Weigh feeder system

A weigh feeding apparatus comprising a container for a prefilled substance, means for discharging said substance from said container at a controllable rate;

• means for weighing said container prefilled with said substance;
• means coupled to said weighing means for producing a first electrical signal proportional in amplitude to the weight determined by said weighing means;
• first amplifier means for amplifying said first electrical signal, a first analog-digital converter coupled to said first amplifier means, digital computer means coupled to said first analog-digital converter for computing a first output signal corresponding to the weight of said substance in said container, second amplifier means for amplifying the signal received from said first amplifier means, a second analog-digital converter coupled to said second amplifier means, said digital computer means being coupled to said second analog-digital converter, said couputer means being adapted to compute a corrective signal based on said signal received from said second analog-digital converter, and means coupled between said computer means and said means for discharging said substance from said container for controlling the rate of discharge responsive to said corrective signal.

A weigh feeding apparatus comprising container means, means for discharging a substance from said container means at a controllable rate, means for detecting the weight of the substance being discharged from said container means, means coupled to said detecting means for producing electrical signals proportional to the weight determined by said detecting means, an analog-digital converter for receiving said electrical signals, digital computer means coupled to said analog-digital converter for computing a corrective signal based on the signals received, means coupled between said computer means and said means for discharging said substance from said container for controlling the rate of discharge responsive to the corrective signal, means for inputting into said computer means a preselected feed rate, said computer means being adapted to store a series of the signals received from said analog-digital converter for a time cycle of operation and computing said corrective signal by comparing said signals received with said preselected feed rate, said computer means being adapted to maintain said corrective signal constant during the time when a preselected number of said signals received from said analog-digital converter exceeds preselected upper or lower limits, during one time cycle of operation.

A weigh feeding apparatus comprising a container for prefilling with a substance, means for discharging said substance from said container at a controllable rate, means for weighing said container prefilled with said substance, means coupled to said weighing means for producing electrical signals proportional to the weight determined by said weighing means, an analog-digital converter for receiving said electrical signals, digital computer means coupled to said analog-digital converter for computing a corrective signal based on the signals received, means coupled between said computer means and said means for discharging said substance from said container for controlling the rate of discharge responsive to the corrective signal, means for inputting into said computer means a preselected feed rate, said computer means being adapted to store a series of the signals received from said analog-digital converter for a time cycle of operation and computing said corrective signal by comparing said signals received with said preselected feed rate, said computer means being adapted to maintain said corrective signal constant during the time when a preselected number of said signals received from said analog-digital converter exceeds preselected upper or lower limits, during one time cycle of operation.