| 摘要 |
A packaging device (1), particularly for food products or technical materials (2), which comprises a vacuum bell-shaped chamber (3) for packaging, particularly for packaging manually or automatically food products or technical materials (2), which can be inserted, by means of a loading surface that can move transversely, between longitudinally folded parts of a single-folded film (7) from an open side thereof and comprises thermal bonding or heat-sealing means for sealing, and at least one nozzle (18) for producing vacuum and/or for introducing the gas or mix. The nozzle (18) is of the type that can be extended/shortened as the width of the single-folded film (7) varies and is adapted to tighten and/or guide the single-folded film (7) upon a transverse movement thereof. The gas or mix is further injected proximate to the first folded longitudinal side (8) of the single-folded film. |
