Method and apparatus for joining the ply of a reel of paper in depletion with the initial flap of a new reel
AssigneeGambini S.P.A.
InventorsGiovanni Buffa, Fabio Picchi
Life of this patent
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Abstract
The present invention concerns a method for joining the ply of a reel of paper in depletion with the initial flap of a new reel, as well as an apparatus adapted for carrying out such a method. Thanks to the method according to the present invention, and to the apparatus suitable for carrying it out, the joining of the reels takes place without using gluing means, like for example the double-sided tape used in known methods, avoiding the relative drawbacks, the adhesion between the plies of the reels to be joined taking place by electrostatic attraction.
Claims9
A method for joining a ply (10a) of a first reel of paper (10) in depletion with an initial flap of a new reel (20) by achieving the adhesion of overlapping plies of the two reels (10, 20) by an electrostatic attraction, further comprising the steps of:
- during the ejection of said first depleted reel (10), tensioning the ply (10a) thereof using a tensioning group (11);
- arranging an electrostatic element (30) able to accumulate an electrostatic charge and load said electrostatic element (30) with an electrostatic charge;
- arranging the second reel (20) to be unwound and joined to said first reel (10) in depletion;
- overlapping the free flap of said second reel (20) to the upper side of said ply (10a) of said first reel (10) in depletion;
- moving said electrostatic element (30) close to the overlapping plies of said reels being unwound so as to induce a polarization state in said plies which causes said electrostatic attraction;
- unwinding both reels so that said free flap of said second reel (20) and said ply (10a) of said first reel (10) in depletion, overlapping, pass at said electrostatic element (30) electrostatically charged, thus obtaining the joining by said electrostatic attraction of the overlapping plies of the two reels.
Dependencies are inferred from the claim text.