JP2012166803A - 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 paper reinforcement part is superposed on the peripheral edge of the opening of the paper container or the paper cup which has the opening and is formed of the thin paper, and the superposed part is curled to form the curled 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 in the first place, the curl portion cannot be molded unless it has a thickness of at least a basis weight of 120 g / square meter.
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 such a problem, the invention according to claim 1 is a paper container or paper cup made of thin paper having an opening on at least one surface. It consists of a paper container or a paper cup having a curled part that curls the part to form a curled part, and the invention can solve the above problems.
The invention according to claim 2 is such that the thin paper has a thickness of at least about 120 g / square meter, and the curled portion can be formed even if the thin paper is used.

Alternatively, as in the invention according to claim 3, the reinforcing portion can be solved by a paper container or a paper cup having a curled portion made of thin paper, and the thin reinforcing portion can be used to reinforce the curled portion. It is possible.
In these cases, as in the invention according to claim 4, the paper container or paper cup having a curled portion in which the reinforcing portion is bonded to the peripheral portion with an adhesive member at the peripheral portion of the opening of the paper container or paper cup. May be used.

In these cases, as in the invention according to claim 5, the peripheral portion is doubled by overlapping the reinforcing portion on the peripheral portion of the opening, and the curled portion is formed by curling the overlapped portion. Even if a paper container or a paper cup is used, the peripheral portion is formed in three or more layers by overlapping a plurality of reinforcing portions on the peripheral portion of the opening as in the invention according to claim 6, and the overlapped portion is curled. Thus, a paper container or a paper cup having a curled part formed with a curled part may be used.
Furthermore, as in the invention according to claim 7, a paper sheet having a reinforcing part is configured by previously superposing a reinforcing part on one end of the paper sheet, and a paper container or a paper cup is formed using the paper sheet. It is also possible to use a paper container or a paper cup in which a curled portion is formed by curling the overlapped portion.

Alternatively, as in the invention according to claim 8, a reinforcing portion is preliminarily stacked on one end side of the paper sheet, the curled portion is curled to form a curled portion, and the paper sheet having the curled portion is used to make paper It is also possible to use a paper container or a paper cup having a curled part obtained by molding a paper container or a paper cup.
Furthermore, as in the invention according to claim 9, a paper container or a paper cup is formed in advance using a paper sheet, and a paper reinforcing part is stacked on the peripheral edge of the opening of the paper container or paper cup, It may be a paper container or a paper cup having a curled portion that curls the overlapped portion to form a curled portion.

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 in the opening by increasing the thickness of the curled portion. 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. .

In particular, the thickness of the paper at the curled portion can be easily increased by overlapping the reinforcing portions.
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 could not be formed conventionally.

Further, according to the invention of claim 3, a thin paper sheet can be used for the reinforcing portion, and thin paper with a low unit price can be used effectively.
Further, according to the invention of claim 4, the reinforcing portion is bonded with an adhesive member, and the strength of the reinforcing portion can be further 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 reinforcing portion of the invention according to claim 5 or the triple reinforcing portion or more of the invention according to claim 6 can have a reinforcing portion of any number of layers, as needed or Depending on the paper quality and the like, an arbitrary reinforcing part can be formed, and various thin papers can be appropriately curled, and a curled part having a required strength can be formed depending on the application.

Furthermore, as in each of the inventions shown in claims 7 to 9, 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 the reinforcing portion is overlapped on the peripheral edge portion of the paper sheet fabric, or the curled portion may be molded after being formed into a cup shape or the like. Alternatively, it may be formed, or a reinforcing part may be formed after being formed on a cup or the like.
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 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 the paper cup which shows the basic composition concerning the present invention is shown.
The paper cup shown in this figure is a paper cup having a curled portion C using kraft paper having a basis weight of 60 g / square meter.
As shown in the figure, a curled portion C is provided at the outer peripheral edge of the opening of the paper cup, and this portion is constituted by the paper sheet 1 at the outer peripheral edge of the opening of the paper cup. This is a paper cup in which the reinforcing portion 2 is stacked on the main body, the peripheral portion and the reinforcing portion 2 are bonded together with an adhesive member 3, and the curled portion C is formed by winding this portion.

By constructing in this way, the curled portion C is bonded to the kraft paper having a basis weight of at least 60 g / square meter. Therefore, when the kraft paper having a basis weight of 60 g / square meter is used for the reinforcing portion 2, the thickness is reduced. Not only the thickness of the basis weight is 120 g / sq.m., But also the adhesive member 3 is adhered, so that the adhesive member 3 has additional strength due to adhesion.
The reinforcing portion 2 uses paper, and the peripheral portion having the necessary thickness and strength can be formed by using thin paper and curling on the peripheral portion so that the portion can be curled. .

As a result, even a cup using thin paper can be configured with a curled portion C at the outer peripheral edge of the opening of the paper cup, and the curled portion C can prevent deformation of the cup itself. It is possible to provide a paper cup having strength using paper.
By this curled portion C, at least the opening portion of the cup can maintain a circular shape, and for example, it is possible to provide a cup into which drinking water or the like can be placed.
In particular, an optimal cup can be provided for a tasting cup.

In the configuration shown in the figure, the reinforcing portion 2 is laminated and bonded to the main body constituted by the paper sheet 1 at the outer peripheral edge of the opening of the paper cup using the adhesive member 3. Of course, this portion may be formed into the curled portion C by overlapping with kraft paper having a basis weight of 70 g / square meter to 120 g / square meter.
Or the reinforcement part 2 which consists of paper using the paper exceeding 120 g / square meter thicker than this, or the reinforcement part 2 which consists of a thin letter than this may be used.
Further, the paper container or the paper cup itself may be made of, for example, kraft paper of about 70 g / square meter to 120 g / square meter, or may be made of paper having a thickness of more than 120 g / square meter, which increases the strength. For this reason, it is of course possible to reinforce with the reinforcing portion 2 and mold it into the curled portion C.

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 doubled by adding a reinforcing portion 2 to a body formed of a paper sheet 1 at the peripheral edge, and further bonded by an adhesive member 3. The curled portion C is formed.
By configuring in this way, the curled portion C can be formed in a state where the paper of the curled portion C is 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 reinforcement part 2 is piled up on the main body which consists of the paper sheets 1 of the peripheral part of the opening part of a cylindrical cup.
An adhesive member 3 is applied around the periphery of the reinforcing portion 2 or the opening, and the reinforcing portion 2 is bonded.
Further, as shown in FIG. 4, the peripheral portion to which the reinforcing portion 2 is bonded is curled to form a curled portion C.
In this way, a thin paper container having a curled portion C can be molded while being very easily molded.

FIGS. 1 to 4 show, for the sake of explanation, that a reinforcing part is bonded to the peripheral edge of the opening of a cup-shaped paper container, and that this part is further curled. For example, a reinforcing sheet 2 may be stacked on one end of the sheet sheet 1 before being formed into a cup, and the reinforcing part 2 may be bonded by an adhesive member 3.
Naturally, the reinforcing portion 2 is a reinforcement for forming the curled portion C, and it is sufficient that the reinforcing portion 2 has a width that can at least constitute a curl.
In this way, after the reinforcing portion 2 is bonded, the portion where the reinforcing portion 2 is overlapped in advance is curled to form the curled portion C, and finally formed into a cup shape or a container shape.

Alternatively, it may be either formed into a cup or container shape after the stage where the reinforcing portions 2 are stacked and bonded, and the curled portion C is formed from this state.
Therefore, for example, as another method, first, one end of the thin paper sheet 1 is formed at a stage before being formed into a cup shape as shown in a sectional view of an example of the paper cup or paper container of the present invention shown in FIG. Alternatively, the reinforcing portion 2 may be bonded with the adhesive member 3 to constitute a thin paper sheet base to which the reinforcing portion 2 is bonded.
Further, as shown in FIG. 6, the reinforcing portion 2 is bonded to the paper sheet 1 and the overlapped portion which is the bonded portion is curled to form a curled portion C on one end side of the thin paper sheet 1. The sheet base having is formed.
The paper sheet 1 formed in this way may be rolled into a cup shape and molded into a cup shape.

FIG. 7 is a cross-sectional view of an example in which the reinforcing portion 2 is overlapped with the adhesive member 3 and the curled portion C is formed by curling the two in a state where the reinforcing portion 2 is not bonded and the reinforcing portion is attached. is there.
In this manner, the curled portion C can be molded because the strength can be increased by increasing the thickness by overlapping the reinforcing portions 2.
In FIG. 8, at least two reinforcing portions 2 are superposed on the peripheral edge of the opening, and if necessary, these are bonded to form a multi-layer peripheral, and then curled to form a curled portion C. It is a figure which shows another example, and is a figure which shows the step before forming the curl part C, and FIG. 9 is a figure which shows the state in which the curl part C was formed.

Even in the case shown in this figure, either an adhesive member 3 for adhesion or a curled state in an overlapped state without using an adhesive member may be used.
In this way, even if kraft paper of 60 g / square meter, for example, is used, the thickness can be further increased by the double reinforcing portion 2, and at least the peripheral portion of these multiple layers has a thickness of about 120 g / square meter. When the paper sheet 1 is 60 g / square meter, the total paper thickness is about 180 g / square meter.
Further, when an adhesive member is used, it is equivalent to paper having a greater thickness and extremely high strength.
Therefore, it is possible to form a stronger curled portion C.

In addition, for example, not only kraft paper of 60 g / square meter but also thin paper with a thin paper thickness of 40 g / square meter or a thinner paper sheet 1 is used not only in the case of one layer of reinforcement. Further, if a double layer such as two layers is used, the thickness of the paper can be increased, and if the adhesive member 3 is used, the strength can be further increased and the curled portion C can be sufficiently formed.
Accordingly, the curled portion C can be formed by stacking a larger number of the reinforcing portions 3, using the adhesive member 3, or using the extremely thin paper sheet 1. It can be molded with sufficient strength.

In the present specification, it will be described as kraft paper. However, the kraft paper is not limited to kraft paper, and high-quality paper or other various paper sheets may be used.
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.
Further, as for the reinforcing portion 2, it is of course possible to use thick paper in addition to thin 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. 10 is a view showing a state in which the reinforcing portion 2 is formed not on the outside of the cup opening but on the inside thereof, and shows a state before the curled portion C is formed.
FIG. 11 is a diagram showing an example of a state in which a curled portion C is further formed.
Even if configured in this manner, the peripheral edge of the cup is at least strong enough to curl, and the curled portion C can be formed.
Further, the curled portion C configured in this way has at least a certain strength, and has a strength capable of maintaining the cup or container opening in a certain shape.
As described above, FIGS. 1 to 9 each show an example in which the reinforcing portion 2 is used on the outside of the opening. However, the present invention is not limited thereto, and the curled portion C is formed using the reinforcing portion on the inside as shown in FIGS. You may do.

1 Paper sheet 2 Reinforcement part 3 Adhesive member C Curled part

Claims (9)

A paper container or paper cup made of thin paper has at least an opening, and a paper reinforcing portion is overlapped on the peripheral edge of the opening of the paper cup, and the overlapped portion is curled to form a curled portion. A paper container or paper cup having a curled portion. 2. 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 about 120 g / square meter or less. The paper container or paper cup having a curled portion according to claim 1, wherein the reinforcing portion is made of thin paper. 4. A paper container having a curl portion according to any one of claims 1 to 3, wherein a reinforcing portion at the peripheral edge of the opening of the paper container or paper cup is bonded to the peripheral edge with an adhesive member. Or a paper cup. The curl according to any one of claims 1 to 4, wherein a peripheral portion is formed in a double manner by overlapping a reinforcing portion on the peripheral portion of the opening, and the curled portion is curled to form a curled portion. A paper container or paper cup having a part. 5. The curving part is formed by curling the overlapped part by forming a plurality of reinforcing parts on the peripheral part of the opening, and curling the overlapped part. A paper container or paper cup having the curled portion as described. Preliminarily overlap the reinforcing part on one end side of the paper sheet, configure the paper sheet having the reinforcing part,
The curl according to any one of claims 1 to 6, wherein a paper container or a paper cup is formed using the paper sheet, and the curled portion is curled to form a curled part. A paper container or paper cup having a part. Preliminarily overlap the reinforcing part on one side of the paper sheet, curl the overlapped part to form a curled part,
The paper container or paper cup having a curled part according to any one of claims 1 to 6, wherein a paper container or a paper cup is formed using the paper sheet having the curled part. A paper container or a paper cup is formed in advance using a paper sheet, and a paper reinforcing part is stacked on the peripheral edge of the opening of the paper container or paper cup, and the curled portion is curled by curling the overlapped part. A paper container or a paper cup having a curled portion according to any one of claims 1 to 6, wherein the paper container is formed.

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