C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
204/208
C25D 7/04 (2006.01) C25D 7/06 (2006.01) C25F 1/02 (2006.01)
Patent
CA 1180683
ABSTRACT OF THE DISCLOSURE A Conductor roll used for masking one face of a metal strip while the other face is being electro-treating comprises an elastomeric-covered cylinder having a metallic contact ring in the center thereof for electrical contact with the strip being treated. To minimize high transfer current densities, each edge of the contact ring has a cantilevered flange overlying a portion of the elastomer. It has been found, due to differential thermal expansion at operating temperature of both the elastomer and the metal contact ring, that the cantilevered flange section of the contact ring is forced up to an excessive extent, resulting in high bending stresses generated in the strip at the region of the contact ring-elastomer interface. By providing a taper on the cantilever flange section to compensate for the difference in thermal expansion, bending stresses in the strip are reduced to insignificant values, whereby eliminating creases and scratches in the strip.
423175
Borden Ladner Gervais Llp
Uss Engineers And Consultants Inc.
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