing against the tape pack 29'.
  • Fig. 3 depicts a third embodiment according to the present invention. Again, most of the elements are substantially the same as those shown in Fig. 1 and will not be described in detail.
  • a radially extending rib 32 is provided on the upper flange 28". A plurality of these ribs 32 distributed around the spool 16" stiffen the upper flange 28". As a result, this added stiffness will prevent upper flange 28" from pressing against the tape pack 29".
  • the rib 32 is shown on the right side of the drawing and not on the left because the ribs 32 may not necessarily be along the same diameter across the spool 16".
  • the upper flange 28 may be formed of a material having a higher flexural modulus.
  • the material could be a glass reinforced material.
  • Such a material currently is used with some regularity in forming the lower flange 26, e.g., as taught in European Published Patent Application 0588219 (Martin et al.), so one skilled in the art will be familiar with how to form a flange of such material.
  • any or all of the various embodiments described above could be combined.
  • the rings 30, 30' and rib 32 also can be molded as part of the upper flange 28, 28', 28", or can be added thereto, as convenient for manufacturing.
  • any of these could be combined with a stiffer modulus material.

Landscapes

  • Storage Of Web-Like Or Filamentary Materials (AREA)

Abstract

L'invention concerne différentes structures destinées à minimiser le froissement des bords d'un ruban dans une cartouche à ruban. Plusieurs structures empêchent que la flasque ne soit pressée par le logement de la cartouche à ruban sur le ruban embobiné avec une force suffisante pour froisser les bords de certaines spires exposée de la bande. L'utilisation de différentes structures ou de matériaux spéciaux permet également de rendre la flasque plus rigide, et de diminuer encore la probabilité que la flasque ne se plie vers le ruban embobiné.
PCT/US1996/016434 1995-10-26 1996-10-16 Structure pour empecher le froissement des bords dans une cartouche a un enroulement a superposition imparfaite WO1997015925A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19681617T DE19681617T1 (de) 1995-10-26 1996-10-16 Struktur zum Beschränken des Randeinknickens bei einer unregelmäßig gewickelten Kassette

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54870695A 1995-10-26 1995-10-26
US08/548,706 1995-10-26

Publications (1)

Publication Number Publication Date
WO1997015925A1 true WO1997015925A1 (fr) 1997-05-01

Family

ID=24190055

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/016434 WO1997015925A1 (fr) 1995-10-26 1996-10-16 Structure pour empecher le froissement des bords dans une cartouche a un enroulement a superposition imparfaite

Country Status (2)

Country Link
DE (1) DE19681617T1 (fr)
WO (1) WO1997015925A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998007157A1 (fr) * 1996-08-14 1998-02-19 Storage Technology Corporation Bobine et cartouche de bande magnetique munies de flasques de protection
EP1098320A3 (fr) * 1999-11-08 2001-09-12 Fuji Photo Film Co., Ltd. Cassette à bande magnétique
WO2003015097A1 (fr) * 2001-06-20 2003-02-20 Quantum Corporation Bobine autocentreuse pour cartouches monobobines
US6650504B2 (en) 2001-05-09 2003-11-18 Imation Corp. Data storage tape cartridge with tape reel centering brake assembly
EP1098321A4 (fr) * 1998-06-08 2004-03-24 Fuji Photo Film Co Ltd Cartouche de bande magnetique
US7100858B2 (en) 2001-10-15 2006-09-05 Quantum Corporation Self-centering tape reel for single reel tape cartridges

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3836096A (en) * 1971-12-01 1974-09-17 Matsushita Electric Ind Co Ltd Tape reel and tape reel storing magazine
US3857531A (en) * 1972-10-26 1974-12-31 Int Video Corp Tape reel cartridge
US3987489A (en) * 1974-12-16 1976-10-19 Basf Aktiengesellschaft Tape cartridge which is normally closed but is pivoted to open position when taken into use, and transport apparatus for such a cartridge
EP0588219A2 (fr) * 1992-09-14 1994-03-23 Minnesota Mining And Manufacturing Company Cassette à bobine comportant des flasques minces à ouvertures

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3836096A (en) * 1971-12-01 1974-09-17 Matsushita Electric Ind Co Ltd Tape reel and tape reel storing magazine
US3857531A (en) * 1972-10-26 1974-12-31 Int Video Corp Tape reel cartridge
US3987489A (en) * 1974-12-16 1976-10-19 Basf Aktiengesellschaft Tape cartridge which is normally closed but is pivoted to open position when taken into use, and transport apparatus for such a cartridge
EP0588219A2 (fr) * 1992-09-14 1994-03-23 Minnesota Mining And Manufacturing Company Cassette à bobine comportant des flasques minces à ouvertures

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998007157A1 (fr) * 1996-08-14 1998-02-19 Storage Technology Corporation Bobine et cartouche de bande magnetique munies de flasques de protection
EP1098321A4 (fr) * 1998-06-08 2004-03-24 Fuji Photo Film Co Ltd Cartouche de bande magnetique
US6760192B2 (en) 1998-06-08 2004-07-06 Fuji Photo Film Co., Ltd. Magnetic tape cartridge for housing a reel
US7097126B2 (en) 1998-06-08 2006-08-29 Fuji Photo Film Co., Ltd. Magnetic tape cartridge
EP1903571A1 (fr) * 1998-06-08 2008-03-26 FUJIFILM Corporation Cassette à bande magnétique
EP1098320A3 (fr) * 1999-11-08 2001-09-12 Fuji Photo Film Co., Ltd. Cassette à bande magnétique
US6462905B1 (en) 1999-11-08 2002-10-08 Fuji Photo Film Co., Ltd. Magnetic tape cartridge
EP1492112A3 (fr) * 1999-11-08 2006-02-08 Fuji Photo Film Co., Ltd. Cassette à bande magnétique
US6650504B2 (en) 2001-05-09 2003-11-18 Imation Corp. Data storage tape cartridge with tape reel centering brake assembly
WO2003015097A1 (fr) * 2001-06-20 2003-02-20 Quantum Corporation Bobine autocentreuse pour cartouches monobobines
US7100858B2 (en) 2001-10-15 2006-09-05 Quantum Corporation Self-centering tape reel for single reel tape cartridges

Also Published As

Publication number Publication date
DE19681617T1 (de) 1998-10-08

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