US 12,350,130 B2
Headbox for manufacturing a substrate
Stephen A. Marrano, Oshkosh, WI (US); and Kyle Krautkramer, Kaukauna, WI (US)
Assigned to Kimberly-Clark Worldwide, Inc., Neenah, WI (US)
Filed by KIMBERLY-CLARK WORLDWIDE, INC., Neenah, WI (US)
Filed on Mar. 20, 2024, as Appl. No. 18/610,725.
Application 18/610,725 is a continuation of application No. 17/928,297, granted, now 11,963,851, previously published as PCT/US2021/034722, filed on May 28, 2021.
Claims priority of provisional application 63/031,803, filed on May 29, 2020.
Prior Publication US 2024/0225911 A1, Jul. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 13/15 (2006.01); D21F 1/02 (2006.01)
CPC A61F 13/15 (2013.01) [D21F 1/02 (2013.01); A61F 13/15642 (2013.01); A61F 13/15699 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A headbox including a machine direction and a cross direction, the headbox comprising at least one flow section, the at least one flow section comprising:
an inlet;
an outlet;
a bottom surface;
a top surface, the top surface being opposite from the bottom surface;
a first side; and
a second side, the second side being opposite from the first side and spaced apart from the first side in the cross direction;
wherein the first side and the second side each comprise:
a first portion being convex to an interior of the at least one flow section;
a second portion being concave to the interior of the at least one flow section, wherein the first portion is closer to the inlet than is the second portion; and
wherein a width of the at least one flow section at the inlet is less than a width of the at least one flow section at the outlet; and
wherein the interior further includes a height, the height at the inlet being greater than the height at the outlet.