PROCEDE ET DISPOSITIF DE DOSAGE PONDERAL D'UNE POUDRE

• Main Author: RICHARD BOYER ET JOEL DIQUET
• Format: Patent
• Language: French
• Published: 19.10.1984
• Subjects: MEASURING; PHYSICS; TESTING; WEIGHING

PROCEDE ET DISPOSITIF DE DOSAGE PONDERAL D'UNE POUDRE.POUR INTRODUIRE UN POIDS DE POUDRE D'UNE VALEUR PREDETERMINEE FINALEP DANS UN RECIPIENT DE PESAGE, ON ASSERVIT LE FONCTIONNEMENT DE MOYENS D'ACHEMINEMENT DE POUDRE VERS CE RECIPIENT A UNE COMPARAISON EN CONTINU ENTRE LE POIDS EFFECTIF DE POUDREII RECU PAR LE RECIPIENT DEPUIS UN INSTANT INITIALT ET UN POIDS THEORIQUE CONFORME A UNE EVOLUTION IDEALEI DE CE POIDS EN FONCTION DU TEMPS; A UN INSTANT FINAL T PREDETERMINE EN REFERENCE A L'INSTANT INITIAL T, LES MOYENS D'ACHEMINEMENT SONT ARRETES ET ON LAISSE S'ECOULER DANS LE RECIPIENT LA POUDRE RESIDUELLE CORRESPONDANT A L'ERREUR DE JETEE.APPLICATION A UN DOSAGE PONDERAL PRECIS DANS UN TEMPS DETERMINE. Method of and apparatus for dosing powders by weight. To introduce a weight of powder with a predetermined final value P3 into a weighing receptacle, the functioning of mechanism for positively feeding the powder to the receptacle is controlled by a continuous comparison between the effective weight of powder received by the receptacle following an initial instant t0 and a theoretical weight conforming to an ideal evolution of such weight of powder as a function of time; at a final predetermined instant t2 with reference to the initial instant t0, the positive feeding mechanism is stopped and the powder remaining is allowed to run into the weighing receptacle in an amount corresponding to the amount of poweder which is lost during its transmission by the feeding mechanism.