There is provided a mold for molding a tape reel that is made of a resin and that includes a cylindrical portion, a bottom portion formed on a proximal end side of the cylindrical portion, and a plurality of through holes penetrating the bottom portion and arranged in a peripheral direction of the cylindrical portion, the mold including: a bottom surface that is used to form the bottom portion; a tubular surface that is used to form the cylindrical portion; and a plurality of projecting portions that protrude from the bottom surface and are used to form the plurality of through holes, respectively, in which, in the tubular surface, a first portion corresponding to a portion between the projecting portions adjacent to each other in the peripheral direction, among the plurality of projecting portions, has a shape that bulges toward a radially outer side of the bottom surface than a second portion corresponding to the projecting portion.

There is provided a mold for molding a tape reel that is made of a resin and that includes a cylindrical portion, a bottom portion formed on a proximal end side of the cylindrical portion, and a plurality of through holes penetrating the bottom portion and arranged in a peripheral direction of the cylindrical portion, the mold including: a bottom surface that is used to form the bottom portion; a tubular surface that is used to form the cylindrical portion; and a plurality of projecting portions that protrude from the bottom surface and are used to form the plurality of through holes, respectively, in which, in the tubular surface, a first portion corresponding to a portion between the projecting portions adjacent to each other in the peripheral direction, among the plurality of projecting portions, has a shape that bulges toward a radially outer side of the bottom surface than a second portion corresponding to the projecting portion.

[Object] To provide a method of producing a tape cartridge that includes a reel hub, a tape reel, and a reel hub, which are capable of achieving desired molding quality in single molding.

[Solving Means] A tape cartridge according to an embodiment of the present technology includes: a first flange; a second flange; and a reel hub on which a tape is wound. The reel hub is disposed between the first flange and the second flange. The reel hub includes a cylindrical metal ring and a molded body formed of a synthetic resin. The molded body includes a first resin portion formed on an inner peripheral surface of the metal ring and a second resin portion formed on an outer peripheral surface of the metal ring. The first resin portion includes a plurality of first recessed portions formed at intervals in a circumferential direction of the metal ring.

A package includes a magnetic tape cartridge that has a case with an identifier displayed on a front surface, a storage member that has an opening portion, through which the magnetic tape cartridge is put in and out, and in which the magnetic tape cartridge is stored in a state in which the identifier is readable, and a packaging member that covers at least the opening portion of the storage member.

A package includes a magnetic tape cartridge that has a case with an identifier displayed on a front surface, a storage member that has an opening portion, through which the magnetic tape cartridge is put in and out, and in which the magnetic tape cartridge is stored in a state in which the identifier is readable, and a packaging member that covers at least the opening portion of the storage member.

The magnetic tape cartridge includes a magnetic tape that is accommodated in the magnetic tape cartridge while being wound around a reel hub. A water absorption amount of the magnetic tape measured after the magnetic tape cartridge is stored in a storage environment of a temperature of 32° C. and a relative humidity of 80% for 10 days is 0.30 g or less as a value in terms of a length of the magnetic tape of 1000 m, and the water absorption amount is a value measured in a measurement environment with a temperature of 21° C. and a relative humidity of 50% within 1 hour after the storage.

A cartridge memory is a cartridge memory used in a recording medium cartridge and includes an antenna section that induces an induced voltage by means of electromagnetic induction, a load modulation section including a load whose magnitude is variable, and a control section that measures the induced voltage and controls the load modulation section on the basis of the measured induced voltage.

The magnetic tape cartridge includes a magnetic tape, and a cartridge reel. In the magnetic tape, a minimum winding deviation occurrence load measured after the magnetic tape is rewound around the cartridge reel by applying a tension of 0.40 N in a longitudinal direction of the magnetic tape is 300 N or less.

The magnetic tape cartridge includes a magnetic tape, and a cartridge reel. In the magnetic tape, a minimum winding deviation occurrence load measured after the magnetic tape is rewound around the cartridge reel by applying a tension of 0.40 N in a longitudinal direction of the magnetic tape is 300 N or less.

A tape cartridge according to an embodiment of the present technology includes: a tape reel; a cartridge case; and a reel lock member. The tape reel includes a reel hub having a bottomed cylindrical shape, a tape having been wound on the reel hub. The cartridge case includes a first protruding portion and a plurality of second protruding portions, the first protruding portion protruding toward a center of a bottom portion of the reel hub, the plurality of second protruding portions being arranged around the first protruding portion. The reel lock member is disposed inside the reel hub. The reel lock member includes a first tubular portion and a plurality of second tubular portions, the first tubular portion fitting with the first protruding portion, the plurality of second tubular portions fitting with the plurality of second protruding portions. The reel lock member is movable in a direction of the one axis between a lock position and a lock release position, the reel lock member engaging with the bottom portion of the reel hub at the lock position, engagement between the reel lock member and the bottom portion of the reel hub being released at the lock release position.