| 摘要 |
An apparatus for wrapping groups ( 1 ) of products ( 2 ) with film ( 3 ), comprises: a second surface ( 6 ) for forming the product groups ( 1 ) and wrapping them with a length of film ( 3 ) using suitable means ( 7 ) having a first drive axis (AE 1 ); a unit ( 8 ) for feeding the film ( 3 ) and defining the length of it by cutting, located under and close to a slot ( 9 ) for accessing the second surface ( 6 ), the feed unit ( 8 ) having a second, electric drive axis (AE 2 ) for unwinding the film ( 3 ) in the direction of the second surface ( 6 ); a unit ( 10 ) for pre-unwinding the film ( 3 ) and comprising a roll ( 11 ) of film ( 3 ) located upstream of the feed unit ( 8 ) in a film ( 3 ) unwinding direction (B), a third electric drive axis (AE 3 ) being located and operative on the pre-unwinding unit ( 10 ) to move the film ( 3 ) towards the feed unit ( 8 ) according to the film ( 3 ) requirement or feed speed of the second electric axis (AE 2 ); and a unit ( 12 ) which controls the second and third electric axes (AE 2 , AE 3 ) and which is located and operative between the two electric axes so as to synchronize the control of film ( 3 ) feed.
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