US 11,807,987 B2
Method for manufacturing a steel Yankee drier and a steel Yankee drier
Francesco Simoncini, San Lorenzo a Vaccoli (IT); Giulia Masia, Fornacette (IT); Gaetano Passanisi, Capannori (IT); Luca Ghelli, Turin (IT); Leonardo Micheli, Bagni di Lucca (IT); Alessandro Piccinocchi, Pisa (IT); Stefano Marenco, Pinerolo (IT); and Jacopo Bibbiani, Pisa (IT)
Assigned to TOSCOTEC S.P.A., Capannori (IT)
Appl. No. 17/422,303
Filed by TOSCOTEC S.P.A., Capannori (IT)
PCT Filed Mar. 23, 2020, PCT No. PCT/IT2020/050071
§ 371(c)(1), (2) Date Jul. 12, 2021,
PCT Pub. No. WO2020/194360, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 102019000004371 (IT), filed on Mar. 26, 2019.
Prior Publication US 2022/0081836 A1, Mar. 17, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. D21F 5/02 (2006.01); D21F 5/18 (2006.01); B21D 51/10 (2006.01)
CPC D21F 5/021 (2013.01) [B21D 51/10 (2013.01); D21F 5/181 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for manufacturing a steel Yankee drier comprising a cylindrical steel mantle to which two end heads are connected, on each of which a corresponding pin is arranged, wherein the cylindrical mantle has an external surface and an internal surface, and wherein the internal surface of the mantle in cooperation with the end heads delimits an internal chamber of the Yankee drier in which steam can be introduced, wherein a surface protective coating is at least partially formed on the internal surface of the mantle by introducing a predetermined amount of a nickel bath in a volume delimited in a radial direction by the internal surface of the mantle, followed by a permanence of the bath in said volume for a predetermined time, the surface protective coating protecting the internal surface of the mantle from corrosive and/or abrasive agents contained in the steam introduced into said chamber.