Abstract: A magnetic tape cartridge includes a substantially rectangular box shaped case that houses, inside a housing area, a single reel wound with a magnetic tape and equipped with a reel plate that is attracted and held by magnetic force when loaded into a drive device, and a metal-containing block that is disposed inside the case and outside the housing area of the reel, and has a proportion of metal by mass to a total mass of metal provided inside the case including the reel equipped with the magnetic tape and the reel plate of 18% or greater.

Abstract: A recording tape cartridge includes a release member, a sliding protrusion portion, a metallic plate and a reference portion. The release member is provided in a reel hub to be rotatable integrally with the reel. The release member moves a locking member from a locking position to an allowing position when a pushing surface of the release member is pushed from an outer side of a case. The sliding protrusion portion protrudes from the locking member toward the side thereof at which the release member is disposed. The metallic plate is provided in the release member. A distal end of the sliding protrusion portion touches the metallic plate. The reference portion is provided at the release member. The reference portion positions a position of the metallic plate relative to the pushing surface in the axial direction of the reel.

Abstract: There is provided a tape cartridge housing case, the case including (1) a case body having an upper wall portion that covers an upper face of a tape cartridge, a lower wall portion that covers a lower face of the tape cartridge, and an opening that the tape cartridge is inserted and removed through, (2) a first protrusion that is formed at an inner face of the lower wall portion, and that anchors an anchored portion, (3) a recess that is formed at an outer face of the lower wall portion at a position so as to be on the opposite side to the first protrusion in a front face-back face relationship, and (4) a second protrusion that is formed at an outer face of the upper wall portion at the same position as the recess in plan view.

Abstract: A mold for manufacturing a reel component member, the mold comprises a hub formation portion configured to form a circular tube shaped hub; a flange formation portion configured to form a flange integrally provided at one end portion of the hub; a bottom plate formation portion configured to form a bottom plate that is provided with a ring shaped reel gear at the one end portion or another end portion of the hub and that includes a plurality of hole portions provided at equal intervals on the reel gear; a gate that is disposed further to a radial direction inside than a wall face of the hub formation portion that is configured to form an inner peripheral face of the hub; and an anticorrosion coating that is applied to a wall face of the hub formation portion that is configured to form an outer peripheral face of the hub.

Abstract: A reel comprises a bottomed circular tube shaped hub that has an outer peripheral face for winding a recording tape around; a first flange that is integrally molded to one end portion of the hub; a second flange that is joined to another end portion of the hub; a plurality of hole portions that are provided at equal intervals on a ring shaped reel gear formed at a lower face of a bottom plate of the hub; and a gate mark that is formed at the bottom plate of the hub, further to a radial direction inside than an inner peripheral face of the hub, wherein a difference in surface roughness between a weld portion and a non-weld portion on the outer peripheral face of the hub is 0.25 ?m or less.

Abstract: There is provided a reel, the reel in which a difference in winding radii across the entire recording tape width between a winding terminal end of a first turn and a winding start end of a second turn of a recording tape that has been wound around a hub is 1.3 times a thickness of the recording tape, or less.

Abstract: A release member molding method for mounting a metallic plate in a main body of a release member by insert-molding. The release member is to be provided to be integrally rotatable with a reel accommodated in a case, and to move a locking member from a locking position that locks rotation of the reel to an allowing position that allows rotation of the reel. The metallic plate touches a sliding protrusion portion of the locking member at a touching surface of the release member. The release member molding method includes an arranging step of arranging the metallic plate in a die and a molding step of charging a resin material into the die and molding the main body in which the metallic plate is mounted. The die contacts a portion of the metallic plate that excludes the touching surface, and the die does not contact the touching surface.

Abstract: A metallic plate that is a structure of a release member, the release member being configured to be integrally rotatable with a reel accommodated in a case, and the release member moving a locking member from a locking position, at which the locking member locks rotation of the reel relative to the case, to an allowing position, at which the locking member allows rotation of the reel. The metallic plate comprises a touching surface that is to be touched by a distal end of a sliding protrusion portion that protrudes from the locking member; and a structure such that, if a plurality of the metallic plate are stacked in a plate thickness direction in a state in which the metallic plates are not attached to release members, the touching surface of each metallic plate is not in contact with any other of the metallic plates.

Abstract: A recording tape cartridge includes a release member, a sliding protrusion portion, a metallic plate and a reference portion. The release member is provided in a reel hub to be rotatable integrally with the reel. The release member moves a locking member from a locking position to an allowing position when a pushing surface of the release member is pushed from an outer side of a case. The sliding protrusion portion protrudes from the locking member toward the side thereof at which the release member is disposed. The metallic plate is provided in the release member. A distal end of the sliding protrusion portion touches the metallic plate. The reference portion is provided at the release member. The reference portion positions a position of the metallic plate relative to the pushing surface in the axial direction of the reel.

Abstract: A recording tape cartridge in which an ability to assemble a security tag into a case is excellent is provided. A recording tape cartridge includes: a case that accommodates a reel on which a recording tape is wound; a security tag having a substantially pillar shape, that is provided within the case, and that is adapted to transmit to and receive from an exterior; and a holding portion formed in the case, that holds the security tag by having the security tag fitted with the holding portion.

Abstract: The present invention provides a recording tape cartridge in which an ability to assemble a security tag into a case is excellent. A recording tape cartridge has: a case that accommodates a reel on which a recording tape is wound; a security tag having a substantially pillar shape, that is provided within the case, and that is adapted to transmit to and receive from an exterior; a holding member that is provided within the case, and that holds the security tag at a first end side of the holding member; and a portion to be fit that is formed within the case, and which is held by being fitted with a second end side of the holding member.

Abstract: Disclosed is a recording tape cartridge for which the communications performance of the security tag is not reduced at least when the recording tape cartridge case is stacked on top of other recording tape cartridge cases. The recording tape cartridge (10) comprises a case (12), which houses a reel (20) around which a recording tape (T) is wound and a security tag (110) that can transmit and receive externally, which is located inside the case (12). The security tag (110) is columnar with a coil formed by wire material wound around the outer peripheral surface of a magnetic core. The security tag (110) is disposed within the case (12) in a manner such that security tags (110) within cases (12) of other recording tape cartridges (10) and the axis (P) are not superposed.

Abstract: A recording tape cartridge capable of lessening limitations to the length of a security tag to be installed in a case is obtained. A recording tape cartridge includes a reel on which a magnetic tape T is wound, a case housing the reel between a top plate and a bottom plate that face each other along a reel axial direction, and at the inside of peripheral walls, a reel area rib covering the outer periphery of the reel at least at a corner portion of the case, and a security tag that is disposed in a space with a substantially right-angled triangle shape in plan view surrounded by a front wall, a left side wall and the reel area rib inner wall at the corner portion of the peripheral walls, such that a length direction of the security tag runs along the reel area rib in plan view.

Abstract: In order to allow for a greater degree of freedom in the design of a security tag and to reduce the costs associated with the production of a recording tape cartridge, a recording tape cartridge (10) comprises: a case (12) housing a reel (20) on which is wound a recording tape (T); a columnar security tag (110) that is provided in the case (12) and is capable of transmitting signals to and receiving signals from the outside; a holding member (120) that is provided in the case (12) and has a holder formed in one end thereof in a manner such that the holder and the case (12) hold the security tag (110) from the axial direction of the rail (20) and from a direction orthogonal to the axial direction; and an engagement part (15) that is engaged by an engaging part (124) formed at the other end of the holding member (120) is formed in the case (12).

Abstract: A reel includes a hub formed in a cylindrical-tube-shape with a base portion, 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 a groove wall that is formed integrally with the base portion of the hub and forms a groove portion which is continuous around the entire periphery between the groove wall and an outer peripheral surface of the metal plate.

Abstract: The invention is to provide a packing method for recording tape cartridges and a package of recording tape cartridges, which can prevent tape performance from being affected by humidity change when the recording tape cartridge is carried and can compact a storage case can be provided. In a packing method for recording tape cartridges and a package of recording tape cartridges of the invention, a plurality of recording tape cartridges are stored in a storage case, each of the recording tape cartridges including a case having an upper case and a lower case and accommodating therein a reel on which a recording tape is wound, at least one recording tape cartridge, in which at least one of the upper case and the lower case is formed of a resin material having a humidity controlling effect, is stored in the storage case.

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: A tape reel assembly comprises a reel hub and flanges coaxially secured to, and extending radially outwardly from, opposite axial ends of the reel hub, respectively, each flange being molded by resin injection molding and having a tapered inside surface sloping down at a fixed taper angle from an inside periphery to an outside periphery thereof. The flange is molded by the use of an injection mold having a mold surface which borders at least a part of a mold cavity for configuration of the tapered inside surface of the flange and is convexly curved to the mold cavity.

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 recording tape cartridge in which an ability to assemble a security tag into a case is excellent is provided. A recording tape cartridge includes: a case that accommodates a reel on which a recording tape is wound; a security tag having a substantially pillar shape, that is provided within the case, and that is adapted to transmit to and receive from an exterior; and a holding portion formed in the case, that holds the security tag by having the security tag fitted with the holding portion.