Container for standard magnetic tape cassette

A container for accommodating a standard magnetic tape cassette which has a longitudinal edge adjoining a pair of opposite broad sides each of which has a broad trapezoidal rib-like boss extending along said longitudinal edge, comprising a housing and a carrier slide in the housing, the housing and slide cooperatively defining an interior chamber having a shape similar to the shape of the cassette to confine the cassette in close fitting relation, spring means urging the slide out of the housing, locking means releasably holding the slide in the housing, the housing and slide cooperatively defining cassette-confining top and bottom walls to confront the broad sides of the cassette and also elongate front and back walls and side walls to substantially entirely close the cassette, the front wall being on the slide to form a closure for the open front of the housing, the slide being movable transversely of the front wall out of and into the housing, one of said top and bottom walls having an elongate opening adjacent to and extending along the front wall to receive the trapezoidal boss of the cassette and to accommodate movement of the cassette with the slide relative to the housing, the slide having side portions located beyond the ends of said opening, and guide means on the side portions of the slide and on adjacent portions of the housing to retain and guide the slide in predetermined orientation in the housing during sliding thereof and without interfering with the trapezoidal bosses of the cassette.