Method for fabricating an embossed sheet of cellulose tissue, a product so made and an embossing cylinder
The invention relates to a method for manufacturing a sheet of paper tissue which is embossed by an embossing cylinder of which the surface is fitted at least in part with embossing elements. The elements include a frustoconical base portion and a tip portion. The method is characterized in that the tip segment includes a flat of which the area is less than 75% of the smaller cross-sectional area of the base. Preferably the area of the flat is less than 20% of the base cross-sectional area. The invention furthermore concerns a sheet thusly manufactured and to sheets made of several plies of which at least one is a ply of the invention.
1. A method for manufacturing a sheet of paper tissue including at least a first ply of tissue and a second ply of tissue comprising embossing said first ply of tissue using an embossing cylinder having a surface of which at least a portion has embossing elements that comprise a frustoconical base portion and a tip portion, wherein said tip portion has a curved contour and a flat at a free end of the tip portion, the flat having a surface less than 75% of the smaller cross-sectional area of the base portion, applying adhesive on said flat, and combining therewith said first ply and said second ply.
2. Method as claimed in claim 1 , wherein the flat has a surface less than 20% of the smaller cross-sectional area of the base segment.
3. Method as claimed in claim 1 , wherein the tip portion has a contour between the base portion and the flat which is a convex curve.
4. Method as claimed in claim 3 , wherein said contour is an arc of a circle.
5. Method as claimed in claim 1 , wherein a half-angle at a top of the frustoconical surface of the base portion is between 25° and 35°.
6. Method as claimed in claim 5 , wherein said tip portion has a contour of a semi-circle.
7. Method as claimed in claim 5 , wherein the top of the base portion is tangent to said tip portion.
8. Method as claimed claim 1 , wherein the base portion is circular in cross-section.
9. Method as claimed in claim 1 , wherein the embossing elements are present in a density of between 20 and 100/cm 2 and have a height of between 0.1 and 1.5 mm.
10. Method as claimed in claim 9 , wherein the embossing elements have a height of between 0.1 and 0.6 mm.
11. Method as claimed in claim 1 , wherein the embossing elements are present in a density of between 4 and 20/cm 2 and have a height of between 1 and 2.5 mm.