JP2004051160A - Paper cup - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper cup consisting of a barrel member and a base member joined with each other and having an upper opening rim and the bottom, which does not deteriorate compressive strength as the paper cup and can be reduced in volume by being easily crushed after use. <P>SOLUTION: The paper cup includes the barrel member having a tubular barrel, a top curl having the upper end of the barrel folded, and a fold having the lower end of the barrel folded inward, and the base member having the bottom and a bend having the outer peripheral edge of the bottom folded, wherein the bend is sandwiched between the barrel and the fold to be joined with one another. The paper cup is equipped with a tear line on the bottom, wherein the tear line is formed of a half-cut line or a rule. The paper cup is characterized by one tear line provided on a diameter line passing through the center of the bottom, two tear lines provided in parallel to form a strip passing through the center of the bottom, or two tear lines provided to intersect at the center of the bottom to form a cross. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a paper cup that can be reduced in volume, and more particularly, to a paper cup that can be easily crushed after use and can be discarded with a reduced volume.
[0002]
[Prior art]
In recent years, paper cups have been widely used in the field of packaging of foods, beverages, and the like, from the viewpoints of environmental measures such as resource saving, reduction of garbage volume, and recyclability. Furthermore, it has come to be sold as a product filled with contents such as foods and beverages.
[0003]
In recent years, environmental problems have become a major problem, and awareness of protecting the natural environment has been increasing. In particular, the problem of waste disposal is serious, and there is a need for resource saving by using as little material as possible and measures such as recycling, which is the reuse of resources. Against this background, it is also desirable to reduce the volume as much as possible when discarding containers used for packaging.
[0004]
[Problems to be solved by the invention]
However, paper cups made of paper are bulky after use, so they are crushed or peeled off at the joints, dismantled to reduce the volume, and discarded. In particular, there is a problem that it is difficult to disassemble a paper cup using a high-strength paper having a basis weight.
Some cartons are already provided with ruled lines for assisting folding in order to reduce the volume of the carton after use.
[0005]
SUMMARY OF THE INVENTION The present invention has been found to solve the above-mentioned problems. In a paper cup having a body member and a bottom member joined to each other and having an upper opening edge and a bottom portion, a reduction in compressive strength as a paper cup is achieved. It is an object of the present invention to provide a paper cup in a form that can be reduced in volume by easily crushing after use without causing a problem.
[0006]
[Means for Solving the Problems]
Means for Solving the Problems The present invention made to solve the above-mentioned problem provides a body having a cylindrical body, a top curl part obtained by bending the upper end side of the body part, and a folded part obtained by bending the lower end of the body part inward. A member, a bottom part, and a bottom member having a bent part obtained by bending an outer peripheral edge of the bottom part, wherein the bent part is sandwiched between the body part and the folded part and joined to each other. A paper cup, wherein a tear line is provided on the bottom surface. Further, the tear line is provided as a half-cut line or a ruled line. Further, the tear line is provided one on a diameter line passing through the center of the bottom portion, two provided in parallel to form a band passing through the center of the bottom portion, or, It is characterized in that two are provided so as to cross each other at the center of the bottom surface to form a cross.
[0007]
According to the present invention, in a paper cup having a body member and a bottom member joined to each other and having an upper opening edge and a bottom portion, a tear line is provided on the bottom portion of the bottom member without lowering the strength of the paper cup. Thereby, after use, the tearing line can be torn, and a paper cup in a form capable of easily crushing the body member to reduce the volume can be obtained.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a detailed description will be given based on the drawings. FIG. 1 is a perspective view showing an embodiment of a paper cup according to the present invention, FIG. 2 is a partially cutaway sectional view showing an embodiment of the paper cup according to the present invention, and FIG. FIG. 4 is a development view showing a blank of one embodiment, FIG. 4 is a perspective view illustrating an assembling process of one embodiment of a paper cup according to the present invention, and FIG. 5 is a perspective view of one embodiment of a paper cup according to the present invention. It is a figure explaining volume reduction.
[0009]
FIG. 1 is a perspective view showing an embodiment of a paper cup according to the present invention. The appearance of the paper cup A is substantially the same as that of a normal paper cup, as shown in FIG. 1, and includes a trunk member 1 and a bottom member 2 as shown in FIG. The upper end is curled outward to form a top curled portion 12 which is a circular upper opening edge, and the lower end is folded inward to form a folded portion 13. On the other hand, the bottom member 2 forms a circular bottom surface portion 21, and the circular outer peripheral edge portion is bent downward at a substantially right angle to form a bent portion 22. The joining of the trunk member 1 and the bottom member 2 is performed by thermocompression bonding with the bent portion 22 of the bottom member 2 sandwiched between the folded portion 13 of the trunk member 1 and the lower end of the trunk portion 11.
[0010]
The paper cup A of the present invention is characterized in that a tear line L is provided in the bottom portion 21 of the bottom member 2.
[0011]
The tear line L is provided linearly on the bottom surface portion 21 of the bottom member 1 by a ruled line or a half-cut line. The position is on a diameter line passing through the center O of the bottom surface portion 21 when the bottom surface portion 21 is circular.
[0012]
Further, in order to make the tear line L easy to tear, it is preferable to form a half-cut shape, but in the case of a half-cut, at least the innermost layer is left so that the contents do not leak.
[0013]
FIG. 3 is a blank development view of the paper cup according to the present invention. As shown in FIG. 3, the paper cup A is formed from a body member blank 1A and a bottom member blank 2A. The tear line L is not provided in the bottom member blank 2A of a general paper cup, whereas the tear line L is provided in the bottom member blank 2A in the paper cup A of the present invention. In the bottom portion 21 of the circular bottom member blank 2A, one tear line L is provided on the diameter line through the center O of the bottom portion 21.
[0014]
The tear line L is different from one line in the present embodiment, and as shown in FIG. 4A, two tear lines parallel to each other so as to form a band passing through the center O of the bottom surface portion 21. L1 and L2 may be used. Further, in order to facilitate tearing of the strip-shaped tear lines L1 and L2, a tear line L3 connecting the tear lines L1 and L2 may be provided as shown in FIG. it can. Further, as shown in FIG. 4C, the center line O of the bottom surface portion 21 may be provided in a shape in which the tear lines L1 and L2 intersect to form a cross.
[0015]
Three or more tear lines L may be provided. In that case, it may be parallel or crossed, and is preferably provided at a position passing near the center O of the bottom surface portion 21.
[0016]
In the present embodiment, the paper cup A has a circular upper opening edge and a circular bottom surface, but in the case of a paper cup having a substantially square opening edge and a substantially square bottom surface, the tear line L is substantially It is preferable to provide on the diagonal line of the square bottom. If the paper cup is provided not on a diagonal line but between opposing sides, the paper cup is less likely to be crushed.
[0017]
Next, the configuration of the material used for the paper cup A of the present invention is based on the fact that paper is the main strength material and that the innermost layer has a thermoplastic resin, and has a function of protecting the contents. Also, the outermost layer is preferably made of a thermoplastic resin. Examples of specific material configurations include paper / polyethylene, paper / polypropylene, paper / polyethylene terephthalate, polyethylene / paper / polyethylene, polypropylene / paper / polypropylene, polyethylene / paper / polypropylene, polyethylene / paper / polyethylene terephthalate, Paper / polyethylene / aluminum / polyethylene, polyethylene / paper / polyethylene / aluminum / polyethylene, polyethylene / aluminum / paper / polyethylene, paper / polyethylene / silica-deposited polyethylene terephthalate film / polyethylene, polyethylene / paper / polyethylene / silica-deposited polyethylene terephthalate film / Polyethylene, paper / polyethylene / aluminum-deposited polyethylene terephthalate film / polyethylene, polyethylene / Paper / polyethylene / aluminum-deposited polyethylene terephthalate film / polyethylene, paper / polyethylene / nylon / polyethylene, polyethylene / paper / polyethylene / nylon / polyethylene, paper / polyethylene / silica-deposited nylon film / polyethylene, polyethylene / paper / polyethylene / silica-deposited A laminate such as a nylon film / polyethylene may be used.
[0018]
As the paper as the main strength material, it is preferable to use cup base paper having good suitability for paper cup molding. The basis weight is not particularly limited, but is preferably in the range of 150 to 350 g / m ² in view of suitability for paper cup molding.
[0019]
FIG. 5 is a diagram illustrating a process of forming the paper cup A of the present invention. This molding step is the same as a general paper cup molding step. First, a laminate mainly made of paper is punched out to produce a body member blank 1A and a bottom member blank 2A as shown in FIG. I do. A tear line L is provided in advance in the bottom blank 2A in a punching step.
[0020]
Next, this trunk member blank 1A is wound around a mandrel, and as shown in FIG. It is formed into a cylindrical body member 1.
[0021]
Next, as shown in FIG. 5B, the bottom member blank 2A is fitted from below the body member 1 with a paper cup forming machine, the adhesive portion is heated with hot air, and the lower end of the body member 1 is folded inward to be folded. As shown in FIG. 5C, the body member 1 and the bottom member 2 are joined together with a bent portion obtained by bending the outer peripheral edge of the bottom member blank 2A sandwiched therebetween.
[0022]
Further, as shown in FIG. 5D, the upper end of the body member 1 is curled outward to form a top curled portion 12, thereby producing a paper cup A.
[0023]
FIG. 6 is a diagram illustrating a method of crushing the paper cup A according to the present invention to reduce the volume. After the paper cup A according to the present invention is used, first, a part of the tear line L of the bottom surface portion 21 of the bottom member 1 is pierced with a finger as shown in FIG. And it tears starting from that part. Next, as shown in FIG. 5B, the body 11 is crushed inward in the direction of the tear line L. Since the bottom part 21 is torn by the tear line L, as shown in FIG. 5C, the body part 11 can be easily crushed, and the volume of the paper cup A can be reduced.
[0024]
【The invention's effect】
The present invention is a paper cup in which a trunk member and a bottom member are joined to each other and has an upper opening edge and a bottom portion, without causing a reduction in strength as a paper cup, providing a tear line on the bottom portion of the bottom member, After use, first, the tearing line on the bottom part can be easily crushed to reduce the volume by easily crushing the body member.The body part can be crushed flat and the entire paper cup can be folded, It is a paper cup that does not cause a decrease in compressive strength and has excellent discardability due to volume reduction. By reducing the volume of the paper cup, processing such as storage and transportation can be performed efficiently without taking up a large volume at the time of disposal.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a paper cup according to the present invention.
FIG. 2 is a partially cutaway sectional view showing one embodiment of a paper cup according to the present invention.
FIG. 3 is a development view showing a body member blank and a bottom member blank of one embodiment of the paper cup according to the present invention.
FIG. 4 is a development view showing a bottom member blank of another embodiment of the paper cup according to the present invention.
FIG. 5 is a perspective view illustrating an assembling process of an embodiment of the paper cup according to the present invention.
FIG. 6 is a diagram illustrating a method of crushing and reducing the volume of an embodiment of a paper cup according to the present invention.
[Explanation of symbols]
A Paper cup 1A of the present invention Body member blank 2A Bottom member blank 1 Body member 2 Bottom member 11 Body 12 Top curl portion 13 Folded portion 21 Bottom portion 22 Bent portion L Tear line L1 Tear line L2 Tear line L3 Tear line O Center ( Bottom part)

Claims (6)

A body member having a tubular body, a top curl portion obtained by bending the upper end side of the body portion, and a folded portion obtained by bending the lower end of the body portion inward,
A paper cup comprising a bottom part and a bottom member having a bent part obtained by bending an outer peripheral edge of the bottom part, wherein the bent part is sandwiched between the body part and the folded part and joined together. So,
A paper cup, wherein a tear line is provided on the bottom surface. The paper cup according to claim 1, wherein the tear line is provided by a half cut line. The paper cup according to claim 1, wherein the tear line is provided by a ruled line. The paper cup according to any one of claims 1 to 3, wherein one tear line is provided on a diameter line passing through the center of the bottom portion. The paper cup according to any one of claims 1 to 3, wherein two tear lines are provided in parallel so as to form a band passing through the center of the bottom surface portion. The paper cup according to any one of claims 1 to 3, wherein two tear lines are provided so as to intersect at a center of the bottom surface portion to form a cross.

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