Importance

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Abstract

A welding and die cutting device for an apparatus for automatically forming bags on demand from an elongated web of film is selectively switchable between a first operating mode in which the formed bags are provided with unitary handles and a second operating mode in which the formed bags are fully closed and no handles are formed thereon. A first one of a pair of reciprocatable mobile holders carries a welding counter-plate to which is mounted a horizontal blade for transverse cutting and separation of formed bags from the web. A plurality of substantially vertical blades for longitudinally cutting the web to form handles on a bag being formed are carried on and depend outwardly from a bladeholder that is interposed between the first mobile holder and the counter-plate. The bladeholder is slidably and elastically linked to the first mobile holder for movement therewith and relative thereto. A pivotally rotatable spacer element is selectively pivotable between a first position in which it interposingly maintains a predetermined separation between the bladeholder and first mobile holder to enable handle-forming engagement of the second blades with the film web and a second position enabling substantial abutment of the bladeholder and first mobile holder to thereby prevent handle-forming contact of the second blades with the web.

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First Claim