| 摘要 |
A method for producing a pack ( 1 ) for groups ( 2 ) of rolls of products comprises the following steps: forming of a tube of film ( 3 ) around a frame ( 5 ) forming a channel ( 6 ) for the passage of the product groups ( 2 ); creation of a first seal (S 1 ) on the front edges ( 7 ) of the film ( 3 ); insertion in the channel ( 6 ) of product groups ( 2 ), fed until they are close to the closed front end ( 7 ) of the film ( 3 ); further feeding of the product groups ( 2 ) with simultaneous feeding of the film ( 3 ) and formation of the further portion of the pack ( 1 ) beyond the frame ( 5 ); creation of a second, longitudinal seal (S 2 ) on the overlapping longitudinal edges of the film ( 3 ) simultaneously with the further feed step; creation of a third seal (S 3 ) on the rear edges ( 11 ) of the film ( 3 ) designed to close the pack ( 1 ) at the rear of the product groups ( 2 ) bagged; between the step of insertion of product groups ( 2 ) in the channel ( 6 ) and the further feeding of the product groups ( 2 ), there being a step of feeding the film ( 3 ) wound around the frame ( 5 ), simultaneously with and in the same direction as the feeding of the product groups ( 2 ), designed to allow a fixed distance (D) to be maintained between the closed front end ( 7 ) of the film ( 3 ) and the front end ( 2 a) of the product groups ( 2 ) fed forward.
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