`
`PCT
`
`International Bureau
`WORLD INTELLECTUAL PROPERTY ORGANIZATION
`
`
`
`INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT)
`
`(51) International Patent Classification 5 :
`GllB 23/107
`
`1 May 1997 (01.05.97)
`WO 97115925 (43) International Publication Date:
`
`(11) International publication Number:
`
`(21) International Application Number:
`
`PCI‘/US96/ 16434
`
`(81) Designated States: CN, DE, JP.
`
`(22) International Filing Date:
`
`16 October 1996 (16.10.96) Published
`With international search report.
`
`(30) Priority Data:
`08/548,706
`
`26 October 1995 (26.10.95)
`
`US
`
`(71) Applicant: IMATION CORP. [US/US]; 1 Imation Place, PO.
`Box 64898, Saint Paul, MN 55164-0898 (US).
`
`(72) Inventor: MARTIN, Robert, C.; PO. Box 64898, Saint Paul,
`MN 55164-0898 (US).
`
`(74) Agent: DENNIS, Charles. I... ll; Imation Legal Affairs, PO.
`Box 64898, Saint Paul, MN 55164-0898 (US).
`
`
`
`(54) Title: STRUCTURE TO LIMIT EDGE CREASING IN A SCATTER-WOUND CARTRIDGE
`
`1O
`
`(57) Abstract
`
`Various structures are described to minimize tape edge creasing in a tape cartridge. Several structures prevent the flange from being
`pressed by the housing of the tape cartridge into the tape pack with sufficient force to crease the edges of any exposed tape strands. Use
`of various structures or alternative materials also can stiffen the flange, again reducing the likelihood of the flange deflecting into the tape
`pack.
`
`
`
`FUJIFILM, Exh. 2017, p. 1
`
`FUJIFILM V. Sony, 2018-00876
`
`FUJIFILM, Exh. 2017, p. 1
`FUJIFILM v. Sony, 2018-00876
`
`

`

`Viel Nam
`
`AM
`AT
`AU
`BB
`BE
`BF
`36
`3]
`BR
`BY
`CA
`CF
`CG
`CH
`Cl
`CM
`CN
`CS
`CZ
`DE
`DK
`EE
`ES
`Fl
`FR
`GA
`
`Armenia
`Austria
`Australia
`Barbados
`Belgium
`Burkina Faso
`Bulgaria
`Benin
`Brazil
`Belams
`Canada
`Central African Republic
`Congo
`Switzerland
`Cate d'lvoire
`Cameroon
`China
`Czechoslovakia
`Czech Republic
`Germany
`Denmark
`Estonia
`Spain
`Finland
`France
`Gabon
`
`»
`
`United Kingdom
`Georgia
`Guinea.
`Greece
`Hungary
`Ireland
`Italy
`Japan
`Kenya
`Kyrgystan
`Democratic People's Republic
`of Korea
`Republic of Korea
`Kazakhstan
`Liechtenstein
`Sri Lanka
`Liberia
`Lithuania
`Luxembourg
`Latvia
`Monaco
`Republic of Moldova
`
`'
`
`'
`
`‘
`
`'
`
`FOR THE PURPOSES OF INFORMATION ONLY
`
`Codes used to identify States party to the PCT on the front pages of pamphlets publishing international
`applications under the PCT.
`
`Malawi
`Mexico
`Niger
`Netherlands
`Norway
`New Zealand
`Poland
`Portugal
`Romania
`Russian Federation
`Sudan
`Sweden
`Singapore
`Slovenia
`Slovakia
`Senegal
`Swaziland
`Chad
`Togo
`Tajikistan
`Trinidad and Tobago
`um
`Uganda
`United States of America
`Uzbekistan
`
`FUJIFILM, Exh. 2017, p. 2
`
`FUJIFILM V. Sony, 2018-00876
`
`FUJIFILM, Exh. 2017, p. 2
`FUJIFILM v. Sony, 2018-00876
`
`

`

`W0 97/15925
`
`PCTIUS96/l 6434
`
`STRUCTURE TO LI>MIT EDGE CREASING
`IN A SCATTER-WOUND CARTRIDGE
`
`Background of the Invention
`
`Field of the Invention
`
`The present invention relates to support mechanisms for tape in a
`
`tape cartridge, and in particular, to structures for supporting scatter-wound
`
`tape packs.
`
`Description 9f the Related Art
`
`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 3480-style tape cartridge such as that shown in
`
`European Published Patent Application 0 588 219 (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. However, during shipping and handling
`
`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. Even fairly routine shipping and handling of the
`
`cartridge can develop this problem.
`
`This problem is usually most significant for the upper flange
`
`because the spool normally is biased toward the bottom of the cartridge
`
`10
`
`15
`
`20
`
`25
`
`30
`
`FUJIFILM, Exh. 2017, p. 3
`
`FUJIFILM V. Sony, 2018-00876
`
`FUJIFILM, Exh. 2017, p. 3
`FUJIFILM v. Sony, 2018-00876
`
`

`

`W0 97/l 5925
`
`PCT/US96/16434
`
`housing. This means that it already is resting flat against the bottom, so
`
`any forces tend to be evenly distributed over the entire lower flange. Thus,
`
`the lower flange is not likely to be significantly bent or distorted if the
`
`cartridge is struck on the bottom.
`
`In contrast, the gap between the top of
`
`the spool and the cover allows the spool to be thrown against the cover,
`
`and, in particular, to be thrown against the cover at varying angles. This
`
`means that the outer diameter of the flange may be the only part of the
`
`spool contacting the cover. Since the 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.
`
`Efforts have been made to limit the amount of tape which can
`
`protrude from the tape pack by tightly controlling the spacing and taper of
`
`the spool flanges. The effectiveness of this approach has been limited by
`
`the molding and assembly tolerances encountered during manufacture of
`
`the spool and assembly of the drive. As a consequence of this, some past
`
`spool designs allow tapes to become creased within the recording part of
`
`1O
`
`15
`
`20
`
`the tape, thus resulting in high error counts.
`
`Summam of the Invention
`
`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. Preferably, the
`
`height of the ring is such that only the ring will contact the cover. However,
`
`it is acceptable for the very outer diameter of the flange to also contact,
`
`25
`
`30
`
`FUJIFILM, Exh. 2017, p. 4
`
`FUJIFILM V. Sony, 2018-00876
`
`FUJIFILM, Exh. 2017, p. 4
`FUJIFILM v. Sony, 2018-00876
`
`

`

`
`
`W0 97/] 5925
`
`PCT/US96/16434
`
`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.
`
`Alternatively, 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.
`
`According to another embodiment of the invention, the upper flange
`
`1O
`
`is made stiffer to resist deflection into the tape pack. One method is to
`
`15
`
`20
`
`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.
`
`As will be apparent, these various embodiments are not mutually
`
`exclusive, and can be combined as desired to achieve the desired effect,
`
`which is preventing the flange from creasing the tape edges projecting
`
`from the main body of the tape pack.
`
`Brief Description of the Drawings
`
`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
`
`25
`
`embodiment of the invention.
`
`Detailed Descrigtion of the Preferred Embodiments
`
`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
`
`30
`
`brake 18 also is positioned in the cavity 15 and is biased by a brake spring
`
`FUJIFILM, Exh. 2017, p. 5
`
`FUJIFILM V. Sony, 2018-00876
`
`FUJIFILM, Exh. 2017, p. 5
`FUJIFILM v. Sony, 2018-00876
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`

`

`W0 97/l 5925
`
`PCT/U896“ 6434
`
`20 toward the spool hub 21. 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). 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.
`use, tape (shown schematically at 29) would be wound around the spool
`16 between the lower and upper flanges 26, 28. The spool 16 may be
`formed as a single piece (as shown in Fig. 1), or, more conveniently, in
`multiple pieces, as shown, 9.9., in European Published Patent Application
`0 588 219 (Martin et al.).
`
`In
`
`According to the current invention, 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
`
`1D
`
`15
`
`20
`
`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. To use this test, 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.
`
`25
`
`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
`
`In Fig.
`difference between Fig. 1 and Fig. 2 is the location of the ring 30.
`2, a ring 30' is positioned on the cover 12' above the central portion of the
`
`FUJIFILM, Exh. 2017, p. 6
`
`FUJIFILM V. Sony, 2018-00876
`
`FUJIFILM, Exh. 2017, p. 6
`FUJIFILM v. Sony, 2018-00876
`
`

`

`WO 97/15925
`
`PCT/US96/l 6434
`
`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.
`
`In the embodiment of
`
`Fig. 3, however. instead of a ring 30, 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". Note
`
`that 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".
`
`In addition to or instead of using a ring 30, 30' or ribs 32, the upper
`
`flange 28 may be formed of a material having a higher flexural modulus.
`
`For example, the material could be a glass reinforced material. Such a
`
`material currently is used with some regularity in forming the lower flange
`
`26. 9.9., as taught in European Published Patent Application 0 588 219
`
`(Martin et al.), so one skilled in the art will be familiar with how to form a
`
`1O
`
`15
`
`20
`
`flange of such material.
`
`It will be understood by one skilled in the art that any or all of the
`
`various embodiments described above could be combined. For example, it
`
`would be perfectly possible to have a ring on both the upper cover and the
`
`top of the flange, as well as to have both a ring and ribs. 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. Finally, any of
`
`these could be combined with a stiffer modulus material.
`
`With all of these alternative embodiments and materials, the drop
`
`test described in connection with the first embodiment can be used to set a
`
`useful guide for the necessary height, position and/or stiffness.
`
`25
`
`30
`
`FUJIFILM, Exh. 2017, p. 7
`
`FUJIFILM V. Sony, 2018-00876
`
`FUJIFILM, Exh. 2017, p. 7
`FUJIFILM v. Sony, 2018-00876
`
`

`

`W0 97/15925
`
`PCT/U596]16434
`
`It will be understood that these exemplary embodiments in no way
`limit the scope of the invention. Other modifications of the invention will be
`
`apparent to those skilled in the art in view of the foregoing description.
`
`These descriptions are intended to provide specific examples of
`
`embodiments which clearly disclose the present invention. Accordingly,
`
`the invention is not limited to the described embodiments or to the use of
`
`specific elements, dimensions, materials or configurations contained
`
`therein. All alternative modifications and variations of the present
`
`invention which fall within the spirit and scope of the appended claims are
`covered.
`
`10
`
`FUJIFILM, Exh. 2017, p. 8
`
`FUJIFILM V. Sony, 2018-00876
`
`FUJIFILM, Exh. 2017, p. 8
`FUJIFILM v. Sony, 2018-00876
`
`

`

`W0 97/l 5925
`
`l Claim:
`
`PCT/U896" 6434
`
`1.
`
`A tape cartridge having:
`
`a)
`
`b)
`
`c)
`
`5
`
`a housing defining a cavity therein;
`
`a spool having a central hub, and two flanges; and
`
`tape wound on the spool between the flanges to form a tape
`
`Pack;
`
`characterized in that an abutment structure is formed on at least the
`
`housing or one flange, the abutment structure being of a height and
`
`radial position such that it does not interfere with operation of the
`
`10
`
`spool in normal use, but if the cartridge is dropped from a
`
`predetermined height, the abutment structure will contact the
`
`opposing flange or housing to substantially prevent the flange from
`
`being deflected by the housing into the tape pack with sufficient
`
`force to crease the edge of any tape strands projecting beyond the
`
`15
`
`main body of the tape pack.
`
`2.
`
`The tape cartridge of claim 1, further characterized in that the
`
`abutment structure comprises a ring.
`
`3.
`
`The tape cartridge of claim 2, further characterized in that the ring is
`
`formed on a surface of the spool near the center of the flange.
`
`20
`
`4.
`
`The tape cartridge of claims 2 or 3, further characterized in that the
`
`ring is formed on an inner surface of the housing adjacent to the
`
`central portion of the flange.
`
`5.
`
`The tape cartridge of any of claims 1-4, further characterized in that
`
`the abutment structure is formed on both the housing and one
`
`25
`
`flange.
`
`6.
`
`The tape cartridge of claim 5, further characterized in that the
`
`abutment structure on the housing aligns with the abutment
`
`structure on the flange.
`
`FUJIFILM, Exh. 2017, p. 9
`
`FUJIFILM V. Sony, 2018-00876
`
`FUJIFILM, Exh. 2017, p. 9
`FUJIFILM v. Sony, 2018-00876
`
`

`

`WO 97/15925
`
`PCT/US96/16434
`
`7.
`
`A tape cartridge having:
`
`a)
`
`b)
`
`a housing defining a cavity therein;
`
`a spool having a central hub and an upper and a lower
`
`flange;and
`
`5
`
`c)
`
`tape wound on the spool between the flanges;
`
`characterized in that the upper flange is stiffened by stiffening
`
`means enough that if the cartridge is dropped from a predetermined
`
`height and the flange contacts the housing, the housing will not
`
`deflect the flange into the tape pack with sufficient force to crease
`
`10
`
`the edge of any tape strands projecting beyond the main body of the
`
`tape pack.
`
`a.
`
`The tape cartridge of any of claims 1-7, further characterized in that
`
`the upper flange is stiffened by being formed of materials having a
`
`sufficiently high flexural modulus to make the flange sufficiently stiff
`
`15
`
`to prevent the deflection.
`
`9.
`
`The tapecartridge of any of claims 1-8, further characterized in that
`
`the upper flange is stiffened by forming a plurality of radially
`
`extending ribs on an upper surface of the upper flange, the ribs
`
`being of a sufficient thickness to stiffen the upper flange sufficiently
`
`20
`
`to prevent the deflection.
`
`10.
`
`The tape cartridge of any of claims 1-9. further characterized in that
`
`the upper flange is formed of a glass reinforced material.
`
`FUJIFILM, Exh. 2017, p. 10
`
`FUJIFILM V. Sony, 2018-00876
`
`FUJIFILM, Exh. 2017, p. 10
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`
`

`

`W0 97/1 5925
`
`PCT/US96/l 6434
`
`1/1
`
`
`
`FUJIFILM, Exh. 2017, p. 11
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`FUJIFILM V. Sony, 2018-00876
`
`FUJIFILM, Exh. 2017, p. 11
`FUJIFILM v. Sony, 2018-00876
`
`

`

`
`
`
`INTERNATIONAL SEARCH REPORT
`
` Inter
`nal Application No
`
`UBJECI‘ MATTER
`A. CLASSIFICATION O
`IPC 6
`611323 107
`
`PCT/US 96/16434
`
`According to International Patent Clam'fication (IPC) or to both national clamfication and [PC
`B. FIELDS SEARCHED
`Minimum documentation seardied (clamficauon system followed by damfication symbols)
`IPC 6
`6118
`
`Documentation searched other than minimum documentation to the extent that such documents are included in me field: searched
`
`Electronic data base consulted during the international search (name of data base and. where practical. search terms used)
`
`C. DOCUMENTS CONSIDERED TO BE RELEVANT
`
`Citation of document. With indication. where appmpnate. of the relevant pmges
`
`Relevant in claim No.
`
`EP,A,O 588 219 (MINNESOTA MINING & MFG
`;STORAGE TECHNOLOGY CORP (US)) 23 March
`1994
`
`cited in the application
`see column 5,
`line 12 - column 6.
`
`line 34
`
`US,A,3 987 489 (SCHOETTLE KLAUS ET AL) 19
`October 1976
`
`see colum 4,
`
`line 47 —
`
`line 64
`
`1,7
`
`US,A,3 836 096 (FUKUSHIMA J ET AL) 17
`September 1974
`see column 5,
`
`line 29 -
`
`line 64
`
`
`
`US,A,3 857 531 (JANTZEN J) 31 December
`1974
`see column 3,
`
`line 11 -
`
`line 17
`
`D Further documents are lined in the continuation of box C.
`' Special categories of Cited documents :
`
`'A' document defining the general state of the art which is not
`consdered to be of particular relevance
`'E' earlier document but published on or alter the international
`filing date
`'L‘ document which may throw doubts on priority claim“) or
`which is Cited to establish the puflicauon date of mother
`Citation or other special reason (as specified)
`‘0' document referring to an oral disclosure. use. exhibition or
`other means
`'P' document published prior to the international filing date but
`later than the priority date claimed
`Date of the actual completion of the international search
`
`17 January 1997
`Name and mailing addrss of the [SA
`European Patent Office, P.B. 5818 Patentlaan 2
`NL - 2230 HV Rijswnk
`Tel. (+3140) 340-2040. TX. 3! 651 epo nl,
`Fax: (+ 31‘70) 340-3016
`
`Form PCT/lSA/Zlo (”and sheet) (July I99!)
`
`Patent family members are listed in annex.
`
`"I" later document published after the international filing date
`or priority date and not in conflict with the application but
`gated to understand the principle or theory underlying the
`invention
`'X' document of particular relevance; the claimed invention
`cannot be considered novel or cannot be considered to
`uivolve an inventive step when the document is taken alone
`'Y' document of particular relevance; the claimed invention
`cannot be consdered to involve an inventive step when the
`document is combined With one or more other such docu-
`ments, such combination being obVious to a person skilled
`in the art.
`'ilt' document member of the same patent family
`Date of mailing of the international search report
`
`28.01.97
`
`Authorized officer
`
`Ressenaar, J-P
`
`FUJIFILM, Exh. 2017, p. 12
`
`FUJIFILM V. Sony, 2018-00876
`
`FUJIFILM, Exh. 2017, p. 12
`FUJIFILM v. Sony, 2018-00876
`
`

`

`Patent document
`cited in search report
`
`Publilution
`due
`
`EP-A-0588219
`
`23-03-94
`
`17-09-74
`
`
`
`
`
`
`
`
`
` US-A-3836096
`
`
`
`
`
`
`
`
`
`
`INTERNATIONAL SEARCH REPORT
`‘nl'ornunon on patent family mambzrs
`
`
`
`Inter
`
`nal Applicauon No
`
`
`
`PCT/US 96/16434
`
`member(s)
`
`CA-A-
`JP-A-
`
`2105116
`6282960
`
`CA-A-
`DE-A-
`DE-A-
`GB-A-
`GB-A-
`NL-A,B
`AU-B-
`
`980317
`2264553
`2264555
`1416744
`1416743
`7216248
`453571
`4948372
`
`date
`
`15-03-94
`07-10-94
`
`23-12-75
`18-04-74
`02-05-74
`03-12-75
`03-12-75
`05-06-73
`03-10-74
`
`
`
`Form PCT/ISAsz (pawn runny Innu) (July 1992)
`
`
`
`FUJIFILM, Exh. 2017, p. 13
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`FUJIFILM V. Sony, 2018-00876
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`FUJIFILM, Exh. 2017, p. 13
`FUJIFILM v. Sony, 2018-00876
`
`