| 摘要 |
<p>PURPOSE:To manufacture a case comprosing a bottom frame body and a lid frame body which can be fitted to the bottom frame body efficiently, easily and at a low cost. CONSTITUTION:A sheet of hard synthetic resinous plate is pressed to form integrally a bottom frame body 2 and a lid frame body 3, which are fittable to each other through a connection part 1 of a prescribed width. In this instance, at a border between the respective bodies 2 and 3 and the connection part 1, folds 4 and 4' along which the respective bodies 2 and 3 are bent are formed. A sheet of hard core plate 7 having similar folds 6 and 6' for bending abuts on positions corresponding to the folds 4 and 4' of outer surfaces of the bottom frame body 2, connection part 1 and lid frame body 3. Further the outer surface of the hard core plate 7 is covered with a sheet of soft synthetic resinous outer surface sheet 5, and all periphery of the outer surface sheet 5 is welded simultaneously over the outer periphery of the bottom frame body 2, connection part 1 and lid frame body 3.</p> |
