| 摘要 |
<p>The element has side flaps (20) maintained in a raised position by a locking unit (25) and extending along folding lines from a belt (21) delimiting an opening covering a flexible membrane. The belt has, for each side flap, a rigidifying flap (40) extending from an inner edge of the belt and opposite to the nearby side flap. Each flap (40) has, in a reversible locking unit (42), a tab traversing a slit of one flap (20) for being extended by projection with respect to the flaps (20) placed in the raised position for constituting a connection unit with a case of a package.</p> |
