JP2012166802A - Paper cup or paper container, having curled part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper cup or a paper container which uses thin paper and can have a curled part constituted at a peripheral edge of an opening.SOLUTION: In the paper container or the paper cup having the curled part, a folded-in part is provided at the peripheral edge of the opening of the paper container or the paper cup which has an opening provided at least at one surface and is formed of the thin paper, and the curled part is constituted in the folded-in part.

Description

  The present invention relates to a paper cup or container in which thin paper can be used in particular, and relates to a paper cup or paper container having a curled portion at the periphery of an opening.

The peripheral edge of the opening portion of a conventional paper cup or paper container has a curl portion so as to increase the strength of the opening portion of the cup or container so as not to be crushed by deformation.
The outer periphery of the circular opening is firmly formed by having a curled portion at the peripheral edge of the outer peripheral edge of the opening of the cup or container, for example, even when the contents such as drinking water are put in the cup or container, The opening is firmly circular and is formed with strength as a container.

Other than cups, for example, ice cream containers and containers for storing various products are also used.
Therefore, in order to increase the strength of the container itself by increasing the strength of the opening, cups and containers provided with a curled portion at the peripheral edge of the opening are often used.

JP 2010-269798 A JP 2010-42869 JP 2010-30658

As described above, the provision of the curled portion at the outer peripheral edge of the opening in a paper container or paper cup is based on the premise that the contents with a certain weight or more are put in the container. Also, cardboard is used.
Therefore, the curled portion can be formed because of the thick paper.

Generally, paper having a basis weight of 200 g / square meter or a basis weight of 300 g / square meter or more is used.
However, if the strength of the container can be increased without using such thick paper, a container using thin paper or a container that does not deform even when contents with a certain level of weight can be formed can be established. It is.

  In this case, in order to provide the curl portion, the curl portion cannot be formed accurately unless paper thicker than at least 120 g / square meter is used. It becomes something that cannot be done.

That is, the paper is too thin to maintain the curl shape, and even if the paper is curled, the paper is too thin to be fragile and easily deformed.
Therefore, in a thin container using paper, a cup or container using a curled part cannot be molded.

On the other hand, containers and cups using thin paper have many uses and are used in various situations, and the cost can be significantly reduced compared to using thick paper. Therefore, it is desired to provide a more rigid cup or container by increasing the molding strength of a container or cup using thin paper.
In particular, containers or cups that can store contents with a certain weight or more can be molded with thin paper, for example, small paper cups for drinking water and various types that can store things and other things in a cream form without deformation Although it has been difficult to provide a container with thin paper, it has been extremely demanded.

In order to solve the problem, the invention according to claim 1 has a folding portion at the peripheral edge of the opening of a paper container or paper cup made of thin paper having an opening on at least one surface, and the folding portion includes Can provide a paper container or a paper cup having a curled portion by forming the curled portion, and the above-mentioned problems can be solved by the invention.
Alternatively, a paper container or a paper cup having a curled portion made of paper having a thickness of about 120 g / square meter or less as in the invention according to claim 2 may be used.
Further, in these cases, as in the invention according to claim 3, the folded portion may be a paper container or a paper cup having a curled portion bonded to the peripheral edge portion with an adhesive member.

  Further, as in the invention according to claim 4, a paper container having a curled portion comprising a folded portion in which the peripheral edge portion is doubled by folding the peripheral edge portion of the opening, and the curled portion is formed by curling the folded portion. Alternatively, a paper cup, or a folded portion in which the peripheral portion is formed into a triple layer by folding the peripheral portion of the opening multiple times as in the invention according to claim 5, the curled portion is formed by curling the folded portion. It may be a paper container or a paper cup having the curled portion formed.

  In these cases, as in the invention according to claim 6, one end side portion of the paper sheet is folded in advance to form a folded portion, and the folded portion is curled to form a curled portion. Even in a paper container or a paper cup having a curled portion formed by forming a paper container or a paper cup using a sheet, as in the invention according to claim 7, the one end side portion of the paper sheet is folded in advance and the folded portion A paper container or paper cup having a curled portion formed by forming a curled portion by forming a curled portion by forming a paper container or a paper cup using a paper sheet having the folded portion May be used.

  In addition to these, as in the invention according to claim 8, at least one side of the paper container or paper cup having an opening is folded at the periphery of the opening to form a fold, and the curl is further curled. You may use the paper container or paper cup which has the curl part which formed the part.

Since it comprised as mentioned above, the curl part of the opening part of a paper cup or a paper container can be comprised by the thickness more than double of the thickness of sheet ground itself, and a firm curl part can be formed. Is.
Accordingly, the weakest opening of the paper cup or paper container can be reinforced by the curl portion having higher strength, and a strong paper cup or paper container can be manufactured.
In particular, with regard to a paper cup or paper container using thin paper, the curled portion could not be formed because the paper was originally thin, but the curled portion can be formed at the opening by making it double thickness. It is possible.

This is a thin paper that is extremely low in strength and used a paper cup or paper container that is supposed to be deformed because the curl portion could not be formed even in the opening to increase the strength. It had only the intended use according to it.
However, even a paper cup or paper container made of thin paper can form a curled portion having strength at the opening, so that a paper cup or paper container molded with strong thin paper can be provided. It has become.

Therefore, a thin paper cup or container that could not be used in the past can be used in a wider range, and can be used especially for storing liquid or heavy contents.
Furthermore, because it is thin paper, it can be formed at low cost and can be easily formed, and a paper cup or container with useful strength can be manufactured and provided without cost. .

Next, according to the second aspect of the present invention, the curled portion can be formed also in a paper cup or container using paper having a thickness of about 120 g / square meter or less, which has not been able to form the curled portion.
Further, according to the invention of claim 3, the folded portion is bonded with an adhesive member, and the strength of the folded portion can be increased by the bonding, and a stronger and firm curled portion can be formed.

Therefore, the strength of the paper cup or container can be increased, and it becomes possible to provide a cup or container that is not easily deformed even when a heavier item is added.
In addition, the curled portion itself can be formed even when thinner paper is used.
Next, the double fold of the invention according to claim 4 or the triple fold or more of the invention according to claim 5 may have any number of folds, and if necessary, paper quality, etc. Depending on the situation, arbitrary folding can be performed, whereby various types of thin paper can be appropriately curled, and a curled portion having a required strength can be formed depending on the application.

Further, as in the inventions described in claims 6 to 8, a paper container or a paper cup having a curled portion can be manufactured through a process corresponding to each.
Therefore, the curled portion may be formed after folding the paper sheet, or the curled portion may be formed after being formed into a cup shape, etc. A fold may be formed after molding.
Therefore, according to each, the paper container or paper cup which has a curl part can be manufactured with a required process.

The figure which shows an example of the paper container or paper cup which has the curl part which concerns on this invention The figure which shows sectional drawing of the paper cup shown in FIG. The figure which shows an example of the manufacture process of the paper cup shown in FIG. The figure which shows an example of the manufacture process of the paper cup shown in FIG. The figure which shows another example of the manufacturing process of the paper container or paper cup which has the curl part which concerns on this invention The figure which shows another example of the manufacturing process of the paper container or paper cup which has the curl part which concerns on this invention The figure which shows another example of the paper container or paper cup which has the curl part which concerns on this invention The figure which shows another example of the manufacturing process of the paper container or paper cup which has the curl part which concerns on this invention The figure which shows another example of the manufacturing process of the paper container or paper cup which has the curl part which concerns on this invention The figure which shows another example of the manufacturing process of the paper container or paper cup which has the curl part which concerns on this invention The figure which shows another example of the paper container or paper cup which has the curl part which concerns on this invention

An example of a paper cup showing the basic configuration according to the present invention is shown in FIG.
A paper cup 1 shown in the figure is a paper cup having a curled portion 11 using kraft paper having a basis weight of 60 g / square meter.
As shown in the figure, a curled portion 11 is provided at the outer peripheral edge of the opening of the paper cup 1, and this portion is folded by an adhesive member by folding the outer peripheral edge of the opening of the paper cup. This is a paper cup in which the curled part 11 is formed by winding the part after bonding the part.

By configuring in this way, the curled portion 11 is composed of kraft paper having a basis weight of at least 60 g / square meter, and not only the thickness becomes a thickness of 120 g / square meter but also adhered by an adhesive member. Therefore, it also has additional strength due to adhesion of the adhesive member.
Thus, even a cup using thin paper can be configured with the curled portion 11 at the outer peripheral edge of the opening of the paper cup, and the curled portion 11 can prevent the cup itself from being deformed. It is possible to provide a paper cup having strength using paper.

By this curled portion 11, at least the opening portion of the cup can maintain a circular shape. For example, it is possible to provide a cup having a very high shape retaining property and capable of containing drinking water or the like.
In particular, it is possible to provide an optimal cup for a tasting cup or the like in which a heavy liquid can be put.
In this figure, the adhesive member 2 is used to bond the folded portion of the peripheral edge of the opening of the paper cup. However, the present invention is not limited to this. For example, the basis weight is 70 g / sq.m. Of course, the kraft paper may be simply folded into two and then formed into the curled portion 11.
Of course, when paper having a basis weight of 120 g / square meter is used, it may of course be formed into the curled portion 11 after being folded twice in order to increase the strength.

FIG. 2 shows a cross-sectional view of the paper cup shown in FIG.
As shown in this figure, the opening portion of the cup is formed by folding the peripheral portion into a double layer, and further adhering with an adhesive portion to form a curled portion.
With such a configuration, the curled portion 11 can be molded in a state where the paper of the curled portion 11 is made thick and strong.
For the sake of explanation, the paper cup is clearly shown, but the paper container may be constructed in this way.
Further, although the opening is cylindrical, it may be oval or may be used for a container having a multi-angled opening having corners.

3 and 4 are cross-sectional views of the paper cup or paper container according to the present invention showing an example of the procedure for forming the paper cup shown in FIG.
First, the peripheral edge of the opening of the cylindrical cup 1 is folded.
At the time of folding, an adhesive member 2 is applied to bond the folded portion.
Further, as shown in FIG. 4, the bent peripheral portion is curled to form a curled portion 11.
In this manner, a thin paper container having a curled portion 11 can be molded while being very easily molded.

1 to 4 illustrate that the curled portion is created by folding the cylindrical peripheral edge of the opening for the sake of explanation, and not only by this method but also by folding one end side of the sheet base. Then, it may be manufactured by first forming a sheet material having a folded portion in part and then forming the sheet material into a cup shape using the sheet material.
Of course, in the manufacturing process, it is most easily possible to take a manufacturing process by folding the sheet material.
However, for example, it is possible to fold the cup-shaped opening periphery with pressure using, for example, male and female molding machines.

Further, regarding the curled portion, either a cup portion formed in advance after forming the curled portion in the folded portion of the sheet-like sheet base, or a curled portion formed after forming into a cup shape may be used. .
FIG. 5 is a diagram showing an example of a sheet base in the case where a cup is formed by forming a folding portion in advance in a paper sheet base in the forming stage of the paper cup or paper container of the present invention.
That is, in the stage before being molded into the cup shape of the example shown in FIGS. 1 to 4, first, one end portion of the thin paper is folded, and the folded portion is further bonded by an adhesive member, and the folded portion is bonded by the bonded portion. Constructs a thin paper sheet.

Further, as shown in FIG. 6, the folded portion is curled to form a sheet base having a curled portion 11 on one end side of a thin paper sheet.
It may be formed into a cup shape by rounding into a cup shape using the paper sheet formed in this way.
Alternatively, a cup may be formed in advance from the configuration shown in FIG.
For example, it may be formed in a curled shape by a male mold and a female mold.
Next, FIG. 7 is a cross-sectional view of an example in which the curled portion is formed by folding the folded portion without using an adhesive member and then curling the folded portion further.
Even in this case, the curled portion can be formed since the strength can be increased by increasing the thickness by folding.

FIG. 8 is a view showing a state in which not only the peripheral portion of the opening portion is doubled by folding but also a single folding is performed, and folding is performed in total to form a folded portion, and the curled portion 11 is formed. It is a figure which shows an example of the previous step.
In the case shown in the figure, a configuration in which the adhesive member 2 is used for adhesion is shown. However, the present invention is not limited to this, and any of them may be used by curling only by folding without using the adhesive member.
In this way, if triple paper is formed using, for example, kraft paper having a basis weight of 60 g / sq.m., The thickness becomes the same as that of paper having a basis weight of about 180 g / sq.m. If the member 2 is used, it becomes equivalent to paper having a greater thickness and strength.

Therefore, the curl portion 11 having higher strength can be formed.
At the same time, for example, even when using thin paper with a basis weight of 40 g / square meter, which is thinner than kraft paper with a basis weight of 60 g / sq.m. If the adhesive member is used, the strength can be further increased and the curled portion can be sufficiently formed.
Therefore, by increasing the number of folds or using an adhesive member, the curled portion can be molded even with extremely thin paper, and the curled portion itself has sufficient strength. It can be molded.

In addition, although it demonstrates as a kraft paper on this specification, it is not limited to a kraft paper from the first, either a high quality paper may be used, or it may be what uses various other uses.
It is sufficient to use at least paper, and refers to a paper cup or paper container in which thin paper can be used.
This mainly shows thin paper, but does not exclude thick paper.
Furthermore, it is for molding a paper cup or a paper container, and the paper includes a multilayer paper sheet with a resin sheet or the like.

FIG. 9 shows an example in which the curled portion 11 is formed by curling the folded portion using the triple folded portion shown in FIG.
By configuring in this way, the curled portion 11 can be formed even using thin paper. Since the curled portion 11 can be molded with strength, the strength of the cup or the entire container is increased, and the shape retaining property is high. It is possible to provide a strong container.
FIG. 10 is a diagram illustrating an example in which folding is performed not on the outside of the cup opening but on the inside.
FIGS. 1 to 9 show examples in which the folding part is formed by folding the opening part outside, but the invention is not limited to this, and the folding part may be formed by folding the folding part inside.
Further, as shown in FIG. 11, the folded portion can be curled to form the curled portion 11, and it may of course be formed in this way.

1 Sheet material 11 Curled part 2 Adhesive member

Claims (8)

The paper container or paper cup made of thin paper having an opening on at least one surface has a folding portion at the peripheral edge of the opening, and the curling portion 11 is formed in the folding portion. Paper container or paper cup. The paper container or paper cup having a curled portion according to claim 1, wherein the thin paper is made of paper having a thickness of at least about 120 g / square meter. The paper container or paper cup having a curled portion according to any one of claims 1 and 2, wherein the folded portion is bonded to the peripheral edge portion with an adhesive member (2). The curled part 11 is formed by curling the folded part to form a curled part 11 having a folded part in which the peripheral part is doubled by folding the peripheral part of the opening. A paper container or paper cup having a curled portion. 4. The curled portion 11 is formed by having a folded portion in which the peripheral portion is formed in a triple or more by folding the peripheral portion of the opening multiple times, and curling the folded portion to form a curled portion 11. A paper container or a paper cup having the curled portion according to claim 1. Folding one end side of the paper sheet 1 in advance to form a folded portion, curling the folded portion to form a curled portion 11,
6. A paper container or a paper cup having a curled portion according to claim 1, wherein a paper container or a paper cup is formed using the paper sheet having the curled portion. Folding one end side of the paper sheet 1 in advance to form a fold,
A paper container or a paper cup is formed using the paper sheet 1 having the folded portion,
The paper container or paper cup having a curled portion according to any one of claims 1 to 5, wherein the curled portion is formed by curling the folded portion. 2. A paper container or paper cup having an opening on at least one surface is formed by folding a peripheral edge of the opening, and the curled part is further curled to form a curled part 11. A paper container or a paper cup having the curl portion according to any one of 5 to 5.

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