Apparatus and process for forming a laid fibrous web

Details Apparatus and process for forming a laid fibrous web Apparatus and process for forming a laid fibrous web

1985-12-10

1987-05-19

Chiesa, Richard L.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Projecting particles in a moving gas stream

19148, 19308, 264118, 264120, 264517, 425 801, 425 831, B27N 304

Patent

active

046666478

ABSTRACT:
Apparatus and process for forming a laid fibrous article includes a foraminous forming surface for depositing thereon of fibers under the influence of a pressure differential imposed on the surface, wherein the improvement comprises the provision of a concavely contoured portion of the forming surface to yield a non-stepwise gradation in basis weight of the laid fibrous article. The concavely contoured surface portion is bounded by walls defining angles of from about 45.degree. to 68.degree., whereby the laid fibrous article is readily removable from the forming surface, which may comprise the cylindrical surface of a rotating drum.

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