PRESSURIZABLE DISPENSING CONTAINER

Abstract: A pressurized dispensing container consisting of a protective flask having a neck and a lid provided with a discharging pre­ ssure valve, and designed especially for dispensing hair lac­ quer, perfume, shaving cream, liquid soap, tooth paste, dis­ infectants, oils, ketchup and mustard, is provided in its in­ terior with a closed resilient hollow body (7) provided about its periphery with at least one bead (6) serving for sealing the body (7) between the neck (4) of the protective flask (1) and the lid (9) thereof with the filling and discharging pre­ ssure valve.

Description: The invention relates to a pressurized container consisting of a protective flask having a neck and a lid provided with a discharging pressure valve, and designed especially for dispensing hair lacquer, perfume, shaving cream, liquid soap, tooth paste, disinfectants, oils, ketchup and mustard. Such a container is known from US-A-4121737, for exemple. In known pressurized, especially aerosol containers for dispensing various substances, freon is used as discharge filler, the noxious effects of which influencing particularly the protective ozone layer about the earth, are well known. In some cases, especially when atomizing perfumes, there are used pressurized containers provided with a push-button pump to be controlled by a hand finger. Such a manual control, however, which has to be repeatedly applied, does not constitute an equivalent of a container, wherein the continuous discharge of a substance is caused, if necessary, by merely depressing a pressure valve of a pressurized freon-filled container. It is an object of the present invention to eliminate or at least mitigate the drawbacks of prior art as hereinabove referred to and to provide an improved pressurized dispensing container consisting of a protective flask having a neck and a lid provided with a discharging pressure valve, and designed especially for dispensing hair lacquer, perfumes, shaving cream, liquid soap, tooth paste, disinfectants, oils, ketchup and mustard. According to an aspect of the invention, the container receives a closed resilient hollow body provided about its periphery with at least one bead serving for sealing said body between the neck of the protective flask and the lid thereof with the filling and discharging pressure valve. The closed resilient hollow body is preferably made, at one side of the bead, of a thicker elastic material than at the other side thereof, or of a material having at either side of the bead a different coefficient of elasticity. Further it is advantageous when a portion of the closed resilient hollow body is greater at one side of the bead than its portion at the other side thereof. A merit of the present invention resides in that, owing to the protection of environment, it does not consider the use of freon as discharge filling of the container, but on the other hand, it provides, with the same manipulation, for identical effects of the pressurized container, irrespective of the fact whether the substance is dispensed in the form of aerosol, foam, or merely extruded. Apart from this, the absence of explosion danger, when handling the container at elevated temperatures, may also not be disregarded. Another advantage of the invention lies in the use of a double bag in the form of a single closed resilient hollow body, thus enabling the pressurized dispensing container to be easily assembled, and the whole substance volume to be completely extruded thereout. A preferred embodiment of the invention will hereinafter be described with reference to the accompanying schematic drawing in which Fig. 1 shows an empty pressurized dispensing container in a vertical axial section; Fig. 2 is a similar view showing the full container; and Fig. 3 is a similar view showing the closed resilient hollow body removed out of the container. The pressurized dispensing container comprises a protective flask 1 which is made of aluminium or a plastic material and which is provided, for instance in its bottom 2, with a deaerating vent 3 and, in its top part, with a neck 4. The latter is formed, about its inner periphery, as a circular bed 5 which is open in upward direction and which serves for receiving a bead 6 of a closed resilient hollow body 7 whose lower portion 8 in the form of an air bag enters the interior of said protective flask 1. The neck 4 is covered by a lid 9 which, by the peripheral part of its front surface 10, bears on the bead 6 of said hollow body 7 while, if the container is empty, the upper portion 11 of said body 7 bears on the front surface 10 of said lid 9. The lid 9 is secured to the neck 4 of the protective flask in any of conventional ways such as a threaded joint, circumferential saw-tooth depressions and projections, or by pressing in. In the lid 9 there is arranged a usual filling and discharging pressure valve (not shown) which is provided with the respective nozzle 12 of atomizing, foaming, or only extruding type. The closed resilient hollow body 7 can be filled with air of normal atmospheric pressure, or, depending on the consistency of the substance 13 to be dispensed, with superatmospheric pressure air. Depending upon the substance consistency, the body 7 can be made of two types of material having either different thicknesses, or different elasticity coefficients, or can be asymmetric relative to the bead 6. When assembling the pressurized dispensing container, the closed resilient hollow body 7 is inserted by its lower portion 8 ahead into the interior of the protective flask 1, until the bead 6 thereof engages the circular bed 5 in the flask neck 4. By the lid 9 put on the neck 4 the upper portion 11 of the closed resilient hollow body 7 is forced into the neck 4 of the protective flask 1 whereupon the lid 9 is secured, e.g. by screwing on, whereby the bead 6 of the body 7 is firmly clamped. The filling of the assembled pressurized container with the substance 13 to be dispensed, such as hair lacquer, perfume, shaving cream, liquid soap, tooth paste, disinfectants, oil, ketchup or mustard, is effected in a usual way through the filling and discharging pressure valve arranged in the lid 9. When being supplied, the substance 13 expands, due to its overpressure, the upper portion 11 of the hollow body 7 in the direction from the front surface 10 of the lid 9 away, which means in the interior of the lower portion of the body 7, while air in the interior of the body 7 is simultaneously compressed. The increasing volume of the substance 13 to be dispensed causes also the lower portion 8 of the hollow body 7 to be expanded, until said portion 8 finally adheres to the inner wall of the protective flask 1. Air contained in the flask interior is simultaneously expelled during the filling process. After the pressurized container has been supplied with a desired volume of the substance 13 to be dispensed, the filling is stopped. By filling the pressurized container with the substance is used a pressure that provides the energy necessary for extruding said substance; i.e. the energy is accumulated, on the one hand, in the material of the upper and the lower portion 11 and 8, respectively, of the closed resilient hollow body 7, and, on the other hand, in the air compressed in the interior of said body 7. After putting on a suitable nozzle 12, the filling and discharging pressure valve (not shown) is released by depressing said nozzle, and, due to the co-action of all of the energies, the substance 13 to be dispensed is atomized, foamed or merely extruded out of the pressurized container while, as the substance volume decreases, air is sucked in from the ambient atmosphere into the interior of the protective flask 1 through the deaerating vent 3. The pressurized dispensing container constitutes an equivalent of freon-filled containers and, depending upon the kind of elastic material for manufacturing the closed resilient hollow body, it is also capable to be used in the foodstuff industry.

Claims: A pressurisable container comprising a protective flask, the container being provided with a discharging pressure valve (12) and a lid (9), and being provided internally with a sealed pressure unit and a storage chamber for receiving a substance to be dispensed, the pressure unit and the storage chamber having a common wall, the storage chamber being in communication with the valve and arranged such that charging the storage chamber with the substance to be dispensed causes distortion of the pressure unit so as to pressurise the storage chamber characterised in that the pressure unit is in the form of a sealed resilient hollow body (7) defining a gas filled space, the body having an upper resilient portion (11) and a lower resilient portion (8), the upper portion forming said common wall, the sealed resilient hollow body having a periphery with at least one bead (6) serving to seal the body (7) between parts of the protective flask, the hollow body (7) being disposed in the flask such that the closed gas filled space is out of communication with the neck opening, the storage chamber lying above the resilient hollow body, the upper resilient portion (11) being flat or convex in the discharged state, the upper resilient portion (11) expanding towards the lower portion (8) as the substance to be dispensed is charged therein, and the upper portion tending to return towards its original position as the charged substance is discharged thus enabling all the substance charged in the container to be discharged. A pressurisable container according to Claim 1, wherein the lower resilient portion (8) is made of a thicker resilient material than the upper resilient portion (11). A pressurisable dispensing container according to Claim 1 or Claim 2, wherein the upper resilient portion (11) and lower resilient portion (8) have different coefficients of elasticity. A pressurisable dispensing container according to any of Claims 1 to 3, wherein the upper resilient portion (11) is shorter than the lower resilient portion (8).

Inventors: PISTEK VACLAV, PISTEK, VACLAV
Applicants: JEDNOTNE ZEMEDELSKE DRUZSTVO, PISTEK, VACLAV
Application year: 1990
Main classification: B65D83
IPC codes: B65D83