Process and apparatus for packaging articles in stretchable plastic film
AssigneePadeco S.A.
InventorMariano Galliano
Life of this patent
Estimating the term…
Abstract
Process for packaging items having irregular shape and size, singly on in groups, in a stretchable film of plastic material, comprising the operations of forming, filling and sealing a bag from the stretchable plastic film such film being maintained under adjustable tension and stretch and subsequently adherent on the items due to the elastic "memory" of the released film. The machine for operating the process continuously comprises essentially two members subjected to a reciprocating motion, provided with means for gripping, stretching, sealing and cutting the plastic film, each of such members being subjected to a motion having a stroke of varying length and independent from the one to the other member.
Claims14
A process for packaging items of any shape in a stretchable plastic film, said plastic film having an extensibility of at least 40%, comprising:
- forming a bag from a web of plastic film;
- by sealing longitudinal edges of the film and transversely sealing a lower end of the film;
- inserting the item into the bag so formed;
- transversely sealing an upper end of the filled bag;
- and severing the bag from the plastic film;
- stretching the plastic film during the forming, inserting and sealing operations.
Apparatus for packaging items of any shape in a stretchable plastic film comprising:
- means for forming a web of the film into a bag by sealing longitudinal edges of the film and transversely sealing a lower end of the film;
- means for stretching said film while said film is being formed into a bag;
- two moving members and means to reciprocate said members which members are provided with means for gripping, advancing, sealing and cutting the film and for stretching the film during said gripping, advancing and sealing.
Dependencies are inferred from the claim text.