Method for making and converting a centerfolded film

Details Method for making and converting a centerfolded film Method for making and converting a centerfolded film

B - Operations, Transporting

31

B

B31B 23/00 (2006.01) B29C 47/06 (2006.01) B29C 53/38 (2006.01) B31B 23/26 (2006.01) B31B 27/00 (2006.01) B31B 27/26 (2006.01) B31B 39/00 (2006.01) B65B 9/10 (2006.01) B65B 53/02 (2006.01) B29C 47/00 (2006.01) B29C 61/02 (2006.01)

Patent

CA 2257762

A method includes the steps of providing a tubing having an inner annular layer comprising a crosslinked polymeric material, and an outer annular layer comprising a non-crosslinked polymeric material, or a material that is crosslinked to a lesser extent than the material of the inner layer; longitudinally slitting the tubing to form a folded film; and reverse centerfolding the folded film to provide a folded film having a lateral slit edge, and a lateral folded edge opposite said lateral slit edge, such that the inner annular layer becomes an outer layer, and the outer annular layer becomes an inner layer. A bag can be made from the reverse centerfolded film , and an article such as food can be packaged in the bag.

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