Patent ID: 8740175
Filing Date: 2014-06-03
Classification: B67C

Abstract:
1. A method for opening and closing a filling channel at a predetermined timing in a liquid product filling apparatus, comprising: providing a flexible tube in a filling channel between a liquid product storage tank and a discharge orifice of a filling nozzle so as to be part of the filling channel; providing a filling channel opening and closing control unit that includes said flexible tube and a chamber which encloses said flexible tube in a gastight manner; connecting a gas supply and exhaust means to said opening and closing control unit, wherein said gas supply and exhaust means collapses and restores said flexible tube by supplying pressurized gas into said chamber and exhausts the gas from said chamber; exhausting pressurized gas from said chamber when filling of said liquid product is made, thus allowing said flexible tube to restore to open said filling channel, and supplying pressurized gas to said chamber when filling of said liquid product is finished, thus collapsing said flexible tube to close said filling channel, wherein controlling said gas supply and exhaust means to supply and exhaust gas in and out of the chamber at a predetermined timing.