Arthur J Lacroix

US Patent:

62276964, May 8, 2001

Filed:

Mar 31, 1999

Appl. No.:

9/282798

Inventors:

Frank A. Duchnowski - Lawrence MA
Arthur E. LaCroix - Windham NH

Assignee:

J.H. Horne & Sons Company - Lawrence MA

International Classification:

B01F 506

US Classification:

3661741

Abstract:

A radial diffuser having insert rings for providing microturbulence to a paper fluid stock suspension and uniformly discharging the fluid stock via a plurality of tubes around the perimeter of the radial diffuser to a paper forming unit including a headbox. The radial diffuser comprises a cover, a main head body, an inlet feed pipe and a plurality of flexible or rigid circumferential discharge tubes. The main head body comprises either one or a pair of the co-axial ring inserts which form a fixed or variable passage or space in the chamber of the radial diffuser. The co-axial rings enhance fluid stock fiber mixing as the fluid stock flows through the radial diffuser head. The plurality of outlets around a side wall of the radial diffuser have removable housings for varying entrance coefficients to facilitate the pumping of the fluid stock suspension into the radial diffuser. Each of the outlets may be connected to a tube having a dilution line for controlling either manually or automatically the sheet basis weight profits.