US20050161544A1 - Single-reel type tape cartridge - Google Patents

Single-reel type tape cartridge Download PDF

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Publication number
US20050161544A1
US20050161544A1 US10/984,899 US98489904A US2005161544A1 US 20050161544 A1 US20050161544 A1 US 20050161544A1 US 98489904 A US98489904 A US 98489904A US 2005161544 A1 US2005161544 A1 US 2005161544A1
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US
United States
Prior art keywords
turnover
leader
anvil
tape
welded area
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.)
Abandoned
Application number
US10/984,899
Inventor
Yasuo Inugai
Takuya Katayama
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.)
Maxell Ltd
Original Assignee
Hitachi Maxell Ltd
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 Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Assigned to HITACHI MAXELL, LTD. reassignment HITACHI MAXELL, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KATAYAMA, TAKUYA, INUGAI, YASUO
Publication of US20050161544A1 publication Critical patent/US20050161544A1/en
Priority to US12/613,230 priority Critical patent/US7967931B2/en
Assigned to HORIZON TECHNOLOGY FINANCE CORPORATION reassignment HORIZON TECHNOLOGY FINANCE CORPORATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: COGNOA, INC.
Abandoned legal-status Critical Current

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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
    • G11B23/20—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 with provision for splicing to provide permanent or temporary connections
    • G11B23/26—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 with provision for splicing to provide permanent or temporary connections of leaders for loading or threading, e.g. to form a temporary connection
    • 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
    • G11B15/60—Guiding record carrier
    • G11B15/66—Threading; Loading; Automatic self-loading
    • G11B15/67—Threading; Loading; Automatic self-loading by extracting end of record carrier from container or spool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/40—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of definite length, i.e. discrete articles
    • B29C53/42—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of definite length, i.e. discrete articles using internal forming surfaces, e.g. mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/346—Making joints having variable thicknesses in the joint area, e.g. by using jaws having an adapted configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/008—Tapes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Definitions

  • the present invention relates to a single-reel type tape cartridge in which a leader member is coupled with a leading edge of a tape.
  • the leader member is provided for drawing out the tape to a tape drive mechanism and is coupled with a leader tape joined to a leading edge of a magnetic tape.
  • a cutout is formed at a widthwise central location of a coupling portion of the leader tape so as to define a pair of winding pieces at opposite sides of the cutout in the coupling portion and the winding pieces are wound around a pin of the leader member and turned over to the leader tape so as to be attached to the leader tape by ultrasonic welding.
  • each winding piece adjacent to its distal edge and the other lateral edge of each winding piece adjacent to the pin of the leader member are subjected to welding to a more scatterable degree than other weld zones so as to prevent concentration of loads on the welded lateral edges of each winding piece such that the leader tape is prevented from being fractured at the welded lateral edges of each winding piece.
  • fused resin may ooze out of peripheral edges of the welded winding pieces so as to be solidified.
  • an external shape of a welded portion is made slightly smaller than a shape of the peripheral edge of each winding piece so as to form an unwelded portion along the peripheral edge of each winding piece.
  • a width of the unwelded portion is set at not less than 0.1 mm.
  • an essential object of the present invention is to provide a single-reel type tape cartridge in which since a winding piece of a leader tape is wound around a pin of a leader member so as to be welded to the leader tape securely at a high welding strength by positively preventing ooze of fused resin out of a peripheral edge of the welded winding piece, reliability of a coupling section between the leader tape and the leader member can be upgraded.
  • Another important object of the present invention is to provide a single-reel type tape cartridge in which by restraining deterioration of material of opposite side edges of the winding piece and the leader tape attached to each other upon thermal welding of the winding piece, fracture of the leader tape from a welded edge of the winding piece can be prevented positively.
  • a single-reel type tape cartridge includes a leader tape having a coupling portion disposed at its leading edge, a leader member having a pin and an anvil for supporting the coupling portion of the leader tape.
  • the coupling portion is wound around the pin and turned over to the leader tape so as to be attached to the leader tape by ultrasonic welding and includes a pair of winding pieces spaced away from each other by an elongated cutout formed at a central portion of an end of the leader tape.
  • Each of the winding pieces includes a base portion disposed at its base end portion and a turnover portion wound around the pin and turned over to the base portion so as to be attached to the base portion by ultrasonic welding.
  • the anvil has a pair of anvil faces each having a width smaller than that of the turnover portion and ultrasonic welding of the turnover portion to the base portion is performed by supporting the coupling portion on the anvil faces.
  • a completely welded area having a width substantially equal to that of each of the anvil faces is formed from a center to a vicinity of opposite side edges of the turnover portion and an incompletely welded area is formed between each of opposite side edges of the completely welded area and each of the opposite side edges of the turnover portion.
  • FIG. 1 is a top plan view showing a configuration in which a coupling portion of a leader tape is welded to the leader tape via a pin of a leader member in a single-reel type tape cartridge according to a first embodiment of the present invention
  • FIG. 2 is an enlarged view of a portion P 1 in FIG. 1 ;
  • FIG. 3 is a top plan view showing an internal structure of the single-reel type tape cartridge of FIG. 1 ;
  • FIG. 4 is a front elevational view showing an operational state of the single-reel type tape cartridge of FIG. 1 , in which the leader member is drawn out of a cartridge casing;
  • FIG. 5 is a vertically sectional side elevational view showing a welding state of the coupling portion of the leader-tape of FIG. 1 ;
  • FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5 ;
  • FIG. 7 is an enlarged view of a portion P 2 in FIG. 6 ;
  • FIG. 8 is a front elevational view showing a developed state of the coupling portion of FIG. 1 ;
  • FIG. 9 is a top plan view showing an anvil employed in a single-reel type tape cartridge according to a second embodiment of the present invention.
  • FIG. 10 is an enlarged view of a portion P 3 in FIG. 9 .
  • FIGS. 1 to 8 show a single-reel type tape cartridge according to a first embodiment of the present invention.
  • the single-reel type tape cartridge includes a rectangular boxlike casing 1 formed by upper and lower casings 1 a and 1 b which confront each other so as to be bonded to each other.
  • a tape 3 for recording magnetic signals thereon is wound into a single reel 2 disposed inside the cartridge casing 1 .
  • a tape window 4 opens on a front wall of the cartridge casing 1 and is selectively opened and closed by a pivotally movable door 5 .
  • the door 5 is normally urged towards a closed position of the tape window 4 by a spring and is locked at the closed position by a locking mechanism (not shown).
  • Reel locking pawls 6 and 7 are, respectively, provided at two opposed inner corners of the cartridge casing 1 and are brought into engagement with gear teeth formed on an outer circumference of the reel 2 so as to hold the reel 2 immovably.
  • a switching piece 8 for preventing erroneous erasure is provided on an inner face of a rear wall of the cartridge casing 1 .
  • a leader tape 10 is attached to a leading edge of the tape 3 and a leader member 11 is coupled with an end portion of the leader tape 10 .
  • the leader member 11 is formed into a substantially U-shaped frame including a pin 12 made of stainless steel and a pair of engagement arms 13 provided at opposite ends of the pin 12 , respectively.
  • the pin 12 is formed by a thin round rod and has a locking rod 12 a disposed at its central portion and a pair of winding rods 12 b disposed at opposite sides of the locking rod 12 a , respectively.
  • Each of the winding rods 12 b is slightly smaller in diameter than the locking rod 12 a and an anchor portion 12 c is formed at a distal end of each of the winding rods 12 b .
  • a pair of step portions 14 for positioning the leader tape 10 are, respectively, formed at opposite ends of the locking rod 12 a due to a difference in diameter between the locking rod 12 a and the winding rods 12 b and a half of the difference is set at not less than a half of a thickness of the leader tape 10 .
  • the anchor portion 12 c is tapered towards the locking rod 12 a and is attached to the engagement arm 13 through insertion so as to prevent separation of the engagement arm 13 and the pin 12 from each other such that the engagement arm 13 and the pin 12 are prevented from being rotated relative to each other.
  • the engagement arm 13 is formed by an elongated plastic molded item curved convexly towards exterior of the cartridge casing 1 and has an engagement slot 16 formed on its inner side face and a guide face 17 inclined downwardly towards the engagement slot 16 .
  • the catch member of the tape drive mechanism is brought into engagement with the opposed engagement slots 16 of the upper and lower engagement arms 13 and is operated so as to draw the tape 3 out of the cartridge casing 1 .
  • a mouth 18 is formed at a longitudinally inner end of the engagement slot 16 .
  • the leader tape 10 is formed by an elastic and hard plastic sheet made of, for example, polyethylene terephthalate or polybutylene terephthalate and a coupling portion 20 is formed at a leading edge of the leader tape 10 .
  • the coupling portion 20 is coupled with the pin 12 so as to be made integral with the leader member 11 .
  • the coupling portion 20 is constituted by a pair of winding pieces 22 which are spaced away from each other by an elongated cutout 21 formed at a central portion of an end of the leader tape 10 . As shown in FIG. 1 , a width H of the cutout 21 is so set as to be slightly larger than a length of the locking rod 12 a of the pin 12 . In FIG.
  • each of the winding pieces 22 is formed by a base portion 23 disposed at its base end portion and having a constant width and a tapered turnover portion 24 extending continuously from the base portion 23 . Opposite corners of a distal end of the turnover portion 24 are rounded smoothly.
  • the leader tape 10 and the leader member 11 are coupled with each other as follows.
  • the turnover portion 24 is wound around each of the winding rods 12 b of the pin 12 and turned over to the base portion 23 .
  • the turnover portion 24 is attached to the base portion 23 by ultrasonic welding.
  • the present invention is characterized in that ultrasonic welding of the turnover portion 24 is performed by using an improved anvil 26 and a welding hone 27 .
  • a central portion and opposite side portions of one end of an upper face of the anvil 26 are removed as a central recess 29 and a pair of opposite side recesses 29 , respectively such that a pair of rectangular anvil faces 28 each for supporting the base portion 23 are defined between the central recess 29 and one of the opposite side recess 29 and between the central recess 29 and the other of the opposite side recesses 29 , respectively.
  • a width B 2 of the anvil face 28 is so set as to be smaller than a maximum width B 1 of the turnover portion 24 .
  • the width B 2 of the anvil face 28 is set at 70% of the maximum width B 1 of the turnover portion 24 but may range from 65% to 75% of the maximum width B 1 of the turnover portion 24 .
  • a completely welded area W 1 having a width equal to the width B 2 of the anvil face 28 is formed from a center to a vicinity of opposite side edges of the turnover portion 24 as shown by coarse hatching in FIG. 2 .
  • a pair of incompletely welded areas W 2 having welding degree lower than that of the completely welded area W 1 are formed as shown by fine hatching in FIG.
  • the coupling portion 20 of the leader tape 10 can be regulated from shifting upwardly or downwardly from a predetermined position. Meanwhile, since a slight gap is formed between the pin 12 and the winding pieces 22 , the leader member 11 and the leader tape 10 are allowed to be rotated relative to each other.
  • a locking member 31 is disposed in the cartridge casing 1 so as to confront the tape window 4 and upper and lower arm supports 32 for supporting the upper and lower engagement arms 13 are provided adjacent to the locking member 19 in the upper and lower casings 1 a and 1 b , respectively as shown in FIG. 3 .
  • the leader member 11 can be held at a proper waiting attitude at all times.
  • the tape 3 is slackened at this time, the previously positioned waiting attitude of the leader member 11 can be held against drop impact. Meanwhile, locking of the locking member 31 is released by inserting a pin from outside of the cartridge casing 1 .
  • FIGS. 9 and 10 show a pair of anvil faces 28 ′ of an anvil 26 ′ employed in a single-reel type tape cartridge according to a second embodiment of the present invention.
  • the anvil face 28 is formed into a rectangular shape as described above.
  • a base portion of the anvil face 28 ′ is expanded into a trapezoidal shape so as to increase a region of the completely welded area W 1 at the distal end of the turnover portion 24 . Since other constructions of this single-reel type tape cartridge of the second embodiment are similar to those of the single-reel type tape cartridge of the first embodiment, the description is abbreviated for the sake of brevity.
  • the turnover portion 24 is tapered towards its distal end but is not required to be tapered towards its distal end.
  • the turnover portion 24 may be at least formed gradually smaller towards its distal end. If necessary, an almost whole portion of the turnover portion 24 may be formed into a rectangular shape having a width slightly smaller than that of the base portion 23 such that the turnover portion 24 is made continuous with the base portion 23 smoothly.
  • the anvil face 28 may be formed gradually smaller towards its base portion so as to make a smaller similar figure of the turnover portion 24 such that the incompletely welded areas W 2 have a constant width.
  • the completely welded area W 1 having the width substantially equal to that of the anvil face 28 is formed in the turnover portion 24 , while the incompletely welded area W 2 is formed between each of the opposite side edges of the completely welded area W 1 and each of the opposite side edges of the turnover portion 24 .
  • the incompletely welded areas W 2 projecting out of the opposite side edges of the anvil face 28 since sufficient frictional heat cannot be obtained, welding degree of a bonding face between the turnover portion 24 and the base portion 23 drops further as a location on the bonding face becomes more distant from the anvil face 28 .
  • the turnover portion 24 can be securely attached to the base portion 23 at a high welding strength, not only reliability of a coupling section between the leader member 11 and the leader tape 10 can be upgraded but material deterioration of the opposite side edges of the turnover portion 24 and the base portion 23 upon thermal welding of the winding piece 22 can be restrained. Hence, fracture of the leader tape 10 from the opposite side edges of the base portion 23 and the turnover portion 24 can be prevented positively. Since the fused resin which has oozed out of the completely welded area W 1 is received by the incompletely welded areas W 2 , it is also possible to prevent ooze of the fused resin out of the opposite side edges of the base portion 23 .
  • the turnover portion 24 is formed gradually smaller towards its distal end such that the incompletely welded area W 2 is formed gradually smaller towards its distal end along each of the opposite side edges of the turnover portion 24 , a length of a welding section of the turnover portion 24 along the pin 12 , on which welding section an external load is likely to be concentrated, namely, a sum of a length of a welding section of the completely welded area W 1 along the pin 12 and a length of welding sections of the incompletely welded areas W 2 along the pin 12 can be made large, so that reliability of the coupling section between the leader member 11 and the leader tape 10 can be further upgraded by increasing welding strength between the turnover portion 24 and the base portion 23 .
  • the width B 2 of the completely welded area W 1 is set at about 70% of the maximum width B 1 of the turnover portion 24 , a surplus width of about 15% of the maximum width B 1 of the turnover portion 24 is left at each of opposite sides of the completely welded area W 1 in the turnover portion 24 .
  • a surplus width of about 15% of the maximum width B 1 of the turnover portion 24 is left at each of opposite sides of the completely welded area W 1 in the turnover portion 24 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

In a single-reel type tape cartridge, a coupling portion of a leader tape includes a pair of winding pieces disposed at opposite sides of a cutout and each winding piece includes a base portion and a turnover portion wound around a pin of a leader member so as to be ultrasonically welded to the base portion. An anvil for supporting the coupling portion of the leader tape has a pair of anvil faces each having a width smaller than that of the turnover portion and ultrasonic welding of the turnover portion to the base portion is performed by supporting the coupling portion on the anvil faces. The turnover portion is divided into a completely welded area having a width substantially equal to that of each of the anvil faces and an incompletely welded area disposed outside each of opposite side edges of the completely welded area.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to a single-reel type tape cartridge in which a leader member is coupled with a leading edge of a tape. The leader member is provided for drawing out the tape to a tape drive mechanism and is coupled with a leader tape joined to a leading edge of a magnetic tape.
  • 2. Description of the Prior Art
  • In order to couple the leader member with the leader tape, it is known from, for example, Japanese Patent Laid-Open Publication No. 2002-324377 that a cutout is formed at a widthwise central location of a coupling portion of the leader tape so as to define a pair of winding pieces at opposite sides of the cutout in the coupling portion and the winding pieces are wound around a pin of the leader member and turned over to the leader tape so as to be attached to the leader tape by ultrasonic welding. By rounding lateral side edges of a welding hone depressed against the winding pieces, one lateral edge of each winding piece adjacent to its distal edge and the other lateral edge of each winding piece adjacent to the pin of the leader member are subjected to welding to a more scatterable degree than other weld zones so as to prevent concentration of loads on the welded lateral edges of each winding piece such that the leader tape is prevented from being fractured at the welded lateral edges of each winding piece.
  • Meanwhile, fused resin may ooze out of peripheral edges of the welded winding pieces so as to be solidified. In order to prevent dropout due to drop of the solidified resin in the tape drive mechanism, it is known from, for example, Japanese Patent Laid-Open Publication No. 2001-357658 that an external shape of a welded portion is made slightly smaller than a shape of the peripheral edge of each winding piece so as to form an unwelded portion along the peripheral edge of each winding piece. A width of the unwelded portion is set at not less than 0.1 mm.
  • In the coupling construction of the leader member in the first prior art document referred to above, since the one lateral edge of each winding piece adjacent to its distal edge and the other lateral edge of each winding piece adjacent to the pin of the leader member are subjected to welding to a more scatterable degree than other weld zones, loads concentrated on the welded lateral edges can be scattered widely. However, from a microscopic viewpoint, as welding is performed more scatteredly, load is more likely to be concentrated on welded spots, so that the welded spots readily undergo separation and breakage and thus, it is impossible to avoid gradual drop of welding strength of the welded spots. Since a droplike space for winding the winding pieces around the pin increases by an amount of separation of the welded spots, the pin becomes loose in the coupling portion of the leader tape disadvantageously.
  • Meanwhile, in the coupling construction of the leader member in the second prior art document referred to above, since the unwelded portion is formed along the peripheral edge of each winding piece, ooze of the fused resin can be prevented. However, since the width of the unwelded portion is small, it is necessary to accurately position a press face of the welding hone relative to the winding pieces and thus, thereby resulting in such an inconvenience as time-consuming and troublesome welding operation.
    • SUMMARY OF THE INVENTION
  • Accordingly, an essential object of the present invention is to provide a single-reel type tape cartridge in which since a winding piece of a leader tape is wound around a pin of a leader member so as to be welded to the leader tape securely at a high welding strength by positively preventing ooze of fused resin out of a peripheral edge of the welded winding piece, reliability of a coupling section between the leader tape and the leader member can be upgraded.
  • Another important object of the present invention is to provide a single-reel type tape cartridge in which by restraining deterioration of material of opposite side edges of the winding piece and the leader tape attached to each other upon thermal welding of the winding piece, fracture of the leader tape from a welded edge of the winding piece can be prevented positively.
  • In order to accomplish these objects of the present invention, a single-reel type tape cartridge according to the present invention includes a leader tape having a coupling portion disposed at its leading edge, a leader member having a pin and an anvil for supporting the coupling portion of the leader tape. The coupling portion is wound around the pin and turned over to the leader tape so as to be attached to the leader tape by ultrasonic welding and includes a pair of winding pieces spaced away from each other by an elongated cutout formed at a central portion of an end of the leader tape. Each of the winding pieces includes a base portion disposed at its base end portion and a turnover portion wound around the pin and turned over to the base portion so as to be attached to the base portion by ultrasonic welding. The anvil has a pair of anvil faces each having a width smaller than that of the turnover portion and ultrasonic welding of the turnover portion to the base portion is performed by supporting the coupling portion on the anvil faces. A completely welded area having a width substantially equal to that of each of the anvil faces is formed from a center to a vicinity of opposite side edges of the turnover portion and an incompletely welded area is formed between each of opposite side edges of the completely welded area and each of the opposite side edges of the turnover portion.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • These objects and features of the present invention will become apparent from the following description taken in conjunction with the preferred embodiments thereof with reference to the accompanying drawings in which:
  • FIG. 1 is a top plan view showing a configuration in which a coupling portion of a leader tape is welded to the leader tape via a pin of a leader member in a single-reel type tape cartridge according to a first embodiment of the present invention;
  • FIG. 2 is an enlarged view of a portion P1 in FIG. 1;
  • FIG. 3 is a top plan view showing an internal structure of the single-reel type tape cartridge of FIG. 1;
  • FIG. 4 is a front elevational view showing an operational state of the single-reel type tape cartridge of FIG. 1, in which the leader member is drawn out of a cartridge casing;
  • FIG. 5 is a vertically sectional side elevational view showing a welding state of the coupling portion of the leader-tape of FIG. 1;
  • FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;
  • FIG. 7 is an enlarged view of a portion P2 in FIG. 6;
  • FIG. 8 is a front elevational view showing a developed state of the coupling portion of FIG. 1;
  • FIG. 9 is a top plan view showing an anvil employed in a single-reel type tape cartridge according to a second embodiment of the present invention; and
  • FIG. 10 is an enlarged view of a portion P3 in FIG. 9.
  • Before the description of the present invention proceeds, it is to be noted that like parts are designated by like reference numerals throughout several views of the accompanying drawings.
    • DETAILED DESCRIPTION OF THE INVENTION
  • Hereinafter, embodiments of the present invention are described with reference to the drawings.
    • First Embodiment
  • FIGS. 1 to 8 show a single-reel type tape cartridge according to a first embodiment of the present invention. In FIGS. 3 and 4, the single-reel type tape cartridge includes a rectangular boxlike casing 1 formed by upper and lower casings 1 a and 1 b which confront each other so as to be bonded to each other. A tape 3 for recording magnetic signals thereon is wound into a single reel 2 disposed inside the cartridge casing 1. A tape window 4 opens on a front wall of the cartridge casing 1 and is selectively opened and closed by a pivotally movable door 5. The door 5 is normally urged towards a closed position of the tape window 4 by a spring and is locked at the closed position by a locking mechanism (not shown). Reel locking pawls 6 and 7 are, respectively, provided at two opposed inner corners of the cartridge casing 1 and are brought into engagement with gear teeth formed on an outer circumference of the reel 2 so as to hold the reel 2 immovably. A switching piece 8 for preventing erroneous erasure is provided on an inner face of a rear wall of the cartridge casing 1.
  • In order to enable a catch member of a tape drive mechanism to automatically catch the tape 3 wound into the reel 2, a leader tape 10 is attached to a leading edge of the tape 3 and a leader member 11 is coupled with an end portion of the leader tape 10. The leader member 11 is formed into a substantially U-shaped frame including a pin 12 made of stainless steel and a pair of engagement arms 13 provided at opposite ends of the pin 12, respectively.
  • As shown in FIGS. 1 and 2, the pin 12 is formed by a thin round rod and has a locking rod 12 a disposed at its central portion and a pair of winding rods 12 b disposed at opposite sides of the locking rod 12 a, respectively. Each of the winding rods 12 b is slightly smaller in diameter than the locking rod 12 a and an anchor portion 12 c is formed at a distal end of each of the winding rods 12 b. A pair of step portions 14 for positioning the leader tape 10 are, respectively, formed at opposite ends of the locking rod 12 a due to a difference in diameter between the locking rod 12 a and the winding rods 12 b and a half of the difference is set at not less than a half of a thickness of the leader tape 10. The anchor portion 12 c is tapered towards the locking rod 12 a and is attached to the engagement arm 13 through insertion so as to prevent separation of the engagement arm 13 and the pin 12 from each other such that the engagement arm 13 and the pin 12 are prevented from being rotated relative to each other.
  • The engagement arm 13 is formed by an elongated plastic molded item curved convexly towards exterior of the cartridge casing 1 and has an engagement slot 16 formed on its inner side face and a guide face 17 inclined downwardly towards the engagement slot 16. The catch member of the tape drive mechanism is brought into engagement with the opposed engagement slots 16 of the upper and lower engagement arms 13 and is operated so as to draw the tape 3 out of the cartridge casing 1. A mouth 18 is formed at a longitudinally inner end of the engagement slot 16.
  • The leader tape 10 is formed by an elastic and hard plastic sheet made of, for example, polyethylene terephthalate or polybutylene terephthalate and a coupling portion 20 is formed at a leading edge of the leader tape 10. The coupling portion 20 is coupled with the pin 12 so as to be made integral with the leader member 11. The coupling portion 20 is constituted by a pair of winding pieces 22 which are spaced away from each other by an elongated cutout 21 formed at a central portion of an end of the leader tape 10. As shown in FIG. 1, a width H of the cutout 21 is so set as to be slightly larger than a length of the locking rod 12 a of the pin 12. In FIG. 8 showing a developed state of the coupling portion 20, each of the winding pieces 22 is formed by a base portion 23 disposed at its base end portion and having a constant width and a tapered turnover portion 24 extending continuously from the base portion 23. Opposite corners of a distal end of the turnover portion 24 are rounded smoothly.
  • The leader tape 10 and the leader member 11 are coupled with each other as follows. As shown in FIGS. 1, 2 and 5, the turnover portion 24 is wound around each of the winding rods 12 b of the pin 12 and turned over to the base portion 23. In a state where there is a slight play between the winding piece 22 and the winding rod 12 b, the turnover portion 24 is attached to the base portion 23 by ultrasonic welding. At this time, the present invention is characterized in that ultrasonic welding of the turnover portion 24 is performed by using an improved anvil 26 and a welding hone 27.
  • More specifically, as shown in FIGS. 6 and 7, a central portion and opposite side portions of one end of an upper face of the anvil 26 are removed as a central recess 29 and a pair of opposite side recesses 29, respectively such that a pair of rectangular anvil faces 28 each for supporting the base portion 23 are defined between the central recess 29 and one of the opposite side recess 29 and between the central recess 29 and the other of the opposite side recesses 29, respectively. As shown in FIGS. 1 and 2, a width B2 of the anvil face 28 is so set as to be smaller than a maximum width B1 of the turnover portion 24. In this embodiment, the width B2 of the anvil face 28 is set at 70% of the maximum width B1 of the turnover portion 24 but may range from 65% to 75% of the maximum width B1 of the turnover portion 24. After the leader member 11 has been positioned and held by a jig (not shown), the base portion 23 and the turnover portion 24 held in contact with each other are placed on the anvil face 28 and gripped between a press face 27 a of the welding hone 27 and the anvil face 28 of the anvil 26. By performing ultrasonic vibrations of the welding hone 27 in this state, the turnover portion 24 and the base portion 23 are welded to each other.
  • In case ultrasonic welding is performed by using the anvil face 28 narrower than the turnover portion 24 as described above, a completely welded area W1 having a width equal to the width B2 of the anvil face 28 is formed from a center to a vicinity of opposite side edges of the turnover portion 24 as shown by coarse hatching in FIG. 2. On the other hand, in opposite side portions of a contact area between the turnover portion 24 and the base portion 23, which project out of opposite side edges of the anvil face 28, a pair of incompletely welded areas W2 having welding degree lower than that of the completely welded area W1 are formed as shown by fine hatching in FIG. 2 because frictional heat obtained by the welding hone 27 becomes smaller as a location on the turnover portion 24 becomes more distant from the anvil face 28. Thus, fused resin pushed out of the completely welded area W1 flows to the incompletely welded areas W2 so as to bond the turnover portion 24 to the base portion 23 also in the incompletely welded areas W2. As a result, material deterioration of the opposite side edges of the turnover portion 24 and the base portion 23 can be eliminated while the turnover portion 24 is securely welded to the base portion 23. Therefore, it is possible to positively prevent such a phenomenon that fracture of the leader tape 10 starts from the opposite side edges of the turnover portion 24 and the base portion 23 upon thermal welding of the winding pieces 22. It is also possible to prevent the fused resin from oozing out of the opposite side edges of the base portion 23.
  • In a state where the coupling portion 20 has been coupled with the pin 12, the lower edge of the upper winding piece 22 and the upper edge of the lower winding piece 22 are, respectively, positioned by the upper and lower step portions 14 of the locking rod 12 a as shown in FIGS. 1 and 2 and thus, the coupling portion 20 of the leader tape 10 can be regulated from shifting upwardly or downwardly from a predetermined position. Meanwhile, since a slight gap is formed between the pin 12 and the winding pieces 22, the leader member 11 and the leader tape 10 are allowed to be rotated relative to each other.
  • In order to hold and fix the leader member 11 at a predetermined waiting attitude when the tape cartridge is not in use, a locking member 31 is disposed in the cartridge casing 1 so as to confront the tape window 4 and upper and lower arm supports 32 for supporting the upper and lower engagement arms 13 are provided adjacent to the locking member 19 in the upper and lower casings 1 a and 1 b, respectively as shown in FIG. 3. When the upper and lower engagement arms 13 are, respectively, supported by the upper and lower arm supports 32 and the locking rod 12 a is gripped by the locking member 31, the leader member 11 can be held at a proper waiting attitude at all times. In addition, even if the tape 3 is slackened at this time, the previously positioned waiting attitude of the leader member 11 can be held against drop impact. Meanwhile, locking of the locking member 31 is released by inserting a pin from outside of the cartridge casing 1.
    • Second Embodiment
  • FIGS. 9 and 10 show a pair of anvil faces 28′ of an anvil 26′ employed in a single-reel type tape cartridge according to a second embodiment of the present invention. In the first embodiment, the anvil face 28 is formed into a rectangular shape as described above. However, in the second embodiment, a base portion of the anvil face 28′ is expanded into a trapezoidal shape so as to increase a region of the completely welded area W1 at the distal end of the turnover portion 24. Since other constructions of this single-reel type tape cartridge of the second embodiment are similar to those of the single-reel type tape cartridge of the first embodiment, the description is abbreviated for the sake of brevity.
  • In the foregoing embodiments, the turnover portion 24 is tapered towards its distal end but is not required to be tapered towards its distal end. The turnover portion 24 may be at least formed gradually smaller towards its distal end. If necessary, an almost whole portion of the turnover portion 24 may be formed into a rectangular shape having a width slightly smaller than that of the base portion 23 such that the turnover portion 24 is made continuous with the base portion 23 smoothly. Furthermore, the anvil face 28 may be formed gradually smaller towards its base portion so as to make a smaller similar figure of the turnover portion 24 such that the incompletely welded areas W2 have a constant width.
  • Hereinafter, marked effects gained in the single-reel type tape cartridge of the present invention are described. Firstly, the completely welded area W1 having the width substantially equal to that of the anvil face 28 is formed in the turnover portion 24, while the incompletely welded area W2 is formed between each of the opposite side edges of the completely welded area W1 and each of the opposite side edges of the turnover portion 24. In the incompletely welded areas W2 projecting out of the opposite side edges of the anvil face 28, since sufficient frictional heat cannot be obtained, welding degree of a bonding face between the turnover portion 24 and the base portion 23 drops further as a location on the bonding face becomes more distant from the anvil face 28. Thus, the fused resin pushed out of the completely welded area W1 flows to the incompletely welded areas W2 so as to bond the turnover portion 24 to the base portion 23 also in the incompletely welded areas W2. As a result, since transfer of frictional heat to the opposite side edges of the turnover portion 24 and the base portion 23 is restricted while the turnover portion 24 is securely welded to the base portion 23, material deterioration of the opposite side edges of the turnover portion 24 and the base portion 23 can be restrained. Therefore, in the single-reel type tape cartridge of the present invention, since the turnover portion 24 can be securely attached to the base portion 23 at a high welding strength, not only reliability of a coupling section between the leader member 11 and the leader tape 10 can be upgraded but material deterioration of the opposite side edges of the turnover portion 24 and the base portion 23 upon thermal welding of the winding piece 22 can be restrained. Hence, fracture of the leader tape 10 from the opposite side edges of the base portion 23 and the turnover portion 24 can be prevented positively. Since the fused resin which has oozed out of the completely welded area W1 is received by the incompletely welded areas W2, it is also possible to prevent ooze of the fused resin out of the opposite side edges of the base portion 23.
  • Secondly, since the turnover portion 24 is formed gradually smaller towards its distal end such that the incompletely welded area W2 is formed gradually smaller towards its distal end along each of the opposite side edges of the turnover portion 24, a length of a welding section of the turnover portion 24 along the pin 12, on which welding section an external load is likely to be concentrated, namely, a sum of a length of a welding section of the completely welded area W1 along the pin 12 and a length of welding sections of the incompletely welded areas W2 along the pin 12 can be made large, so that reliability of the coupling section between the leader member 11 and the leader tape 10 can be further upgraded by increasing welding strength between the turnover portion 24 and the base portion 23.
  • Thirdly, since the width B2 of the completely welded area W1 is set at about 70% of the maximum width B1 of the turnover portion 24, a surplus width of about 15% of the maximum width B1 of the turnover portion 24 is left at each of opposite sides of the completely welded area W1 in the turnover portion 24. Hence, even if accuracy of positioning the base portion 23 relative to the anvil face 28 is low, ooze of the fused resin out of the opposite side edges of the base portion 23 can be prevented by securely welding the turnover portion 24 to the base portion 23. Therefore, in contrast with conventional welding in which a press face of a welding hone is required to be accurately positioned relative to the winding pieces, winding operation can be easily performed rapidly, thereby resulting in rise of production efficiency of the tape cartridge.

Claims (4)

1. A single-reel type tape cartridge comprising:
a leader tape which includes a coupling portion disposed at its leading edge;
a leader member which includes a pin; and
an anvil for supporting the coupling portion of the leader tape;
wherein the coupling portion is wound around the pin and turned over to the leader tape so as to be attached to the leader tape by ultrasonic welding and includes a pair of winding pieces spaced away from each other by an elongated cutout formed at a central portion of an end of the leader tape;
wherein each of the winding pieces includes a base portion disposed at its base end portion and a turnover portion wound around the pin and turned over to the base portion so as to be attached to the base portion by ultrasonic welding;
wherein the anvil has a pair of anvil faces each having a width smaller than that of the turnover portion and ultrasonic welding of the turnover portion to the base portion is performed by supporting the coupling portion on the anvil faces;
wherein a completely welded area having a width substantially equal to that of each of the anvil faces is formed from a center to a vicinity of opposite side edges of the turnover portion and an incompletely welded area is formed between each of opposite side edges of the completely welded area and each of the opposite side edges of the turnover portion.
2. The single-reel type tape cartridge as claimed in claim 1, wherein the turnover portion is formed gradually smaller towards its distal end such that the incompletely welded area is formed gradually smaller towards its distal end along each of the opposite side edges of the turnover portion.
3. The single-reel type tape cartridge as claimed in claim 1, wherein a width of the completely welded area is set at about 70% of a maximum width of the turnover portion.
4. The single-reel type tape cartridge as claimed in claim 2, wherein a width of the completely welded area is set at about 70% of a maximum width of the turnover portion.
US10/984,899 2003-11-13 2004-11-10 Single-reel type tape cartridge Abandoned US20050161544A1 (en)

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JP2003-383497 2003-11-13
JP2003383497A JP4360614B2 (en) 2003-11-13 2003-11-13 Single reel type tape cartridge

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US12/613,230 Active US7967931B2 (en) 2003-11-13 2009-11-05 Single-reel type tape cartridge

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US20060278609A1 (en) * 2003-05-16 2006-12-14 Applied Materials, Inc. Method of determining wafer voltage in a plasma reactor from applied bias voltage and current and a pair of constants
US20070170294A1 (en) * 2006-01-20 2007-07-26 Quantum Corporation Cartridge buckle reinforcement and damage indicator
CN113829629A (en) * 2021-09-26 2021-12-24 昆山欧嘉塑胶有限公司 Reel manufacturing production line and manufacturing process thereof

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US20020162911A1 (en) * 2001-04-26 2002-11-07 Tdk Corporation Leader tape and tape cartridge
US6482291B1 (en) * 2000-02-23 2002-11-19 Shikoku Kakoki Co., Ltd. Ultrasonic sealing apparatus
US6502776B2 (en) * 2000-06-01 2003-01-07 Hitachi Maxell, Ltd. Tape leader member in a single-reel tape cartridge

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JP4386311B2 (en) * 2000-06-14 2009-12-16 日立マクセル株式会社 Single reel type magnetic tape cartridge

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US3867232A (en) * 1972-05-22 1975-02-18 Eastman Kodak Co Ultrasonic splicing apparatus
US6482291B1 (en) * 2000-02-23 2002-11-19 Shikoku Kakoki Co., Ltd. Ultrasonic sealing apparatus
US6502776B2 (en) * 2000-06-01 2003-01-07 Hitachi Maxell, Ltd. Tape leader member in a single-reel tape cartridge
US20020162911A1 (en) * 2001-04-26 2002-11-07 Tdk Corporation Leader tape and tape cartridge
US6655623B2 (en) * 2001-04-26 2003-12-02 Tdk Corporation Leader tape and tape cartridge

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Publication number Priority date Publication date Assignee Title
US20060278609A1 (en) * 2003-05-16 2006-12-14 Applied Materials, Inc. Method of determining wafer voltage in a plasma reactor from applied bias voltage and current and a pair of constants
US20070170294A1 (en) * 2006-01-20 2007-07-26 Quantum Corporation Cartridge buckle reinforcement and damage indicator
US7484681B2 (en) * 2006-01-20 2009-02-03 Quantum Corporation Cartridge buckle reinforcement and damage indicator
CN113829629A (en) * 2021-09-26 2021-12-24 昆山欧嘉塑胶有限公司 Reel manufacturing production line and manufacturing process thereof

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GB2408141C2 (en) 2011-09-28
US20100050413A1 (en) 2010-03-04
GB2408141B (en) 2007-05-30
GB2408141C (en) 2011-08-10
GB0424718D0 (en) 2004-12-08
JP2005149587A (en) 2005-06-09
JP4360614B2 (en) 2009-11-11
US7967931B2 (en) 2011-06-28
GB2408141A (en) 2005-05-18

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