EMBOSSING ROLL FOR PRODUCING FIBROUS PRODUCTS WITH A RASTERED EMBOSSING, DEVICE EMPLOYING SUCH EMBOSSING ROLL AND ARRANGING EMBOSSING PROTRUSIONS ON SUCH EMBOSSING ROLL

摘要

An embossing roll (50) for producing fibrous products (10, 20, 30) especially tissue paper products, non-woven products or a hybrid thereof, and preferably hygiene and cleaning products, with an embossing surface (51) is suitable to run against an anvil roll (46), the embossing surface (51) comprises protrusions (53) starting from a base circumferential surface (55) of the embossing roll (50); the embossing protrusions (53) form a pattern with a base surface area of at least 3cm x 3cm; within each pattern there is a high number of embossing protrusions (53) which are sized and/or positioned such as to represent a rastered motive element covering the base surface area; at least some of the embossing protrusions {53} are dimensioned and/or positioned such that consecutive minimum distances between opposed side surfaces of pairs of embossing protrusions arranged in sequence vary gradually. Further the invention relates to a device employing an inventive embossing roll (50) and a method for arranging embossing protrusions on a circumferential surface of an inventive embossing roll.