Apparatus for forming controlled density fibrous pads for diaper

Details Apparatus for forming controlled density fibrous pads for diaper Apparatus for forming controlled density fibrous pads for diaper

1997-10-29

2000-08-08

Calvert, John J.

Textiles: fiber preparation

Assembling

Web forming

19301, 403294, 425 801, D01G 2500

Patent

active

060982497

ABSTRACT:
The present invention provides an improved apparatus for forming a fibrous pad for absorbent products with improved density control. Fibers entrained in a high speed air flow are deposited onto the foraminous surface of a spaced, three-dimensional pad-forming pocket. The fine foraminous pad forming screen is supported on its periphery by two top plates, a coarse forming screen, two subplates and end rails which incorporate a device to hold the pad forming screen.
A gas flow regulating system consisting of precisely placed cross directional fixed and adjustable airflow control louvers controls the air flow direction and reduces spill over and turbulence during the pad formation and especially during the transition of the forming pocket into and out of the air stream as the rotary former shell rotates through the filling position.
Additional control of density and fiber placement is gained through the use of additional gas control innovations including a tapering the pocket ends such that the airflow is streamlined especially during pocket transition through forming sections.

REFERENCES:
patent: 4666647 (1987-05-01), Enloe et al.
patent: 5226991 (1993-07-01), Svaighert
patent: 5245728 (1993-09-01), Rupp et al.
patent: 5665396 (1997-09-01), Ulman
patent: 5866173 (1999-02-01), Reiter et al.

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