Dispensing – Resilient wall – With flow controllers or closures
Patent
1987-12-10
1989-10-03
Shaver, Kevin P.
Dispensing
Resilient wall
With flow controllers or closures
2221962, 222215, 222490, 222541, 221 64, 221302, B65D 3700
Patent
active
048710938
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a container consisting of flexible material and having a wall portion which formed with protected slit which is designed to form a dispensing aperture and automatic closure by manipulation of the container, after the first time the container has been opened by the first user of the contents of the container.
Such containers can be used for transport and storing products differing widely in nature, not only solid materials, such as sweets, pills and powder, but also fluid and semi-fluid materials, such as cream or paste. To dispense a major or minor portion of the contents, the container simply manipulated by such pressure on its as will cause the slit to open more or less in a manner enabling easy metering. The container will autmoatically close again on release of the pressure.
BRIEF DESCRIPTION OF THE PRIOR ART
U.S. Pat. No. 2 611 515 discloses a container of the present type, which has a rounded top member in which the slit is provided and which has internal reinforcements around the slit. On the exterior of the top member the slit may be coated with a thin layer of lacquer or the like, which seals the slit hermetically until it is subject to an opening pressure the first time which ruptures the lacquer coating. However, there is a considerable risk that the container will inadvertently be subjected to such a pressure during transport and storage before reaching the first user, or that the lacquer coating will be removed or damaged by chemical or thermal action.
SUMMARY OF THE INVENTION
The principal object of the present invention is to provide a new and inexpensive container, employing the principle of action disclosed in U.S. Pat. No. 2 611 515, and which is effectively protected against inadvertent opening during transport and storage and which makes it possible to ascertain with certainty whether it has been opened before.
Another object of the invention is to provide a container with a dispenser-unit which is protected from touching and dirt after filling and sealing, and against damage during transport and storage until the first opening, without addition of material to the exterior side of the container.
Another object of the invention is to make it possible to produce some of such containers during filling and sealing.
Those objects are achieved in that the wall portion, which in addition to the flexible-material of the container, also comprises of a flexible dispensing-sheet which is formed with the slit and which is a part of the dispenser-unit which is attached to the inner of the body of the container which is comprising of the flexible-material. Thus, the first user of the contents of such container has to break somehow the flexible material of the wall portion to gain access to the clean and protected dispenser-unit which is a part of the inner side of the said wall portion. Such breaking cannot be performed without leaving visual signs of it on the container.
The flexible-material of the body of the container is preferably plastic foil, but may also be of other flexible material, such e.g. paper, cardbord, metal foil, textile and may optionally be of an elastic material, such as e.g. rubber and may of course, be of more then one layer.
The dispenser-unit of the container comprises of at least one dispensing-sheet of comprising at least one sheet of elastically resilient material which is formed with at least one slit.
As mentioned, the dispenser-sheet, which is not necessarily flat, may also be of more than one part and of more than one layer which are not necessarily of same material and are not necessarily formed with same periphery of slit as the sheet of elastically resilient material.
The first opening of the container is effected, e.g. by mean of a cutting tool or otherwise, or by removing part of the flexible-material of the wall portion which is of the flexible material of the container and which may be marked, within the periphery of the dispenser-unit which is attached to the flexble material of the container and which is formed with the slit. Ano
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Bareket Shlomo
Burshtain Esther
Bollinger David H.
Shaver Kevin P.
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