Apparatus for air-layer fibrous webs

Claim 1

In an apparatus for the production of a fibrous webbed product comprising (A) a distributor housing having an inlet and a perforated, bottom wall, (B) a plurality of distributor means within said housing for distributing discrete fibers across said bottom wall, (C) a foraminous forming surface immediately below said bottom wall, (D) a suction box connected with the underside of said foraminous surface and extending substantially along the entire length and width of said permeable bottom-wall and (E) a plurality of rollers positioned under said foraminous surface and within the confines of said suction box, each roller being in substantial contact with said foraminous surface, the improvement which comprises (F) a plurality of damper means positioned within the confines of said suction box each adjacent to one of said plurality of rollers, each of said damper means comprising a blade adapted to contact its adjacent roller and an adjustable bar which functions to modify the space between its roller and its next adjacent member while maintaining the blade in contact with the roller.