Paper making and fiber liberation – Apparatus – Web creping or crinkling type
162361, 148212, B31F 112, C23C 824
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.
patent: 4919877 (1990-04-01), Parsons et al.
patent: 4969378 (1990-11-01), Lu et al.
patent: 5102606 (1992-04-01), Ake et al.
patent: 5120596 (1992-06-01), Yamada
Alberts Clifford Lee
Costello Peter King
Croft Gregory E.
Fortuna Jos'e A.
Kimberly--Clark Worldwide, Inc.
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