Dispensing – Collapsible wall-type container – With casing or support
Patent
1995-11-06
2000-05-16
Kaufman, Joseph A.
Dispensing
Collapsible wall-type container
With casing or support
222212, 2223865, B65D 3556
Patent
active
060624302
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a discharge device for one or more media, which can be gaseous, liquid, pasty, pulverulent, powder-like, etc. and/or a mixture of such use media to be discharged, as well as to a method for the manufacture and filling of such a device.
2. Description of Related Art
Before or after the first discharge of a use medium from a container space, such as a tank, a pressure or pump space or the like, the space can be temporarily or permanently filled only partly with the use medium, the remaining volumes or volume of the container space being filled with a replacement medium not intended for discharge. This can be a medium which does not react e.g. with the use medium and/or does not physically dissolve in the use medium, so that despite the close juxtaposition the two media are clearly separated from one another, at least in the low-flow, calmed state. However, the replacement medium can contain impurities such as dirt, bacteria, etc., which react with and spoil the use medium for its intended medical, cosmetic or other use. In order to avoid this risk it is possible to add to the use or replacement medium preservatives, stabilizers or similar substances, but these are frequently not desired due to medical side effects, for cost reasons, etc.
SUMMARY OF THE INVENTION
The object of the invention is to provide a discharge device and a method of the indicated type, which avoid the disadvantages of known constructions or of the indicated type and in which in particular undesired contamination of the use medium can be significantly reduced or avoided for as long as the use medium is not discharged, being stored in a manner sealed with respect to the exterior.
For achieving this object at least one compensating and/or reception container receives at least one different replacement medium and the reception space for the replacement medium is substantially closed with respect to one or the particular associated container space at least in one operating state. If the reception container is only partly, or not in contact with the use medium, it can be filled e.g. with a replacement medium free from impurities or can be externally hermetically sealed against the penetration of impurities and, as required, the replacement medium can be delivered to areas of the container space free from the use medium by means of one or more line connections. However, it is particularly appropriate if a reception container is bounded with a container wall or the like directly with respect to the use medium, or the container space areas free from the use medium are partly, largely or virtually completely filled and namely essentially independently thereof, with a variable filling level, or to which percentage the use medium fills the container space. Unlike in the case of a climbing or drag member, etc., no large-surface, tight sliding seats are required, which are difficult if not impossible to seal against the penetration of impurities.
As a result of the inventive construction of the space area taken up in volume-variable manner by the use medium, confinement of the use medium within a volume boundary, referred to herein as bounding, is possible substantially independently of the total volume of the container space approximately to the volume of the filling with the use medium, so that there is always an at least approximate complete filling of said space with only the use medium. In the areas in which the use filling is not adjacent to the container vessel, said use filling is substantially only adjacent to the position-variable container wall of the reception container for the replacement medium, so that as a result of the construction according to the invention, instead of for the said actions said construction may only be suitable for protecting the use filling against shaking movements.
Independently of the described effects and actions, the reception container can also influence the pressure of said use medium filling. The reception container can also
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patent: 4239132 (1980-12-01), Mueller et al.
patent: 4420100 (1983-12-01), Mueller
patent: 4978033 (1990-12-01), Chou
Ing. Erich Pfeiffer GmbH
Kaufman Joseph A.
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