JPH0330261Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to sealed containers for sake, youth, milk, etc., and is made by folding a composite sheet made of multiple layers of plastic film, aluminum foil, paper, etc. This invention relates to an improvement in a sealed container in which the lining tape for sealing the spout also serves as reinforcement for the folded portion.

(Prior technology) Conventionally, airtight containers for sake, youth, milk, etc. have been made of composite sheets made of multiple layers of plastic film, aluminum foil, paper, etc., with straw openings,
Provide a spout such as a drinking spout, bend it into a rectangular parallelepiped shape,
Sealed containers are often used.

In order to improve the sealing properties and gas barrier properties of the spout of such containers, Utility Application No. 57 filed by the same applicant was filed.
- Improvement in bonding the backing tape over the pouring spout and the creases where multiple sheets are folded, as seen in the specification (Utility Model Application Publication No. 98119, filed June 29, 1981) (Utility Model Application No. 59-3821). It has been made.

However, in the above invention, the width of the lining tape is {(1/2 of the thickness of the front and back of the container) + (distance from the side of the container to the end of the spout) + (margin)}, which is quite wide. This method requires tape and is therefore not only expensive but also difficult to work with, making it unsuitable for actual implementation.

(Purpose of the invention) The present invention relates to the above-mentioned sealed container by narrowing the width of the lining tape, improving workability, and making it possible to reinforce the folded portion.

(Problems to be Solved by the Invention) In the above-mentioned sealed container, a spout is provided and the folded portion is reinforced to improve manufacturing workability and reduce costs.

(Means for Solving the Problem) In other words, the present invention is a rectangular parallelepiped-shaped hermetically sealed blank made by folding, sealing, and gluing a composite sheet made of paper as a main body and with a heat-sealable resin layer as the innermost layer. In the container, the blanks have upper pieces 10, 60 symmetrically arranged at the center through a fold a, folded pieces 11, 61, 13 in the form of a right isosceles triangle on both side edges of the upper pieces 10, 60,
63 are arranged in a row, and the folded pieces 11, 61, 13, 6
3 has right isosceles triangular folded pieces 12, 62, 14, 64 connected to each other via the oblique sides, and the upper pieces 10,
60, the front piece 15 and the rear piece 65 are inserted through folds c and d.
The folded pieces 12, 62, 14, 64 are provided with side pieces 16, 66, 17, 67 adjacent to the front piece 15 and rear piece 65 via folds c and d, and these folded pieces Side seal pieces 41, 42, 91, 92, 4 are provided on both sides of the piece and side pieces through folds.
It has a structure in which 5, 46, 95, and 96 are arranged in a row, and is folded in half by the folds m and n between the side piece and the side seal piece, and the fold d between the folded piece and the side piece. It is a sealed container to which a narrow lining tape is adhered, which covers the intersection parts p, p which are folded into four by either of or c and the spout 2 formed in the upper piece 60. . The above-mentioned sealed container, characterized in that the spout is formed in the upper piece adjacent to the fold forming the intersection portions p, p which are folded into four.

(Example) The embodiments shown in the drawings will be explained below.

As shown in Figure 1, the blanks of this sealed container are made of plastic film, aluminum foil (Al),
It is a composite sheet made by laminating multiple sheets of paper, etc., with the innermost layer being a heat-sealable resin layer. In this example, polyethylene (PE)/paper/PE/
It is a five-layer composite material of aluminum foil/polyethylene terephthalate (PET)/PE.

This blank has upper pieces 10, 60 symmetrical through the central fold a, folded pieces 11, 61, 13 in the form of a right isosceles triangle on both sides of the upper pieces 10, 60,
63 are arranged in a row, and each fold b, b, b, b
Right-angled isosceles triangular folded pieces 12, 6 through
2, 14, and 64 are arranged in series.

A front piece 15 and a rear piece 65 are connected to the upper pieces 10 and 60 via folds c and d, respectively, and side pieces 1 are attached to the folded pieces 12, 62, 14, and 64, respectively.
6, 66, 17, and 67 are arranged in series.

Further, bottom pieces 20 and 70 are connected to the front piece 15 and the rear piece 65 through folds e and f, and the side pieces 1
Right-angled isosceles triangular folded pieces 21, 71, 23, and 73 are connected from 6, 66, 17, and 67.

Each folding piece 21, 71, 23, 73 is connected to a right isosceles triangular folding piece 22, 72, 24, 74 via hypotenuses g, g, g, g.

The bottom piece 20 and the folded pieces 22 and 24 have a fold h.
Similarly, the bottom seal piece 80 is connected to the bottom piece 70 and the folded pieces 72 and 74 via the fold i.

Side seal pieces 41 and 4 are attached to the left and right sides of these folded pieces, side pieces, and bottom seal pieces through folds m and n.
2, 43, 44, 91, 92, 93, 94, 4
5, 46, 47, 48, 95, 96, 97, 98
are installed in succession.

Each of the side pieces 16, 66, 17, and 67 is formed with folds r, r, r, and r for preventing the present sealed container from expanding laterally after the contents are sealed.

Further, the bottom piece 20 is similarly provided with V-shaped folds s, s to prevent it from bulging toward the bottom.

When these folds r and s are formed in a multilayer composite material as described above, it is difficult to bend in the outward convex direction, but it is easy to bend in the inward convex direction, so it is difficult to form such folds. By doing so, the surface on which the folds are formed is bent inwardly and convexly, and by providing such folds, the box becomes a square box that does not bulge and is easy to stand up.

The container spout is at points p and p where cracks are likely to occur as described below.
It is preferable to provide the upper piece 60 of the side. The spout type of this embodiment is a tear-open type drinking spout 2, and has a configuration as shown in FIG. 2. In other words, tear tape 4 is
It is a composite material of PET/Al/PE and is adhered to the surface of the spout 2 with an oval hole.

A backing tape 6 is adhered to the back surface of the drinking spout 2. This backing tape 6 is made of a single PE film with a thickness of approximately 100 μm, and when the tear tape 4 is peeled off, the backing tape 6 adhered to the tear tape 4 at the mouth film part will stick to the tear tape 4 side and tear, causing it to open. to be pierced.

This backing tape 6 is adhered so as to cover the folded portions p, p where cracks are likely to occur.

The parts p and p of this carton where cracks tend to occur are the positions of the folds shown in the figure. That is, as shown in FIG. 3, after sealing the side seal pieces, the rear piece 65 is sealed.
Since it is assembled so as to be folded and glued to the side side pieces 66 and 67, these parts p and p are folded in half at the folds m and n on the outside where the side seal pieces 42 and 46 are folded, Furthermore, it is folded at a crease d that is perpendicular to this crease, and is folded into four. Therefore, the portions p and p, which are the intersections of the folds m and n and the fold d, are stretched so much that they are likely to be cracked.

Therefore, the backing tape 6 is adhered to the drinking spout 2 so as to cover the portions p and p. That is, it is necessary to adhere the backing tape 6 so as to cover at least the fold d, the drinking spout 2, and the folds m and n. At this time, if the backing tape 6 is adhered with a width that does not reach the fold a, the bendability of the fold a is not impaired and the amount of tape used can be reduced.

Parts q and q are also folded into quarters at folds j and k and crease i, so they are prone to cracking like parts p and p, but parts q and q are folded after filling with hot contents. Since it is bent and sealed, that is, it is bent and sealed while being heated and softened by the contents, so it is in a condition where cracks are less likely to occur than parts p and p. Therefore, in this embodiment no backing tape is provided for portions q, q. However, if necessary, a backing tape covering the portions q, q may be further adhered.

(Function) In order to assemble the blank thus obtained and seal the contents, first fold the blank in half from fold a, as shown in FIG. 94, 45-48
and 95-98 are sealed.

Then, the assembly machine creates folds b, c, d, j,
Bend k, m, n, etc. appropriately, return fold a to flatten except for both ends, and further fold back pieces 11, 12, 61, 62 that protrude in a triangular shape, and side seal pieces 41, 9.
1, the folded pieces 13, 14, 63, 64, and the side seal pieces 45, 95 are each folded toward the side of the box and glued together to complete a box with an open bottom.

After filling the contents from the bottom of the box, the bottom seal pieces 30 and 80 are sealed and sealed, and the fold e,
F, g, h, i, etc. are bent, and the protruding triangular folded pieces 21-23, 71-74, etc. are folded and adhered to the bottom of the box, thereby completing the sealed packaging of the contents.

Since the present invention has the above configuration, it has the following excellent practical effects.

In other words, the width of the lining tape, which serves both as a lining tape for the spout of a sealed container and as a lining tape for reinforcing folds when folding a large number of sheets, can be made extremely narrow compared to the conventional technology. Moreover, the reinforcing tape can be bonded very effectively to the intersection points that are to be reinforced, since these are the parts that require reinforcement and are bent at normal temperatures.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a plan view of the inner surface of the blank of the sealed packaging box, Fig. 2 is a sectional view of the spout, and Fig. 3 is a perspective view of the assembled state. It is. 10, 60...Top piece, 11-14, 21-2
4, 61-64, 71-74... Folded piece, 15
...Front piece, 65...Rear piece, 16, 17, 66, 6
7... Side piece, 20, 70... Bottom piece, 30, 80...
...Bottom seal piece, 41-48, 91-98...Side seal piece, 2...Taste, 4...Tear tape, 6
...Backing tape, a~n...fold, r, s...
Fold, p, q...intersection part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a rectangular parallelepiped-shaped sealed container made by folding, sealing, and gluing a blank made of a composite sheet mainly made of paper and having a heat-sealable resin layer as the innermost layer, The blank has an upper piece 10, 60 symmetrical with a fold a in the center, and folded pieces 11, 61 in the form of a right isosceles triangle on both sides of the upper piece 10, 60.
13, 63 are arranged in series, and the folded pieces 11, 61,
Folded pieces 12, 62, 14, and 64 of right-angled isosceles triangles are connected to the upper pieces 10 and 60 through folds c and d, respectively, through the oblique sides thereof. 65, folded pieces 12, 62, 1
4 and 64, the side pieces 16 and 6 are inserted through the folds c and d.
6, 17, 67 are arranged adjacent to the front piece 15 and the rear piece 65, and side seal pieces 41,
It has a structure in which 42, 91, 92, 45, 46, 95, and 96 are arranged in a row, and is folded in half by the folds m and n between the side piece and the side seal piece, and the folded piece and the side seal piece are A sealed container to which a narrow lining tape is adhered, covering the intersection parts p, p which are folded in four by either the folds d or c between the two, and the spout 2 formed in the top piece 60. . (2) The intersection point p where the spout is folded into four,
The sealed container according to claim 1, wherein the container is formed on the upper piece adjacent to the fold forming the p.