JPH0326108Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a sealed container in which milk, juice, etc. can be stored, especially a sealed container that is easy to open.

Prior Art This type of container is, for example,
As disclosed in Japanese Patent No. 65266, a band-shaped seal portion formed by joining the inner surfaces of both edges of the container material extends in the left-right direction on the top wall of the rectangular parallelepiped container body and extends over the top wall. is bent forward so as to be overlapped with the top wall, and an annular thin wall portion for forming an opening is provided in front of the seal portion of the top wall;
The covers are overlapped in front of the seal part of the top wall so as to cover the annular thin-walled part, and at least the inner and outer parts of the annular thin-walled part and the cover are joined to each other, and the inner part of the annular thin-walled part and the cover are joined to each other. It is known that the bonding strength of the annular thin-walled portion exceeds the breaking strength of the annular thin-walled portion.

Problems to be Solved by the Invention In the above container, the cover is separate from the container material, so when manufacturing the container, it is costly to manufacture the cover separately from the container, and the original cost of manufacturing the container itself is increased. In addition to this process, a step is required to overlap and bond the cover to the container, which increases the cost of the container.

The purpose of this invention is to solve the above-mentioned problems and provide a sealed container that can be manufactured at low cost and is easy to open.

Means for Solving the Problems The easy-to-open sealed container according to this invention is based on the above-mentioned conventional container, in which the cover is attached to one of both edges of the container material forming the sealing portion. It is characterized in that continuous or intermittent cuts for cutting are formed at the boundary between the seal portion and the cover, and are integrally continuous with the seal portion and the cover.

Function: In the easy-to-open sealed container according to this invention, the cover is integrally connected to one of the edges of the container material forming the seal, so the cover should be attached to the edge of the container material. By forming something like a tongue, there is no need to manufacture the cover separately from the container, and the cover is overlapped with the container when the sealing part is folded. No separate process is required.

In addition, since continuous or intermittent cutting cuts are formed at the boundary between the seal and the cover, even though the container material and cover are integrated, when opening the container, the cover can be pulled to cut the cuts. , the cover is removed from the container.

Embodiment An embodiment of this invention will be described below with reference to the drawings.

The sealed container includes a container body 11 that is square in plan view;
It has two triangular ears 12 provided at its upper end, and has a generally known form as a whole. The molding method is to overlap and seal the outer surface of one container material and the inner surface of the other at both edges of a single container material. Expanding a folded blank into a rectangular tube shape; Forming a bottomed rectangular cylindrical container by flattening and closing one end of the rectangular cylindrical blank; Filling the bottomed rectangular cylindrical container with contents. After that, the upper edge of the container is sealed, and the upper part of the bottomed rectangular cylindrical container is flattened to form a triangular ear.

The container main body 11 has four side walls 13 to 16 on the front, rear, left and right sides, and a top wall 17 connected to the upper ends of these side walls.
It has Although not shown, the bottom of the container body 11 is closed by the method described above. The triangular ears 12 are connected to two ridges in the front and back direction formed by the left and right side walls 15 and 16 and the top wall 17, are bent downward along the same ridges, are overlapped with the left and right side walls 15 and 16, and are bonded thereto. has been done.

When the upper edge of the bottomed rectangular cylindrical container is sealed, a horizontal seal portion 18 is formed. The triangular ears 12 extend in the left-right direction, and are simultaneously bent forward when the triangular ears 12 are bent, and are overlapped on the top wall 17. When one outer surface and the other inner surface of both edges of a sheet of packaging material are overlapped and sealed, a vertical seal portion 19 is formed. It extends in the vertical direction, and further extends in the front-back direction along the left edge of the top wall 17 so that one end reaches the horizontal seal portion 18. Although not shown, a portion of the vertical seal portion 19 also extends to the bottom of the container body 1.

An annular thin-walled portion 20 for forming an opening is provided in a left-hand portion of the top wall 17 in front of the horizontal seal portion 18 , and the annular thin-walled portion 20 and the inner portion thereof are connected to both edges of the container material of the horizontal seal portion 18 . One side is covered with a cover 21 provided integrally therewith. Intermittent notches 28, such as perforations, are provided at the boundary between the cover 21 and the horizontal seal portion 18.
The annular thin wall portion 20 has an outwardly expanding oval shape extending from the center of the top wall 17 toward the left edge, and is formed by removing a portion of the container material, as shown in detail in FIG. It is something that That is, the container material is sequentially coated with polyethylene layer 2 from the outside.
2, paper layer 23, polyethylene layer 2 as adhesive
4. It is made of a laminated material consisting of an aluminum foil layer 25 and a polyethylene layer 26, and a V groove 27 reaching from the outer polyethylene layer 22 to the aluminum foil layer 25 is formed in the portion that becomes the annular thin wall portion 20 of the packaging material. , as a result, V of the container material
The aluminum foil layer 25 remaining at the bottom of the groove 27 and the polyethylene layer 26 inside it form the annular thin wall portion 2.
0 is formed. Note that when forming the V-groove 27, the aluminum foil layer 25 may also be removed, leaving only the polyethylene layer 26 inside. The cover 21 has a rectangular shape that is long in the left-right direction, and the top wall 17 of the entire length of the horizontal seal portion 18 is
The upwardly bent portion extends to the lower edge of both edges of the container material which are stacked one above the other. A hot melt adhesive 29 is interposed between the inner portion of the annular thin wall portion 20 and the cover 21, and the adhesive 29 adheres the two to each other. This adhesive strength exceeds the breaking strength of the annular thin wall portion 20 when the container is opened, which will be described later. In addition, for the above-mentioned adhesion,
Instead of using the adhesive 29, the outermost polyethylene layers 22 and 26 of the container material may be used as an adhesive, and it is possible to bond not only the inner part of the annular thin wall part 20 but also the outer part and the cover 21. They may also be glued together.

When opening the container, as shown in Figure 2,
All you have to do is pinch the right end of the cover 21 with your fingers and pull it up. Then, the notch 28 breaks and at the same time the inner part of the annular thin wall part 20 that is adhered to a part of the cover 21 tries to be lifted, so that the annular thin wall part 20 breaks from the inner end to the outer end. progresses and the entire annular thin wall portion 20 is fractured, thereby forming an opening inside the annular thin wall portion 20. By breaking the entire notch 28, the cover 21
is removed from the container, but the inner part of the broken annular thin wall portion 20 remains adhered to the cover 21 and is removed from the container together with the cover 21.

Effects of the invention According to this invention, if a tongue-like part to serve as a cover is formed on the edge of the container material, there is no need to manufacture the cover separately from the container, and when the seal part is folded. Since the cover is superimposed on the container, there is no need for a separate process from the original process for manufacturing the container itself, so the container can be manufactured at low cost.

Further, even though the container material and the cover are integrated, the cover can be removed from the container by cutting the cut by pulling the cover when opening the container, so the container can be easily opened.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a perspective view, FIG. 2 is a perspective view showing an unsealed state, and FIG. 3 is an enlarged sectional view taken along the line - in FIG. 1. DESCRIPTION OF SYMBOLS 11... Container body, 17... Top wall, 18... Seal part, 20... Thin wall part, 21... Cover, 28
...notch.

Claims (1)

[Claims for Utility Model Registration] A band-shaped seal portion 18 formed by joining the inner surfaces of both edges of the container material to each other extends in the left-right direction on the top wall 17 of the rectangular parallelepiped container body 11. An annular thin wall portion 20 for forming an opening is provided in front of the seal portion 18 of the top wall 17 and is bent forward so as to be overlapped on top of the seal portion 18 of the top wall 17 so as to cover the annular thin wall portion 20. The cover 21 is overlapped in front, and at least the inner and outer parts of the annular thin part 20 and the cover 21 are joined to each other, and the bonding strength between the inner part of the annular thin part 20 and the cover 21 is equal to that of the annular thin part 20. In a container that has a breaking strength of A sealed container that is easy to open, characterized in that a continuous or intermittent cut 28 is formed therein.