Method of manufacturing a shutter for a disc cartridge.

摘要

A manufacturing method of a shutter (4) for a cartridge which is accommodating therein a recording medium includes the steps of punching out a plate-shaped metal material so as to provide a shutter of a developed shape having a pair of plate-shaped portions (4a,4b) and a coupling portion (4c) for coupling the pair of plate-shaped portions (4a,4b), shaping the punched-out member in such a fashion that the pair of plate-shaped portions (4a,4b) are opposed to each other across the coupling portion (4c) and that a spacing between free end sides of the pair of plate-shaped portions (4a,4b) becomes narrower than a spacing of the pair of plate-shaped portions (4a,4b) at its portion coupled by the coupling portion (4c), and shaping the shaped member such that a spacing between free ends of the pair of plate-shaped portions (4a,4b) of the member shaped by the second process becomes substantially equal to a spacing of the pair of plate-shaped portions (4a,4b) at its portion coupled by the coupling member (4c).