US 4,860,804 AGranted

Filled amount control system

AssigneeMitsubishi Jukogyo Kabushiki Kaisha

InventorsShogo Yamaguchi, Hisashi Tazuke

Life of this patent

Estimating the term…

Loading patent…

Abstract

A control system controls an amount of liquid filled into a container such as a bottle, a can or the like to be a predetermined amount in a precise and reliable manner. Liquid to be filled into the container is fed through a filling nozzle approximately up to a level somewhat higher than a predetermined target level. Then surplus liquid exceeding the predetermined target level is controllably ejected through an ejection nozzle piping having one end inserted into the container and opened at the target level. The surplus filled liquid is ejected through the ejection nozzle piping by suction or by pressure. When the ejection of the surplus filled liquid through the ejection nozzle piping begins, the pressure in the ejection nozzle piping changes from an initial valve. The end of ejection of the surplus filled liquid is detected by a pressure sensor disposed in the ejection nozzle piping. When the pressure sensor detects that the pressure in the ejection nozzle piping returns to the original pressure, a controller operates to stop a suction or pressure source.

Claims4

Dependent claims

A control system for regulating the amount of liquid filled into a container to be a predetermined amount and for use with a filling system that can supply to the container an amount of the liquid in excess of said predetermined amount, said control system comprising:

a liquid discharge member adapted to extend into a container to be filled with liquid and having an inlet opening to be positioned within the container at a level whereat liquid filled into the container up to such level corresponds to said predetermined amount;
means for applying to the interior of the container a pressure different than atmospheric pressure, and thereby for causing, upon the liquid being filled into the container above said level, liquid to pass through said inlet opening and said liquid discharge member until the level of liquid in the container reduces to said level;
pressure sensor means, operatively connected to said liquid discharge member, for detecting a first pressure condition therein during passage of liquid therethrough, for detecting a second pressure condition thereof upon stopping of passage of liquid therethrough, and for generating first and second signals representative of said detected first and second pressure conditions, respectively;
and
controller means, operatively connected to said pressure sensor means for receiving said signals therefrom, and operatively connected to said pressure applying means for, upon receipt of said second signal from said pressure sensor means, stopping application of said pressure to the interior of the container.

2 more elements

Dependencies are inferred from the claim text.