Patent ID: 6994286

Claim:
A magnetic tape cartridge comprising: a cartridge case formed of an upper case and a lower case; a single reel rotatably housed within the cartridge case; a magnetic tape wound around the single reel; and a tape extraction opening provided on a side wall of the cartridge case, wherein the cartridge case is integrated by abutment surfaces of the upper case and the lower case which are welded to each other; and vertically extending ribs that extend over the abutment surfaces are provided on the inner surfaces of the side walls of the upper case and the lower case, such that the vertically extending ribs cross over a meeting point of the abutment surfaces, wherein the magnetic tape cartridge is configured such that before the cartridge case is integrated, and the upper case is separated from the lower case, at least one of the vertically extending ribs is fastened to the upper case and extends towards the lower case, and at least another one of the vertically extending ribs is fastened to the lower case and extends towards the upper case.