Bottles and jars – Multilayer barrier structure
Patent
1994-02-01
1996-05-07
Shaver, Kevin P.
Bottles and jars
Multilayer barrier structure
222105, 222183, B65D 7706, B65D 8300
Patent
active
055137610
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a laminated bottle comprising at least two layers, and more particularly to a laminated bottle wherein an innermost layer may be freely peeled away from an outermost layer to form an independent inner bag, and a pump device designed for exclusive use for such a laminated bottle.
BACKGROUND TECHNOLOGY
A laminated bottle is known, wherein said bottle comprises at least an outer layer and an inner layer, said outer and inner layers being bonded together integrally over their whole surfaces so that these two layers may not be peeled away.
It has been sometimes experienced that a pressure inside the bottle may be reduced due to the evaporation of contents, such as, for example, an oxygen, long after the filling of the contents, even when the bottle is in a closed condition. Another type bottle is also known, wherein a pump is attached to a mouth portion of the bottle and said pump is actuated to expel the contents. In this type of bottle, the pressure inside the bottle may be reduced as the contents are being emptied by the pump.
In such a case, as shown in FIG. 56, there may arise a problem that the conventional laminated bottle may have its inner layer 1 and its outer layer 2, which is a principal body of the bottle, collapse to give away, and thereby deteriorating the product in its commercial value.
Moreover, said deformation may take place irregularly, and thus the contents may tend to build-up upon irregular portions on the inner layer created by deformation, even if the mouth portion is located to face downwardly, and thereby interfering with a metered and efficient removal of the contents.
It is a technical object of the present invention to prevent the outer shape of the bottle from being deformed, which would otherwise occur due to a reduced pressure inside the bottle.
DISCLOSURE OF THE INVENTION
The laminated bottle in accordance with the present invention has a construction as that to be described hereinbelow.
That is, the present invention provides a laminated bottle, said bottle comprising a bottle mouth portion formed at the upper portion of the body portion and a bottom portion at the lower portion of the body, said bottle being formed from at least two layers, i.e., an outer layer made from synthetic resin and an inner layer made from flexible synthetic resin, wherein the inner layer of said bottle body portion and an outer layer adjacent to the inner layer are formed to be freely peelable, and at least a portion of said inner layer and outer layer are bonded together by means of a bonding band,
wherein said bonding band is provided longitudinally along a the bottle between said bottle mouth portion and the bottle bottom portion,
one or more inner layers being bonded together at a rib on a bottom parting line to be formed in molding the bottle,
one or more outer layers being formed so that they may form a slit through which air may flow between said outer layer and inner layer without allowing outer layers to contact each other, and
a lock portion being provided on at least a portion of the bottom of said bottle for retaining said outer and inner layers integrally.
In the present embodiment, it is only required that the inner layer may be freely peeled away from the outer layer. Consequently, the number of inner and outer layers may be selected arbitrarily, as long as there are two or more layers.
By such a laminated bottle arrangement, any adverse effect may not be imposed upon the shape of the bottle for a longer period after contents are filled, when the volume of content is reduced to lower the internal pressure inside the bottle or when the bottle internal pressure is reduced by emptying the content by a pump. This is because said inner layer is pulled to separate away from said outer layer under a negative pressure, and thus the inner layer may become an independent bag that may shrink and be deformed separate from the outer layer.
Complete removal of the content from the bottle with no residue is desired. However, a satisfactory res
REFERENCES:
patent: 4330066 (1982-05-01), Berliner
patent: 4954376 (1990-09-01), Krishnakumar et al.
patent: 5068136 (1991-11-01), Yoshida et al.
patent: 5242085 (1993-09-01), Richter et al.
Kobayashi Tsutomu
Nishigami Akira
Shaver Kevin P.
Yoshino Kogyosho Co. Ltd.
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