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US 4,366,872 AGranted
Weighing controlling flow rate with taring between weighings
OwnerDavid Brunnschweiler, Barrie Sedgelyinventors
Life of this patent
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Abstract
A weighpan is controlled by a microprocessor to tare itself between successive weighings and the microprocessor resets the weight at which supply to the weighpan is regulated in accordance with a shortfall or excess delivered on previous weighings.
Claims2
A method for regulating the continuous supply of material, comprising the steps of:
- taring a weighpan;
- loading a first quantity of material in said weighpan;
- comparing the weight of said first quantity with a desired weight and determining the difference;
- discharging said first quantity to a subsequent process requiring a consistent quantity of said material per unit time;
- taring said weighpan;
- determining a second quantity based upon comparing said difference and said desired quantity;
- loading said second quantity of material in said weighpan;
- discharging said second quantity to said process;
- and
- repeating the above steps whereby a consistent quantity of material is delivered to said subsequent process.
7 more elements
A method for regulating the continuous supply of material, comprising the steps of:
- taring a weighpan;
- loading a first quantity of material in said weighpan in a first unit of time;
- comparing the weight said first quantity with a desired weight and determining the difference;
- discharging said first quantity to a subsequent process requiring a consistent quantity of said material per unit time;
- after a second period of time, repeating the above steps while varying said second period of time based upon said difference, whereby a consistent quantity of material over time is delivered to said subsequent process.
2 more elements
Dependencies are inferred from the claim text.