초록 ▼

A resilient vacuum relief valve52is urged tightly on the lid stem44engaging the lid bottom42while encircling the vent46preventing air passage through the vent46. The vacuum relief valve52is also formed of a pliable, resilient thermoplastic such as silicon and is in an inverted hat shape or dish shap

A resilient vacuum relief valve52is urged tightly on the lid stem44engaging the lid bottom42while encircling the vent46preventing air passage through the vent46. The vacuum relief valve52is also formed of a pliable, resilient thermoplastic such as silicon and is in an inverted hat shape or dish shape as shown in FIGS.8and9and includes a circumferential outwardly extending rim54on top that has sufficient resilience to deform when exposed to negative pressure. This arrangement provides an air tight seal when the lid38is inserted into the canister body22and while it remains stationary, however, when the lid38is pulled upwardly, negative pressure within the canister20is created, forcing the valve52to break its seal and relieve the newly created vacuum within the canister20allowing it to be easier to dislodge the lid38and preventing dispersal of powdered contents out of the canister20during lid removal.

대표청구항 ▼

A resilient vacuum relief valve52is urged tightly on the lid stem44engaging the lid bottom42while encircling the vent46preventing air passage through the vent46. The vacuum relief valve52is also formed of a pliable, resilient thermoplastic such as silicon and is in an inverted hat shape or dish shap

A resilient vacuum relief valve52is urged tightly on the lid stem44engaging the lid bottom42while encircling the vent46preventing air passage through the vent46. The vacuum relief valve52is also formed of a pliable, resilient thermoplastic such as silicon and is in an inverted hat shape or dish shape as shown in FIGS.8and9and includes a circumferential outwardly extending rim54on top that has sufficient resilience to deform when exposed to negative pressure. This arrangement provides an air tight seal when the lid38is inserted into the canister body22and while it remains stationary, however, when the lid38is pulled upwardly, negative pressure within the canister20is created, forcing the valve52to break its seal and relieve the newly created vacuum within the canister20allowing it to be easier to dislodge the lid38and preventing dispersal of powdered contents out of the canister20during lid removal.