E.i. Dupont De Nemours and Company

Phillip Osborne Staples

Andrew James Giles

Lyles Howard Sowell

Kenneth Stephen Freund

Todd A McCoy

James Stephen Bailey

Leonard Ray Tucker

James M Oathout

Donald F Miller

John M Dakin

Robert E Morgan

Nathan Cory Jetton

A method for changing the position of fibers in a nonwoven web to improve the isotropy of the web by using angled stream of fluid wherein the streams form a substantially coplanar curtain and impinge on the fibers at their leading ends, trailing ends or sides.

Process and apparatus for increasing the isotropy in nonwoven fabrics

The invention is particularly related to the problems of dispersing fiber to obtain a uniform distribution. The invention includes tapered ducts oriented at an appropriate angle relative to the horizontal for redirecting and decreasing the speed of an air stream containing fiber therein such that the fiber precipitates from the air stream and falls gently to form a uniform fiber bed in a bin.

Inlet design for handling bulk textile fiber

A process of feeding carded fiber to an airlay and particularly to combining carding technology with airlay technology. A carding machine portion is arranged to card fiber while a disperser-roll in the airlay portion picks the individualized carded fibers from a tool bed roll and centrifugally doffs them into an air stream. As such, airlays will be able to handle longer fiber lengths which conventional airlay equipment is unable to handle or satisfactorily open up. Further, an improved process for doffing fiber from a airlay machine and particularly centrifugally doffing fiber from a carding machine.

Feeding carded fiber to an airlay

An apparatus for distributing fiber from a carding machine to an airlay wherein the apparatus comprises a system of ducts or conduits for controlling air flow having a curved top wall and a curved bottom wall that define a converging passageway and the distance between the walls is defined by an exponential equation.

Air handling system for an advanced web former

This invention relates to improved aerodynamics in dry fiber web forming machines and particularly to airlays which form high quality webs. The invention includes a disperser roll for feeding fibers into the air stream and a second roll opposite to the disperser roll for balancing the disruptive effects of long stationary walls and rotating members in the air duct. In one alternative arrangement of the invention, the fibers are also fed to the air stream by a second disperser roll opposite the first disperser roll.

Method and apparatus for improving the air flow through an air duct in a

This invention relates to an improved air acceleration nozzle for use in airlay web formers which reduce the creation of large scale vortices and turbulence. The nozzle accelerates the air by reducing the cross sectional area of the conduit. The size of the conduit for the air is reduced in both lateral dimensions, and more preferably, both dimensions are reduced with smoothly curving, low angle peripheral walls.

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Nashville, TN, United States of America

Phillip Osborne Staples