Package making – Methods – Forming a cover adjunct or application of a cover adjunct to...
Reexamination Certificate
2000-05-11
2001-04-17
Vo, Peter (Department: 3721)
Package making
Methods
Forming a cover adjunct or application of a cover adjunct to...
C053S455000, C053S133100
Reexamination Certificate
active
06216424
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a self-supporting package particularly for beverages and for drinking the content through a straw, and to a method for producing the same.
2. Description of the Related Art
At present, as beverage containers, mention may be made of cans, glass bottles, blown bottles, paper packs and the like, but they have both merits and demerits in productivity, handleability, saving of resources, refuse disposal, preservation, design and the like. Particularly, the paper packs to which straws are attached, are very popular and are supplied at a low price, while they have demerits that they lack variety in shapes and the content cannot be seen. Recently, soft packaging containers in the form of a bag made of laminated films which have injection-molded spouts and caps have been developed, and these have been provided mainly at the field of foods such as beverage containers of small capacity owing to their excellent functions such as preservation, heat resistance, saving of resources and reclosability. Such soft packaging containers with spouts are disclosed in JP-U-61-137539, JP-U-62-90353, JP-U-63-34070, and JP-U-63-171350.
However, structure of these soft packaging containers with spouts is complicated, because a bag formed of laminated film is combined with an injection-molded spout in order to assure the excellent functions, and naturally they are higher in cost than other containers of the same capacity. Furthermore, in the case of beverage containers of small capacity, mostly the content is drunk up at one time, and hence the functions given thereto are superfluous. Thus, cheaper containers have been desired from the point of price of the products as a whole. Moreover, the soft packaging containers with spouts are not suitable for contents which require sterilization at high temperatures, and containers which are not limited in their contents have been desired.
BRIEF SUMMARY OF THE INVENTION
The object of the present invention is to provide cheap self-supporting packages for drinking the content through a straw which are superior in heat resistance and can be subjected to sterilization at high temperatures.
The present invention relates to a self-supporting bag (
1
) which comprises a front material (
2
) and a back material (
3
) each consisting of a composite film having a seal layer and having flexibility, and a bottom material (
4
) consisting of said composite film and folded in the form of the letter V between the front material (
2
) and the back material (
3
), wherein a straw-thrusting film (
6
) consisting of said composite film is folded in the form of the letter V between the front material (
2
) and the back material (
3
) in inverse direction to the bottom material (
4
) and provided from one side seal to the other side seal of the self-supporting film (
1
), the straw-thrusting film (
6
) being heat-welded to either one of the front material (
2
) and the back material (
3
).
Furthermore, the present invention relates to a self-supporting package comprising said self-supporting bag (
1
) which is charged with a content and closed by sealing, wherein a seal part (
7
) is provided in the upper portion of the bag (
1
), said seal part (
7
) having an unsealed part (
8
) measuring 2 mm or more in longitudinal direction including therein the upper edge of the straw-thrusting film (
6
) and a width in lateral direction within the width of the self-supporting bag (
1
).
Moreover, the present invention relates to a method for producing a self-supporting bag which comprises feeding a front material (
2
) and a back material (
3
) each consisting of a composite film having a seal layer and having flexibility so that the seal layers face each other, feeding a straw-thrusting film (
6
) consisting of said composite film between the front material (
2
) and the back material (
3
) with folding in half so that the seal layer faces outside, heat-welding the straw-thrusting film (
6
) to either one of the front material (
2
) and the back material (
3
) at a narrower than the width of the straw-thrusting film (
6
) folded in half, feeding a bottom material (
4
) consisting of said composite film between the front material (
2
) and the back material (
3
) with folding in half so that the seal layer faces outside, and carrying out bottom sealing and side sealing.
In addition, the present invention relates to a method for producing a self-supporting package which comprises charging said self-supporting bag (
1
) with a content and closing the bag (
1
) by sealing at a seal part (
7
) provided in the upper portion of the bag (
1
), said seal part (
7
) having an unsealed part (
8
) measuring 2 mm or more in longitudinal direction including the upper edge of the straw-thrusting film (
6
) and a width in lateral direction within the width of the self-supporting bag (
1
).
REFERENCES:
patent: 2265075 (1941-12-01), Knuetter
patent: 3337117 (1967-08-01), Lehmacher et al.
patent: 3380646 (1968-04-01), Doyen et al.
patent: 3799914 (1974-03-01), Schmit et al.
patent: 4224367 (1980-09-01), Scholle
patent: 4614074 (1986-09-01), Evers
patent: 4795271 (1989-01-01), Lane, Jr. et al.
patent: 5352043 (1994-10-01), Takagaki et al.
patent: 5425583 (1995-06-01), Wild
patent: 5830545 (1998-11-01), Frisk
patent: 5873656 (1999-02-01), Arkins et al.
patent: 5937617 (1999-08-01), Yeager
patent: 6079184 (2000-06-01), Cassou et al.
patent: 662 613 (1965-08-01), None
patent: 14 36 818 (1969-01-01), None
patent: 3803678 (1989-08-01), None
patent: 0 052 151 (1982-05-01), None
patent: 0541 821 (1993-05-01), None
patent: 61-137539 (1986-08-01), None
patent: 62-90353 (1987-06-01), None
patent: 63-34070 (1988-03-01), None
patent: 63-171350 (1988-11-01), None
patent: WO 98/23498 (1998-06-01), None
Paradiso John
Smith Gambrell & Russell
Sumitomo Bakelite Company Limited
Vo Peter
LandOfFree
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