JPH0320257Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a paper container for liquids, and particularly to a paper container that can be filled at high temperatures.

(Prior art) Generally, when filling and sealing a packaging container with liquid food and drink, the contents consisting of the food and drink are heated and sterilized, and then the packaging container is filled and sealed to ensure long-term storage. There is. In this case, it is desirable to seal the container immediately after filling it in a high temperature state so as to reduce the invasion of bacteria into the container.

(Problem to be solved) However, if the container is sealed at a high temperature, the pressure inside the container will drop as the contents cool down, and if the container is weak, such as a paper container, the pressure will drop and the container will dent. However, there were problems in that the appearance deteriorated and the product value was lost.

(Means for solving the problem) In a liquid paper container including a plurality of side walls and end walls, a recess is formed in advance in a predetermined shape toward the inside of the container on the ridgeline formed by at least two side walls in response to the internal pressure of the container. This paper container for liquid is characterized by having folds formed in a predetermined shape.

(Function) By using the paper container as described above, it is possible to provide a packaging container for liquids that has a high commercial value in appearance and by using a conventional filling and sealing device.

(Example) Hereinafter, the present invention will be explained in detail using a preferred example shown in the drawings.

The present invention consists of a surface material as shown in Figure 1,
Its structure is one in which synthetic resin is laminated on both sides of cardboard, for example, a layered structure of polyethylene/ink/paper/polyethylene/aluminum foil/polystyrene/polyethylene can be used from the outside. This material consists of 5
Panels 1, 2, 3, 4, 5 for the side walls, top panels 6, 7, 8 for the upper end walls, and top panels 6, 7, 8 for the upper end walls at the upper ends of the side panels 1 to 5 through horizontal folds m. Panel 9,
10 are arranged in a row, each separated by a vertical fold l,
Similarly, bottom panels 11, 12, 13 for the lower end wall, a corner panel 14,
15 are arranged in a row, each separated by a vertical fold l,
and the top panel 6, 7, 8, corner ear panel 9,
At the upper end of 10 there is a closure flap 1 through a transverse fold m.
6 to 20 are arranged in a row separated by vertical folds 1, and similarly bottom panels 11, 12, 13, and corner selvage panels 1.
Closing flaps 21 to 25 are also connected to the lower ends of the flaps 4 and 15, separated by vertical folds 1 through horizontal folds o.

Here, the above-mentioned corner ear panels 9, 10 and 1
4 and 15 are provided with diagonal folds p for forming triangular corners.

Furthermore, in the above materials, each side panel 1 to
Two recess-forming folds q are provided around the vertical fold 1 that divides the 5 sections. It is preferable that the upper and lower ends of the pair of creases q for forming a recess are curved toward the longitudinal fold 1 and connected to each other.

Next, as a method for filling and sealing the material shown in Fig. 1 above, a conventionally well-known method, such as the
When high-temperature contents are filled and the upper end wall A is sealed by the method shown in No. 16991, the internal pressure of the container decreases. A recessed portion 30 that is recessed toward the inside of the container along the fold line q is formed on the paper container, and a paper container that has a high commercial value in terms of appearance is obtained.

(Effects) The present invention has the above-mentioned structure, and a recess is provided on the ridgeline of the side wall by a pre-formed fold to withstand the depressurization accompanying filling of high-temperature contents. In addition, the recessed portion provides a good grip for fingers, which is useful when drinking, and provides a paper container for liquid that is excellent in practical terms.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a developed view of a liquid paper container material, and FIG. 2 is a perspective view of the paper container after filling with contents. 1 to 5...Side panel, 6 to 8...Top panel,
9, 10... Panel for corner ears, 11-13... Bottom panel, 14, 15... Panel for corner ears, 16-
20... Closing flap, 21-25... Closing flap, 30... Recessed portion, A... Upper end wall, B... Side wall, l... Vertical fold, m, r, n, o... Horizontal fold. ,
p...Diagonal fold, q...Fold for forming a recess, 30...
...concavity.

Claims (1)

[Scope of utility model registration request] In a liquid paper container including a plurality of side walls and upper and lower end walls, a crease is formed in a predetermined shape to create a recess in a predetermined shape on the ridge line formed by at least two side walls toward the inside of the container in response to the internal pressure of the container. A liquid paper container characterized by being provided with.