Patent ID: 8793840
Filing Date: 2014-08-05
Classification: D01G,D04H

Abstract:
1. A method for the dry forming of a fiber layer comprising: a. feeding a multiplicity of fibers or fiber mixtures to a forming head by means of an air flow to produce a fiber stream; b. introducing the fiber stream into a free space of a forming zone, wherein the free space is formed between the forming head and an air permeable laydown belt that runs through the forming zone from an inflow side to an outflow side; c. intercepting the fibers of the fiber stream by the air permeable laydown belt to form a fiber layer on an upper side of the laydown belt, wherein the air on an underside of the laydown belt is suctioned; and, d. conveying the fiber layer from the forming zone, wherein the fibers of the fiber stream within the forming zone run through the free space with routes of differing length, wherein the free space of the forming zone on the inflow side is kept open to the surroundings for guiding the fibers.