Dispensing – Collapsible wall-type container – With wall-collapsing means
Patent
1995-12-18
1998-05-05
Shaver, Kevin P.
Dispensing
Collapsible wall-type container
With wall-collapsing means
222105, 2223219, 222382, 2224642, B65D 7706, B65D 8300
Patent
active
057463506
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates generally to a pump device for a container and, more particularly, to a pump device for a container which is capable of pouring substantially the whole quantity of contents to the very last content.
BACKGROUND OF THE INVENTION
FIG. 30 illustrates a known container for pouring out contents having a high viscosity or altered upon a contact with the outside air with a fixed quantity.
This container 1 includes a flexible content-filled sealed bag housed in the interior thereof, and a pump 4 is mounted in a mouth cylindrical portion 3. This pump 4 is equipped with an operating portion 5 exposed to the outside of the container 1 and a suction portion 6 inserted into the sealed bag 2. The suction portion 6 taking a pipe-like shape is formed with a suction port 6a opened at a front edge thereof and extends to an area in the vicinity of a bottom of the sealed bag 2.
In this container 1, after the operating portion 5 has been moved downward, this operating portion 5 rises due to a spring back, with the result that the interior of the suction portion 6 is under a negative pressure. Contents 7 in the sealed bag 2 are thereby sucked via the suction port 6a into the pump. When the operating portion 5 is again lowered, the contents sucked into the pump are poured out of a discharge port 5a formed in the operating portion 5. Thus, all the contents 7 in the sealed bag 2 can be poured out by sequentially sucking them.
According to the conventional container, however, though there would be no problem at the beginning of its use, when the contents 7 are reduced, the sealed bag 2 is closely fitted to the suction portion 6. Then, it follows that the suction port 6a of the suction portion 6 is blockaded, and the contents 7 can not be sucked. For this reason, there arises a problem in which the pump can not be completely restored, and the contents 7 are left.
Further, because of the sealed bag 2 being closely fitted to the suction portion 6, the contents 7 existing in an upper area of the sealed bag 2 are hindered from flowing up to the suction port 6a of the suction portion 6, and it follows that the contents 7 stay in the upper area due to a local shrinkage of the bottom of the sealed bag 2 in combination therewith. Thus, it is uneconomical that the contents 7 stay in the upper area of the sealed bag 2.
SUMMARY OF THE INVENTION
It is a primary object of the present invention, which was devised in view of the above problems inherent in the prior art, to provide a pump device for a container that exhibits an excellent productivity and is capable of smoothly surely pouring out contents by preventing a suction port of a sealed bag from being blockaded and, besides, pouring out the whole quantity of contents.
To obviate the problem given above, the present invention adopts the following construction.
More specifically, in a pump device for a container, the pump device has an operating portion exposed to the outside of the container and a suction portion, inserted into the container, for sucking the contents out of a suction port. The pump device for the container further comprises a gap holding rod including a proximal end internally fitted into the suction port of the suction portion and a distal end extending toward an inner bottom portion of the contents-filled sealed bag. Protruded portions and recessed portions extending from the proximal end of the gap holding rod toward the distal end thereof are formed alternately in a circumferential direction on an outer peripheral surface of the gap holding rod.
The gap holding rod is constructed such that at least all outermost side of the outermost-positioned protruded portion outermost sides of each of the protruded portions are in the shape of outwardly-convex circular arcs or straight lines.
In the container (corresponding to an innermost layer in a so-called laminated container) having the contents-filled sealed bag contracting with the internal negative-pressurization when taking out the contents, the interior of the container is
REFERENCES:
patent: 3876115 (1975-04-01), Venus, Jr. et al.
patent: 4286636 (1981-09-01), Credle
patent: 4322020 (1982-03-01), Stone
patent: 5156300 (1992-10-01), Spahni et al.
patent: 5513761 (1996-05-01), Kobayashi et al.
Arai Tsugio
Nishigami Akira
Shaver Kevin P.
Yoshino Kogyosho Co. Ltd.
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