Method of and apparatus for weighing doses of powder
US4619336A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1984 |
| Grant date | Oct 28, 1986 |
| Priority date | — |
| Expiry date | Apr 6, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G13/2937
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.