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C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
C21D9/18—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for knives, scythes, scissors, or like hand cutting tools
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FR657492D1927-07-261928-07-13Procédé pour obtenir une dureté, conservant le tranchant, dans des couteaux et ciseaux inoxydables de tout genre
ExpiredFR657492A
(fr)
Procédé permettant le transport et l'application des poils d'animaux, sur tissu et autres supports, et appareils pour l'utilisation de ce procédé
Procédé permettant de faire varier la largeur des bandes de papier ou de matière analogue, notamment de crêper le papier dans le sens longitudinal, et appareil destiné à la mise en oeuvre de ce procédé