Patent ID: 8864300

Claim:
A label producing apparatus comprising: an apparatus housing constituting an apparatus outer shell; a cartridge holder arranged on said apparatus housing that detachably mounts thereon a tape cartridge that includes a tape roll winding a label producing tape inside a cartridge housing; an optical detecting device that optically detects a plurality of detection mark formed at a predetermined interval along a peripheral direction of a detected body from outside of said cartridge housing, the detected body being provided inside the cartridge housing of said tape cartridge mounted to said cartridge holder so as to rotate at a same angular velocity as said tape roll; a tape length calculator that calculates a tape length that is wound and remaining in said tape roll based on a detection result of said optical detecting device; a residual amount related information output portion that outputs residual amount related information related to said tape length calculated by said tape length calculator to a display device; a cartridge sensor configured to acquire type information of said tape cartridge mounted to said cartridge holder; and a first storage device that stores a residual amount table that indicates a correlation between an angular velocity of said tape roll and the tape length of said tape roll for each type of said tape roll; wherein said tape length calculator calculates the tape length of said tape roll by referring to said correlation corresponding to said type information acquired by said cartridge sensor in said residual amount table, and extracting said tape length corresponding to an angular velocity of said tape roll based on a detection result of said optical detecting device.