JPH0999936A - Blank for packaging container and packaging container obtained from the blank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deformation and stress from being produced in a packaging material by a method wherein the pattern of a fold line of blank is formed so that the fold line conforms to an actual fold line of a final shape of a container, taking into account of thickness of the packaging material formed by forming flaps to prevent the packaging material from extending outward by a distance corresponding to the thickness of folded part. SOLUTION: A blank 1 for packaging a container consists of a plurality of side panels 3 constituting side walls of the container, both end panels, and end panels 4a, b, c forming folded flaps. And an end of a straight line-shaped fold line 7b between the end panel 4b forming a flap to be folded to the side of the end panel and the side panel 3 is offset to the end panel from a straight line-shaped reference fold line 7a between the end panel 4a, which does not form a flap, and the side panel 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blank for a packaging container and a packaging container obtained from the blank. More specifically, the packaging material having a crease line is formed into a tube shape and then formed into a tube shape. A blank for a packaging container that is filled with an object to be filled into the packaging material, is sealed in the transverse direction of the tubular packaging material to form a primary shape, and is folded along the crease line to form the final shape. And a packaging container obtained therefrom.

[0002]

BACKGROUND OF THE INVENTION Packaging containers for milk, juice or other beverages are, for example, formed by folding a wrapping material with a paper / plastic laminate into a tubular shape by longitudinal longitudinal line sealing. The filling material is filled into the molded packaging material, and a horizontal seal is applied in the transverse direction of the tubular packaging material.First, it is molded into a cushion-shaped or pillow-shaped primary shape. Individually cut into intervals and folded along crease lines to form the final shape. The final shape is a brick shape (parallel 6) as shown in FIG. 8 and FIG.
When it is a face body, the upper and lower triangular corner flaps are pressed flat to fold the upper end flap 8c downward to the side wall, and the lower end flap 8b is folded to the bottom to form the final shape. Details of the above-described manufacturing principle and the apparatus for manufacturing the container thereof are described in US Pat. No. 3,325,961 and European Patent 25,235.

The packaging material used in these packaging containers is, as described above, a blank in which a crease line is formed according to the final shape. In this case, a fold line, a fold line, a fold line of a straight line segment corresponding to a corner (corner), and the like are applied to the packaging material. FIG. 7 shows a plan view of a blank of a conventional brick-shaped (parallelepiped) packaging container.

The blank 1 for a packaging container is continuously formed in a transverse direction on a band-shaped packaging material 2 having fold lines. This blank 1 comprises a plurality of side wall panels 3 forming side walls of a container, an end panel 4a forming an end surface, and an end panel 4b forming a flap 8b folded on the end surface.
And an end panel 4c forming a flap 8c which is folded over the side wall. The longitudinal end of this blank is provided with a longitudinal vertical line seal portion 5 formed in a tubular shape,
A horizontal line seal portion 6 is provided which cuts and cuts a horizontal line in the transverse direction of the packaging material.

The blank 1 has a crease line according to the final shape, for example, a linear reference crease line 7a between the end panel 4a forming both end faces and a side wall panel 3 forming side walls of the container, and a flap 8b. Between the end panel 4b forming the side wall of the container and the side wall panel 3 forming the side wall of the container, the linear fold line 7b between the side panel 3 forming the side wall of the container, the flap 8c , Such as the linear folding fold line 7c.

[0006]

However, the conventional folding line pattern of the blank does not consider the thickness of the folded portion of the packaging material by flap formation. For this reason, since the packaging material is made of relatively thick paper or the like, the outer packaging material expands outward by the thickness of the folded portion, and strain, stress, etc. occur in the packaging material. Further, in the case where the final shape is, for example, a hexagonal column shape or an octagonal column shape as described in Japanese Patent Application No. 7-187181, as shown in FIG. The flap is further folded on the top of the container so that the outer packaging material further spreads outward and is distorted and the stress is further increased, and the inner packaging material strongly presses the end surface of the container. In the final shape shown in the above publication, since the flaps are folded on both end surfaces, that is, the upper and lower end surfaces, the flap portion protrudes from the lower end surface to impair the stability when the container is placed, and the flap portions are not It may project from the end face and impair the aesthetic appearance of the container.

Further, since such distortion and stress are generated in the packaging material as described above, wrinkles, twists, dents, twists and tears in the packaging material,
Cracks, pinholes, and scratches may occur. In order to flatten the protruding flap portion, it requires a lot of folding force and it has to be glued to the tight container end face for fixing. On the other hand, conventionally, when the flap is folded on the end face, the end face of the container is curved inward so that the flap does not project, as shown in FIG. That is, in the conventional lower end surface shown in FIG. 9, the end surface formed by the end panel 4a is curved inward with the horizontal line seal portion 6 at the deepest position, and the triangular flank 8b is accommodated in the curved recess. Is folded like.

For a container that is curved inward to form a downwardly bulging bow-shaped fold line at the boundary between the side wall of the container body and the portion of the side wall of the container that forms a triangular flap that folds downward. Blank is proposed (actual fairness 3-
18330 publication). This blank reduces the repulsive force on the triangular flap by bending the side wall in an inward bow shape in horizontal section.

However, this proposal only suggests folding to the side wall, and does not show a solution to the problem in the case of folding to the upper end face and / or the lower end face. Moreover, when a bulging bow-shaped fold line is formed, a relatively wide space is created inside the triangular flap, and beverages such as milk and juice are retained in this space and remain when drinking with a straw or the like. Occurs. Furthermore, when the container is folded into the final shape, a force acts in a direction to strongly cut the bulging bow-shaped fold line, and as a result, folds, tears, cracks, etc. from this fold line or its vicinity. Pinholes, scratches, etc. may occur, which may cause leakage of the filled beverage.

The present invention has been made based on the above-mentioned background, and an object of the present invention is to fold a blank fold line pattern in consideration of the thickness of the folded portion of the packaging material by flap formation. Match the line of sight with the actual fold of the final shape of the container, and even if the wrapping material is made of relatively thick paper, the outer wrapping material does not expand outside by the thickness of the folded part, and there is no strain or stress. It is intended to provide a blank for a packaging container which does not occur in a packaging material, and a packaging container obtained from the blank.

Further, even if the final shape of the container is more complicated and more three-dimensional, such as a hexagonal column shape or an octagonal column shape, in which another flap is folded on the flaps on both end surfaces, that is, the upper and lower end surfaces, the flap portion The present invention provides a blank for a packaging container which does not project from the lower end surface and is excellent in stability when the container is placed, and a packaging container obtained from the blank. Moreover, the flap part protrudes from the container end surface,
(EN) A blank for a packaging container which does not bulge and has an excellent aesthetic appearance of the container, and a packaging container obtained from the blank.

Another object of the present invention is that distortion, stress, etc. due to flap folding do not occur in the packaging material, and wrinkles, twists, dents, twists, tears, cracks, pinholes and scratches on the packaging material may occur. To provide a blank for an empty packaging container and a packaging container obtained therefrom.

One of the objects of the present invention is a blank for a packaging container, which can be easily folded in order to flatten the protruding flap portion, and can be easily adhered to the end face of the container for fixing, It is to provide a packaging container obtained from it.

The object of the present invention is to wrap a flap on the end face so that it can be on the upper end face side visible to the consumer, and the flap does not project from the end face without curving the end face of the container inward. A blank for a container and a packaging container obtained therefrom.

Another object of the present invention is to create a relatively large space inside the triangular flap, which is found in a blank forming a bulging bow-shaped fold line, in which beverages such as milk, juice and the like accumulate. Thus, it is an object of the present invention to provide a blank for a packaging container and a packaging container obtained from the blank, which eliminates the inconvenience of remaining when drinking with a straw or the like and can reduce the useless space inside the flap as much as possible.

[0016]

The above object is achieved by the present invention. That is, the blank for a packaging container according to the present invention forms a packaging material with a crease line into a tube shape, and fills the object to be filled in the packaging material formed into a tube shape, and the transverse direction of the tubular packaging material. A plurality of side wall panels forming the side wall of the container and both ends of the container are horizontally sealed and the packaging material is cut along the horizontal seal portion to form a primary shape and folded along a fold line to form a final shape. A blank for a packaging container comprising a surface and an end panel forming a folded flap, the straight folding fold line between the end panel forming a flap that can be folded toward the end surface and a side wall panel. Of the linear reference fold line between the end panel not forming the flap and the side wall panel is offset to the end panel side from the adjacent line end.

In a preferred embodiment of the present invention, a blank for a packaging container in which flaps that are bent toward the end face are further folded on adjacent flaps, and end panels and side walls that form flaps that are folded toward the upper side. The line end of the linear second fold fold line between the panel and the panel is further further than the adjacent line end of the linear first fold fold line between the end panel forming the flap to be folded downward and the side wall panel. It can be attached at an offset position.

In the packaging container according to the present invention, a packaging material having a crease line is formed into a tube shape, and a filling material is filled in the packaging material formed into the tube shape to cross the tubular packaging material. A packaging container in which a horizontal line seal is applied in a direction and the packaging material is cut along a horizontal line seal portion to form a primary shape, and the packaging material is folded along a fold line into a final shape, wherein the packaging material is a container. An end that forms a flap that is folded toward the end face, including a blank with linear fold lines that define a plurality of side wall panels that form the sidewalls and end panels that form the end faces and folded flaps. Part of the linear folding fold line between the side panel and the side wall panel is closer to the end panel side than the adjacent line end of the straight reference fold line between the end panel that does not form the flap and the side wall panel. It is also characterized by being biased It is.

[0019]

The blank for a packaging container according to the present invention and the packaging container obtained from the blank having the above-described structure operate and operate as follows. The packaging material according to the present invention includes:
The folds, folds, corners (corners), and the like of the final shape of the packaging material are provided with folds of substantially linear line segments.

The packaging material having the crease lines is first formed into a tubular shape by a longitudinal vertical line seal. For example,
When a strip-shaped packaging material is used, the strip-shaped packaging material is formed into a tube shape in a longitudinal direction in a sterile atmosphere, and both ends of the packaging material are welded to perform vertical line sealing. Fill the tube-shaped packaging material with the liquid food so that the tip of the filling nozzle is always below the liquid level of the liquid food in the packaging material. After applying a seal, the horizontal line seal part or
The space between adjacent horizontal line seals is cut to obtain individual filled and packaged liquid foods (packaging containers). In this way, it is formed into a primary shape. This primary shape is a simpler shape than the final shape, and generally, as a whole, sofas, cushions,
It is a pillow shape or a preliminary shape for the final shape.

Next, it is folded and folded along the crease lines to form the final shape. When forming from this primary shape to the final shape, the line end of the linear fold line between the side panel and the end panel that forms the flap that is bent toward the end face is the end panel that does not form the flap and the side wall. The straight reference crease line between the panel and the end panel side from the adjacent line end is offset considering the thickness of the folded part of the packaging material by wrapping, so the blank crease line and the container final Match the actual crease of the shape.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described. The packaging material that can be used in the present invention is usually a packaging material for a paper container using a paper base material, which is a thermoplastic resin, for example, a paper material in which a thin layer of polyethylene is laminated on both sides. , An outer polyethylene layer on one side of the paper base layer, an oxygen barrier aluminum foil layer sandwiching laminated polyethylene on the other side, an inner polyethylene layer on the inner side of the aluminum foil layer, and an inner polyethylene layer on the inner side. It is composed of two layers, and the food contact surface is polyethylene. Further, a band-shaped fragrance retaining paper base packaging material having a polyester layer on at least one surface can also be used. Here, the polyester is provided on both surfaces or one surface of the packaging material, and is a homopolymer of polyethylene terephthalate or a copolymer of ethylene terephthalate and another monomer, for example, amorphous. It is a polyester resin (A-PET), and the degree of polymerization, the average molecular weight, the types of other monomers, additives, etc. can be appropriately changed and selected according to the application etc. A-PET layer / Adhesive resin / Aluminum foil / LD
PE / paper layer / LDPE.

The final shape of this container is a prismatic shape, preferably a polygonal pillar shape exceeding a square, a hexagonal pillar shape, an octagonal pillar shape, a decagonal pillar shape, and a tetrahedron shape having four triangular surfaces. , A rectangular parallelepiped brick shape having six rectangular surfaces may be used.

In the present invention, the packaging container blank is
It consists of a plurality of side wall panels forming the side walls of the container and end panels forming both end faces and folded flaps. The side wall panel and the end panel each have a fold line, and the side wall panel and the end panel are integrated along a linear fold line.

In the present invention, the line end of the linear folding fold line between the end panel forming the flap that can be bent toward the end face and the side wall panel is between the end panel not forming the flap and the side wall panel. Of the linear reference fold line of (1) is offset to the end panel side from the adjacent line end. The amount of this deviation can be appropriately changed and selected depending on the thickness of the packaging material, the shape of the flaps to be folded, the number of flaps, and the like.

In a preferred embodiment of the invention, the straight line between the end panel and the side wall panel forming the flap that is folded upwards when the flaps that are folded towards the end face are further folded on adjacent flaps. The line end of the second linear fold line is offset further from the adjacent line end of the linear first fold line between the end panel forming the flap to be folded downward and the side wall panel. You can

The above-mentioned folding fold lines relate to the flaps that can be bent to the end surface. Regarding the flaps that can be bent to the side wall of the container, the end panel and the side wall panel that form the flap that can be bent to the side wall of the container can be used. The line end of the linear folding fold line between the two can be offset to the side wall panel side from the adjacent line end of the linear reference fold line between the end panel not forming the flap and the side wall panel.
The offset amount of the line end of the folding fold line can be appropriately changed and selected according to the thickness of the packaging material, the number of flaps that can be folded, the type of packaging container, and the like. This offset amount may be the same at both line ends, or may be different at both line ends. Due to the different amount of biasing at both line ends,
It is possible to deal with unevenness on the end face side. Furthermore, an auxiliary fold line can be provided on the end face side and / or the side wall side of the fold line.

[0028]

EXAMPLES The present invention will be specifically described with reference to the following examples. FIG. 1 shows a front view of an embodiment of a packaging container blank according to the present invention. FIG. 2 is an enlarged view of a portion A of the blank shown in FIG. 1, and shows a perspective view of the molded brick-shaped final shape container in FIG. 8.

The blank 1 of this embodiment has a fold line (see FIG.
Is a solid line, and the adjacent fold line is shown by a dotted line). The blank 1 for a packaging container is continuously formed in a transverse direction on a band-shaped packaging material 2 having fold lines. This blank 1 comprises a plurality of side wall panels 3 forming side walls of a container and an end panel 4a forming end faces.
And an end panel 4b forming a flap 8b folded on the end face and an end panel 4c forming a flap 8c folded on the side wall. At the long edge of this blank,
A longitudinal vertical line seal portion 5 formed in a tubular shape is provided, and a horizontal line seal portion 6 for performing horizontal line sealing and cutting is provided in the transverse direction of the packaging material.

The blank 1 has various crease lines according to the final shape, for example, a linear reference crease line 7a between the end panel 4a forming both end faces and the side wall panel 3 forming side walls of the container, Linear folding fold line 7b between the end panel 4b forming the flap 8b and the side wall panel 3 forming the side wall of the container, end panel 4c forming the flap 8c
And a linear fold line 7c between the side wall panel 3 forming the side wall of the container and the like.

In the embodiment of this embodiment, as will be understood from FIG. 2 which is an enlarged view of the portion A of the blank shown in FIG. 1, an end panel 4b forming a flap 8b which can be bent toward the end face side is formed. The line end 10b of the linear folding fold line 7b between the side wall panel 3 and the linear reference fold line 7 between the side wall panel 3 and the end panel 4a that does not form a flap.
It is offset by d from the adjacent line end 10a of a toward the end panel. This offset amount d can be appropriately changed and selected depending on the thickness of the packaging material, the shape of the flaps to be folded, the number of flaps, and the like. In this embodiment, with respect to the flap 8c that is bent toward the container side wall, the linear folding fold line 7c between the end panel 4c and the side wall panel 3 that forms the flap 8c that is bent toward the container side wall is the flap. It is offset to the side wall panel 3 side from the linear reference fold line 7a between the end panel 4a not formed and the side wall panel 3.

FIG. 3 shows another embodiment. FIG. 3 shows a front view of an embodiment of a blank for a packaging container according to the present invention. FIG. 4 is an enlarged view of a portion B of the blank shown in FIG. 3, and FIG. 5 is an enlarged view of a portion C of the blank shown in FIG. Figure 3 shows a perspective view of the final shaped container. The blank 1 of this example is
It is a packaging material having a fold line (illustrated by a solid line in the figure). This packaging container blank 1 includes a plurality of side wall panels 3 forming the side walls of the container and an end panel 4a forming an end face.
And an end panel 4b forming flaps 8b1 and 8b2 folded to the end faces. The longitudinal end of the blank is provided with a longitudinal vertical line seal portion formed in a tubular shape, and a horizontal line seal portion for performing horizontal line seal and cutting in the transverse direction of the packaging material.

The blank 1 has various crease lines according to the final shape, for example, a linear reference crease line 7a between the end panel 4a forming both end faces and the side wall panel 3 forming side walls of the container, A linear fold fold line 7b is provided between the end panel 4b forming the flap 8b and the side wall panel 3 forming the side wall of the container. In this embodiment, as can be seen from FIG. 4, which is an enlarged view of the portion B of the blank shown in FIG. 3, the flap 8b2 bent toward the end face side is further folded onto the adjacent flap 8b1. It is a blank.

A second straight line between the end panel 4b and the side wall panel 3 forming a flap 8b2 that folds up.
The line end 10b2 of the folding fold line 7b2 is further offset from the adjacent linear end 10b1 of the linear first fold fold line 7b1 between the end panel 4b forming the flap 8b1 folded downward and the side wall panel 3. It is attached to the position.
Line ends 10b1 and 10b2 of the linear folding fold line 7b
Are offset from the line end 10a of the linear reference fold line 7a by d1 and d2 to the end panel side. This offset amount d can be appropriately changed and selected depending on the thickness of the packaging material, the shape of the flaps to be folded, the number of flaps, and the like. In this embodiment, the flaps at both ends are bent toward the end face.

FIG. 5, which is an enlarged view of the portion indicated by C of the blank shown in FIG. 3, shows another biasing mode. In this embodiment, similarly, the linear second portion between the end panel 4b and the side wall panel 3 forming the flap 8b2 that is folded upward is formed.
The line end 10b2 of the folding fold line 7b2 is further offset from the adjacent linear end 10b3 of the linear first fold fold line 7b1 between the end panel 4b forming the flap 8b1 folded downward and the side wall panel 3. It is attached to the position.
However, unlike the above, the flap 8 that is folded down
The linear first fold line 7b1 between the end panel 4b forming the b1 and the side wall panel 3 is the linear reference fold line 7
It is not provided in parallel with a, but is provided obliquely. Line end 10b1 and line end 1 of the linear first folding fold line 7b1
0b3 is not the same offset amount.

If necessary, as shown in FIG. 6, an auxiliary fold line 7c can be provided on the end face side and / or the side wall side of the folding fold line.

[0037]

According to the present invention demonstrated in the above embodiment, the following effects can be obtained. According to the present invention, the pattern of the fold line of the blank is made to coincide with the fold line of the blank and the actual fold of the container final shape in consideration of the thickness of the folded portion of the packaging material by flap formation, and the packaging material is relatively thick. Even if the outer packaging material is made of, for example, the outer packaging material does not expand outward by the thickness of the folded portion, and the packaging material is not distorted or stressed.

Even if the final shape of the container is more complicated and more three-dimensional, such as a hexagonal column shape or an octagonal column shape, in which another flap is folded on the flaps on both end surfaces, the flap portion should not protrude from the lower end surface. It has excellent stability when placed on a container. Moreover, the flap portion does not project or bulge from the end face of the container, and the aesthetic appearance of the container is excellent.

Strain, stress, etc. due to flap folding do not occur in the packaging material, and wrinkles, twists, dents, twists, tears in the packaging material,
There is no risk of cracks, pinholes and scratches.

Since the protruding flap portion is flattened, it can be easily folded and can be easily adhered to the end surface of the container for fixing.

When the flap is folded on the end face, it can be on the upper end face side as seen by the consumer, and the flap does not protrude from the end face without curving the end face of the container inward.

The useless space inside the flap can be made as narrow as possible.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a blank for packaging containers according to the present invention.

FIG. 2 is an enlarged view of a portion indicated by A of the blank shown in FIG.

FIG. 3 is a front view of another embodiment of the packaging container blank according to the present invention.

FIG. 4 is an enlarged view of a portion indicated by B of the blank shown in FIG.

FIG. 5 is an enlarged view of a portion indicated by C of the blank shown in FIG.

FIG. 6 is a partial surface view of another embodiment of the packaging container blank according to the present invention.

FIG. 7 is a front view of a conventional blank for a packaging container.

FIG. 8 shows a perspective view of a brick-shaped container.

FIG. 9 shows a perspective view of an inverted brick-shaped container.

FIG. 109 shows a perspective view of an octagonal column-shaped container.

[Explanation of symbols]

 1 blank 2 packaging material 3 side wall panel 4a, b, c end panel 5 vertical line seal part 6 horizontal line seal part 7a, b, c fold line 8 flap

Claims (4)

[Claims] 1. A fold-wrapped packaging material is formed into a tube shape, an object to be filled is filled in the tube-shaped packaging material, and a horizontal line seal is provided in the transverse direction of the tubular packaging material. Cutting the packaging material along the horizontal line seal portion to form a primary shape, and folding along a fold line to form a final shape,
A blank for a packaging container comprising a plurality of side wall panels forming a side wall of a container and end panels forming both end surfaces and a folded flap, the end panel forming a flap bendable to the end surface side. Of the linear folding fold line between the side panel and the side wall panel is offset toward the end panel side from the adjacent line end of the linear reference fold line between the end panel that does not form the flap and the side wall panel. A blank for a packaging container characterized in that 2. A blank as claimed in claim 1 for a packaging container, wherein the flaps which are folded towards the end face are further folded onto adjacent flaps, the end panels and side walls forming flaps which are folded upwards. The line end of the linear second fold fold line between the panel and the side panel of the linear first fold fold line between the end panel forming the flap to be folded downward and the side wall panel is further The blank for a packaging container according to claim 1, which is attached to an offset position. 3. The straight folding fold line between the end panel and the side wall panel forming the flap that is bent toward the side wall of the container has a line end between the end panel and the side wall panel that do not form the flap. The packaging container blank according to claim 1, wherein the straight reference fold line is offset toward the side wall panel side from the adjacent line ends. 4. A packaging material having a crease line formed into a tubular shape, the filling material is filled in the packaging material formed into a tubular shape, and a horizontal line seal is provided in a transverse direction of the tubular packaging material. A packaging container in which the packaging material is cut along a horizontal line seal portion to be molded into a primary shape and folded along a fold line to be molded into a final shape, wherein the packaging material forms side walls of the container. A end panel and a side wall panel that include a blank with linear fold lines defining the panel and both end surfaces and the end panel that forms the folded flap; The line end of the linear folding fold line between is characterized in that it is offset toward the end panel side from the adjacent line end of the linear reference fold line between the end panel not forming the flap and the side wall panel. Packaging container to do.