Dispensing – Collapsible wall-type container – Nonmetallic
Patent
1992-06-26
1994-09-20
Shaver, Kevin P.
Dispensing
Collapsible wall-type container
Nonmetallic
222541, B65D 4710
Patent
active
053481917
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention concerns a device for storage and dispensation of measured quantities of a pasty material, as well as the process for manufacture of a device of this kind.
BACKGROUND ART
In the sphere of packaging of measured quantities of materials, in particular unitary measured quantities, conventional practice calls for packaging the liquid or pasty substances in small cushions which can be cut or torn in order to allow access to the liquid or pasty material. Patent No. EP-A-0 178 918 describes a form of tearable packaging for liquid or pasty substance which results from the development of this type of packaging. As regards packaging of individual solid objects, in particular drug packaging, the packaging is conventionally produced using a sheet of formable material comprising compartments in which the objects to be packaged are placed, and the compartments are sealed by attaching the surface of the formable sheet which extends away form the compartments to a sheet of material, which, since it has a lesser resistance than the formable sheet, can be torn by crushing said compartment and exerting pressure on the object contained therein.
DISCLOSURE OF THE INVENTION
The purpose of the present invention is to provide packaging for measured quantities of a pasty material, this packaging being similar, as regards its application, to the conventional packagings described above for individual solid objects.
This goal is achieved by supplying a device for storage and dispensation of measured quantities of a pasty substance, which comprises a volume housing the measured quantity of said substance and means for sealing this volume, which can be opened to allow the ejection of the measured quantity of the material, this device comprising two formable, juxtaposed sheets, one of which incorporates a first deformation extending away from the surface at which the two sheets are joined, existing as a compartment creating the volume which houses the measured quantity of pasty material, device in which the other sheet incorporates a second deformation existing as a channel which forms a duct for the ejection of the measured quantity of pasty substance, this ejection duct, which is open at one of its ends, opening opposite the compartment at its other end, and in which a deformable membrane constituting a seal separates the compartment from the duct, the two sheets ensuring position-retention of the membrane being attached in at least the peripheral area of the compartment.
By virtue of an additional invention feature, the surface at which the two sheets of formable material are joined lies in one plane, and the deformable membrane is a flat membrane lying in this same plane.
By virtue of another special feature of the invention, the deformable membrane is an extensible film which, when subjected to the pressure exerted on the pasty material when the compartment is crushed, can be deformed in order to allow the pasty substance to be engaged in the ejection duct.
According to another special feature of the invention, the flat deformable membrane is a pre-cut film whose weakened area lies in the area of the duct and is designed to be torn when subjected to the pressure exerted on the pasty material when the compartment is crushed, in order to allow the pasty material to enter the ejection duct.
According to a further feature, the two formable sheets and the membrane are attached in at least the peripheral areas of the compartment and of the duct, which correspond, in the two formable sheets, to non-deformed areas.
By virtue of still another invention feature, the deformable membrane, whose edges, taken in the longitudinal direction of the duct, lie in immediate proximity to the peripheral area of the compartment, does not contribute to formation of the seal between the sheets of formable material, and is, in consequence, designed to slide between these sheets when subjected to the pressure exerted on the pasty material when the compartment is crushed, thereby taking on the shape of the duct, sai
REFERENCES:
patent: 2705579 (1955-04-01), Mason
patent: 2956710 (1960-10-01), O'Connor
patent: 3917116 (1975-11-01), Mason
patent: 4493574 (1985-01-01), Redmond et al.
patent: 4611715 (1986-09-01), Redmond
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