Multi-fold interfolding machine structure
First Claim
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 V1;
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 V2 less than V1, a speed difference between the first speed V1 and the second speed V2 being imposed for partially overlapping two consecutive sheets according to said sheet portion;
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.
1 Assignment
0 Petitions
Accused Products
Abstract
Interfolding machine of sheet material for making a stack of interfolded sheets (1) equipped with cutting and transferring means, including, for example, a cutting roller 2 that operates the division of the web (10) into sheets (11) of determined length. The cut sheets (11), all having the same length, are carried along the machine up to a transfer roller (3) that transfers them to an “overlap” roller (4). In particular the cutting roller (2) has peripherally a first series of cutting blades (21a)-(21d) arranged at a first angular distance equal to 90° and a second plurality of cutting blades (21′a)-(21′c) arranged at a second angular distance equal to 120°. The length of sheets 11 is therefore achieved by the angular distance existing between the blades (21). In order to adjust the length of the sheets, or cut-off length, one selects the blades on the cutting roller (2) located at an angular distance corresponding to the desired sheet length.
18 Citations
20 Claims
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1. An interfolding machine to obtain an interfolded product starting from a web of paper, comprising:
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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 V1; 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 V2 less than V1, a speed difference between the first speed V1 and the second speed V2 being imposed for partially overlapping two consecutive sheets according to said sheet portion; 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification