Wear-resistant perforated sheet, especially for filter screens and drums

Perforated sheet or drum produced from such a sheet, employed in screens and presses for the crude paper pulp industry and for the papermaking industry, the holes made in the said sheet being either round holes or elongate slots, the said sheet being furthermore completely planar or provided with ri...

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Bibliographische Detailangaben
1. Verfasser:	MARKKU KARKKAINEN, JOUKO LASSILA, MAUNO SELKOJOKI ET HEIKKI RISTOLAINEN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PAPER-MAKING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRODUCTION OF CELLULOSE SEPARATION SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TEXTILES TRANSPORTING TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKINGMACHINE
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Beschreibung
Zusammenfassung:	Perforated sheet or drum produced from such a sheet, employed in screens and presses for the crude paper pulp industry and for the papermaking industry, the holes made in the said sheet being either round holes or elongate slots, the said sheet being furthermore completely planar or provided with ribs, ridges, projections, grooves or the like and being characterised in that at least a proportion of the filter surfaces of the said sheet 1 is equipped with a hard surface layer provided with a diffusion coating. …… PLAQUE PERFOREE OU TAMBOUR REALISE A PARTIR D'UNE TELLE PLAQUE, UTILISE DANS DES TAMIS ET DES PRESSES POUR L'INDUSTRIE DE LA PATE A PAPIER BRUTE, ET POUR L'INDUSTRIE PAPETIERE, LES TROUS MENAGES DANS LADITE PLAQUE ETANT SOIT DES TROUS RONDS, SOIT DES FENTES ALLONGEES, LADITE PLAQUE ETANT PAR AILLEURS TOTALEMENT PLANE OU MUNIE DE NERVURES, D'ARETES, DE SAILLIES, DE RAINURES OU EQUIVALENT ET ETANT CARACTERISEE EN CE QU'UNE PARTIE AU MOINS DES SURFACES FILTRANTES DE LADITE PLAQUE 1 EST MUNIE D'UNE COUCHE DE SURFACE DURE POURVUE D'UN REVETEMENT DE DIFFUSION.