Dispensing – Collapsible wall-type container
Reexamination Certificate
1999-10-06
2001-04-03
Bomberg, Kenneth (Department: 3754)
Dispensing
Collapsible wall-type container
C222S107000
Reexamination Certificate
active
06209754
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a pouch having an improved pour opening.
2. Description of Related Art
Japanese Laid-Open Patent No. 7-2260 discloses a pouch having a reinforcement comprising a linear shaping of foil in the region of a pour opening to prevent the pour opening from being choked up when liquid is poured.
The reinforcement, however, is arranged in such a manner that two foils constituting a free standing pouch are provided with two reinforcements which lie in alignment with one another, i.e., symmetrically. Therefore, the pour opening tends to be choked and steady pouring of the contents is often failed.
A conventional self-supporting pouch comprises a bag-like portion formed by adhering films with a pour opening sealed portion located at the upper part of the bag-like portion. When the self-supporting pouch is filled with liquid and allowed to stand, while the outer shape is stably maintained from the middle part immediately under the liquid surface to the bottom part of the bag-like portion due to the liquid pressure of the contents, the outer shape from the middle part to top portion of the bag-like portion tends to give wrinkle or intake, thus exhibiting unsatisfied self-supporting property.
In addition, when holding the self-supporting pouch to pour the contained liquid from its pour opening, the bag-like portion tends to bend and deform at the connected portion between the side sealed portion and the pour opening sealed portion thereby impairing the holding property.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a pouch which is easy to process for shaping a pour opening and is capable of pouring the contents towards steady direction without occurring the choke.
Another object of the present invention is to improve the self-supporting property and the pouch-holding property.
The present invention has achieved the above-mentioned object by providing a pouch comprising two side-wall films overlaid with each other with a pour opening, wherein the side-wall films each are provided with a reinforcement, the reinforcements being arranged in an unsymmetrical manner towards pouring direction.
In addition, the present invention has achieved the above-mentioned object by providing the pouch wherein the two side-wall films are adhered to each other to form a bag-like portion, a side portion of the bag-like portion is provided with a side-sealed portion, a pour opening sealed portion is provided with an upper corner connected with the side-sealed portion, the sealed width of the side-sealed portion being enlarged upwardly, and the side-sealed portion and the pour opening sealed portion being continuously connected with a curved line sealed portion.
According to the pouch of the present invention, it is easy to shape the pour opening, and the contents can be steadily poured without choke.
In addition, if the sealed width of a side-sealed portion is enlarged toward the upper direction and the side-sealed portion and the pour opening sealed portion are connected in a continuous manner by a curved sealed portion, the self-supporting property and pouch-holding property can be enhanced.
REFERENCES:
patent: 2723779 (1955-11-01), Parker et al.
patent: 4717046 (1988-01-01), Brogli
patent: 4792060 (1988-12-01), Brogli
patent: 4998646 (1991-03-01), Sherman
patent: 296 22 147 U (1997-04-01), None
patent: 0 630 822 (1994-12-01), None
patent: 2 278 338 (1994-11-01), None
patent: 7-2260 (1995-01-01), None
Bomberg Kenneth
Kao Corporation
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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