Fiber distributor

• US 4,212,607 A
• Filed: 06/23/1978
• Issued: 07/15/1980
• Est. Priority Date: 06/23/1978
• Status: Expired due to Term

• Current Assignee: James River Paper Company, Inc. (KOCH Industries Incorporated)
• Original Assignee: American Can Co (Citigroup Incorporated)
• Inventors: Miller, Fredric N.
• Primary Examiner(s): Arnold, Donald J.
• Assistant Examiner(s): Hall, James R.
• Application Number:
  US05/918,691
• Time in Patent Office: 753 Days
• Field of Search: 425/80, 425/81, 425/82, 425/83.1
• US Class Current: 425/83.1
• CPC Class Codes: B27N 3/14 Distributing or orienting the particles or fibres
• CPC Class Codes: D04H 1/732 by fluid current, e.g. air-lay

Abstract

An improvement in distributors for air-laid fibers wherein one or more impellers within a distributor housing receive fibers from a hammer mill or other source, and impel fibers smaller than a certain size through a first screen extending over the outlet opening of the distributor housing onto a moving forming wire. A partial vacuum is formed beneath the forming wire to hold the fibers thereon and to form a continuous web of fibrous material. The impellers are blades which rotate about a vertical shaft immediately above the first screen. The invention is directed to improvements in the first screen, wherein it is endless and is mounted for movement across the outlet opening of the distributor housing, in the same direction and at the same speed as the forming wire.

Claims

1. An apparatus for forming a uniform web of dry fibers, comprising:

a fiber distributor including a housing having a bottom outlet opening;

driven impellers in said housing adjacent said opening;

means defining a tunnel extending beneath said opening, in air flow communication therewith;

a forming wire disposed beneath said opening, and mounted for unidirectional travel through said tunnel;

means for sealing the ends of said tunnel against air leakage while accommodating the recited travel of said forming wire;

means for producing a vacuum below said forming wire;

a screen mounted for unidirectional travel over said bottom outlet opening and above said tunnel, said last recited travel being in the direction of travel of said forming wire, that portion of the screen traveling over said opening being the sole portion thereof confronting said forming wire; and

means for introducing dry fibers to said distributor housing for discharge from said bottom outlet opening, under the influence of said impellers, through said screen onto said forming wire as said screen and said forming wire travel, respectively, above and through said tunnel.

2. The apparatus of claim 1, wherein said screen and said forming wire travel at substantially the same speed.