Ion nitrided creping doctor blade
AssigneeKimberly-Clark Worldwide, Inc.
InventorsPeter King Costello, Clifford Lee Alberts
Life of this patent
Estimating the term…
Abstract
Creping doctor blades useful for making soft tissues are substantially improved by ion nitriding the surface(s) of the doctor blade to produce a hardened surface while retaining the resilient interior of the non-treated blade. The resulting blades have approximately a three-fold increase in blade life.
Claims8
An ion nitrided creping doctor blade having a non-brittle interior with sufficient resiliency to bend under normal creping loads without breaking, said doctor blade having a bottom surface, an operating face surface and a top surface, wherein the bottom surface is harder than the non-brittle interior and the bottom surface has a surface hardness of about 55 Rockwell C hardness or greater.
Dependencies are inferred from the claim text.