| 摘要 |
<p>A tensioning ring (1) is disclosed, that is adapted to radially compress a cover of an airtightly sealed container for products; such ring (1) has a varying circumference due to a relative sliding of two end edges (1a, 1b), and is equipped with a device (2) equipped with lever (4) and crank (8); the device (2) is adapted to be closed through a closure movement that occurs due to a system of forces applied next to at least two points of the ring (1).</p> |
