Method of and apparatus for weighing doses of powder

Details Method of and apparatus for weighing doses of powder Method of and apparatus for weighing doses of powder

1984-04-06

1986-10-28

Goldberg, E. A.

Weighing scales

Processes

177 50, 177 64, 177116, 177 45, G01G 1900, G01G 1952, G01G 1300, G01G 1302

Patent

active

046193367

ABSTRACT:
Method of and apparatus for dosing powders by weight. To introduce a weight of powder with a predetermined final value P.sub.3 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 t.sub.0 and a theoretical weight conforming to an ideal evolution of such weight of powder as a function of time; at a final predetermined instant t.sub.2 with reference to the initial instant t.sub.0, 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.

REFERENCES:
patent: 3091301 (1963-05-01), Stone
patent: 3219132 (1965-11-01), Nowak, Jr.
patent: 3477529 (1969-11-01), Burn et al.
patent: 3828869 (1974-08-01), Sellers
patent: 4381545 (1983-04-01), Biddle, III et al.

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