JP4094730B2 - Insulated paper cup - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper cup of double structure having an insulating space the body portion.
[0002]
[Prior art and its problems]
The disadvantage of paper cups is that they are inferior in heat insulation, and are not suitable for products that use hot water such as hot drinks and instant noodles. In order to improve this, a knob is attached to the body of the cup, or as shown in FIG. 4, embossed paper 23 and coated cardboard 22 are applied to the outer peripheral surface of the body 21 of the paper cup 20, or FIG. As shown in FIG. 5, the space forming convex portion 24 is formed on the body portion 21 of the paper cup 20 and the outside is surrounded by the outer paper so that the air insulating space 25 is formed to achieve heat insulation. I have to. However, these conventional paper cups have the following drawbacks.
[0003]
1. Paper cups with knobs are not safe when held by hand and are dangerous for hot drinks.
2. The gluing process is included and the manufacturing cost increases.
3. In the case of FIG. 4, since the end cross sections of the embossed paper and the coated cardboard are exposed, the design is lacking, and moisture and the like are absorbed from this end cross section. Further, since the paste between the embossed paper and the paper cup 20 and the coated cardboard 22 needs to be glued, the manufacturing cost increases.
4). In the case of FIG. 5, the heat insulating space is small, the heat insulating property is inferior, and the design of the single cup is not present. In addition, a gluing process is required to fix the exterior paper, which increases the manufacturing cost.
[0004]
The object of the present invention is to provide a heat insulating paper cup having excellent heat insulating properties, having a single cup-like design, low manufacturing cost, and not absorbing water by not exposing the cross section of the paper, and this manufacturing method. That is.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, in the invention according to claim 1, in a heat insulating paper cup, a. With the bottom side edge of the paper inner cup 1 is folded outwardly to form a folded portion 5, to the formation of the expanding diameter step difference portion 4 enlarged the upper portion of the inner cup 1,
b. At the bottom side of the inner cup 1 , a bottom material 3 having a sleeve edge 6 formed by bending the periphery downward is inserted, and the outer peripheral surface of the sleeve edge 6 of the bottom material 3 and the bottom inner peripheral surface of the inner cup 1. Contacted,
c. Together to position the outer side cup 2 to the outside of the periphery of the inner cup 1, with seeded the outer side bottom edge of the cup 2 to the outer sleeve edge 6 of the folded portion 5 and the bottom member 3 of the inner cup 1 Forming the bottom side indenting portion 7 that is fixed together.
d. After the upper inner peripheral surface of the outer cup 2 is brought into close contact with the outside of the enlarged stepped portion 4, the upper edge of the outer cup 2 is bent outward to form an upper edge 8. The upper edge of 1 is squeezed further inwardly from the outside to form the mouth side indenting portion 9 for fixing the upper edge 8 of the outer cup 2 and the upper edge of the inner cup 1 together;
e. According to the above configuration , the heat insulating space 10 is formed in the body portion between the inner cup 1 and the outer cup 2 and between the enlarged diameter step portion 4 and the folded portion 5 of the inner cup 1 .
f. It is characterized by .
[0006]
According to the said structure, since the space is formed between the inner side cup and the outer side cup, it is excellent in heat insulation, and it becomes the shape of a single paper cup in appearance, and is excellent in the design property. Further, since the end cross section of the paper is not exposed, water is not absorbed. In addition, since the gluing step is not included and the inner cup and the outer cup are integrated, the manufacturing is simple and machine production is possible.
[0007]
[Example 1]
FIG. 1 is an external view of a paper cup according to the present invention, and FIG. 2 is a cross-sectional view.
This paper cup is made by integrating a paper inner cup 1, an outer cup 2 and a bottom material 3, and its configuration is such that the bottom side edge of the inner cup 1 is folded outward to form the folded portion 5. a shape formed with enlarged diameter stepped difference portion 4 enlarged the upper portion of the inner cup 1.
[0008]
The outer cup 2 is located outside the body portion of the inner cup 1, and the outer cup 2 folds the bottom side edge inward so that the folded portion 5 of the inner cup 1 and the sleeve edge 6 of the bottom member 3 are connected. the Maki write Mukoto a configuration of forming the bottom Makikomi unit 7.
[0009]
Further, the inner cup 1 is pierced and fixed at the upper edge 8 of the outer cup 2 that has been folded in the horizontal direction by squeezing the upper end of the inner cup 1, thereby forming the mouth-side crease 9, and the heat insulation space 10 in the body part. It is the formed structure .
[0010]
The manufacturing method of the heat insulation paper cup of the said structure is demonstrated based on Fig.3 (a)-(d) .
First, as shown in FIG. 3 (a), by folding back the bottom edge outward to form a folded portion 5 with an enlarged diameter upper inner cup 1 to form the enlarged diameter stepped difference portion 4, the bottom The bottom material 3 in which the sleeve edge 6 is formed downward is inserted inside the side .
[0011]
Next, as shown in FIG. 3 (b), the outer cup 2 is positioned outside the inner cup 1, and then the sleeve edge 6 of the bottom material 3 and the bottom of the inner cup 1 are formed at the lower edge of the outer cup 2. The folded-back portion 5 at the side edge is rolled in to form the bottom-side rolled-in portion 7, and the inner cup 1, the bottom material 3, and the outer cup 2 are fixed on the bottom side.
[0012]
Next, as shown in FIG. 3 (c), the upper edge 8 of the outer cup 2 is rubbed with the upper edge of the inner cup 1 to form the mouth side crease 9, whereby the inner cup 1 and the outer cup 2 are moved. Secure at the top. FIG. 3 (d) shows an example in which the upper edge 8a of the outer cup 2 is made straight without bending, and the punched portion 9 of the inner cup 1 is formed on the outer side . In FIG. 3, (a ′ ) is an example in which the folded portion 5a is formed in a double, and (b ′ ) is an example in which the double folded portion 5a is wound.
The present paper cups, although remain open mouth side, depending on the application, or with a universal lid closing the mouth side, is utilized in a sealed form like a lid member placed the contents inside.
[0013]
【The invention's effect】
The heat insulating paper cup according to the present invention has the following configuration and manufacturing method, and has the following effects.
1. The diameter expansion step difference portion and the folded-back portion formed on the inner cup, freely the distance between the outer cup, made larger. As a result, a paper cup having excellent heat insulation can be obtained by expanding the heat insulation space.
2. On the bottom side of the cup, the lower edge of the outer cup is cut inward to integrate the lower edge of the inner cup and the sleeve edge of the bottom material, and on the upper side, the upper edge of the inner cup is driven outward. By integrating it with the upper edge of the cup, it is possible to obtain a paper cup that has a double structure but has sufficient strength and is easy to use.
[0014]
3. The appearance is indistinguishable between the inner cup and the outer cup, so the design is a single cup and looks very nice.
4). By integrating the inner cup and the outer cup, the material of the inner cup can be reduced by the increased strength, and a paper cup can be provided at a lower cost by reducing the material cost.
5. The inner cup and the outer cup are integrated by swallowing, and the end cross section of the paper is not exposed at all, so it does not absorb water.
6). Since there is no glued portion, the manufacturing cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of an insulated paper cup embodying the present invention.
FIG. 2 is a cross-sectional view of a heat insulating paper cup embodying the present invention.
FIG. 3 is an explanatory diagram of a paper cup manufacturing method.
FIG. 4 is a perspective view of a conventional paper cup provided with heat insulation using embossed paper and coated cardboard.
FIG. 5 is an explanatory diagram of a conventional heat insulating paper cup in which a heat insulating space is formed outside the paper cup.
[Explanation of symbols]
1 inner cup 2 outer cup 3 bottom member 4 diameter stepped difference portion 5 folded portion 6 sleeve edge 7 bottom Makikomi portion 8 bent on edge 9 necked side Makikomi portion 10 insulation space

Claims (1)

a. With the bottom side edge of the paper inner cup 1 is folded outwardly to form a folded portion 5, to the formation of the expanding diameter step difference portion 4 enlarged the upper portion of the inner cup 1,
b. At the bottom side of the inner cup 1 , a bottom material 3 having a sleeve edge 6 formed by bending the periphery downward is inserted, and the outer peripheral surface of the sleeve edge 6 of the bottom material 3 and the bottom inner peripheral surface of the inner cup 1. Contacted,
c. Together to position the outer side cup 2 to the outside of the periphery of the inner cup 1, with seeded the outer side bottom edge of the cup 2 to the outer sleeve edge 6 of the folded portion 5 and the bottom member 3 of the inner cup 1 Forming the bottom side indenting portion 7 that is fixed together.
d. After the upper inner peripheral surface of the outer cup 2 is brought into close contact with the outside of the enlarged stepped portion 4, the upper edge of the outer cup 2 is bent outward to form an upper edge 8. The upper edge of 1 is squeezed further inwardly from the outside to form the mouth side indenting portion 9 for fixing the upper edge 8 of the outer cup 2 and the upper edge of the inner cup 1 together;
e. According to the above configuration , the heat insulating space 10 is formed in the body portion between the inner cup 1 and the outer cup 2 and between the enlarged diameter step portion 4 and the folded portion 5 of the inner cup 1 .
f. Insulated paper cup featuring .

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