| 摘要 |
<p>A reinforcing material (B) consisting of a synthetic resin or aluminum and arranged on the inner circumferential portion of a bag (A) so as to maintain a predetermined shape thereof. The reinforcing material (B) is composed of corner members (1), and straight members (2) connecting the corner members (1) together. When the corner members (1) and straight members (2) are connected together with projections (1a) and bores (2a) engaged with each other, the reinforcing material (B) can be assembled. This invention can also arbitrarily by provide a reinforcing material (B) for a bag (A) of different sizes.</p> |
