Abstract: Apparatus for bonding at least two plies of fibrous web, includes: a first roller having an outer periphery, a plurality of embossing protuberances being provided on the outer periphery, such first roller being an embossing roller; and a second roller having an outer periphery and being elastic at least in a radial direction and together with the first roller forming a nip through which the at least two plies are be fed, such second roller being a counter roller or a marrying roller, wherein at least a part of the outer periphery of at least one of the first and the second roller is irregularly rough so that the at least two plies are bonded at discrete locations corresponding to at least some of the embossing protuberances. A multi-ply product including the bonded plies and a corresponding method are also described.

Abstract: Apparatus for bonding at least two plies of a fibrous web, includes: a first roller having an outer periphery, at least one embossing protuberance provided on the outer periphery; and a second roller having an outer periphery and being elastic at least in a radial direction, the second roller including at least an inner layer and an outer layer that is harder than the inner layer, the second roller together with the first roller forming a nip through which the two plies are to be fed, wherein an embossing element is located on top of at least one of the embossing protuberance(s), an embossing area of each embossing element being smaller than an embossing area of the corresponding embossing protuberance(s) so that the two plies are bonded at discrete locations corresponding to the first and second embossing elements. Multi-ply product including the bonded plies and corresponding method are also described.

Abstract: Apparatus for bonding at least two plies of fibrous web, includes: a first roller having an outer periphery, a plurality of embossing protuberances being provided on the outer periphery, such first roller being an embossing roller; and a second roller having an outer periphery and being elastic at least in a radial direction and together with the first roller forming a nip through which the at least two plies are be fed, such second roller being a counter roller or a marrying roller, wherein at least a part of the outer periphery of at least one of the first and the second roller is irregularly rough so that the at least two plies are bonded at discrete locations corresponding to at least some of the embossing protuberances. A multi-ply product including the bonded plies and a corresponding method are also described.

Abstract: Apparatus for bonding at least two plies of a fibrous web, includes: a first roller having an outer periphery, at least one embossing protuberance provided on the outer periphery; and a second roller having an outer periphery and being elastic at least in a radial direction, the second roller including at least an inner layer and an outer layer that is harder than the inner layer, the second roller together with the first roller forming a nip through which the two plies are to be fed, wherein an embossing element is located on top of at least one of the embossing protuberance(s), an embossing area of each embossing element being smaller than an embossing area of the corresponding embossing protuberance(s) so that the two plies are bonded at discrete locations corresponding to the first and second embossing elements. Multi-ply product including the bonded plies and corresponding method are also described.

Abstract: A method of manufacturing a hygiene product, includes the steps of providing at least a first web (1) and a second web (2), pre-treating the first web and/or the second web, embossing the first web with a décor embossing pattern in a first décor embossing zone (38) having a décor embossing roll (34), and laminating together the first web and the second web in a lamination zone (30), the lamination zone being defined between the décor embossing roll and a lamination roll (36), wherein the décor embossing roll and the lamination roll have a generally-equal surface hardness.

Abstract: Apparatus for embossing a multi-ply paper product, includes at least one background embossing unit, for embossing at least one ply of the multi-ply paper product and at least one decoration embossing unit for embossing the at least one ply downstream of the background embossing unit, as seen in the direction of processing, the decoration embossing unit having a decoration embossing roll and a decoration backing roll. The decoration embossing roll of the decoration embossing unit has an engraving depth larger than 1.5 mm. By this arrangement, an increased bulk of the produced multi-ply paper product can be achieved, the decoration embossing having sharp edges, which in turn leads to an improved application of dye, if dyed glue is used for laminating the plies together. To strengthen this fact, it is preferable that the decoration backing roll has a hardness larger than 60 Shore (A).

Abstract: The invention relates to a method and a device for achieving adhesion between layers of tissue paper, according to which a surface structure corresponding to that of sandpaper is pressed into the product along the side of at least one roller when the individual layers are joined in a roll nip. This results in good adhesion between layers with only minor optical impairment of the product surface and without the use of glue or such like.