Method of packaging products to be preserved under vacuum or atmosphere of suitable gases

摘要

Machine for packaging products under vacuum or inert gas atmosphere, comprising means for wrapping the product with sheet material, generally thermoplastic material, means for longitudinally sealing the material, means for carrying out transverse seals, means for perforating the sheet material and evacuating air from the package and possibly injecting inert gas, and means for carrying out a further transverse seal to insulate the hole.