Weight control system

Details Weight control system Weight control system

1976-05-07

1978-12-12

Miller, Jr., George H.

Weighing scales

Weigher responsive material control

Feed

177 1, 177210EM, G01G 1302, G01G 314

Patent

active

041291891

ABSTRACT:
The system controls the weights of individual charges of product or material accumulated by feeding material, preferably at a high "bulk" flow rate and then at a relatively low "dribble" flow rate, into one or more buckets or hoppers. As material is accumulated within each bucket, the system compensates against the effects of vibrational forces and flow rate and, upon termination of material accumulation, it corrects dribble time and final weight by respectively adjusting the bulk and dribble weights for the next charge, all with respect to an electronically established set weight corresponding to the desired weight of each charge. A linear voltage differential transformer (LVDT) senses the position of each bucket and provides electrical signals which are utilized by interface and control circuitry to control charge weight and provide an internal reference. The control system is particularly suited for use in combination with packaging systems.

REFERENCES:
patent: 3175632 (1965-03-01), Rouban
patent: 3477529 (1969-11-01), Burn et al.
patent: 3498395 (1970-03-01), Henry
patent: 3670833 (1972-06-01), Tomohiko et al.
patent: 3837415 (1974-09-01), Connors et al.
patent: 3856097 (1974-12-01), Bartlo et al.
patent: 3938601 (1976-02-01), Hobart
patent: 3968850 (1976-07-01), Gaskill

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