Aerosol can

Abstract

The invention relates to a spray dispenser having an elastic filling substance reservoir serving as energy storage chamber; an expansion body that is enclosed tightly by the filling substance reservoir in the unfilled condition and at the same time expands the filling substance reservoir against the elastic force thereof; an inlet for the introduction of filling substance during further expansion of the filling substance reservoir into the interstitial area resulting thereby; and an outlet for delivering the filling substance when spraying.

Description

FIELD OF THE INVENTION [0001] The invention relates to a spray dispenser for delivering a substance from a spray nozzle. The substance may be delivered in the form of a fine mist, but also in form of an atomized stream with larger drops. In all cases, such spray dispensers include a filling substance reservoir which receives the filling substance, and also a valve unit that is connected to the filling substance reservoir, with a spray head which in turn is furnished with a spray nozzle. BACKGROUND OF THE INVENTION [0002] There are several possibilities for expelling the filling substance from the filling substance reservoir, and these are realized in various spray dispenser constructions. For example, expulsion of the filling substance by means of a gas propellant is known. This principle is the worst, because the gas propellant is known to be highly harmful to the environment. In particular, because the gas propellant has strong dependency on its temperature, the function of the sp...

AI Technical Summary

Benefits of technology

"The invention is a spray dispenser with a filling substance reservoir that remains elastic for a long time, even when the reservoir is almost empty. This is achieved by using an expansion body that is inserted into the reservoir before the filling substance is introduced. The expansion body expands the reservoir, ensuring that it can still expel the remaining filling substance even when it is almost completely full. The design of the spray dispenser ensures that the quality of the spray is maintained for the lifetime of the dispenser, and it is not dependent on the temperature. The invention provides a solution for creating a spray dispenser that can be used for a long time and still produce a consistent spray."

Problems solved by technology

This principle is the worst, because the gas propellant is known to be highly harmful to the environment.

In particular, because the gas propellant has strong dependency on its temperature, the function of the spray system is only possible within a narrowly defined temperature range.

However, this principle does not meet the requirement of convenience.

This principle has one disadvantage.

This is that the elastic force is constantly weakened over the course of time as the filling substance reservoir becomes progressively emptier.

This means that the spray pressure and thus also the volume of the spray jet expelled through the spray nozzle diminishes over time.

The resulting effort thus changes over the lifetime of a spray dispenser, which is undesirable.

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