Patent ID: 7284724

Claim:
A magnetic tape cartridge comprising: a cartridge case, formed by fastening upper and lower cases of synthetic resin together, and having a tape leader opening formed in upper and lower side walls of said upper and said lower cases; a single tape reel having magnetic tape wound thereon and rotatably housed within said cartridge case; and a tape leader pin, firmly attached to a leading end of said magnetic tape, and detachably held in an upright state between said upper and lower cases so that said tape leader pin faces said tape leader opening; wherein said tape leader pin has axially opposite flanges; wherein a length of said tape leader pin is 18.7 mm; wherein the cartridge case has a thickness of 1.38 mm above and below the axially opposite flanges of the tape leader pin and further comprising a U-shaped clip attached to walls near said tape leader opening to fasten said upper and said lower cases together, wherein the U-shaped clip includes a connecting plate portion and a pair of leg portions bent at right angles in the same direction at both ends of the connecting plate portion such that the pair of leg portions, which form the right angles relative to the connecting plate portion, are respectively inserted into the upper and lower sidewalls perpendicular to the tape leader pin detachably held in the upright state.