| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a boxlike bag that uses easily replaceable shells. SOLUTION: Two square frames 10 molded in plastics are interconnected via hinge pins 12 for free opening and closing. Dished shells 11 molded in plastics each have outwardly U-bent edges. The frames 10 are each, on the other, grooved along the edges. When the shells 11 are placed in the frames 10, the shell folds fit in the frame grooves perfectly.</p> |
