| 摘要 |
<p>A component part of a packaging system consists of a four-sided frame (1) with an inner rim (3) terminating in an inwards-directed flange (4). The bevelled interface (6) between each flange has a circular cut-out (7). The rim and flange act as an interface to which a sheet of foil is applied forming a dished detent within the frame.</p> |
