Patent ID: 7621399

Claim:
A cassette comprising: a box-shaped housing for storing a sheet-shaped workpiece therein; a lid mounted on an open end of said housing for opening and closing movement about a junction in which said lid is joined to said housing; and a lid lock mechanism for locking said lid in closing relation to the open end of said housing; and a switching mechanism mounted in said housing for switching between a fixed state in which said sheet shaped workpiece is fixedly disposed in said housing and a released state in which said sheet shaped workpiece is not fixed to said housing; wherein said switching mechanism is actuatable into said released state through the side surface of said housing which extends substantially perpendicularly to the direction in which said sheet shaped workpiece can be removed from said housing and wherein said lid lock mechanism is actuatable to unlock said lid through a side surface of said housing which extends substantially perpendicularly to a direction in which said sheet-shaped workpiece can be removed from said housing.