JPS5822916Y2 - Sealed container with easy opening structure - Google Patents

Description

[Detailed description of the invention] The present invention relates to a top-opening container for storing liquids, powders, etc. In particular, the top opening is sealed with a separate lid body, which has an easy-to-open structure. This relates to sealed containers.

Conventionally, this type of opening structure has been developed and used primarily for the purpose of containing liquids or powders.

Taking a square container as an example, a conventional sealed container with an easy-to-open structure is, for example, made of paperboard that is waterproof and heat-sealable on both sides, as shown in the developed view of Figure 1. , the side plates 1, 2, 3, 4.5 on the fold lines 1a, 1b
, I C, 1d, and is made by connecting the side plate 1 and the side plate 5 by heat sealing.
It has a body part as shown in .

Incidentally, the bottom of the body part a is sealed by a well-known conventional technique, but it is omitted in the drawing.

Further, a piece of aluminum foil is indicated by the reference numeral 6, and a part of this is placed inside the body of the container, then folded back to the outside and held between the corners of the side plates 3 and 4 as shown in FIG.

Both sides of this aluminum foil piece 6 have heat sealability due to synthetic resin lamination processing, but the side plate 3,
The surface in contact with 4 is prepared using a known release agent such as nitrocellulose so that thermal fusion by heat sealing is extremely weak.

FIG. 2 is a developed view showing the lid plate of a conventional sealed container having an easy-to-open structure, and is made of paperboard that is waterproof and heat-sealable at least on the back side.

Fitting pieces 9 are provided around the top plate 7 via fold lines 8, and clamp pieces 11 are each extended via fold lines 10. is provided with a cutting line 12 for opening.

As shown in FIG. 3, each fitting piece 9 of the lid plate constructed as described above is bent vertically along the fold line 8, and in this state, the top plate 7 is inserted into the interior of the body part a.

In this case, if an uncut portion 13 is provided between each fitting piece 90, the sealing by the cover plate will be more complete.

Next, each clamping piece 11 is bent outward along the fold line 10, and the fitting piece 9 and the clamping piece 11 sandwich each side plate of the body part a, and heat fusion bonding is performed by heat sealing.

In this case, the aluminum foil piece 6 has a double-opening service cutting line 12.1
Make it exist between 2.

In this way, a sealed container as shown in FIG. 4 is produced.

When opening this, cut the opening line 12 of the clip 11.
When the inner side of the aluminum foil 12, that is, the part where the aluminum foil piece 6 is present, is peeled off from the side plates 3 and 4 together with the aluminum foil piece 6 and lifted upward, the insert piece 9 is easily removed together with the aluminum foil piece due to the action of the above-mentioned release agent. It is peeled off from the side plates 3 and 4 and can be easily opened as shown in FIG.

However, in the conventional example as described above, although it is extremely easy to seal and open the bag, since the state after opening is only one corner of the cover plate as shown in Fig. 5, it is difficult to freely take out the stored items. This is inconvenient, especially when filled with highly viscous paste-like or grease-like materials or lump-like solid materials, which are difficult to remove with a spoon or the like.

Therefore, the present invention improves the drawbacks of the conventional example described above, and creates a new opening in which a desired opening is formed in the lid plate so that even if highly viscous items are stored, they can be easily taken out with a spoon, etc. The present invention aims to provide a sealed container having a structure.

The present invention will be explained below with reference to FIG. 6 and subsequent figures.

FIG. 6 shows an embodiment of the cover plate b' according to the present invention, and the same parts as in the example of FIG. 2 are given the same reference numerals.

The cover plate b' has a structure similar to that of the conventional example shown in FIG. 2, and has adjacent clamping pieces 11. ．． ．． A perforation line 14, such as a perforation or a half-cut line, is provided on the top plate 7 starting from the edge of the top plate 11 to form a desired opening.

Next, in this state, waterproofing and heat sealing are applied to at least the back surface.

This processing may be done by simply laminating polyethylene or the like, or if necessary, after laminating a metal foil such as aluminum, it may be heat-sealable with polyethylene or the like.

In this way, the stored liquid will not leak from the part of the perforation line 14 formed by the perforation or the half-cut line, and the sealing performance will be maintained.

The present invention uses the lid plate b' configured as described above to seal the top opening of the body part a as shown in FIG. 3 described in connection with the conventional example by the same method as described above. It is something.

When opening the package, attach the clip 11. on the inside of the tear line 14.14. ．． , 11 and the fitting pieces 9, 9 together with the aluminum foil piece 6 are peeled off from the side plates 3, 4, and then the cutout line 14 on the thick root is removed.
The package is opened by removing the portion inside the perforation line 14 along the line 14.

That is, as shown in FIG. 7, after opening, unlike the conventional example, there is no unsightliness after opening, and the desired opening 15 is obtained, allowing the stored items to be taken out and put in freely. Become.

Furthermore, if the remaining items are to be stored after the required amount of stored items have been taken out, the container may be covered with a lid made of synthetic resin or paper.

In addition, in the above embodiment, the clamping piece 11.11 and the fitting piece 9
．． 9 is due to the peeling action of the aluminum foil piece 6, but the use of the aluminum foil piece 6 is omitted and the clamping piece 11.
The same effect can be obtained by applying a release agent directly to the peeled-off portions of 11 and the fitting pieces 9, 9.

What is shown in FIG. 8 is another embodiment of the cover plate b' according to the present invention. It is provided on the fold line 8, and by doing so, the entire surface of the top plate 7 can be opened.

Furthermore, in the embodiment shown in FIG. 9, the cutoff line 14 is provided on the fold line 10, and when the package is opened, the insert piece 9 remains on the inner surface of the body as shown in FIG. The top of the torso can be completely opened.

In this case, the heat-sealing between the fitting piece 9 and the inner surface of the body should be weakened by using a release agent, or heat-sealing in a linear manner to narrow the heat-sealing area. This will make opening the package easier.

In the embodiment shown in FIG.
It is provided in the middle between the two, that is, on the fitting piece 9, and the entire top surface of the body can be opened while leaving a part of the fitting piece 9 on the inner surface of the body.

In this case as well, the heat fusion between the fitting piece 9 on the inside of the perforation line 14 and the inner surface of the body can be done by weakening the fusion strength by using a release agent, or by performing heat sealing in a linear manner. If the fused area is made narrower, the unsealing operation will be easier.

The present invention was explained above using a rectangular prism-shaped container as an example.
It will be obvious to those skilled in the art that the present invention can be similarly applied to cylindrical containers, triangular prism-shaped containers, or polygonal prism-shaped containers other than square prisms such as hexagonal prisms.

In the case of a cylindrical container or a hexagonal columnar container, the cutting line is set from two points on the edges of the clamping pieces that are extremely short compared to the total circumference of the top opening, for example, the distance between them or less. will be established.

In addition, the shapes of the cutting lines are as shown in Figures 6, 8, 9, and 11.
In addition to the shape shown in the figure, any shape may be used as long as it allows the formation of an opening that surrounds at least most of the top plate.

As described above, according to the present invention, the opening on the lid plate is constructed by making perforations or half-cut lines in the paperboard, and then laminating it with a waterproof and heat-sealing layer, which improves the sealing performance. It is easy to open, and can replace the conventional double-lid or double-sided structure, allowing the container to be made smaller.

As a result, the packaging process can be simplified and transportation can be streamlined.

In more detail, the opening on the lid plate is a laminated board made of paperboard laminated with a heat-sealable layer of polyethylene, etc., so it is much easier to open than a double lid or double-sided one. The cut part after opening is extremely clean.

If there are perforations on only one side of the double lid, there is a problem that if you try to cut the inner and outer lids along the perforations at the same time, the side without perforations will not tear cleanly.
In the present invention, such problems do not occur, and both sealing performance and ease of opening are satisfied at the same time.

[Brief explanation of drawings]

Fig. 1 is a partially omitted opening showing one embodiment of the body of a container to which the present invention is applied, Fig. 2 is an exploded view showing a conventional lid plate, and Fig. 3 is the same as Fig. 2. FIG. 4 is a partially omitted perspective view showing the assembly process of a conventional container using a conventional lid plate shown in FIG. FIG. 6 is a partially omitted perspective view showing the state; FIG. 6 is a developed view showing one embodiment of the lid plate according to the present invention; FIG.
FIGS. 8 and 9 are partially omitted perspective views showing the open state of the container using the lid plate according to the present invention shown in FIGS. 10 is a partially omitted perspective view showing the opening process of a container using the lid plate according to the present invention shown in FIG. 9; FIG. The figure is a developed view showing still another embodiment of the lid plate according to the present invention. 1.2, 3, 4.5...Side plate, 6...
Aluminum foil piece, 7...Top plate, 8...
・Fold line, 9... Fitting piece, 10... Broken line, 11... Clamping piece, 14... Cutting line,
a... Torso, b. b'... Lid plate.

Claims (6)

[Scope of utility model registration request] (1) The lid plate attached to the top opening of a container made of paperboard coated with thermoplastic plastic is made of paperboard, and the lid plate has the same size as the top opening. a top plate located within the opening with a width, a first fold line defining the top plate, and a fitting that is located outside the first fold line and engages with the inner wall of the container. a second fold line defining the fitting piece and located at the edge of the front top opening;
a clamping piece that is located on the outside of the fold line and that engages with the outer wall of the container and cooperates with the fitting piece to clamp the edge of the container; A perforation line, a half-cut line, etc., which allows an opening to be formed that surrounds at least a substantially large part of the top plate, starting from two points on the edge of the clamping piece that are extremely short compared to the total circumference of the top plate. is formed, and at least a waterproof and heat-sealing layer is laminated on the back surface of the lid plate after forming the perforations or half-cut lines, and the fitting piece on the inside of the cut-out line and the A sealed container having an easy-to-open structure in which the fitting piece and the clamping piece are heat-sealed to the top opening of the container with a release agent interposed in the inner part of the clamping piece. (2) The container is a square container, and the cutting line starts from a clamping piece that engages with two adjacent sides of the square top opening of the square container. A sealed container having an easy-to-open structure as described in Section 1. (3) A sealed container having an easy-to-open structure according to claim 1 or 2, wherein the tear line is provided on the top plate. (4) A sealed container having an easy-to-open structure according to claim 1 or 2, wherein the tear line is provided on the first fold line. (5) A sealed container having an easy-to-open structure according to claim 1 or 2, wherein the tear line is provided on the second fold line. (6) A sealed container having an easy-to-open structure according to claim 1 or 2, wherein the tear line is provided on the fitting piece.