Paper containers

Abstract

To provide a paper container that can be easily and precisely opened along a predetermined opening line for forming an opening of the paper container.SOLUTION: According to a paper container that is formed to be capable of storing a content inside with a paper sheet as a substrate, a half-cut for forming an opening at a predetermined position is provided from front and rear sides of the paper substrate along a predetermined opening line. When box-making the paper container, a discontinuously shaped half-cut is provided on a front face of the paper substrate with a face formed to be a container outer side as a front face of the paper substrate and a face formed to be a container inner side as a rear face of the paper substrate, and a continuously shaped half-cut is provided on the rear face of the paper substrate.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a mechanism for opening a paper container, and in particular to a front and back half-cut zipper that is provided with half cuts to facilitate opening in a pre-intended shape, enabling easy and accurate opening. [Background technology]

[0002] Packaging containers come in a variety of shapes and sizes, among which paper containers are widely used in a wide range of fields for a variety of products, such as confectionery, food, and daily necessities. Paper containers have become indispensable for modern consumers, and are found on the shelves of supermarkets, retail stores, and convenience stores.

[0003] Because paper containers are made from paper, they have a certain level of mechanical strength, such as rigidity, and are lighter and less expensive than glass bottles, metal cans, and plastic bottles. They can also be folded flat, making them stackable and compact, and highly convenient to transport and handle.

[0004] It is also easy to provide a printing layer on the surface. For example, if a barcode is printed on the surface, it can be used for managing distribution, inventory, and sales, as well as being useful as a source of marketing information.

[0005] In addition, the surface of the paper container can be decorated with processes such as printing, coating, and hot stamping, and it is also possible to print logos and information about the contents of the product, especially in high resolution, making it possible to differentiate the product.

[0006] Furthermore, since the material is paper, it can be recycled after use. Even if it needs to be discarded, it can be easily reduced in volume and incinerated, making it an environmentally friendly packaging container.

[0007] Some paper containers can be opened to remove the contents all at once and then recycled or discarded as is, while others can be opened and closed repeatedly to remove or insert the contents each time. In this case, convenience can be increased by determining the position and shape of the opening in advance according to the purpose.

[0008] In this case, for example, a planned opening line is provided to form an opening, and it is possible to open the package in a predetermined shape using perforations, etc., and a mechanism is provided to close the opening after opening and temporarily secure the opened portion.

[0009] Patent Document 1 shows an example of making half cuts on the front and back of such a paper box to seal the opening of a container such as a confectionery box, but there is a risk of the paper peeling off unexpectedly in the direction perpendicular to the half cut, which is a problem in practical use. Also, if there are parts where the gaps between the half cuts, called joints, match on the front and back, there is a risk that the opening spool will deviate in an unintended direction when opening. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Utility Model Application Publication No. 54-14830 Summary of the Invention [Problem to be solved by the invention]

[0011] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a front and back half-cut zipper that can be easily and accurately opened along the planned opening line for forming an opening of a paper container. [Means for solving the problem]

[0012] As a means for solving the above problem, the invention described in claim 1 is: It is made of paper and is capable of storing contents inside. Half cuts are made on the front and back of the paper base material along the intended opening line to form an opening at a specified position, When the paper container is assembled, the surface that will become the outside of the container is The above The surface of the paper base material, the surface that will become the inside of the container The above As the back side of the paper base material, The above The surface of the paper base material is provided with discontinuous half cuts, The above The back side of the paper base has a continuous half cut A paper container provided with The opening line is located on the front surface of the formed paper container, and the opening line is located on the top surface of the formed paper container. A first certain distance portion along the intended opening line on the front surface from the starting point is provided with only a discontinuous cut line penetrating the front and back, A second certain distance portion along the opening planned line spanning the front surface and the top surface, including a folding portion which is a boundary between the front surface and the top surface, and a third certain distance portion along the opening planned line from the end point to the top surface are provided with only continuous or discontinuous cut lines penetrating the front and back surfaces; Between the first constant distance portion and the second constant distance portion, and between the second constant distance portion and the third constant distance portion, the half cuts are provided in a discontinuous shape on the front surface, and the half cuts are provided in a continuous shape on the back surface. This is a paper container characterized in that it is provided with

[0013] The invention described in claim 2 is as follows: The above A half cut of a discontinuous shape on the surface of the paper base material; The above A continuous half cut on the back side of the paper base material, The above The paper container according to claim 1, characterized in that the opening line is offset and provided at different positions on the front and back sides along the intended opening line.

[0014] The invention described in claim 3 is as follows: Each cut that forms a discontinuous half cut on the surface of the paper base material has a dogleg shape. The paper container according to claim 1 or 2 is characterized in that:

[0016] Also, claims 4 The invention described in It is made of paper and is capable of storing contents inside. Half cuts are made on the front and back of the paper base material along the intended opening line to form an opening at a specified position, When the paper container is assembled, the surface that will become the outside of the container is The above The surface of the paper base material, the surface that will become the inside of the container The above As the back side of the paper base material, The aboveThe surface of the paper base material has a continuous half cut, The above The back side of the paper base has a discontinuous half cut A paper container provided with The opening line is located on the front surface of the formed paper container, and the opening line is located on the top surface of the formed paper container. A certain distance portion along the intended opening line on the front surface from the starting point is provided with only a discontinuous cut line penetrating the front and back, A first certain distance portion along the intended opening line on the front surface from the starting point is provided with only a discontinuous cut line penetrating the front and back, A second certain distance portion along the opening planned line spanning the front surface and the top surface, including a folding portion which is a boundary between the front surface and the top surface, and a third certain distance portion along the opening planned line from the end point to the top surface are provided with only continuous or discontinuous cut lines penetrating the front and back surfaces; Between the first constant distance portion and the second constant distance portion, and between the second constant distance portion and the third constant distance portion, the half cut is provided in a continuous shape on the front surface, and the half cut is provided in a discontinuous shape on the back surface. This is a paper container characterized in that it is provided with Effect of the Invention

[0017] According to the present invention, it is possible to provide a paper container that can be easily and accurately opened along a planned opening line for forming an opening of the paper container.

[0018] When the paper container is made, the surface that will be the outside of the container is the front surface of the paper base material, and the surface that will be the inside of the container is the back surface of the paper base material. The front surface of the paper base material has a discontinuous half cut, and the back surface of the paper base material has a continuous half cut. This makes it possible to prevent delamination of the paper base material and unexpected opening, even if a force is applied from the outside of the paper container in a direction perpendicular to the intended opening line. In addition, because it is a half-cut configuration from the front and back, it is easy to open. The paper will not unintentionally fold along the intended sealing line.

[0019] Also, during the opening process, if the gaps in the half cuts, called seams, match on the front and back, there is a risk that the opening vessel will deviate in an unintended direction when opening. However, in the paper container of the present invention, the back side of the paper base material is a continuous half cut, so there are no seams, and it is therefore possible to prevent opening from deviating from the intended opening line.

[0020] Also ,paperThe container has a discontinuous half cut on the front side of the paper base material and a continuous half cut on the back side of the paper base material, which are offset from each other and positioned in different positions on the front and back along the intended opening line, preventing the half cuts from overlapping and becoming more fragile than necessary, which can prevent erroneous opening during handling, storage, or even before the opening operation.

[0021] Furthermore, because there is an offset in the half cuts on the front and back, when the front and back half cut zipper is opened along the intended opening line, this offset portion peels off between the layers of the paper base material, and even if, for example, the discontinuous half cut from the front surface has a zipper-like shape with a sharp corner, this sharp corner is prevented from protruding from the edge of the opening, resulting in a safe opening mechanism.

[0022] In addition, the peeled area between the layers of the paper base material becomes an overlapping portion when the paper container is resealed after being opened, which is effective in improving the resealing efficiency.

[0023] Also , open By providing it on a partial section of the intended sealing line, it is possible to configure the entire intended opening line in combination with a more suitable easy-opening mechanism depending on the shape of the intended opening line.

[0024] Also , open By providing a continuous or discontinuous cut line that penetrates the front and back of the container at a certain distance from the start point of opening the intended sealing line and continues from the end point along the remaining intended opening line, it is possible to realize a paper container that is easier to open and allows for accurate opening.

[0025] In addition, when temporarily fastening the tab-shaped area formed by a cut line that passes from the start point of the opening through the front and back of the package by inserting it into a slit when resealing the package, the effect of making the package easier to insert is obtained. [Brief description of the drawings]

[0027] [Figure 1]FIG. 1 is a schematic perspective view illustrating one embodiment of a paper container and an intended opening line according to the present invention. [Diagram 2] FIG. 2 is a schematic perspective view for explaining a state in which the paper container according to the present invention has been opened. [Diagram 3] FIG. 3 is a planar development schematic diagram of the example of the paper container shown in FIG. 1, for illustrating one embodiment of the paper container according to the present invention. [Figure 4] FIG. 4 is a partially enlarged schematic plan view and a corresponding partially cross-sectional schematic view for explaining in more detail one embodiment of a paper container according to the present invention. [Diagram 5] FIG. 5 is a partially enlarged schematic plan view of an opened paper container and a corresponding partial cross-sectional schematic view for explaining one embodiment of the paper container according to the present invention in more detail. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] The present invention will be described in more detail below with reference to Figs. 1 to 5. However, the present invention is not limited to the examples shown here. The present invention is defined by the claims.

[0029] FIG. 1 is a schematic perspective view illustrating one embodiment of a paper container and an intended opening line according to the present invention.

[0030] The front and back half-cut zipper of the present invention is an easy-open mechanism for opening a paper container (10), and when used on the paper container (10), is effective in easily and stably forming a planned opening.

[0031] There are no particular limitations on the paper used for the paper container (10). For example, any paperboard or the like can be selected and used as long as it has a certain required rigidity and mechanical strength, can be half-cut from the front and back according to the present invention, and can be peeled between the layers of the paper base material when there is an intermediate region due to the misalignment of the half-cuts on the front and back, as described below.

[0032] Once the paper container (10) has been assembled, the paper base material can be surface decorated, such as by printing, on the surface that is visible from the outside. For example, information about the contents can be displayed by printing, a logo can be printed for advertising purposes or to differentiate the product, or a design can be improved by printing a picture or varnishing. In addition, it is convenient for the opening operation of the paper container (10) to visualize the position of the intended opening line (12) by using a printing method or the like.

[0033] The example shown in Fig. 1 is a rectangular parallelepiped paper container (10). The opening of this paper container (10) begins at the opening start point (11) on the front surface (30) and reaches the top surface (20), and the shape of the opening is an area surrounded by a planned opening line (12) and a fold line (13). The front and back half-cut zipper of the present invention is formed along this planned opening line (12).

[0034] The opening is intended to be performed by lifting and moving the starting point of opening (11) in the direction of the arrow (15) in the figure, cutting and opening the paper base material along the intended opening line (12) and forming an opening from the front surface (30) to the top surface (20). The opened portion is not cut away, but folded along the fold line (13) to serve as a lid for the formed opening, making it possible to open and close the paper container (10).

[0035] This is not a limitation of the present invention, and it is also possible to completely separate and remove the paper base material of the opening formed anywhere on the paper container (10). These can be appropriately selected and designed depending on the contents and their use. The opening can be formed on one surface or on multiple surfaces, and can be arbitrarily planned from the viewpoint of design and depending on the use of the contents.

[0036] The paper container (10) is formed using paper as a base material so that contents can be stored inside, and a planned opening line (12) is planned for forming an opening at a specified position on the paper container (10).The front and back half-cut zipper of the present invention is effective for enabling accurate opening along this planned opening line (12).

[0037] That is, the present invention is an easy-open mechanism for opening a paper container (10), in which a discontinuous half cut is provided on the surface of a paper base material along a planned opening line (12), This is a front and back half-cut zipper, characterized in that a continuous half-cut is provided on the back surface.

[0038] Therefore, the front and back half-cut zipper of the present invention makes it possible to easily and accurately open the paper container (10) using fingers in a pre-planned position and shape.

[0039] FIG. 2 is a schematic perspective view for explaining a state in which the paper container according to the present invention has been opened.

[0040] The opening of the paper container (10) starts from the opening start point (11) and proceeds along the intended opening line (12). The front and back half-cut zipper is provided along the intended opening line (12) and is an example in which the container is opened from the front surface (30) to the top surface (20).

[0041] The opening operation is performed by pinching the opening start point (11) with the fingers and pulling it in the direction of the arrow (15), cutting the front and back half-cut zipper and forming an opening (40). At this time, the two front and back half-cut zippers, one on the left and one on the right, are cut at the same time, so the opening operation can be completed in a short time. The opening (40) shown in this example is a large opening that reaches from the front surface (30) to the top surface (20), making it very convenient for picking out the contents with the fingers, for example.

[0042] In the example shown in Fig. 2, after the opening 40 is formed, the portion of the tab 16 formed near the opening start point 11 is inserted into a slit 14 in the front surface 31 that is provided beforehand on the inside of the front surface 30, making the paper container 10 resealable. The resealability of the paper container 10 allows the contents to be taken out and inserted repeatedly.

[0043] FIG. 3 is a planar development schematic diagram of the example of the paper container shown in FIG. 1, for illustrating one embodiment of the paper container according to the present invention.

[0044] As shown in the blank (9) of the example paper container (10) shown in Figure 1, the front and back half-cut zipper (3) of the present invention is provided across the front surface (30) and the top surface (20), and is provided along the intended opening line (12) shown in Figure 1.

[0045] The front and back half-cut zipper (3) according to the present invention is made by half-cutting from the front and back of a paper base material, and is made up of a discontinuous half-cut (1) on the front side of the paper base material and a continuous half-cut (2) on the back side of the paper base material. However, it may be made up of a continuous half-cut on the front side of the paper base material and a discontinuous half-cut on the back side of the paper base material.

[0046] These are provided along the planned opening line (12), and in order to open the paper container (10), the front and back half-cut zippers (3) are cut and opened to form the planned opening (40).

[0047] That is, in the example shown in FIG. 3, starting from the starting point (11) of the opening, two front and back half-cut zippers (3) that continue symmetrically from the front surface (30) to the top surface (20) are simultaneously cut.

[0048] In addition, the front and back half-cut zipper (3) of the present invention has a surface in the form of discontinuous half-cuts (1) on the surface of the paper base material, and is more effective in preventing the paper from curling when force is applied in a direction perpendicular to the straight line than when the half-cuts on the surface are in a continuous straight line shape.

[0049] As shown in FIG. 3, in the present invention, the front and back half-cut zipper (3) can be arranged such that the discontinuous half-cut (1) on the front side of the paper base material and the continuous half-cut (2) on the back side of the paper base material are not at the same position on the front and back along the intended opening line (12) shown in FIG. 1, but are shifted and positioned in different positions, as can be seen in FIG. 3.

[0050] In this case, the half cuts on the front and back each effectively contribute to the opening, making it possible to produce a front and back half cut zipper (3) that allows for easier and more accurate tearing and opening operations, as intended by the present invention.

[0051] Furthermore, if there is a misalignment in the position of the front and back half cuts, when the front and back half cut zipper (3) is cut to open the paper container (10), the misaligned portion will peel off between the layers of the paper base material, and even if the edge of the cut end has a sharp angle due to, for example, a discontinuous half cut (1) from the surface of the paper base material, this sharp angle will be prevented from protruding from the cut end, making for a safe opening mechanism. The features of this opening mechanism will be described in more detail later, starting with Figure 4.

[0052] The front and back half-cut zipper (3) does not have to be provided on the entirety of the intended opening line (12). The front and back half-cut zipper (3) can be provided on a portion of the intended opening line, and for example, a portion of the intended opening line (12) may be constituted by the front and back half-cut zipper (3), and the remaining portion may be constituted by another easy-to-open mechanism. For example, a portion may be constituted by a perforation or cut line that penetrates from the front to the back.

[0053] In the example shown in Figure 3, the intended opening line (12) has a cut line (5) that penetrates both the front and back and is set at a certain distance from the starting point (11) of opening, and a front and back half-cut zipper (3) is set from the end point along the remaining intended opening line (12).

[0054] That is, as shown in the example of Fig. 3, the opening starts at the starting point (11) of the opening, at the cut line (5) that penetrates from the front to the back, and the front and back half-cut zipper (3) of the present invention has two lines branching off from there. In this way, the front and back half-cut zipper (3) makes it possible to realize easy and accurate tearing and opening operations by fingers.

[0055] Furthermore, as shown in the example of Figure 3, a cut line (5) that runs through both sides can be provided at the folded portion at the boundary between the top surface (20) and the front surface (30). Thus, a cut line (5) that runs through both sides is provided from the opening start point (11), two half-cut zippers branch off from there, and the two half-cut zippers converge to switch to the cut line (5) that runs through both sides, which further branch off to form two half-cut zippers. As a result, since a cut line (5) that runs through both sides is provided at the folded portion at the boundary between the top surface (20) and the front surface (30), it is possible to prevent the box from being unintentionally opened from the folded portion during box making.

[0056] As shown in the example of Fig. 3, the two half cuts converge near the end point (17) of the opening, forming a cut line (5) that penetrates the front and back. This prevents the intended opening line from passing the end point of the opening. Furthermore, the effect of preventing the intended opening line from passing the end point of the opening is further enhanced by the fact that the cut line that penetrates the front and back near the end point of the opening is curved.

[0057] In the example shown in FIG. 3, the opening start point (11) and the cut line (5) that penetrates the front and back A tab (16) shape is formed in the area surrounded by and, when resealing the paper container (10), this part can be easily inserted into a pre-formed slit (14) and can be temporarily fastened for resealing.

[0058] FIG. 4 is a partially enlarged schematic plan view and a corresponding partially cross-sectional schematic view for explaining in more detail one embodiment of a paper container according to the present invention.

[0059] The example shown in Figure 4 is a schematic plan view (partially see-through) of the front and back half-cut zipper (3) as viewed from the front side of the paper base material (8), i.e., the surface that will be the outside of the paper container (10), and a schematic diagram showing the cross section of the corresponding part, both of which are partially enlarged.

[0060] The discontinuous half-cut (1) on the surface of the paper base material (8) is a discontinuous half-cut processed from the surface of the paper, and the example shown here is an example of a shape also known as a zipper type.

[0061] In this case, it is effective for easy, accurate and stable opening, and the cut opening line is unlikely to deviate from the planned opening line (12). However, a saw-shaped protruding edge remains in the opened part.

[0062] The continuous half cut (2) on the back surface of the paper base material (8) is a continuous straight line processed from the back surface of the paper base material (8). In Figure 3, it is processed from the back surface of the paper base material (8) and is not visible from the front side of the paper base material (8). However, in the perspective view, it is represented by a dashed line, although it is a continuous straight line.

[0063] In addition, in the example shown in Figure 3, the half cut (1) having a discontinuous shape on the front side and the half cut (2) having a continuous shape on the back side of the paper base material (8) are offset from each other and positioned at different positions on the front and back, as shown by the amount of offset (a).

[0064] When this offset (a) is provided, there is no weak portion caused by the overlapping positions of the half cuts from the front and back, and the front and back half cut zipper (3) can be prevented from being opened accidentally.

[0065] FIG. 5 is a partially enlarged schematic plan view of an opened paper container and a corresponding partial cross-sectional schematic view for explaining one embodiment of the paper container according to the present invention in more detail.

[0066] As shown in the example in Figures 1 and 2, the paper container (10) can be opened by lifting and moving the starting point (11) of opening in the direction of the arrow (15) in the figure, thereby forming an opening (40) extending from the front surface (30) to the top surface (20).

[0067] By this opening, the paper base material (8) constituting the paper container (10) is torn and separated at the front and back half-cut zipper (3). In the example shown in Figures 1 and 2, the tearing of the front and back half-cut zipper (3) stops at the top surface (20), and the paper base material (8) covering the opening (40) remains.

[0068] Because the half-cut portions are relatively weak, tearing is performed from the front side of the paper base material (8) by half-cuts (1) having a discontinuous shape on the surface, and from the back side of the paper base material (8) by half-cuts (2) having a continuous shape on the back surface of the paper base material (8).

[0069] In the example shown in Figures 4 and 5, the half cut (1) having a discontinuous shape on the front side and the half cut (2) having a continuous shape on the back side of the paper base material (8) are offset from each other and placed at different positions on the front and back sides, and the portion sandwiched between the offset between the front and back sides is exposed to the surface as the delamination portion (7) of the paper base material (8) by the width of the offset (a).

[0070] In the example shown in Figure 5, the discontinuous half cut (1) on the surface of the paper base material (8) is a discontinuous half cut processed from the surface of the paper, and the example shown here is an example of a form also known as a zipper type.

[0071] As mentioned above, this is effective for easy, accurate and stable opening, and the cut opening line is unlikely to deviate from the planned opening line (12). However, a saw-shaped protruding edge (6) remains in the opened part.

[0072] If the protruding corner (6) becomes the edge of the opened part, the sharp corner may cause a phenomenon such as a pain when touching the finger. In the example shown in FIG. 5, In this case where the height of the protruding angle (b) is less than the amount of deviation (a), the protruding angle (6) does not become an edge and is surrounded by the delamination portion (7) of the paper base material (8), making it possible to prevent the sharp part from coming into direct contact with the hand.

[0073] Thus, according to the present invention, it is possible to provide a front and back half-cut zipper that can be easily and accurately opened along the intended opening line for forming an opening in a paper container. [Explanation of symbols]

[0074] 1. Half-cutting of discontinuous shapes on the surface of paper substrate 2. Half-cutting a continuous shape on the reverse side of the paper substrate 3. Front and back half-cut zipper 5. Cut line that penetrates through the front and back 6... salient angle 7. Delamination of the paper substrate 8...Paper base material 9. Blanks 10...Paper containers 11. Starting point of opening 12. Opening line 13... Fold line 14. Slit 15...Arrow 16...Tab 17...End of opening 20. Top 30...Front 31...Front 40...Opening a Displacement amount b Height of the salient angle

Claims

1. It is made of paper and is capable of storing contents inside. Half cuts are made on the front and back of the paper base material along the intended opening line to form an opening at a specified position, When the paper container is made into a box, the surface that will be the outside of the container will be the front surface of the paper base material, and the surface that will be the inside of the container will be the back surface of the paper base material. A paper container having a discontinuous half cut on a front surface of the paper base material and a continuous half cut on a back surface of the paper base material, The opening line is located on the front surface of the formed paper container, and the opening line is located on the top surface of the formed paper container. A first certain distance portion along the intended opening line on the front surface from the starting point is provided with only a discontinuous cut line penetrating the front and back, A second certain distance portion along the opening planned line spanning the front surface and the top surface, including a folding portion which is a boundary between the front surface and the top surface, and a third certain distance portion along the opening planned line from the end point to the top surface are provided with only continuous or discontinuous cut lines penetrating the front and back surfaces; A paper container characterized in that between the first constant distance portion and the second constant distance portion, and between the second constant distance portion and the third constant distance portion, the half cut having a discontinuous shape is provided on the front surface, and the half cut having a continuous shape is provided on the back surface.

2. A paper container as described in claim 1, characterized in that the discontinuous half cut on the front side of the paper base material and the continuous half cut on the back side of the paper base material are offset and positioned in different positions on the front and back along the intended opening line.

3. A paper container as described in claim 1 or claim 2, characterized in that the shape of each notch forming a discontinuous half cut on the surface of the paper base material is L-shaped.

4. It is made of paper and is capable of storing contents inside. Half cuts are made on the front and back of the paper base material along the intended opening line to form an opening at a specified position, When the paper container is made into a box, the surface that will be the outside of the container will be the front surface of the paper base material, and the surface that will be the inside of the container will be the back surface of the paper base material. A paper container having a continuous half cut on a front surface of the paper base material and a discontinuous half cut on a back surface of the paper base material, The opening line is located on the front surface of the formed paper container, and the opening line is located on the top surface of the formed paper container. A first certain distance portion along the intended opening line on the front surface from the starting point is provided with only a discontinuous cut line penetrating the front and back, A second certain distance portion along the opening planned line spanning the front surface and the top surface, including a folding portion which is a boundary between the front surface and the top surface, and a third certain distance portion along the opening planned line from the end point to the top surface are provided with only continuous or discontinuous cut lines penetrating the front and back surfaces; A paper container characterized in that between the first constant distance portion and the second constant distance portion, and between the second constant distance portion and the third constant distance portion, the half cut having a continuous shape is provided on the front surface, and the half cut having a discontinuous shape is provided on the back surface.

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