Patent ID: 6045349
Filing Date: 2000-04-04
Classification: B29C

Abstract:
A rolling apparatus for a plastic film which if provided with at least three rolls disposed along the passage of said plastic film, wherein a plurality of rolling deformation points are formed between adjacent rolls so as to subject said plastic film to stepwise rolling with said rolls, an upstream roll and a downstream roll of said at least three rolls are driving rolls, at least one intermediate roll between said upstream roll and said downstream roll of said at least three rolls comprising at least one follower roll; including driving means for driving said driving rolls, wherein adjacent two of said rolls at one deformation point are rotated in such a manner that the peripheral speed of the roll on one side of the film is larger than the peripheral speed of the roll on the other side of the film, and two other adjacent rolls at the successive deformation point are rotated such that the peripheral speed of the roll on said one side of the film is smaller than the speed of the roll on the other side of the film.