| 摘要 |
The present invention relates to a device for continuous welding of two films, one made of paper and one of plastic used to manufacture sterile packages for the containment of surgical instruments.
The device according to the invention comprises:
- first means (2,5) to preheat a first layer of film of paper material (F1);
- second means (3, 6) to preheat a second layer of film of plastic material (F2);
- a welding unit (4) capable of continuously welding of said first film F1 and of said second film F2 to form at least a tubular element welded at the side edges;
characterized by the fact that the welding unit comprises at least one pair of heated rotating wheels (7) in contact with a motorized heated roller (9) at a point of pressure (PS) and a tensioner capable of keeping these films (F1, F2) overlapped and in contact with the outer surface of the heated wheel for some distance between a point of contact (PT) and the pressure point (PS) to allow the welding of the two films while they are in contact with the outer surface of heated wheels (7). |
