초록 ▼

In the containing filling device the tank for the liquid to be dispensed into containers has gas somewhat over atmospheric pressure applied to the liquids surface. Each filling station has an outlet leading to the container being filled, a gas valve coupling the tank to the container and a fluid val

In the containing filling device the tank for the liquid to be dispensed into containers has gas somewhat over atmospheric pressure applied to the liquids surface. Each filling station has an outlet leading to the container being filled, a gas valve coupling the tank to the container and a fluid valve coupling the tank to the conveyor. The liquid above the tip of the tube that leads from the gas valve is forced back into the tank by means of gas pressure injected into the outlet after the filling operation is ended. In which case the fluid valve is forced closed and the gas valve is forced open. Because of the forced open gas valve the injection of gas takes place at very low pressure differential, causing neither disturbance of the liquid in the container and in the tank nor blow out of liquid below the level of the tank of the gas return tube.

대표청구항 ▼

A counterpressure container filler having a tank for containing liquid and gas under pressure and a container filling device, said device including, a body having a passageway for conducting liquid from said tank to a container that is to be filled, a gas conducting tubular member for conducting gas

A counterpressure container filler having a tank for containing liquid and gas under pressure and a container filling device, said device including, a body having a passageway for conducting liquid from said tank to a container that is to be filled, a gas conducting tubular member for conducting gas bidirectionally between said tank and container, said member terminating in the container with an opening at the level to which the container should be filled, a fluid valve for controlling the flow of liquid through said passageway from said tank to said container, a gas valve for controlling the flow of gas through said tubular member, a source of gas at a pressure slightly higher than the pressure in said tank and a check valve through which said source is coupled to said passageway, control means operative to keep said gas valve forced open after said container has been filled to said level or above said level independently of pressure conditions in the said tank and container, and means for opening said check valve momentarily for injecting pressurized gas from said source into said passageway and container while said gas valve is still held open for said gas to force any liquid above said level in the container out through said tubular member and into said tank before said gas valve is closed.