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WO2003041079A1 - Porte a bossage amelioree de cartouche de bande - Google Patents

Porte a bossage amelioree de cartouche de bande Download PDF

Info

Publication number
WO2003041079A1
WO2003041079A1 PCT/US2001/042585 US0142585W WO03041079A1 WO 2003041079 A1 WO2003041079 A1 WO 2003041079A1 US 0142585 W US0142585 W US 0142585W WO 03041079 A1 WO03041079 A1 WO 03041079A1
Authority
WO
WIPO (PCT)
Prior art keywords
torsion spring
door
tape cartridge
improved
boss
Prior art date
Application number
PCT/US2001/042585
Other languages
English (en)
Inventor
William J. Vanderheyden
David Thomas Hoge
Original Assignee
Quantum Corporation
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 Quantum Corporation filed Critical Quantum Corporation
Priority to US10/491,396 priority Critical patent/US7016151B2/en
Priority to PCT/US2001/042585 priority patent/WO2003041079A1/fr
Publication of WO2003041079A1 publication Critical patent/WO2003041079A1/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
    • G11B23/041—Details
    • G11B23/045—Covers
    • 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 invention relates to digital tape cartridges, and in particular, to an improved boss door for a single reel tape cartridge.
  • Single reel tape cartridges have a pivoting door that pivots open when the tape cartridge is inserted into the tape drive to expose the enclosed magnetic tape media for operation.
  • the existing single reel tape cartridge boss door assembly is best described reading the following description in conjunction with the prior art illustrated in figures 1 and 2.
  • the prior art boss door 130 assembly utilizes a cylindrical post 110 integral to tape cartridge 100 and extending from cover 102 to base 104 of tape cartridge 100 and an upper boss 132 and a lower boss 134 integral to door 130.
  • the upper and lower bosses 132 and 134 include a cylindrical-shaped hole formed therein to fit over the cylindrical post.
  • upper and lower boss, 132 and 134 respectively, rotate on cylindrical post 110.
  • Lower boss 134 is positioned on door 130 to create an area between lower boss 134 and base 104 of tape cartridge housing 100 for torsion spring 120 to rotate around cylindrical post 110.
  • Torsion spring 120 has a straight top leg 122 and a straight bottom leg 124 that extend perpendicular a distance from torsion spring 120 coils. Top leg 122 is located adjacent to the base of lower boss 134 and bottom leg 124 is located at base 104 of tape cartridge 100 housing and is retained against tape cartridge 100 side wall 106.
  • a first problem with the prior art boss door 130 is that as the boss door 130 pivots, the diameter of the top coil of torsion spring 120 decreases causing the top coil to rub against cylindrical post 110. The rubbing creates a frictional drag that keeps the top coil of the torsion spring 120 from rotating freely around cylindrical post 110 which subsequently increases the stress applied to top leg 122 of torsion spring 120. This stress is compounded by the distance between torsion spring 120 and cylindrical post 110 which allows torsion spring 120 to shift closer to one side of cylindrical post 110 than the other side. The increased stress on top leg 122 of torsion spring 120 may result in tape cartridge failure due to premature failure of torsion spring 120.
  • boss door 130 also includes a rectangular catch 136 projecting from boss door 130 below the bottom boss.
  • Catch 136 is a rectangular projection having right angle corners.
  • the force applied by top leg 122 of torsion spring 120 to rectangular catch 136 holds door 130 closed.
  • rectangular catch 136 applies a force on top leg 122 pushing top leg 122 toward lower leg 124 until boss door 130 is fully open.
  • the force holding door 130 open is relieved and top leg 122 of torsion spring
  • a second problem with the prior art boss door occurs when rectangular catch 136 contacts with top leg 122 of torsion spring 120 at a point proximal to the coils.
  • the end of the rectangular catch 136 rotates in close proximity to torsion spring 120 coils and therefore interfaces with top leg 122 of torsion spring 120 proximate the coils.
  • Contact at this point on top leg 122 of torsion spring 120 generates additional tension on the top coil of torsion spring 120, thus increasing the frictional drag as torsion spring 120 rotates around cylindrical post 110.
  • Rectangular catch 136 has a sharp corner where rectangular catch 136 interfaces with top leg 122 of torsion spring 120.
  • top leg 122 of torsion spring 120 As boss door 130 pivots against top leg 122 of tension spring 120, only the sharp edge of rectangular catch 136 and a corresponding section of torsion spring 120 top leg 122 make contact.
  • Contacting top leg 122 or torsion spring 120 at only one point that is distal from the coils increases the force required to rotate the boss door 130 which places an increased stress on torsion spring 120.
  • the boss door just described exerts unnecessary stress on the torsion spring resulting in failure of the tape cartridge due to premature torsion spring failure. For these reasons, a need exists for an improved boss door that reduces the stress placed on the torsion spring to eliminate unnecessary tape cartridge failure. SOLUTION
  • the present tape cartridge improved boss door provides an improvement that reduces the stress exerted on the torsion spring, thus decreasing the frictional drag as the torsion spring rotates around the cylindrical post.
  • the improved boss door also reduces the force required to pivot the boss door open by relieving the tension on the torsion spring, thus reducing the failure rate of the tape cartridge due to premature failure of the torsion spring.
  • the improved boss door provides a sleeve extending from the lower boss to the base of the tape cartridge.
  • the outside diameter of the sleeve is slightly less than the inside diameter of the torsion spring and the torsion spring rotates around the sleeve.
  • the sleeve fills the gap between the cylindrical post and the torsion spring to prevent the torsion spring from shifting closer to one side of the post than the other side, thus decreasing the stress applied to the top coil of the torsion spring.
  • the improved boss door also replaces the rectangular catch with an improved catch that contacts a distal point on the torsion spring top leg.
  • the improved catch is a triangular member that protrudes from the boss door. The sides of the triangular member do not interface with the top leg of the torsion spring. Instead, only one corner of the triangular member comes into contact with the top leg of the torsion spring. The point of contact is a point on the top leg distal from the torsion spring top coil. Contact with the torsion spring top leg at a point distal from the coils relieves the tension on the top coil as the boss door pivots open, thus reducing the frictional drag as the torsion spring rotates around the sleeve.
  • a sleeve to fill the gap between the torsion spring and the cylindrical post provides an improved boss door that reduces the stress applied to the torsion spring, thus decreasing the failure rate of the tape cartridge due to premature failure of the torsion spring.
  • Providing an improved catch that contacts the torsion spring top leg at a point distal from the coils further reduces the stress applied to the torsion spring. Improving the mechanical characteristics to the door assembly without requiring improvements to the existing tape cartridge housing allows the improved boss door to be attached to existing tape cartridge housings, thus reducing the cost to manufacture tape cartridges with improved boss doors.
  • Figure 1 illustrates a perspective view of the prior art boss door
  • Figure 2 is a top view of the prior art boss door
  • Figure 3 illustrates a perspective view of the tape cartridge with a cross sectional view of the improved boss door
  • Figure 4 is a top view of the improved boss door.
  • the present tape cartridge improved boss door for single reel tape cartridges provides a sleeve attached to the lower boss that reduces the stress exerted on the torsion spring, thus decreasing the frictional drag as the torsion spring rotates around the sleeve.
  • the improved boss door also reduces the force required to pivot the boss door open by relieving the tension on the torsion spring created by the rectangular catch by replacing the rectangular catch with a triangular catch.
  • boss door 230 assembly utilizes a cylindrical post 210 integral to tape cartridge 100 and extending from cover 202 to base 204 of tape cartridge 200 and an upper boss 232 and a lower boss 234 integral to door 230.
  • the upper and lower bosses 232 and 234 include a cylindrical-shaped hole formed therein to fit over cylindrical post 210. When assembled, upper and lower boss, 132 and 134 respectively, rotate on cylindrical post 110. Upper boss 232 has not changed, however, lower boss 234 has been improved.
  • Lower Boss with Sleeve Figure 3: Referring to figure 3, lower boss 234 includes a sleeve 236 that projects perpendicularly downward from lower boss 234 approximately to base 204 of tape cartridge 200. The outside diameter of sleeve 236 is less than the inside diameter of torsion spring 220. When assembled, torsion spring 220 rotates around sleeve 236 as boss door 230 pivots.
  • Top leg 222 of torsion spring 220 extends outward from the top coil of torsion spring 220 adjacent lower boss 234.
  • Bottom leg 224 of torsion spring 220 extends outward from the bottom coil of torsion spring 220 along base 204 of tape cartridge 200 housing.
  • Sleeve 236 eliminates the gap between the cylindrical post 210 and torsion spring 220 as was found in the prior art tape cartridge boss door assemblies. Reducing the gap prevents torsion spring 220 from shifting to one side or the other of sleeve 236 as boss door 230 rotates around cylindrical post 210, thus reducing the tension placed on torsion spring 220 during operation.
  • improved boss door 230 provides a triangular catch 240 integrally formed to the back surface of improved boss door 230 directly below lower boss 234.
  • Triangular catch 240 projects from the back surface such that one corner of triangular catch 240 makes contact with top leg 222 of torsion spring 220.
  • the point of contact is a point on top leg 222 distal from the top coil of torsion spring 220.
  • the triangular catch 240 maintains the point of contact as boss door 230 pivots between and open and a closed position. Contacting top leg 222 of torsion spring 220 at a point distal from the top coil decreases the force required to pivot boss door 230 open.
  • torsion spring 220 rests against side wall 206 of tape cartridge 200 housing and top leg 222 of torsion spring 220 rests against the corner of triangular catch 240 to hold improved boss door 230 closed.
  • triangular catch 240 places a force on top leg 222 causing the coil of torsion spring 220 to begin to tighten against sleeve 236. Placing the force at a point on torsion spring 220 top leg 222 distal from torsion spring 220 top coil reduces the force required to pivot improved boss door 230, thus reducing the stress placed on torsion spring 220.
  • torsion spring 220 Providing sleeve 236 for torsion spring 220 to rotate around prevents torsion spring 220 from shifting to one side or the other, overcoming the problem of torsion spring 220 rubbing against cylindrical post 210. Preventing the rubbing reduces or eliminates the frictional drag that kept torsion spring 220 from rotating freely around the cylindrical post 210 in the prior art. Reducing or eliminating the frictional drag further decreases the force required to pivot boss door 230 open, thus further reducing the stress placed on torsion spring 220 top leg 222.
  • the improved boss door has been illustrated and described with improvements to the lower boss and the catch located on the back surface of the boss door. Improving the boss door while maintaining the existing characteristics of the tape cartridge housing provides an improved boss door that is compatible with existing tape cartridge housings. Eliminating the need to manufacture a new tape cartridge housing to utilize the improved boss door reduces the cost to manufacture a tape cartridge utilizing the improved boss door to reduce tape cartridge failure due to premature torsion spring failure.
  • a sleeve is integrally formed to the post and the torsion spring rotates around the sleeve.
  • the triangular catch integral to the improved boss door makes contact with the top leg of the torsion spring at a point distal from the tension spring coils.
  • an improved tape cartridge having a sleeve integrally formed to the tape cartridge reduces the stress applied to the torsion spring. Combining the improved tape cartridge housing with an improved boss door having the improved catch further reduces the tension applied to the torsion spring to prevent premature failure of the tape cartridge due to torsion spring failure.
  • the present tape cartridge improved boss door can be configured with improvements to the boss door and the tape cartridge housing. While the lower boss sleeve improvement can be incorporated by modifying the tape cartridge post, it would be necessary to manufacture a new tape cartridge housing as well as a boss door with the improved catch to reduce premature failure of the torsion spring. It is apparent that there has been described, a tape cartridge improved boss door that fully satisfies the objects, aims, and advantages set forth above. While the door assembly has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications, and/or variations can be devised by those skilled in the art in light of the foregoing description. Accordingly, this description is intended to embrace all such alternatives, modifications and variations as fall within the spirit and scope of the appended claims.

Landscapes

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

Abstract

L'invention concerne une porte à bossage améliorée de cartouche de bande qui fournit un manchon entre le bossage inférieur de façon que le ressort de torsion tourne autour pour réduire la contrainte appliquée sur la bobine supérieure dudit ressort. Un crampon amélioré se met en prise avec la tige supérieure du ressort de torsion à un point distant des bobines dudit ressort afin de réduire encore la force appliquée au ressort de torsion et la résistance due au frottement lorsque le ressort de torsion tourne autour du manchon, ce qui réduit le taux de défaillance de la cartouche de bande due à une défaillance prématurée du ressort de torsion.
PCT/US2001/042585 2001-10-09 2001-10-09 Porte a bossage amelioree de cartouche de bande WO2003041079A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/491,396 US7016151B2 (en) 2001-10-09 2001-10-09 Tape cartridge improved boss door
PCT/US2001/042585 WO2003041079A1 (fr) 2001-10-09 2001-10-09 Porte a bossage amelioree de cartouche de bande

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2001/042585 WO2003041079A1 (fr) 2001-10-09 2001-10-09 Porte a bossage amelioree de cartouche de bande

Publications (1)

Publication Number Publication Date
WO2003041079A1 true WO2003041079A1 (fr) 2003-05-15

Family

ID=21742968

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/042585 WO2003041079A1 (fr) 2001-10-09 2001-10-09 Porte a bossage amelioree de cartouche de bande

Country Status (1)

Country Link
WO (1) WO2003041079A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004037601A1 (de) * 2004-08-03 2006-02-23 Epcos Ag Elektrolytlösung für Doppelschichtkondensatoren und Doppelschichtkondensator mit der Elektrolytlösung
EP1699051A3 (fr) * 2005-03-03 2009-06-03 FUJIFILM Corporation Cassette pour une bande d'enregistrement

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0537714A2 (fr) * 1991-10-15 1993-04-21 Fuji Photo Film Co., Ltd. Cassette à bande magnétique
US5610789A (en) * 1995-05-09 1997-03-11 Eastman Kodak Company Tape cartridge with a gate member slidably mounted an access door
JPH09274787A (ja) * 1996-04-04 1997-10-21 Kao Corp テープカートリッジ
JPH09274785A (ja) * 1996-04-04 1997-10-21 Kao Corp テープカートリッジ
WO1999042999A1 (fr) * 1998-02-18 1999-08-26 Fuji Photo Film Co., Ltd. Cartouche de bande magnetique
US6175470B1 (en) * 1999-02-03 2001-01-16 Quantum Corp. Storage medium cartridge having an integral key
US6271991B1 (en) * 1999-06-11 2001-08-07 Quantum Corporation Tape cartridge

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0537714A2 (fr) * 1991-10-15 1993-04-21 Fuji Photo Film Co., Ltd. Cassette à bande magnétique
US5610789A (en) * 1995-05-09 1997-03-11 Eastman Kodak Company Tape cartridge with a gate member slidably mounted an access door
JPH09274787A (ja) * 1996-04-04 1997-10-21 Kao Corp テープカートリッジ
JPH09274785A (ja) * 1996-04-04 1997-10-21 Kao Corp テープカートリッジ
WO1999042999A1 (fr) * 1998-02-18 1999-08-26 Fuji Photo Film Co., Ltd. Cartouche de bande magnetique
US6175470B1 (en) * 1999-02-03 2001-01-16 Quantum Corp. Storage medium cartridge having an integral key
US6271991B1 (en) * 1999-06-11 2001-08-07 Quantum Corporation Tape cartridge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 02 30 January 1998 (1998-01-30) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004037601A1 (de) * 2004-08-03 2006-02-23 Epcos Ag Elektrolytlösung für Doppelschichtkondensatoren und Doppelschichtkondensator mit der Elektrolytlösung
DE102004037601B4 (de) * 2004-08-03 2007-07-12 Epcos Ag Elektrolytlösung für Doppelschichtkondensatoren und Doppelschichtkondensator mit der Elektrolytlösung
EP1699051A3 (fr) * 2005-03-03 2009-06-03 FUJIFILM Corporation Cassette pour une bande d'enregistrement

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