Compact rewinder for forming rolls of wound-up weblike material and associated method

Abstract

A rewinding machine for the production of rolls of wound-up weblike material is described, comprising; a winding-up system ( 7, 9, 11 ); a system ( 27 ) for severing the weblike material (N) which, on completion of the winding-up of each roll (R), severs the weblike material, forming a free final edge and a free initial edge; an adhesive applicator ( 121 ) for applying the adhesive intended to seal the free final edge of the weblike material of each roll before the roll is unloaded from the winding-up system.

1 . A rewinding machine for the production of rolls of wound-up weblike material, comprising: 
 a winding-up system;    a system for severing the weblike material which, on completion of the winding-up of each roll, severs the weblike material, forming a free final edge and a free initial edge;    an adhesive applicator for applying the adhesive intended to seal the free final edge of the weblike material of each roll;    characterized in that said adhesive applicator applies the adhesive to the weblike material upstream of the roll in the completion phase in the winding-up system.    
     
     
         2 . Machine as claimed in  claim 1 , characterized in that said winding-up system comprises a peripheral winding-up cradle.  
     
     
         3 . Machine as claimed in  claim 1  or  2 , characterized in that said adhesive applicator applies the adhesive to the weblike material before said weblike material is severed by the severing system.  
     
     
         4 . Machine as claimed in  claim 2  or  3 , characterized in that said adhesive applicator is disposed upstream of the winding-up cradle.  
     
     
         5 . Machine as claimed in one or more of the preceding claims, characterized in that said adhesive applicator comprises one or more nozzles.  
     
     
         6 . Machine as claimed in one or more of the preceding claims, characterized in that said winding-up cradle comprises at least one winding-up roller onto which the weblike material is passed, and in that said adhesive applicator is disposed, relative to said first winding-up roller, in a manner such as to apply the adhesive to the weblike material which is supported on said winding-up roller and passed around the latter.  
     
     
         7 . Machine as claimed in one or more of the preceding claims, characterized in that it comprises an embossing unit with two embossing cylinders and two associated pressure rollers, said embossing unit being supported by side frames which also support the winding-up cradle.  
     
     
         8 . Machine as claimed in  claim 7 , characterized in that the embossing cylinders are placed one above the other vertically, with a first embossing cylinder placed above the second embossing cylinder, and in that the pressure rollers are positioned with the first above the first embossing cylinder and the second below the second embossing cylinder, offset laterally relative to a plane containing the axes of the two embossing cylinders, the winding-up cradle being situated, relative to said plane, on the side opposite the second pressure roller.  
     
     
         9 . Machine as claimed in  claim 8 , characterized in that it comprises an adhesive dispensing unit associated with the first embossing cylinder, disposed above said second pressure roller.  
     
     
         10 . Machine as claimed in  claim 7 ,  8  or  9 , characterized in that it comprises a laminating roller interacting with one of said embossing cylinders.  
     
     
         11 . Machine as claimed in one or more of the preceding claims, characterized in that it comprises a ply-bonding unit.  
     
     
         12 . Machine as claimed in  claim 11 , characterized in that said ply-bonding unit is positioned above the winding-up cradle.  
     
     
         13 . Machine as claimed in one or more of the preceding claims, characterized in that it comprises a printing unit.  
     
     
         14 . Machine as claimed in one or more of the preceding claims, characterized in that it comprises a means for introducing winding-up cores, on which said rolls are wound up, and in that, on completion of the winding-up of each roll, said adhesive applicator applies the adhesive to said weblike material in two successive areas, in the first area in order to seal the final free edge of each roll and in the second area to anchor the initial free edge to a winding-up core.  
     
     
         15 . A method for the production of rolls of wound-up weblike material, in which, on completion of the winding-up of a roll, the weblike material is severed, creating a final free edge to be wound up onto the completed roll and an initial free edge for the initiation of the winding-up of a subsequent roll, characterized in that, by means of an adhesive applicator, said adhesive is applied to the weblike material upstream of the roll in a completion phase.  
     
     
         16 . Method as claimed in  claim 15 , characterized in that said roll is wound up in a peripheral winding-up system.  
     
     
         17 . Method as claimed in  claim 15  or  16 , characterized in that the adhesive is applied to the weblike material before said weblike material is severed in order to create said initial edge and said final edge.  
     
     
         18 . Method as claimed in one or more of  claims 15  to  17 , characterized in that said adhesive is applied by spraying.  
     
     
         19 . Method as claimed in one or more of  claims 15  to  18 , characterized in that the weblike material is fed to a peripheral winding-up cradle comprising at least one winding-up roller, and in that the adhesive is applied to the weblike material while the latter is being passed around said first embossing cylinder and supported thereby.  
     
     
         20 . Method as claimed in one or more of the preceding claims, characterized in that two areas of adhesive are applied, by means of a single applicator, to the weblike material, a first zone corresponding to the final free edge and a second zone corresponding to the initial free edge, the initial free edge being anchored by said adhesive on a winding-up core to initiate the winding-up of the subsequent roll.  
     
     
         21 . A peripheral rewinding machine comprising a winding-up system and an embossing and laminating unit having a first and a second embossing cylinder with which a first and a second pressure roller interact, characterized in that the embossing cylinders are placed one above the other vertically, with the first embossing cylinder placed above the second embossing cylinder, and in that the pressure rollers are positioned with the first above the first embossing cylinder and the second below the second embossing cylinder, offset laterally relative to a plane containing the axes of the two embossing cylinders, the winding-up system being situated, relative to said plane, on the side opposite the second pressure roller.  
     
     
         22 . Machine as claimed in  claim 21 , characterized in that it comprises an adhesive dispensing unit associated with the first embossing cylinder, disposed above said second pressure roller.