Method of removing air from liquid channel of liquid filling app

Details Method of removing air from liquid channel of liquid filling app Method of removing air from liquid channel of liquid filling app

1999-10-26

2000-12-26

Derakshani, Philippe

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

222504, B67D 540

Patent

active

061645001

ABSTRACT:
For use in a liquid filling apparatus having a liquid channel extending from a liquid tank to a filling nozzle via a metering cylinder, an upper check valve disposed upstream from the metering cylinder and a lower check valve disposed downstream from the cylinder, a method of removing air from the interior of the liquid channel comprises the liquid feeding step of closing the lower check valve, opening the upper check valve and feeding the liquid to be filled from the liquid tank to the liquid channel to an upstream side of the lower check valve; the primary air removing step of closing the upper check valve, opening the lower check valve, and causing the liquid to flow from the upstream side of the lower check valve downstream from the lower check valve while allowing air at a downstream side of the lower check valve to flow in between the valves to replace the liquid at the upstream side of the lower check valve with the air at the downstream side of the lower check valve; and the secondary air removing step of closing the lower check valve, opening the upper check valve, causing the air to flow from between the valves to an upstream side of the upper check valve and discharging the air from the interior of the liquid channel through the liquid tank.

REFERENCES:
patent: 5765729 (1998-06-01), Miller et al.
patent: 5769136 (1998-06-01), Kanematsu et al.

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