| 摘要 |
A method in which a film (7) is fed from a roll, and is clamped between plates (21, 22) of a device. Said film (7) is then heated and stretched to form a dished lid (28). Said lid is introduced to an opening of a container (3) and fused to an edge (20) of said container and then is cut off outside said edge (20) of said container (3). A device co-operating with conveyor belt (2) that delivers said containers (3) comprises a sealing head (6) synchronised with a film feeder (5). Said sealing head is mounted on a central vertical servo (8) and comprises a punch (9), a ring-shaped heater (10) and a circumferential cutter (12). Said device is also equipped with plates (21, 22) fixed to servos (25). Said plates (21, 22) have holes (26, 27). |
