Sheet Product Comprising at Least Two Plies Joined by Gluing with Non-Uniform Distribution of the Glue

Abstract

The sheet product, such as paper, wound in a roll, comprises at least two plies (V 1, V 2 ) joined together by gluing, at least one of which is embossed. The product has longitudinal bands or areas ( 1, 3 ) which are characterized by a different quantity of glue, with more glue in proximity to the edges.

1 - 35 . (canceled)  
   
   
       36 . A tissue paper sheet product wound in a roll, comprising at least two plies joined to each other by gluing, wherein at least one ply of said at least two plies is embossed, wherein all plies forming said sheet product have a common width, and wherein longitudinal edge areas of said sheet product are provided with a greater quantity of glue than at least one intermediate area of said sheet product.  
   
   
       37 . The product as claimed in  claim 36 , wherein all the plies of said sheet product are made of tissue paper.  
   
   
       38 . The product as claimed in  claim 36 , wherein said edge areas have a greater percentage of glued surface than said at least one intermediate area.  
   
   
       39 . The product as claimed in  claim 37 , wherein said edge areas have a greater percentage of glued surface than said at least one intermediate area.  
   
   
       40 . The product as claimed in  claim 36 , further comprising transverse perforated tearing lines.  
   
   
       41 . The product as claimed in  claim 37 , further comprising transverse perforated tearing lines.  
   
   
       42 . The product as claimed in  claim 38 , further comprising transverse perforated tearing lines.  
   
   
       43 . The product as claimed in  claim 36 , further comprising two edge areas at a level whereof at least one ply of the at least two plies is embossed and has protuberances facing inward of the product, at least a portion of said protuberances being provided with glue on front surfaces thereof.  
   
   
       44 . The product as claimed in  claim 36 , further comprising at least one supplemental glued area, internal to the edge areas, having a greater quantity of glue than said at least one intermediate area.  
   
   
       45 . The product as claimed in  claim 37 , including at least one supplemental glued area, internal to the edge areas, having a greater quantity of glue than said at least one intermediate area.  
   
   
       46 . The product as claimed in  claim 44 , wherein said supplemental glued area is in an approximate central position between the longitudinal edges; and defined between said supplemental area and said edge areas are two intermediate areas devoid of glue or having a lesser percentage of glued surface than said supplemental area and said edge areas.  
   
   
       47 . The product as claimed in  claim 36 , wherein in said edge areas and, optionally, in said supplemental glued area, at least one of said at least two plies has embossing according to continuous or discontinuous annular embossing lines.  
   
   
       48 . The product as claimed in  claim 36 , wherein in said edge areas and, optionally, in said supplemental glued area at least one of said at least two plies has embossing according to continuous or discontinuous helical embossing lines.  
   
   
       49 . The product as claimed in  claim 48 , wherein said helical embossing lines have an inclination of no more than  300  with respect to the longitudinal edges.  
   
   
       50 . The product as claimed in  claim 36 , wherein in said at least one supplemental glued area at least one of said at least two plies is embossed.  
   
   
       51 . The product as claimed in  claim 36 , wherein reciprocal gluing areas of said at least two plies are provided in said at least one intermediate area.  
   
   
       52 . The product as claimed in  claim 36 , wherein in said at least one intermediate area said at least two plies are devoid of glue.  
   
   
       53 . The product as claimed in  claim 36 , wherein a first ply of said at least two plies is embossed along said longitudinal edge areas and is devoid of embossing at a level of said at least one intermediate area.  
   
   
       54 . The product as claimed in  claim 53 , wherein a second ply of said at least two plies is embossed at a level of said at least one intermediate area and is devoid of embossing at a level of the longitudinal edge areas.  
   
   
       55 . The product as claimed in  claim 53 , wherein a second ply of said at least two plies is embossed at a level of the longitudinal edge areas.  
   
   
       56 . The product as claimed in  claim 53 , wherein a second ply of said at least two plies is entirely devoid of embossing.  
   
   
       57 . The product as claimed in  claim 53 , wherein a second ply of said at least two plies is embossed on an entire surface thereof.  
   
   
       58 . The product as claimed in  claim 36 , including a third ply of said at least two plies disposed inside a first ply and a second ply of said at least two plies.  
   
   
       59 . The product as claimed in  claim 58 , wherein said third ply is devoid of embossing.  
   
   
       60 . The product as claimed in  claim 36 , wherein a first ply of said at least two plies is provided with a first embossing along said edge areas and with a second embossing at a level of said at least one intermediate area, the first embossing having continuous or discontinuous protuberances of a greater height than continuous or discontinuous protuberances of the second embossing.  
   
   
       61 . The product as claimed in  claim 60 , wherein the protuberances of the first embossing have a lesser density than the protuberances of the second embossing.  
   
   
       62 . The product as claimed in  claim 36 , wherein a second ply of said at least two plies is provided with a third embossing along said edge areas, and with a fourth embossing at a level of said at least one intermediate area.  
   
   
       63 . The product as claimed in  claim 62 , wherein said third embossing has continuous or discontinuous protuberances of a greater height than continuous or discontinuous protuberances of the fourth embossing.  
   
   
       64 . The product as claimed in  claim 63 , wherein the protuberances of the third embossing have a lesser density than the protuberances of the fourth embossing.  
   
   
       65 . The product as claimed in  claim 62 , wherein the protuberances of the third embossing are disposed at a level of the protuberances of the first embossing of a first ply of said at least two plies and are formed by a compression of the second ply at a level of the protuberances of the first embossing of the first ply.  
   
   
       66 . The product as claimed in  claim 62 , wherein the third embossing provided on the second ply has continuous or discontinuous protuberances of a lesser height than continuous or discontinuous protuberances of the fourth embossing provided on said second ply.  
   
   
       67 . The product as claimed in  claim 66 , wherein height of the protuberances of the first embossing, the second embossing, the third embossing and the fourth embossing produced on the first ply and on the second ply are dimensioned to provide a substantially uniform thickness of the product over a complete width thereof.  
   
   
       68 . The product as claimed in  claim 60 , wherein the second ply has a third embossing distributed uniformly over an entire surface, of lesser dimensions and greater density than the first embossing with which the first ply is provided, at a level of the edge areas.  
   
   
       69 . The product as claimed in  claim 36 , wherein bands devoid of glue or with a lesser quantity of glue are disposed between said longitudinal edge areas and the external limit of the product.  
   
   
       70 . The product as claimed in  claim 36 , wherein between said at least two plies a bulk material is provided, said bulk material being prevented from escaping by the longitudinal edge areas where a greater amount of glue is provided.  
   
   
       71 . The product according to  claim 70 , wherein said bulk material is a powder and/or fiber and/or granular material.  
   
   
       72 . The product according to  claim 70 , wherein said bulk material includes a super-absorbent material.  
   
   
       73 . The product according to  claim 70 , wherein gluing is provided along said product by embossing or microembossing which includes at least a protrusion having a form of a substantially continuous line or projection.  
   
   
       74 . A sheet product wound in a roll, comprising at least two plies joined to each other by gluing, at least one ply of said at least two plies is embossed, including longitudinally extending areas with quantities of glue per unit of surface differing from area to area, longitudinal areas having a greater quantity of glue alternating with longitudinal areas having a lesser quantity of glue.  
   
   
       75 . A tissue paper sheet product wound in a roll, comprising at least two plies joined to each other by gluing, at least one ply of said at least two plies is embossed, wherein all plies forming said sheet product are made of tissue paper and wherein longitudinal edge areas of said sheet product are provided with a greater quantity of glue than at least an intermediate area of said sheet product.