Method and apparatus for measuring out by weight
OwnerAndre Graffininventor
Life of this patent
Estimating the term…
Abstract
The method comprises the following steps: inserting a substance into a receptacle with at least one filling stage of fixed duration during which filling is performed at a servo-controlled flow rate using a servo-control loop including a weighing member, a weighing processor unit, and a flow rate control member; measuring the weight of substance contained in the receptacle after filling; comparing the weight of substance contained in the receptacle with a reference weight; and adjusting the servo-control relationship as a function of a difference between the weight of substance contained in the receptacle and the reference weight. An apparatus is provided to accomplish the above functions.
Claims12
A method for filling a receptacle with a predetermined weight of a substance in at least one filling stage, comprising, for each of said at least one filling stage:
- (1) inserting the substance into a receptacle for a fixed time period;
- (2) measuring the flow rate of the substance into the receptacle at time intervals during said fixed time period;
- (3) determining the difference between the measured flow rate and a predetermined reference flow rate;
- and
- (4) adjusting the flow rate of the substance into the receptacle as a function of said difference.
An apparatus for filling a receptacle with a predetermined weight of a substance in at least one filling stage, comprising:
- (1) insertion means for inserting the substance into a receptacle for a fixed time period during each of said at least one filling stage;
- (2) measuring means for measuring the flow rate of the substance filled into the receptacle at time intervals during said fixed time period;
- (3) processor means for determining the difference between the measured flow rate and a predetermined reference flow rate;
- and
- (4) servo-control means for adjusting the flow rate of the substance into the receptacle as a function of said difference.
A method for filling a receptacle with a predetermined weight of a substance in at least one filling stage, comprising, for each of said at least one filling stage:
- (1) inserting the substance into a receptacle for a fixed time period;
- (2) measuring the flow rate of the substance into the receptacle at time intervals during said fixed time period;
- (3) determining the difference between the measured flow rate and a predetermined reference flow rate for each of said at least one filling stage;
- (4) adjusting the flow rate control member during each of said at least one filling stage as a function of said flow rate difference according to a predetermined flow control relationship;
- (5) measuring after filling the weight of the substance in the receptacle;
- (6) determining the weight difference between the measured weight and said predetermined weight;
- and
- (7) adjusting said reference flow rate for at least one filling stage as a function of said weight difference.
A method for filling a receptacle with a predetermined weight of substance in at least one filling stage comprising:
- (1) inserting the substance from a feed member via a flow rate control member into a receptacle for a fixed time during each of said at least one filling stage;
- (2) measuring the flow rate of the substance into the receptacle at time intervals during said fixed time period;
- (3) determining the difference between the measured flow rate and a predetermined reference flow rate for each of said at least one filling stage;
- (4) adjusting the flow rate control member during each of said at least one filling stage as a function of said flow rate difference according to a predetermined flow control relationship;
- (5) measuring after filling the weight of the substance in the receptacle;
- (6) determining the weight difference between the measured weight and said predetermined weight;
- and
- (7) adjusting said flow control relationship as a function of said weight difference.
Dependencies are inferred from the claim text.