Roll Assembly for Finishing a Windable, In Particular Pre-Bonded, Sheet Material, and Corresponding Sheet Material

Abstract

The invention relates to a roll assembly for finishing a windable, in particular pre-bonded, sheet material, comprising a first and a second embossing roll, which form a roll nip therebetween for embossing the sheet material; wherein the first roll comprises a plurality of projections for producing structural elements in the sheet material and the second roll comprises a plurality of indentations for receiving the projections; wherein a roll nip portion formed between the first and the second embossing roll is designed to produce a border of locally bonded sheet material which surrounds the structural element at least in part; wherein the roll nip portion comprises at least one first conical bonding portion and at least one bonding portion formed substantially in parallel with the roll axes.

Dependencies are inferred from the claim text.