| 摘要 |
A pressurized dispensing container includes a stop between piston and container cap to provide a gap through which propellant can be dispensed through an open valve or after the end of the dispensing of the material that is in the zone between piston and cap. This stop can be designed to keep the piston orthogonal. Excess pressurized propellant will be dispensed through the valve in its open state by forcing its way through the clearance between piston and can sidewall, through the gap between piston and cap and out of the open valve. Alternatively, the stop can also cause the piston to skew thereby providing an enhanced passageway around the piston for propellant that then exits through gap and open valve.
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