Ion nitrided creping doctor blade

Paper making and fiber liberation – Apparatus – Web creping or crinkling type


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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


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