Tape cassette comprising a substantially rectangular two-part housing

Claim 1

A magnetic tape cassette comprising at least one magnetic tape roll within an essentially right parallelpipedic, two-part housing consisting of a cover part and a bottom part which together have a bottom wall, a top wall, a front wall with apertures for scanning, and side walls and a rear wall, the front wall, the rear wall and the side walls consisting of wall sections which are at right angles to the bottom and top walls and abut one another in a substantially horizontal parting plane of said housing, said wall sections having interlocking connecting means, wherein as connecting means on the side surfaces of at least the wall sections forming the rear wall there are provided a series of teeth on each of the bottom part and the cover part, said teeth being integral with said sections, whereby in the closed housing each tooth on one of said wall sections is engaged in an opposite matching recess on the opposite wall section, said teeth and recesses being in the form of prism-shaped projections which are triangular in cross-section, and matching recesses, the inclined side of the triangle being at an angle to the plane of the tape cassette, and wherein the end faces of both the teeth and the matching recesses are disposed in horizontal planes oppositely spaced from the horizontal parting plane of the housing so that straightthrough communicaton in any of said horizontal planes at the location of said teeth and recesses is avoided.