| 摘要 |
<p>The sealing device comprises a heat sealant disk (100) with a central opening (110) in which a rotatable shaft (20) is supported. A heating element (120) is positioned at the peripheral surface of the disk, around the rotatable shaft. The disk is resiliently coupled with the shaft so that the disk is rotated. During rotation the heating element of the disk is engaged with the overlapping film layers, which are welded on the load.</p> |
