Longitudinal sealing device for plastic bags has two sealing jaws, each of which has ribs with semicircular cross-section on its inner surface, ribs which are nearer bag being closer to surfaces to be sealed than those further from it

摘要

The longitudinal sealing device for plastic bags has two sealing jaws, each of which has ribs (29, 30) with a semicircular cross-section on its inner surface. The ribs (29) which are nearer the bag are closer to the surfaces (5, 6) to be sealed than those further from it.