Abstract: A recording tape cartridge is equipped with a reel around which is wound recording tape and an upper case and a lower case that house the reel. Ribs whose rib height gradually becomes lower from a center side of the reel toward an outer peripheral side of the reel are formed on an inner surface of the upper case. Edge portions that slant linearly from the center side of the reel toward the outer peripheral side of the reel are formed on the reel side of the ribs. The distance of the space inside the case in the thickness direction of the recording tape cartridge is wider on the outer peripheral side of the reel in comparison to the center side of the reel, so it is difficult for the recording tape inside the case to sustain damage even if the recording tape cartridge receives an impact.

Abstract: A recording tape cartridge which includes a case, a reel including a hub accommodated in the case, a locking member supported to be non-rotatable relative to the case and disposed within the hub, and a switching member disposed in the case. The hub is provided with an engaging portion therein. The locking member can attain a rotation-locking position, at which the locking member engages with the engaging portion and fills a gap between the reel and the case in an axial direction of the reel, and a rotation-enabling position, at which the state of engagement with the engaging portion is released and the locking member being withdrawn from the gap. The switching member retains the locking member at the rotation-locking position at times of non-use of the recording tape, and moves the locking member to the rotation-enabling position when operated in a predetermined direction by a drive device.

Abstract: A recording tape cartridge includes a reel, a case where the reel is accommodated, an engagement gear that is provided in the reel, and a brake gear which is provided in the case side brake member and in which a mesh state with the engagement gear or a mesh release state with the engagement gear is switched by relative displacement of an axis line direction of the brake member with respect to the reel. In a piece taper tooth of the engagement gear, a mesh surface that is oriented in a winding rotation direction is approximately parallel to a reel axis line direction and an opposite mesh surface is inclined with respect to the reel axis line. A piece taper tooth of the brake gear is a taper tooth that is opposite to the piece taper tooth of the engagement gear.

Abstract: A recording tape cartridge is provided that prevents damage to a recording tape if it experiences a shock. The recording tape cartridge includes a reel on which a recording tape T is wound, an upper case and a lower case that form the case thereof, a reel accommodated between the upper case and lower case, and a compression coil spring that urges the reel against the lower case. An allowable lower limit value of the distance between the reel and the upper case is defined by the spring axial-direction length of the compression coil spring when it is most compressed.

Abstract: A recording tape cartridge can prevent release of rotation locking of a reel with respect to a case accompanying dropping of the recording tape cartridge. The tape recording cartridge is configured to rotatably accommodate within a case a reel that has magnetic tape wound on a reel hub. Within the reel hub, external teeth of a brake gear, of a brake member that is supported so as to be non-rotatable with respect to the case, mesh with an engaged gear having internal teeth, preventing rotation of the reel with respect to the case. Lock portions of lock members are inserted between the reel positioned biased to a bottom panel side by a compression coil spring, and a top panel, thereby preventing movement of the reel with respect to the case in the reel axial direction.

Abstract: A recording tape cartridge includes: a reel that includes a bottomed circular cylinder-shaped hub; a case that includes a top plate and a bottom plate, with the reel being singly housed in the case such that the reel is movable along an axial line direction between the top plate and the bottom plate; a ring-shaped member that is fixedly attached to the inner peripheral surface of the hub; an engagement gear formed on the ring-shaped member such that its teeth surface is substantially parallel to the axial line of the reel; and a brake member having a brake gear that is capable of meshing with the engagement gear. The brake gear, by being displaced in the axial line direction of the reel, can take a rotation lock position where the brake gear meshes with the engagement gear and a rotation allowance position where the meshing is released.

Abstract: A method to write information to, or retrieve information from, an information storage medium disposed within a portable data storage cartridge moveably disposed in a data storage and retrieval system, wherein the data storage and retrieval system further comprises a data storage device. The portable data storage cartridge comprises a moveable curved door slidingly disposed within the enclosure, and a tape reel rotatably disposed within the enclosure, wherein the moveable curved door and the tape reel are non-concentric. The method retrieves the portable data storage cartridge from a storage slot, transports that portable data storage cartridge to a data storage device, disposes the portable data storage cartridge in the data storage device. The method further moves the moveable curved door from said a position to a second position, and reads information from and/or writes information to, the information storage medium.

Abstract: A reel comprising a hub formed in the shape of a cylindrical tube with a base, on an outer peripheral surface of which a recording tape is wound; a base side flange portion that projects-out to a radial direction outer side of a base portion side of the hub; a flange member configured in a disc shape or an annular plate shape of a material with an elastic modulus at least equal to a material that constitutes the hub, the flange member being coaxially joined to an opening end portion of the hub; a metal plate formed in a circular plate shape or an annular plate shape, which is fixed coaxially to the base portion of the hub; and plate retention portions that are formed integrally with the base portion of the hub and touch an outer peripheral surface of the metal plate at at least four locations, which are at equal intervals in a circumferential direction of the hub.

Abstract: The invention of the present application provides a reel, which can improve the dimensional accuracy of a hub, having a configuration in which a reinforcing tubular member is disposed on the hub by insert molding. A resin layer extends from one end portion side of the hub at which a first flange is integrally formed in a height direction of the hub. The resin layer is disposed on an inner peripheral surface of the tubular member in the reel. The reel is provided with a resin hub having an outer peripheral surface on which a recording tape T is wound, the first flange is integrally formed at one end portion of the hub, a second flange is welded at the other end portion of the hub, and a reinforcing tubular member is disposed on an inner peripheral surface of the hub by insert molding.

Abstract: A tape and reel combination and tape and reel combination manufacturing method are provided that can prevent edge-folding occurring to edges of a recording tape that has been wound on a hub. In a reel having a hub on which recording tape is wound, a first flange provided at a one end of the hub, and a second flange provided at the other end of the hub, at the reel radial direction outside of the recording tape T wound on the hub, a first region and a second region are formed, as specific regions, in sequence from the radial direction inner side of the first region. In the first region the recording tape is positioned offset toward the first flange side, and in the second region the recording tape is positioned offset toward the second flange side.

Abstract: An information recording medium capable of avoiding insertion of a sheet material into a drive unit. The information recording medium is comprised of a tape cartridge that rotatably accommodates a tape reel wound with a tape-shaped recording medium (magnetic tape), a storage case that accommodates the tape cartridge, and a sheet material that is accommodated in the storage case together with the tape cartridge. The sheet material is formed to have a size in an unfolded state small enough to be accommodated in the storage case, and is accommodated in the storage case in a state where the sheet material is folded along a folding line.

Abstract: The invention of the present application provides a reel, which comprises a cylindrical resin hub with a base and an outer peripheral surface around which a recording tape is wound, a reel gear formed at an outer surface of a base portion of the hub which engages with a drive gear of a drive device, a metal reel plate provided at the outer surface of the base portion of the hub on a radially inner side of the reel gear by insert molding, a gate trace formed on the base portion of the hub, and a plurality of groove portions formed at regular intervals in a circumferential direction between the reel gear and the reel plate. The groove portions are formed at least at a predetermined area on a virtual straight line connecting a center portion of the hub and a gate trace.

Abstract: A recording tape cartridge includes a case that comprises an upper case and a lower case and houses a reel around which recording tape is wound. A regulating wall that defines an area in which the reel is housed is formed on the upper case and on the lower case. An attachment member is held between the regulating wall of the upper case and the regulating wall of the lower case so as to be disposed on an outer peripheral surface side of the regulating wall. The attachment member holds an RFID. There is provided a recording tape cartridge that can ensure an attachment region for an RFID inside a case.

Abstract: A recording tape cartridge comprises: a case that comprises an upper case and a lower case and houses a reel around which recording tape is wound; a regulating wall that is formed at least on the lower case and defines an area in which the reel is housed; a holding wall that is formed a predetermined space away from an outer peripheral surface of the regulating wall; and an RFID that is housed in the space between the regulating wall and the holding wall.

Abstract: A recording tape cartridge that can secure the attached region of an RFID in a case is provided including: a case that has an upper case and a lower case and houses a reel around which a recording tape is wound; a restricting wall that is formed at least in the lower case and defines an area in which the reel is housed; a housing portion that is formed between the restricting wall and the corner of the case; and a planar RFID that is provided in the housing portion such that the rotational axis direction of the reel is a normal line direction.

Abstract: A reel is disposed with a reel hub made of resin whose outer peripheral surface is configured as a tape take-up surface and a reinforcement ring that is integrated with the reel hub by insert molding. On a bottom plate of the reel hub, there are formed: marks of gates that are disposed on a radial direction inner side with respect to the reinforcement ring and are used for injecting, into a die, a resin material that molds the reel hub; and at least one of thick portions that are positioned on the reinforcement ring side with respect to the marks of the gates and thin portions that are positioned on both sides, in a circumferential direction of the reel hub, with respect to the marks of the gates.

Abstract: The reel includes a reel hub that is made of a resin material and is formed into a cylindrical shape, an upper flange that is made of a resin material and is extended integrally outward in a radial direction from one end portion in an axial direction of the reel hub, and a reinforcement ring that is integrally disposed radially inside a tape take-up surface of the reel hub by insert molding and reinforces the reel hub in the radial direction. A position of an upper end of the reinforcement ring coincides with a position of an upper end of the tape take-up surface in the axial direction of the reel hub.

Abstract: A reel which can substantially equalize the rigidity at both ends in an axis line direction of a reel hub is obtained with using a small and light-weight reinforcing ring, and a recording tape cartridge which can well protect the recording tape is obtained by applying this reel. The reel includes a resin reel hub which is formed into a cylindrical shape with a bottom portion; a resin upper flange which is integrally extended from an opening end portion of the reel hub toward a radial outside; a resin lower flange member which has a lower flange, the lower flange facing the upper flange, in being welded to a bottom plate of the reel hub in a center portion; and a reinforcing ring which reinforces a part of the reel hub in the axis line direction, the part including the opening end in a cylindrical wall of the reel hub.

Abstract: A tape reel includes a hub in the shape of a bottomed-cylinder with a disc-like lower flange integrally formed at a lower end thereof and an opening formed at an upper end thereof; and an upper flange that is disc-like, has a center hole formed therein, and has a ring-shaped protrusion formed so as to protrude at a rim of the center hole, the protrusion being fitted into and fixed at the opening of the hub. The upper flange is constructed by forming the rim of the center hole thicker than other parts aside from the rim.

Abstract: A tape reel including: a substantially circular cylinder shaped hub; flanges provided as separate bodies from the hub at both end portions of the hub; a connecting member connecting together the flanges at the inside of the hub, in a non-contact state with the inner peripheral face of the hub. The recording tape is wound on the hub in such a manner that the side of the recording tape with the smaller radius of tape edge curvature is on the smaller diameter side of the hub. Also disclosed are: a recording tape cartridge housing such a tape reel; a take-up reel provided in a drive device; a drawing-out member, housed in the hub of a take-up reel and on which recording tape drawn-out from a recording tape cartridge is wound; and a drive device with take-up reel and drawing-out member.

Abstract: A reel is provided including a cylindrical hub onto which a recording tape is wound; an upper flange that is integrally provided at the hub, and that extends from one end portion of the hub; and a lower flange that includes a bottom wall to which a reel plate is fixed, and that is welded to the other end portion of the hub, in order that deformations and surface runout of the flanges can be suppressed without increasing number of process and/or manufacturing costs.

Abstract: A tape cartridge includes a case having a first through-hole and a second through-hole in the bottom of a first container, a reel disposed within the case and having a cylindrical hub portion with a bottom, a tape wound around the hub portion such that the tape can be fed out, and a reel lock mechanism that allows the reel to be immovably supported. The reel lock mechanism includes an interposing member that can move vertically in the thickness direction of the case, and a support member. The support member includes a first pedestal portion that, in a state in which the reel has been put in contact with the second container and the interposing member has been put in contact with the reel, is positioned immediately below the interposing member and thus immovably supports the interposing member; and an operating portion that is disposed in the first through-hole and allows, with a predetermined operation, support of the interposing member and release of support of the interposing member.

Abstract: Provided is a reel capable of improving the rigidity of the hub and maintaining the tape characteristics. A single resin layer 36 lying below an aluminum ring 112 in an axial direction of the reel hub 32 and having a wall thickness t2 of 0.8-1.7 mm can suppress the partial rigidity reduction of the reel hub 32. This can suppress the partial characteristic deterioration of a recording tape T wound on the reel hub 32 (partial broadening of the width of the recording tape T, etc.). Besides, crack occurrence can be reduced in the single resin layer 114 of the reel hub 32.

Abstract: A recording tape cartridge includes a leader member that is attached to an end portion of recording tape and on both ends of which flange portions are formed, and holding portions that are formed in an upper case and a lower case and hold the leader member in the vicinity of an opening. Projecting portions are formed on the holding portions and overlap the flange portions on inner surface sides of the flange portions. Through holes are formed in the upper case and the lower case, whereby undercut portions are not present in the projecting portions. The case of the recording tape cartridge can be molded without complicating the configuration of the mold.

Abstract: A tape cartridge suitable for high density recording of information signals is provided by enhancing the form accuracy and the assembly precision of a flange fixed to a hub to achieve a high-precision tape reel. The tape reel is placed inside a main casing for winding and storing a recording tape. The tape reel is composed of an upper flange and a hub integrally having a lower flange. The upper flange joined to the upper surface of the hub is fastened and fixed with a screw screwed into the hub from the upper side of the upper flange. The upper flange is fastened and fixed to the hub with a plurality of screws provided in positions away from the central axis of rotation of the tape reel.

Abstract: A recording tape cartridge includes: a reel having a cylindrical hub with a bottom and a reel gear formed therein with recording tape wound therearound; a casing; a brake component; and a releasing component that is provided between the bottom of the hub and the brake component and which has plural legs inserted through plural through-holes formed on the reel gear where, when in use, the plural legs are pressed upwards by a drive gear of a drive device, whereby the releasing component lifts the brake component, releases engagement with the engaging portion and rotates with the reel. The legs are formed into approximate D shapes in plan view whose outer side surfaces facing an inner peripheral surface of the hub are flat surfaces, while the through-holes are formed into approximate D shapes in plan view through which the legs can each be inserted.

Abstract: A recording tape cartridge comprises a single reel at which a recording tape is wound around a hub, a case rotatably accommodating the reel, an opening for pulling-out of a leader member attached to an end portion of the recording tape, and a tape guide which the recording tape slidingly contacts is provided within the case. After the recording tape slidingly contacts the tape guide, the recording tape is taken-up at a drive device, and therefore, traveling of the recording tape is stable. In this way, occurrence of reading errors of servo signals and recording/playback errors of data signals at a drive device can be reduced, even with recording tapes whose recording densities are improved.

Abstract: A reel that includes: an upper flange and a lower flange that retain width direction edge portions of a recording tape; a lower circular cylinder portion disposed extending upward from an upper surface of the lower flange on the same circumference as the axial center of the lower flange; a hub that is fitted over the outside of the lower circular cylinder portion and around which the recording tape is wound; a rotational detent member that regulates movement of the hub in the circumferential direction with respect to the lower flange; and an upper circular cylinder portion that extends downward from an undersurface of the upper flange and is welded to an end surface of the lower circular cylinder portion such that the hub is interposed and held between the upper flange and the lower flange. A recording tape cartridge that includes this reel.

Abstract: In a single-reel type tape cartridge of a servo tracking system in which signal recording is performed, a tape reel capable of eliminating edge projection during tape winding and achieving high recording density of a magnetic tape and a magnetic tape cartridge for housing the tape reel is provided. The tape reel is provided with a cylindrical hub around which the magnetic tape is wound and a pair of upper and lower flanges. The average value of the thickness of a reference flange that receives the tape edge of the magnetic tape during tape winding is set greater than the average value of the thickness of the opposite flange. The tape receiving surface of the reference flange is formed into an inclined surface, and three or more air escape recess portions are formed on the tape receiving surface. The depth of each air escape recess portion is set not smaller than 0.05 mm and not greater than 0.40 mm.

Abstract: Sliding resistance at a time when a locking member is moved between a locking position and an unlocking position with respect to a reel can be lessened, and deformation of a flange welded to a hub also can be suppressed. In a recording tape cartridge 10 in which a reel 20, at which an upper flange 24 is welded to a hub 22, is singly and rotatably accommodated within a case 12, a locking member 70 is configured to be able to rotate within a plane orthogonal to a rotation axis direction of the reel 20 around a position which is different from a rotational center of the reel 20.

Abstract: A data storage tape cartridge is disclosed. The data storage tape cartridge includes a housing, at least one tape reel assembly, a storage tape, and a radio frequency write medium. The housing defines first and second housing sections that are reciprocally mated to form an enclosed region. The tape reel assembly/ies is/are rotatably disposed within the enclosed region, and the storage tape is wound about a hub of the tape reel assembly/ies. The radio frequency write medium is coupled to one of the housing and the tape reel assembly and has cartridge initialization information stored thereon.

Abstract: A structure to be grasped in which a member can be grasped by a pair of grasping portions having respective grasping recesses of the same shape. A clutch member has rotation-limiting ribs and seating ribs formed on and projecting from a clutch body, and each set of a rotation-limiting rib and a seating rib are arranged on an imaginary straight line L1. When a pair of chuck members of a grasping device are moved away from each other along an imaginary straight line L2 coinciding with the imaginary straight line L1, the clutch member is grasped by the pair of chuck members. Although the rotation-limiting ribs and the seating ribs are different in shape from each other in order to meet their respective functional requirements, chucked portions of the rotation-limiting rib and seating rib, for fitting into the respective grasping recesses of the chuck members, have substantially the same shape.

Abstract: A data storage tape cartridge has a housing, at least one tape reel assembly rotatably disposed within the housing, a storage tape wound about a tape winding surface of the tape reel assembly, and a brake assembly. The brake assembly includes a brake plate and a brake button. When the brake assembly is an unlocked position, a depression in the brake plate mates with a protruding member of the brake button to limit vibration of the brake assembly, thereby limiting noisy vibration of cartridge.

Abstract: A resin ring is integrally formed on an outer peripheral face of a metal ring to form a hub. On a lower end portion side of the resin ring, a step portion exposing the metal ring is formed. A positioning portion with which the step portion of the hub can be fitted is formed at a central portion of a lower flange. Positions in a height direction of lower end faces of the resin ring and the metal ring are different from each other. Even if a minute gap exists between the metal ring and a metal mold for molding the hub and fluid resin flows into the gap to produce a burr, the burr does not reach the lower end face of the metal ring. Therefore, variations due to the burr do not occur in the lower end face of the hub for positioning in dimension of product.

Abstract: A cartridge case for a magnetic tape cartridge made up of two mating shell halves are provided with a retaining structure for retaining an in-cartridge memory tag at a given angle in the cartridge case. The retaining structure comprises supporting brace members in one mating shell halve which has an angled surface extending at an elevation angle equal to the given angle and holding brace members in the other mating shell halve which has an angled leading surface extending at a depression angle equal to the elevation angle of the angled surface of the support brace member and a angled trailing surge extending at a depression angle greater than the angled leading surface between which the in-cartridge memory tag is held tightly in position in the cartridge case when the two mating shell halves are temporarily or finally coupled to each other.

Abstract: An aspect of the present invention relates to a magnetic tape reel. The magnetic tape reel comprises a hub on which a magnetic tape is wound, and a flange provided on at least one of upper and lower ends of the hub. The flange comprises a surface coating on at least a portion of a surface thereof on the hub side, the surface coating having a hardness equal to or greater than a hardness of an edge surface of the magnetic tape. A further aspect of the present invention relates to a magnetic tape cartridge comprising a magnetic tape and the magnetic tape reel.

Abstract: A magnetic tape cartridge includes a reel around which a magnetic tape is wound, a cartridge casing accommodating the reel rotatably, a reel locking member, a biasing member, a spider, and a lubricant. The reel locking member includes a convex sliding portion and engages with the reel to block a rotation thereof. The biasing member biases the reel locking member so that the reel locking member engages with the reel. The spider includes a supporting surface that comes into contact with the sliding portion and has a concave portion concaved at substantially the center thereof, and a wall portion that surrounds the supporting surface, the spider pushing and moving the reel locking member against a bias force of the biasing member to release the engagement between the reel locking member and the reel. The lubricant is applied between the sliding portion and the supporting surface.

Abstract: Disclosed are a reel structured such that a recording tape can be wound on a hub without interference with a pair of flanges provided in opposing relationship to each other, and a method of designing such a reel. The hub is formed in a tapered shape, and a taper angle of the hub is determined from an expression ?<sin?1(G/L), where G is a spacing along an axial direction of the hub between the edge of the recording tape on the larger-diameter end portion of the hub at a winding start end of the recording tape and the flange on the larger-diameter side, and L is a winding length of the recording tape which is required to establish a state in which the recording tape can withstand a given tension when wound onto the hub.

Abstract: Provided is a film package assembly to be used within a camera such that conventional winding and rewinding components are eliminated. Provided is a film package assembly which includes a new light-tight film canister device, a roll of film and a film take-up cartridge. The film package assembly being designed so as to be loadable within a camera in non-darkroom or lighted conditions.

Abstract: The invention of the present application provides a reel, which comprises a cylindrical resin hub with a base and an outer peripheral surface around which a recording tape is wound, a reel gear formed at an outer surface of a base portion of the hub which engages with a drive gear of a drive device, a metal reel plate provided at the outer surface of the base portion of the hub on a radially inner side of the reel gear by insert molding, a gate trace formed on the base portion of the hub, and a plurality of groove portions formed at regular intervals in a circumferential direction between the reel gear and the reel plate. The groove portions are formed at least at a predetermined area on a virtual straight line connecting a center portion of the hub and a gate trace.

Abstract: The present invention provides a reel having an engaging portion that can engage accurately with a braking member. A reel 30 has: a hub 32, an extending portion 36 being formed at a peripheral edge of a lower end portion of the hub 32; an upper flange 38 provided integrally at a peripheral edge of an upper end portion of the hub 32 so as to extend outward; and a lower flange 40 having a floor wall 42 to which a reel plate 46 is fixed, the lower flange 40 being welded to the extending portion 36 of the hub 32. In this reel 30, an engaging portion 48 is formed at the lower flange 40, the engaging portion 48 engaging with a braking member 60 that is held so as to be unable to rotate at the case 12 at times of non-use.

Abstract: At a reel, an outer peripheral surface of a cylindrical tube portion of a reel hub is a tape winding surface around which a magnetic tape is wound. In a free state, the tape winding surface forms a substantial taper shape in which an outer diameter is greater at an upper end portion side where a radial direction rigidity is relatively low, than at a lower end portion side where the rigidity is high. In a state in which a magnetic tape is wound, the tape winding surface can form a shape that is substantially symmetrical with respect to a transverse direction of the magnetic tape. As a result, the reel and a recording tape cartridge are obtained in which the outer peripheral surface of the hub forms a proper shape in a state in which a recording tape is wound.

Abstract: An apparatus for locking a rotatable portion of a storage device is provided. The apparatus comprises a component irrotatably engaged with the rotatable portion, the component having first teeth for engaging second teeth disposed on a surface irrotatable with respect to the component. A spring is disposed between the component and the reel to urge engagement of the first teeth and the second teeth. The component is slidably engaged with the reel such that by pulling on the component, the component slides with respect to the reel and the first teeth disengage from the second teeth, thereby permitting the reel and the component to rotate. A method for accessing media disposed on the reel includes pushing the reel away from a bottom portion of the storage device, pulling down on the component to disengage the first teeth from the second teeth, and rotating the reel to access the media.

Abstract: A guide roller mounted in a tape drive for reducing mechanical noise associated with travel of a magnetic tape medium in a tape path is provided. The guide roller includes a cylindrical barrel, which is rotatably coupled to a tape drive. The cylindrical barrel rotates as the magnetic tape medium is guided by the guide roller as it travels through the tape path. A continuous helical groove forms a spiral on the outer surface of the cylindrical barrel along the length of the cylindrical barrel. The continuous helical groove forms contiguous rings of the spiral.

Abstract: A reel is provided that may raise the rigidity of the hub, and suppress flange deformation that is caused by winding tension of recording tape. The reel is provided with: a cylindrical hub on which recording tape may be wound; a top flange extending integrally to the hub from a peripheral edge at one end portion of the hub; a bottom flange, including a bottom wall that has had a reel plate fixed thereto, the bottom flange being welded to a portion of the hub at the opposite end of the hub to the end of the top flange, the welding site being within the region where the reel plate is fixed.

Abstract: In a tape reel that includes a hub around which recording tape is wound and flanges disposed on both end portions of the hub, the elastic modulus in a radial direction of the hub is equal to or greater than 16.0 GPa, and the hub includes different radii on one end side thereof and another end side thereof. The recording tape is wound around the hub such that the side where the radius of curvature of the curvature of a tape edge of the recording tape is small corresponds to the small radius side of the hub. When the recording tape is wound around the hub, fluctuation of the recording tape in an axial direction of the hub is controlled, and one-layer protrusion and disorderly winding of the recording tape that has been wound around the hub are controlled.

Abstract: A tape reel including: a substantially circular cylinder shaped hub; flanges provided as separate bodies from the hub at both end portions of the hub; a connecting member connecting together the flanges at the inside of the hub, in a non-contact state with the inner peripheral face of the hub. The recording tape is wound on the hub in such a manner that the side of the recording tape with the smaller radius of tape edge curvature is on the smaller diameter side of the hub. Also disclosed are: a recording tape cartridge housing such a tape reel; a take-up reel provided in a drive device; a drawing-out member, housed in the hub of a take-up reel and on which recording tape drawn-out from a recording tape cartridge is wound; and a drive device with take-up reel and drawing-out member.

Abstract: A recording medium cartridge and producing method thereof, such that slidability of resin-fabricated members of different materials against one another can be assured even in conditions in which impacts are successively applied. The recording medium cartridge is provided with a recording medium T and a plurality of resin-fabricated components. A mixture C of perfluoropolyethylene and polytetrafluoroethylene is interposed at boundary surfaces at which the resin-fabricated components of different material slide against one another and/or at boundary surfaces at which the resin-fabricated components of different material slide against one another.

Abstract: To provide a water-soluble film roll 3 having end faces 4 with masking materials 5 adhered thereto. By using the water-soluble film roll 3 and paying out a water-soluble film 1 while holding the masking materials 5 adhered to the end faces 4, it is possible to prevent moisture from adhering to the end faces 4 and to prevent the water-soluble film 1 from rupturing due to welding of the film 1 with itself. In this connection, the masking materials 5 are preferably a plastic film capable of being adhered to the end faces 4 with a pressure-sensitive adhesive.

Abstract: A tape reel, a recording tape cartridge, a take-up reel, and a drive device, in which displacement of recording tape in an axial direction of a hub may be suppressed during traveling and occurrence of reading errors of servo signals and recording/reproducing errors of data signals may be suppressed are obtained. The reel hub is integrally formed with a lower flange and a radius of the reel hub on an upper flange side is greater than a radius on a lower flange side. By winding the recording tape T around the reel hub in such a manner that a side having a smaller radius of curvature of a tape edge is on the lower flange side of the reel hub, the displacement of the recording tape T in the axial direction of the reel hub during traveling is suppressed. As a result, recording and reproducing errors of servo signals and recording signals may be suppressed and reduction of so-called position error signals and off-track errors may be expected even in a case of high-density recording.