Patent ID: 8123665
Filing Date: 2012-02-28
Classification: B26D,B65H,Y10T

Abstract:
1. An interfolding machine to obtain an interfolded product starting from a web of paper, comprising: a cutting roller arranged to cut a web of paper that is fed to said machine into sheets of determined length; a transfer roller to transfer the sheets of predetermined length along a conveying path; a device to actuate said cutting roller and said transfer roller so that said web of paper and said sheets proceed at a first speed V an overlap roller adapted to pick up said sheets from said conveying path and to overlap them in turn by a predetermined sheet portion; a device to actuate said overlap roller to convey said sheets at a second speed V a plurality of folding rollers for folding consecutive overlapped sheets into panels in order to provide a stack of interfolded sheets; wherein: said cutting roller comprises first and second cutting blades for cutting, respectively, sheets of a first and of a second length; said transfer roller transfers sheets of said first and of said second length; said overlap roller overlaps sheets of said first and said second length; wherein a device is also provided for selecting alternatively: in case of sheets of said first length, said first cutting blade; in case of sheets of said second length, said second cutting blade.