Magnetic tape cartridge having abutment reference surfaces

摘要

A magnetic tape cartridge includes a magnetic tape wound around a single reel and a cartridge casing in which the reel is housed for rotation. The cartridge casing is provided on its side surface with a locator portion having an abutment surface which is adapted to abut against a locator member of a recording and reproducing apparatus to locate the magnetic tape cartridge in place with respect to the recording and reproducing apparatus. The abutment surface of the locator portion is provided with a draft angle for facilitating ejection of the cartridge casing from a mold smaller than the draft angle for the other part of the side surface of the cartridge casing.