JP2598093Y2 - Liquid paper container - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat-top liquid paper container used for fruit drinks, milk, sake, toiletries and the like.

[0002]

2. Description of the Related Art In recent years, liquid paper containers have replaced conventional glass containers and metal containers, and have been used for a long time, such as milk, lactic acid bacteria drinks, liquid foods such as chilled circulation type liquid soups, sake, fruit juice drinks, and mentsuyu. It has come to be used in large quantities over a wide range, such as room temperature liquid foods that require storage. More recently, it has also been used in non-food sectors such as toiletries. As an example of a conventional representative blank plate used in a box for a liquid paper container having a flat top according to the present invention among these liquid paper containers, as shown in a developed plan view of FIG.
Horizontally, five rectangular seal panels (211),
The left side panel (212), the front panel (213), the right side panel (214), and the back panel (215) are sequentially connected in parallel via four vertical fold lines (231, 232, 233, 234). The five panels also have three horizontal fold lines (241, 24) in the vertical direction.
2, 243), the upper end seal part (221), the top part (222), the side wall part (223), and the bottom part (224) are sequentially arranged in parallel from the top, and the bottom part of the left and right side panels and the bottom part of the front panel. , A lower end seal portion (225) is provided through a horizontal fold line (244) and two vertical fold lines (263, 264), and at the top of the left and right side panels,
For the folding, two oblique fold lines (251) intersecting with the lower ends of the vertical fold lines (261, 262) of the upper end seal portion in an isosceles triangular shape whose bottom is a ridge connecting the left and right corners at the lower end of the top. And 252, 253 and 254) are provided at the bottom of the left and right side wall panels, and a fold line perpendicular to the lower end seal portion in an isosceles triangular shape whose bottom is a ridge connecting the left and right corners at the upper end of the bottom. (26
3,264) and two oblique fold lines (2
55, 256, 257 and 258), and the fold lines used were usually of the same width.

[0003]

However, the laminated material used for the blank plate of the liquid paper container has a polyethylene / paperboard / polyethylene constitution even in a relatively simple chilled distribution type, and a polyethylene / paperboard / polyethylene constitution in a room temperature distribution type.
Paperboard / Aluminum foil / Polyethylene terephthalate /
Polyethylene construction and multilayer laminated material are used,
On the filling machine line, when the left and right triangular ears at the top of the container in the box making process are bent downward and attached to the side wall of the side panel, a pinhole is placed on the vertical fold line at the top of the container of the blank plate. And cracks may occur.

[0004] The present invention is based on the conventional liquid paper container described above.
This solves the problem in the box making process.
Bend the right triangular ear down to the side wall of the side panel
Pin holes or cracks at the top fold line
It is intended to provide a liquid paper container in which the occurrence of liquid is difficult.

[0005]

SUMMARY OF THE INVENTION The present invention relates to FIGS.
Lower the triangular ears protruding from both ends of the top as shown in
In a rectangular liquid paper container having a flat top , and folded at the top, a vertical fold line of the top seal portion (121) of the blank plate (100) and the top (122) of the container. (131a, 132a, 133a, 13
A liquid paper container (300) characterized in that 4a) is formed wider than the fold line of the other part and the blank plate is folded into a container shape.

[0006] To form wider than the fold line of the other portion depends on the laminated material of the blank plate to be used.
It is preferably at least 1.5 times the width of the other fold line.

[0007]

When a box is made using a blank plate relating to the liquid paper container of the present invention, the vertical fold line at the top of the container is wider than other fold lines, so the fold for closing and sealing the top is closed. Sometimes, as shown in FIG. 3, even if the triangular ears (171 and 172) protruding from both ends of the top are bent downward and adhered to the side wall, there is a margin in the overlapping portion of the laminated material. Since it is made, it is easy to fold, and it is possible to prevent pinholes and cracks which are easily generated at the bent portion of the constituent material layer of the laminated material.

[0008]

EXAMPLE First, a blank plate for boxing the liquid paper container of this example was prepared. FIG. 1 is an exploded plan view of the blank plate. In the horizontal direction, five rectangular seal panels (111), a left side panel (112), a front panel (113), a right side panel (114), and a back panel are shown. (115) is a part of the upper end seal part (121) and the top part (122) according to the present invention having a width of 1.4 mm and a side wall part (12).
3) and the bottom portion (124) are connected in parallel in succession via four continuous vertical fold lines (131a and 131, 132a and 132, 133a and 133, 134a and 134) having a width of 0.7 mm. The five panels also have three 0.7 mm wide horizontal fold lines (14
1, 142, 143) at the upper end seal portion (12).
1), top (122), side wall (123), bottom (12
4) are sequentially arranged in parallel from the top, and a horizontal fold line (144) of 0.7 mm width and two vertical fold lines (0.7 mm width) are provided at the bottom of the left and right side panels and the front panel. 1
63, 164), and a 0.7 mm wide vertical fold line (161, 162) is provided at the center of each of the upper end seals of the left and right side panels.
At the tops of the left and right side panels, the vertical fold lines (161, 162) of the upper end seal portion are formed in an isosceles triangular shape whose bottom is a ridge connecting the left and right corners at the lower end of the top for folding. Two diagonal 0.7 crossing the bottom
mm width fold line (151 and 152, 153 and 154)
Further, on the bottom of the left and right side panels, a vertical fold line (163, 163) of the lower end seal portion is formed in an isosceles triangle with a ridge connecting the left and right corners at the upper end of the bottom as a base.
164) are provided with two diagonally 0.7 mm wide fold lines (155 and 156, 157 and 158) intersecting the upper end of the fold line.

The construction of the laminated material of the blank plate used in the present embodiment is [outside] polyethylene (20 μm) / paper (34
0 g / m ² ) / aluminum foil (7 μm) / polyethylene terephthalate (12 μm) / polyethylene (60 μm)
m) [Inside], with characters and patterns printed on the surface by gravure printing.

Next, the blank side-sealed by the frame sealer is passed through a filling machine, and the bottom is heat-sealed.
After filling with water for the test, the top is heat-sealed and sealed, and the room temperature flow type liquid paper container (300) of the present invention having a flat top as shown in FIG. ) Was prepared.

In the above-described box making process of the present embodiment, after the upper end seal portion of the top portion is heat-sealed, as shown in FIGS. 3A and 3B, triangular ear portions projecting from both ends of the top portion. Even if (171 and 172) are bent downward and affixed to the side wall, the fold line (131)
a, 132a, 133a, 134a) did not produce pinholes or cracks. In particular, no pinholes or cracks were observed in the P portion, which was liable to occur in the past.

[0012]

[Effect of the Invention] The liquid paper container of the present invention, which is boxed using the blank plate according to the present invention, is placed on the filling machine line at the left and right of the container top in the box making process, as described in the section of the embodiment. When the triangular ear is bent downward and attached to the side wall of the side panel, no pinholes or cracks are observed on the vertical fold line at the top of the blank plate container, and the conventional liquid paper container In comparison, it was confirmed that the occurrence of pinholes and cracks on the crease line at the top during box making was small.

[Brief description of the drawings]

FIG. 1 is a developed plan view of a blank plate of a liquid paper container according to the present invention.

FIG. 2 is a developed plan view of a blank plate of a conventional liquid paper container.

FIG. 3 is an explanatory view showing a closed state of a top portion of the liquid paper container at the time of box making.

[Explanation of symbols]

100, 200… Blank plate 111, 211… Seal panel 112, 212… Left side panel 113, 213… Front panel 114, 214… Right side panel 115, 215… Back panel 121, 221… Top Seal portions 122, 222 ... Top portions 123, 223 ... Side wall portions 124, 224 ... Bottom portions 125, 225 ... Lower end seal portions 131, 132, 133, 134, 141, 142, 1
43,151,152,153,154,155,15
6,157,158,161,162,163,16
4,231,232,233,234,241,24
2,243,251,252,253,254,25
5,256,257,258,261,262,26
3,164 ... fold line 131a, 132a, 133a, 134a ... wide fold line 171,172 ... triangular ear-shaped part 300 ... liquid paper container

Claims (1)

(57) [Scope of request for utility model registration] 1. Triangular ears projecting from both ends of the top
In a rectangular liquid paper container that is bent and attached to the side wall portion and has a flat top, the four vertical fold lines of the upper seal portion of the blank plate and the top of the container are wider than the fold lines of the other portions. And the blank plate is folded into a container shape.