| 摘要 |
<p>The double packings are obtained with two plates (20, 21) which are connected by central walls, from a single blank by bringing closer reciprocally both plates (20, 21), these plates being spaced one from the other at a starting position and formed from a single flat blank, until the formation of the central walls connected by a common fold is achieved. Then, the other outer walls are obtained by folding. Production, including filling and folding, is carried out either step-by-step with stop at the different working stations or in a continuous mode through appropriate devices. </p> |
