Acrison, Inc.

John S Laidlaw

Ronald J Ricciardi, Sr

Stephen D Kahn

An improved system and method for gravimetrically feeding material at a controlled rate. The material to be fed, which can be either a dry solid or a liquid, is maintained in a supply vessel. A probe disposed in the supply vessel detects the level of the material, sending a high level signal to a controller. A scale weighs the material in the supply vessel, sending a weight signal to the controller. The controller then calculates the density of the material in the supply vessel based on the weight and density of the material. The calculated density is used to affect the feed rate to achieve an operator-input set rate. During refill of the supply vessel, the probe detects material at a high level, sending a signal to the controller which, in turn, sends a signal to a refill valve, stopping refill.

Materials feeding system with level sensing probe and method for

The present invention relates to a continuous weighing system and more specifically to a combination of a 'wild-flow' flow of material and a loss-in-weight monitoring system. An uncontrolled flow of material from a wild-flow stream is accurately weighed and discharged by the loss-in-weight system.

Wild-flow loss-in-weight weighing system

The present invention is a loss-in-weight feeding system including an accelerometer for detecting extraneous disturbances impinging on the system and preventing the disturbance from adversely affecting the feed rate. A split-beam weighing assembly senses the weight of the material in the container and produces a first signal to control the feed rate. The accelerometer is mounted on the split beam assembly and produces an acceleration signal. The acceleration signal is compared with a predetermined limit, and if the comparison shows a difference beyond a predetermined size, the action of the first signal is inhibited.

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Pompton Plains, NJ, United States of America

John S Laidlaw