US 12,011,888 B2
Method and system for producing a reinforcing bar, and resulting reinforcing bar
Alexandre Lallier, Thetford Mines (CA); and Danny St-Cyr, Thetford Mines (CA)
Assigned to Pultrall Inc., Thetford Mines (CA)
Filed by Pultrall Inc., Thetford Mines (CA)
Filed on Mar. 27, 2023, as Appl. No. 18/190,464.
Application 18/190,464 is a continuation of application No. 16/463,485, granted, now 11,613,086, issued on Mar. 28, 2023, previously published as PCT/CA2017/051401, filed on Nov. 23, 2017.
Claims priority of provisional application 62/426,022, filed on Nov. 23, 2016.
Prior Publication US 2023/0294373 A1, Sep. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 70/52 (2006.01); B29C 35/02 (2006.01); B29C 35/08 (2006.01); B29C 35/10 (2006.01); B29C 70/02 (2006.01); B29C 70/64 (2006.01); E04C 5/07 (2006.01)
CPC B29C 70/525 (2013.01) [B29C 35/0277 (2013.01); B29C 35/10 (2013.01); B29C 70/025 (2013.01); B29C 70/521 (2013.01); B29C 70/64 (2013.01); E04C 5/07 (2013.01); B29C 2035/0855 (2013.01); B29C 2035/0861 (2013.01); B29K 2995/0072 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for producing a reinforcement bar by a modified process of pultrusion, the method comprising the steps of:
a) providing a bundle of filaments being impregnated with a curable resin;
b) removing excess curable resin from the bundle of filaments;
c) forming an outer layer of curable resin at a surface of the bundle of filaments, the step of forming the outer layer of curable resin comprising the step of compressing the bundle of filaments in a radial manner, and the step of
exposing the outer layer of curable resin to a source of radiant energy;
d) projecting particles onto the outer layer of curable resin; and
e) allowing a polymerization of the outer layer of curable resin.