Patent ID: 7291249
Filing Date: 2007-11-06
Classification: D21F

Abstract:
1. An apparatus for the manufacture of a structured fiber web, comprising: an imprinting fabric upon which the fiber web is formed and carried, the fiber web initially having a dry content of less than 35%; a first pressure field device applying a first pressure field to said imprinting fabric and said fiber web, thereby pressing said fiber web onto said imprinting fabric, thereby pre-imprinting said fiber web; a second pressure field device applying a second pressure field to said imprinting fabric and said fiber web, thereby again pressing said fiber web onto said imprinting fabric, drying said fiber web and fixing a three-dimensional surface structure in said fiber web; a drying cylinder to which the fiber web is delivered by said imprinting fabric; and at least three throughflow apparatuses exposing said fiber web to an airflow, each of said at least three throughflow apparatuses having a corresponding throughflow direction, at least one of said throughflow directions being different than an other throughflow direction, said fiber web moving in a machine direction, said at least three throughflow apparatuses arranged in a series in said machine direction; said first pressure field device being a suction element by which said first pressure field is produced, said suction element arranged along a side of said imprinting fabric, said fiber web on an opposite side of said imprinting fabric.