Leakage detection method for plastic foil packaging product e.g. toilet rolls - injecting predetermined quantity of air or producing vacuum in bag through puncture, and determining if leakage is present by detecting loss of pressure or vacuum

摘要

The method includes the steps of producing an injection (5) in a sealed plastic foil bag at a predetermined point (5) in a distance to its welded seal-line (1) and to the contained product (4), and injecting a predetermined quantity of air or producing a vacuum in the bag through this puncture. If the built-up pressure or vacuum is maintained in the bag with welded seal line is determined as dense, or if no pressure or vacuum can be determined, the seal-line is determined to be faulty.