Abstract: A tape cartridge comprising two halves each comprised of a rectangular panel with a peripheral flange along three sides and portion of a fourth side to permit the panel adjacent the fourth side where the flange is not present to flex. Access openings in the flange at one of said three sides which lies adjacent the fourth side and said fourth side to provide access to the interior of the cartridge. A curved wall on the inner face of each panel, the walls having openings therein to align with the openings in the flange. Locating means to locate the cartridge halves one relative to the other in an assembling operation and releasable catch means to secure the halves together. The catch means being located at the fourth panel side and the panel side opposite the fourth side and the side which lies adjacent the fourth side but does not have the access opening.

Abstract: A cartridge with an interior chamber to house a spool, the cartridge comprising a first part and a second part, each part including a panel of resilient material so as to be flexible along one panel edge, alignment means to align the first and second parts and align coupling means to releasably couple the first and second parts together, said coupling means comprising engageable complementarily toothed lug and surface means respectively on the cartridge parts and rigid legs on the panel having said lug means with shoulder means on each of said legs to engage the edges of apertures in tongues on the other cartridge part when said flexible panel edges are flexed to take up convex and concave configurations to make the legs convergent in a direction extending away from the panel having the legs and the tongues divergent in a direction extending away from the panel having the tongues, and an opening in one panel to permit driving engagement of driving means with a spool when housed in said chamber.