US 9,809,909 B2
Fiber oxidation oven with multiple independently controllable heating systems
Hans L. Melgaard, North Oaks, MN (US)
Assigned to Illinois Tool Works Inc., Glenview, IL (US)
Filed by Illinois Tool Works Inc., Glenview, IL (US)
Filed on Dec. 28, 2016, as Appl. No. 15/392,257.
Application 15/392,257 is a continuation of application No. 14/257,383, filed on Apr. 21, 2014, granted, now 9,598,795.
Claims priority of provisional application 61/816,376, filed on Apr. 26, 2013.
Prior Publication US 2017/0107646 A1, Apr. 20, 2017
Int. Cl. F27D 7/00 (2006.01); F27D 7/02 (2006.01); F27D 7/04 (2006.01); D02J 13/00 (2006.01); D01F 9/32 (2006.01); F27D 11/00 (2006.01)
CPC D01F 9/322 (2013.01) [D01F 9/324 (2013.01); D01F 9/328 (2013.01); F27D 7/02 (2013.01); F27D 11/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An oven for heating fibers, the oven comprising:
a plurality of walls forming a chamber having an upper portion and a lower portion; and
a supply structure disposed within the chamber between first and second ends of the chamber;
wherein the supply structure is in communication with a first heating system located outside of the chamber and is configured to direct first heated gas from the first heating system into the upper portion of the chamber to heat fibers in the upper portion of the chamber at a first temperature; and
wherein the supply structure is in communication with a second heating system located outside of the chamber and is configured to direct second heated gas from the second heating system into the lower portion of the chamber to heat fibers in the lower portion of the chamber at a second temperature different than the first temperature such that the upper portion and the lower portion of the chamber maintain the different temperatures without a physical barrier between the upper portion and the lower portion of the chamber.