US 12,442,135 B2
Screen cylinder with improved slot width protection and method of removing solid contaminants from a solid suspension
Daniel Parenteau, Blainville (CA); Guy Maurais, Terrebonne (CA); Mark Mouannes, Laval (CA); Peter Joseph Flynn, Loveland, OH (US); Christopher L. Demler, Lebanon, OH (US); and Donald K. Greier, Dayton, OH (US)
Assigned to Kadant Black Clawson LLC, Lebanon, OH (US)
Appl. No. 17/605,063
Filed by KADANT BLACK CLAWSON, LLC, Lebanon, OH (US)
PCT Filed Apr. 23, 2020, PCT No. PCT/US2020/029461
§ 371(c)(1), (2) Date Oct. 20, 2021,
PCT Pub. No. WO2020/219637, PCT Pub. Date Oct. 29, 2020.
Claims priority of provisional application 62/839,314, filed on Apr. 26, 2019.
Prior Publication US 2022/0186438 A1, Jun. 16, 2022
Int. Cl. D21D 5/16 (2006.01)
CPC D21D 5/16 (2013.01) 16 Claims
OG exemplary drawing
 
1. A screen cylinder comprising:
a plurality of profiled bars aligned longitudinally and coupled to at least one support ring at attachment ends of the plurality of profiled bars, each of the plurality of profiled bars comprising:
an outer surface facing away from the at least one support ring;
a first slot surface extending from the outer surface to the attachment end of the profiled bar opposite the outer surface;
a second slot surface opposite the first slot surface and extending from the outer surface to the attachment end of the profiled bar, wherein the first slot surface of one profiled bar and the second slot surface of another immediately adjacent profiled bar define a slot; and
a hardened layer integral with at least a portion of the first slot surface of the profiled bar, the hardened layer having a Vickers hardness value greater than or equal to 500HV0.05, as determined in accordance with ASTM E384-11e1, wherein the hardened layer comprises a surface treated layer of a base metal of the profiled bars.