A cartridge that makes it possible to simultaneously set a printing tape and a cartridge in a tape printing device. A cartridge to be installed in a tape printing device includes: a cartridge case; a cartridge-side tape introduction port that introduces a printing tape introduced from a device-side tape introduction port into the cartridge case and a cartridge-side tape ejection port that ejects the printing tape to an outside of the cartridge case toward a device-side tape ejection port in a state in which the cartridge is installed in a cartridge installation part; and a tape retention part that retains the printing tape that is introduced in advance into a tape path between the cartridge-side tape introduction port and the cartridge-side tape ejection port before the cartridge is installed in the cartridge installation part.

Disclosed is a label printer for printing labels wound onto a roll that are applied to a carrier tape or that are linerless endless tape labels, having a housing in which a cartridge compartment is formed; a tape cartridge which at least comprises an unwinding mandrel, in which a label roll can be received, and which can be manually inserted into and removed from the cartridge compartment; and a printhead and a driven print roller, wherein the label tape of the label roll can be led between the printhead and the print roller. A spring device and a movable latching holder, which is preloaded into a latching position by a spring force of the spring device, allows the tape cartridge to be latched into the latching holder against the spring force on the insertion and to be unlatched from the latching holder against the spring force on the removal.

A cassette includes a printing tape roll being rotatable and into which a printing tape as a medium to be printed is wound, and an outer peripheral wall disposed on one side in a first direction relative to the printing tape roll. The first direction is a width direction of the printing tape. The outer peripheral wall includes a first side wall extending in a second direction orthogonal to the first direction, a second side wall extending in a third direction orthogonal to the first direction and intersecting with the second direction, and a recess wall defining a recess extending from the second side wall toward one side in the second direction. The recess extends in the third direction on one side in the second direction further than the second side wall. At least a portion of the recess overlaps the printing tape roll in the first direction.

A cassette includes: a case including a first layer and a second layer and having a head space at the first layer; and a roll disposed at the second layer and into which a medium to be printed is wound about a rotation axis in a winding direction. The medium to be printed includes a to-be-printed layer and a release layer, and is disposed at the case such that the to-be-printed layer is on an inner side thereof and the release layer is on an outer side thereof in the winding direction. The case has a conveyance path for conveying the medium to be printed. The conveyance path is defined such that the medium to be printed is conveyed in the winding direction from the roll to the head space through an opening defined at a boundary between the first layer and the second layer in the case.

A tape cassette that includes a housing having a front wall and a tape feed exit located on the front wall, a tape included at least partially within the housing, and a pressing portion and a first non-pressing portion on the front wall. The pressing portion and the first non-pressing portion are positioned to oppose tape type detecting switches of the label printer when the cassette is in the label printer. The pressing portion is configured to change a state of an opposing one of the tape type detecting switches, and the first non-pressing portion is configured to avoid changing a state of an opposing one of the tape type detecting switches. The first non-pressing portion is a planar area of the front wall extending in a tape width direction from a top surface of the housing to a bottom surface of the housing.

A cartridge reduces a movement amount of a center of gravity of a cartridge accompanied by the progress of the winding of an ink ribbon. The cartridge to be installed in a tape printing device includes a platen roller, a paying-out core on which an ink ribbon is wound, and a winding core that winds up the ink ribbon paid out from the paying-out core. When seen from a rotational axis direction parallel to a rotational axis of the paying-out core and a rotational axis of the winding core, the paying-out core and the winding core are arranged to at least partially overlap an imaginary line that passes through a center of the platen roller and extends in a longitudinal direction of the cartridge.

An opening/closing mechanism for an opening/closing cover includes the opening/closing cover, a cover protrusion, a protrusion engagement lever, an elastic member, and a cover opening section having an operation section, the cover opening section being configured to rotate the opening/closing cover in the closed position to a second position. The cover protrusion includes a second engaging portion configured to be pushed by the protrusion engagement member when the opening/closing cover is in the second position such that the opening/closing cover remains in the second position and includes a third engaging portion configured to be pushed by the protrusion engagement member when the opening/closing cover is in a third position between the second position and the open position such that the opening/closing cover rotates from the third position to the open position.

A medium includes: a heat-sensitive medium and an adhesive medium laminated over the heat-sensitive medium in a thickness direction thereof. The heat-sensitive medium includes a base material and a first heat-sensitive layer configured to produce a first color when heated above a first temperature. The first heat-sensitive layer is positioned between the base material and the adhesive medium in the thickness direction. The adhesive medium includes an adhesive-medium base material and an adhesive layer provided at the adhesive-medium base material. The adhesive medium defines a width greater than a width of the heat-sensitive medium in a width direction thereof crossing the thickness direction.

An information processing device is communicably connected to a tape printing device that performs printing on a tape. The information processing device includes an acquiring section that acquires a remaining tape length that is a length of an unprinted portion of the tape; an accepting section that accepts an operation of editing print data; a unit label length calculating section that calculates a unit label length that is a length per label to be created by printing, on the tape, the print data being edited; a printable sheet number calculating section that calculates, based on the remaining tape length and the unit label length, the number of printable sheets that indicates how many labels with the unit label length can be created using the tape with the remaining tape length; and a sheet number notifying section that notifies a user of the calculated number of printable sheets.

A tape cassette includes a box-like housing, a tape mounted within the housing, a hole and a first indicator portion. The housing includes a top wall having a top surface, a bottom wall having a bottom surface and opposing the top wall, and a front wall having a specified height and being formed along peripheries of the top wall and the bottom wall. The hole is provided in the front wall. The first indicator portion includes at least one first aperture and indicates a first element among a plurality of elements of a type of the tape. The first indicator portion is provided in a portion, spaced from the front wall, of the bottom wall. The hole and the one first aperture is located to intersect a virtual line orthogonal to the front wall when viewing along a vertical direction orthogonal to the top wall and the bottom wall.