Patent ID: 8151833

Claim:
A method of measuring the volume of liquid contained within a bottle having a formed finish at the top thereof, the bottle being supported in an inspection station having a vertically displaceable head including a fill tube with a high volume/time liquid supply and a low volume/time liquid supply for selectively delivering liquid into the fill tube and a liquid level sensor extending downwardly through the fill tube, the method comprising: displacing the head to a pre-fill height position with respect to the bottle and delivering a measured volume of liquid into the fill tube from both the high volume/time liquid supply and the low volume/time liquid supply until the level sensor senses liquid at a pre-fill height, whereupon the high volume/time liquid supply and the low volume/time liquid supply are turned off and the head is displaced to an off finish position; displacing the head to a post-fill height position with respect to the bottle and delivering a measured volume of liquid into the fill tube from the low volume/time liquid supply until the level sensor senses liquid at a post-fill height, whereupon the low volume/time liquid supply is turned off; and determining the total volume of liquid delivered from the high volume/time liquid supply and the low volume/time liquid supply through the fill tube into the bottle.