Web forming apparatus and method

Details Web forming apparatus and method Web forming apparatus and method

D - Textiles, Paper

04

H

19/3

D04H 1/72 (2006.01) D01G 25/00 (2006.01) D04H 1/40 (2006.01) D04H 1/70 (2006.01)

Patent

CA 1049731

ABSTRACT OF THE DISCLOSURE Forming apparatus of this invention include a fiberizing roll for separating fibers from a feed mat and entraining them in a gaseous medium, a foraminous forming surface through which the gaseous medium passes and upon which the fibers are condensed to form a fibrous web, and a formation duct between the fiberizing roll and the forming surface for defining a flow path for the gaseous suspension of fibers from the fiberizing roll to the forming surface; the improvement wherein the formation duct in- cludes front and back, substantially planar inner surfaces which may slightly converge in a direction from the fiberizing roll to the forming surface, but preferably diverge at an angle of up to about 4-1/2 degrees when the forming surface is a curved surface of a cylindrical drum, and up to about 1-1/2 degrees when the forming surface is a linear surface of a forming belt; the forma- tion duct being inclined to the forming surface to define an incidence angle with the forming surface in the range of from about 10 degrees to about 30 degrees. The invention also resides in a method of forming a nonwoven web by employing the above- described apparatus.

249921

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