Control system and method for dispensing a liquid
AssigneeSpraymation, Inc.
InventorDavid Kerzel
Life of this patent
Estimating the term…
Abstract
In a liquid dispensing system which applies a liquid to a product moving past a liquid dispensing applicator, the improvement comprising dispensing a predetermined quantity of liquid per unit length of liquid dispensed by controlling the liquid operating pressure to coincide with a predetermined liquid pressure and by providing a flow bypass line which permits a continual flow of liquid through a liquid flow pump controlling the liquid operating pressure when the liquid dispensing applicator is not activated.
Claims13
A system for dispensing a liquid onto a product moving along a product conveyor line at a speed which may vary, comprising
- a supply of liquid
- pump means for pressurizing said liquid supply to a liquid operating pressure
- a liquid dispensing applicator
- conduit lines connecting said supply of liquid, said pump means and said applicator
- means for controlling the dispensing of the liquid at a predetermined location on the product and for controlling the dispensing time of the liquid in accordance with the speed of the conveyor line, and
- means for controlling the dispensing of the liquid to dispense a predetermined amount of liquid comprising a controller operable to receive at least two input signals and to send out at least one output signal, said input signals corresponding to the liquid operating pressure and a predetermined liquid operating pressure, said liquid operating pressure corresponding to the amount of liquid being dispensed, said controller being further operable to compare said input signals, determining the difference therebetween, and outputting said output signal in accordance with said difference, and wherein said control means for dispensing a predetermined amount of liquid further comprises means connected to said pump means for receiving said output signal and for adjusting said pump means to adjust said liquid operating pressure to substantially coincide with the predetermined liquid pressure.
In a liquid dispensing system adapted to dispense by pressure, a liquid onto a product moving in accordance with a product conveyor line, said dispensing system including a supply of liquid pump means for pressurizing said liquid to a liquid operating pressure, a liquid dispensing applicator, conduit lines connecting said liquid supply, pump means and applicator, and control means for controlling the dispensing of the liquid in accordance with the speed of the conveyor line for a predetermined time and at a predetermined location on the product, a method for controlling the amount of liquid dispensed comprising the steps of comparing the liquid operating pressure with a predetermined liquid pressure and inputting the difference to a control device which adjusts the liquid operating pressure by adjusting said pump means to substantially coincide with the predetermined liquid pressure, said liquid operating pressure corresponding to the amount of liquid being dispensed.
Dependencies are inferred from the claim text.