JP2001002052A - Heat insulating paper cup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulating paper cup which is simply structured, is excellent in heat insulation and hygienic, and is superior in disposability. SOLUTION: This heat insulating paper cup comprises a paper cup main body 1 in an inverted truncated cone shape having an outward curl part 13 on its opening edge and a heat insulating cover 2a adhered to the outer face of the cup main body 1 of a body part 11. On the top end edge of the cover 2a, an inward curl part 22 is formed and also on the bottom end edge, an inward folding part, a V shape folding part, a two-stage folding part, a double folding part or an inward curl part are formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper cup having an insulating property for holding instant foods, beverages and the like.

[0002]

2. Description of the Related Art Conventionally, as containers for instant noodles and the like, containers made of expanded polystyrene, which are excellent in moldability and heat insulating properties, are easy to manufacture, and are inexpensive, and double containers made of plastic film are used. However,
Recently, the hygiene of plastic containers and pollution at the time of disposal have become a problem, and there is an increasing tendency to switch to heat-insulating paper containers instead of using instant food containers made of plastic. As a heat insulating paper container, a fan-shaped blank plate is wound into a cylindrical shape and left and right side edges are bonded to form a cylindrical peripheral wall, and a circular bottom wall is bonded to the lower edge of the cylindrical peripheral wall A paper cup with a configuration in which an outward curled portion is formed on the upper part of the paper cup, and a heat insulating cover with corrugated irregularities formed on the outer surface of the peripheral wall of the paper cup, and a paper with an outer paper bonded on the outer surface. However, the above-mentioned one has a drawback that the printing effect is poor and the appearance is not good due to the formation of irregularities on the surface, and the latter one has a good printing effect but the peripheral wall has a three-layer structure. Therefore, there was a disadvantage that it became expensive. As an insulated paper cup having the above-mentioned disadvantages improved, an outer curl portion having an inward curl portion at a lower end edge is provided on the outer periphery of the entire side wall of a paper cup body having an outward curl portion at an opening edge as described in Utility Model Registration No. 2571797. A heat-insulating paper cup having a configuration in which a cylinder is bonded and integrated is known. In the case of the heat-insulating paper cup having this configuration, the heat insulation at the lower portion of the cup is excellent, but the gap between the side wall of the paper cup body and the outer cylinder is excellent at the upper portion. Has the disadvantage that the heat insulating property is not good because of the small size.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a heat-insulating paper cup which has a simple structure, has excellent heat insulating properties at the upper portion of the paper cup, and is excellent in hygiene and disposal.

[0004]

SUMMARY OF THE INVENTION An inverted frustoconical paper cup body having an outward curl portion at an opening edge, and a heat insulating cover attached to the outer surface of the body of the paper cup body, have an inward curl at the upper edge of the heat insulating cover. It is a heat-insulating paper cup having a configuration in which a portion is formed. In this case, since a gap is formed between the body of the paper cup body and the heat insulating cover by the inward curl portion of the upper edge of the heat insulating cover, it is necessary to ensure excellent heat insulating properties at the top of the paper cup gripped by hand when lifting the paper cup. Can be. Further, since the surface of the heat insulating cover attached to the outer surface of the paper cup main body is smooth, it is easy to form a printed picture, and a heat insulating paper cup having excellent design can be obtained.

[0005] In the above-described heat-insulating paper cup, by forming a bent portion inward at the lower end edge of the heat-insulating cover, a gap corresponding to the diameter of the inward curl portion is formed between the paper cup body and the heat-insulating cover at the upper portion. In the lower part, a gap corresponding to the thickness of the paperboard forming the heat insulating cover can be formed, so that excellent heat insulating properties can be obtained.

In the above-mentioned heat-insulating paper cup, by forming a V-shaped bent portion inward at the lower end edge of the heat-insulating cover, the diameter of the inward curl portion is increased between the paper cup body and the heat-insulating cover at the upper portion. A corresponding gap is formed, and a gap corresponding to the thickness of the V-shaped bent portion can be formed at the lower portion, so that excellent heat insulating properties can be obtained.

In the above-described heat-insulating paper cup, by forming a two-step bent portion inward at the lower end edge of the heat-insulating cover, the upper portion corresponds to the diameter of the inward curl portion between the paper cup body and the heat-insulating cover. Gap is formed at the bottom and 2
Since a gap corresponding to the thickness of the step bent portion can be formed, excellent heat insulating properties can be obtained.

In the above-described heat-insulating paper cup, by forming a double-folded portion inward at the lower end edge of the heat-insulating cover, the upper portion corresponds to the diameter of the inward curl portion between the paper cup body and the heat-insulating cover. Gap is formed at the bottom and 2
Since a gap corresponding to the thickness of the heavily bent portion can be formed, excellent heat insulating properties can be obtained.

In the above-described heat-insulating paper cup, by forming the inward curl portion at the lower end edge of the heat-insulating cover, a gap corresponding to the diameter of the inward curl portion is formed between the paper cup body and the heat-insulating cover at the upper and lower portions. Since it can be formed, excellent superior heat insulating properties can be obtained in the vertical direction.

In the above-described heat-insulating paper cup, by setting the length of the heat-insulating cover in the vertical direction to be substantially the same as the length of the paper cup main body in the vertical direction, a gap is formed between the paper-cup main body and the heat-insulating cover over the entire length of the heat-insulating paper cup. Therefore, excellent heat insulating properties can be obtained.

In the above-described heat-insulating paper cup, the length of the heat-insulating cover in the vertical direction is 1/3 to 2/3 of the length of the paper cup main body in the vertical direction, and is attached to the upper portion of the paper cup main body. With the configuration described above, the inward bending of the heat insulating cover is reduced in the portion gripped by hand when the upper portion of the heat insulating paper cup is gripped and lifted, so that a gap between the paper cup body and the heat insulating cover can be secured. Excellent heat insulation is obtained. Further, since the development area of the heat-insulating cover is reduced, the number of materials constituting the heat-insulating cover can be reduced, and the cost can be increased.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a half of the first embodiment of the present invention in cross section, FIG. 2 is a side view showing a half of the second embodiment of the present invention in cross section, and FIG. 3 is a third embodiment of the present invention. FIG. 4 is a side view showing a half section of FIG.
FIG. 5 is a side view showing a half of the fifth embodiment of the present invention in cross section, FIG. 5 is a side view showing a half of the fifth embodiment of the present invention in cross section, and FIG. 6 is a side view showing a half of the sixth embodiment of the present invention in cross section. FIG. 7 is a side view showing a half of the seventh embodiment of the present invention in cross section. FIG. 8 is a side view showing a half of the eighth embodiment of the present invention in cross section. 11 is the torso, 12 is the bottom, 13
Is an outward curl portion, 14 is an outward flat curl portion, 2a, 2b, 2c, 2d,
2e, 2f, 2g are heat insulating covers, 21 is a trunk, 22 and 24 are inward curls, 23a is a bent part, 23b is a V-shaped bent part, 23c is a two-step bent part, and 23d is a double folded part. Curves 4 represent voids.

A first embodiment of a heat-insulating paper cup according to the present invention, as shown in FIG. 1, is a body portion of a paper cup body 1 having a body portion 11, a bottom portion 12, and an outward curl portion 13 formed at an opening edge. A heat insulating cover 2a having a length substantially the same as the length of the paper cup body 1 in the vertical direction and having an inward curl portion 22 formed on an upper edge thereof is attached to an outer surface of the paper cup body 1.
In this configuration, a gap 4 is formed between the outer surface of 11 and the trunk 21 of the heat insulating cover 2a. In the first embodiment, the gap 4 between the body 11 of the paper cup body 1 and the body 21 of the heat insulating cover 2a has an interval corresponding to the diameter of the inward curl portion 22 at the upper portion and the interval gradually decreases at the lower portion. Is formed, a heat-insulating paper cup having excellent heat-insulating properties in the upper portion can be obtained.

A second embodiment of the heat-insulating paper cup of the present invention, as shown in FIG. 2, is a body portion of a paper cup body 1 having a body portion 11, a bottom portion 12, and an outward curl portion 13 formed at an opening edge. A heat insulating cover 2b having a length substantially the same as the length of the paper cup body 1 in the vertical direction on the outer surface thereof, an inward curl portion 22 formed on the upper edge, and a bent portion 23a formed on the lower edge.
Is attached, and a gap 4 is formed between the outer surface of the body 11 of the paper cup body 1 and the body 21 of the heat insulating cover 2b. In the second embodiment, between the body 11 of the paper cup body 1 and the body 21 of the heat insulating cover 2a, the upper part has a space corresponding to the diameter of the inward curl part 22 and the lower part has the thickness of the paperboard forming the heat insulating cover 2a. Since the gaps 4 having the intervals corresponding to the above are formed, a heat insulating paper cup having excellent heat insulating properties in the upper part and heat insulating properties in the lower part can be obtained.

In a third embodiment of the heat insulating paper cup of the present invention, as shown in FIG. 3, the outward curl portion 13 formed at the opening edge of the paper cup main body 1 in the second embodiment is flattened by crushing in the vertical direction. The second embodiment is the same as the second embodiment except that a curl portion 14 is provided. In the third embodiment, the same heat insulation properties as in the second embodiment can be obtained. The paper cup body 1
Since the outward curl portion of the opening edge of the opening is a flat curl portion 14 and a flat flange is formed, when attaching the lid material to the mouth portion of the heat insulating paper cup of the third embodiment by heat bonding,
Since the bonding area is larger than in the case of the outward curl portion 13, the stability of thermal bonding is excellent.

In a fourth embodiment of the heat-insulating paper cup according to the present invention, as shown in FIG. 4, an inward curl portion 22 is formed on the outer surface of the paper cup main body 1 at the upper edge and the inward curl is formed at the lower edge. Paper cup body 1 having a shape in which the portion 23a is formed.
In this configuration, a heat insulating cover 2c shorter than the length in the vertical direction is attached to the upper portion of the paper cup body 1. In the fourth embodiment, a gap between the paper cup body 1 and the heat insulating cover 2c has an interval corresponding to the diameter of the inward curl portion 22 in the upper part and a gap corresponding to the thickness of the paperboard forming the heat insulating cover 2c in the lower part. 4 is formed, but since the length of the heat-insulating cover 2c in the vertical direction is short, when the heat-insulating paper cup is grasped, the inward bending of the body 21 of the heat-insulating cover 2c is small, and the space between the gaps 4 is reduced. Is maintained, so that the heat insulating property is excellent. Further, the development area of the heat-insulating cover 2c is reduced and the material constituting the heat-insulating cover 2c can be reduced, so that the cost can be reduced.

A fifth embodiment of the heat-insulating paper cup of the present invention, as shown in FIG. 5, is a body portion of a paper cup body 1 having a body portion 11, a bottom portion 12, and an outward curl portion 13 formed at an opening edge. On the outer surface of the paper cup 11, an inward curl portion 22 having substantially the same length as the vertical direction of the paper cup body 1 was formed at the upper edge, and an inward V-shaped bent portion 23b was formed at the lower edge. In this configuration, the heat insulating cover 2d is attached. In the fifth embodiment, the body 11 of the paper cup body 1 and the body of the heat insulating cover 2d
A gap 4 is formed between the gaps 21 at the upper part with a gap corresponding to the diameter of the inward curl part 22 and at the lower part with a gap corresponding to the thickness of the V-shaped bent part 23b. Becomes large in the lower part, so that the heat insulating property is excellent also in the lower part.

In the sixth embodiment of the heat-insulating paper cup of the present invention, as shown in FIG. 6, the outer surface of the body 11 of the paper cup body 1 has a length substantially equal to the length of the paper cup body 1 in the vertical direction. A heat insulating cover 2e having an inward curl portion 22 formed at the upper edge and a two-step bent portion 23c formed inward at the lower edge.
Is attached. In the sixth embodiment, between the body 11 of the paper cup body 1 and the body 21 of the heat insulating cover 2e, there is a gap corresponding to the diameter of the inward curl part 22 in the upper part, and the thickness of the two-step bent part 23c in the lower part. Is formed, and the gap 4 becomes larger at the lower portion, so that the heat insulating property is excellent also at the lower portion. In the sixth embodiment, the thickness of the two-step bent portion 23c can be changed by changing the interval between the two bent positions.

In the seventh embodiment of the heat-insulating paper cup of the present invention, as shown in FIG. 7, the outer surface of the body 11 of the paper cup body 1 has a length substantially equal to the length of the paper cup body 1 in the vertical direction. A heat insulating cover 2f in which an inward curl portion 22 is formed at the upper end edge and an inward double bent portion 23d is formed at the lower end edge.
Is attached. In the sixth embodiment, a space corresponding to the diameter of the inward curl portion 22 is provided at the upper portion between the body portion 11 of the paper cup body 1 and the body portion 21 of the heat insulating cover 2f.
Since the gaps 4 are formed at intervals corresponding to the thickness of the double folded portion 23d, that is, twice the thickness of the paperboard forming the heat insulating cover 2f, the intervals of the gaps 4 are large at the lower part and also at the lower part. Excellent heat insulation.

In the eighth embodiment of the heat-insulating paper cup of the present invention, as shown in FIG. 8, the outer surface of the body 11 of the paper cup body 1 having the flat curl portion 14 at the opening edge is provided on the outer surface of the paper cup body 1 in the vertical direction. The heat-insulating cover 2g having a length substantially the same as the length and having an inward curl portion 22 formed at the upper edge and an inward curl portion 24 formed at the lower edge is also attached. In the eighth embodiment, an interval corresponding to the diameter of the inward curl portion 22 is provided at the upper portion between the body portion 11 of the paper cup body 1 and the body portion 21 of the heat insulating cover 2g, and the space corresponding to the diameter of the inward curl portion 24 is provided at the lower portion. Since the gaps 4 having the gaps are formed, the heat insulating property is excellent over the entire length in the vertical direction. The paper cup body 1
Since the outward flat curl portion 14 is formed at the edge of the opening, there is an effect that the thermal adhesion at the time of covering the opening and attaching the lid member can be improved.

The first, second, fourth, fifth, sixth,
In the seventh embodiment, the outward curl portion formed on the opening edge of the paper cup body may be an outward flat curl portion. In the third and eighth embodiments, the outward flat curl portion formed on the opening edge of the paper cup body may be an outward curl portion. It may be a part.
Further, the heat insulating cover 2a in the first embodiment, the heat insulating cover 2b in the second and third embodiments, the heat insulating cover 2d in the fifth embodiment, the heat insulating cover 2e in the sixth embodiment, and the heat insulating cover in the seventh embodiment. 2f, the vertical length of the heat-insulating cover 2g in the eighth embodiment may be そ れ ぞ れ to ／ of the vertical length of the paper cup body. In the first to eighth embodiments, the heat insulating covers 2a, 2b, 2c, 2d, 2e, 2f, 2g are provided on the outer surface of the body of the paper cup body.
When installing, cover 2a, 2b, 2c, 2d, 2e, 2f, 2g
Is fixed to the body of the paper cup body by using an adhesive at an upper edge and / or a lower edge thereof.

The diameter of the outward curl portion formed at the opening edge of the paper cup main body and the inward curl portion formed at the upper edge and the lower edge of the heat insulating cover is in the range of 2 to 5 mm, and is formed at the opening edge of the paper cup main body. The diameter of the outward curl part to be
It is preferable that the diameter of the inward curl portion formed on the upper edge and the lower edge of the heat insulating cover is 2 to 3 mm. By doing so, the outer end of the outward curl portion formed at the opening edge of the paper cup main body can protrude outward by 2 to 3 mm from the outer end of the inward curl portion at the upper edge of the heat insulating cover. The support when the lid material is thermally bonded is facilitated. Also, as in the third embodiment and the eighth embodiment,
The outward curl portion formed at the opening edge of the paper cup main body is crushed vertically to form an outward flat curl portion, so that the width of the outward flat curl portion in the horizontal direction is widened. Support becomes easier.

As the material constituting the paper cup body of the heat-insulating paper cup of the present invention, a material having a structure in which a thermoplastic resin layer is laminated on one side of a cup base paper is used. The thickness of the cup base paper is 200 to 30 depending on the shape, size and the like.
It is preferable to select within the range of 0 g / m ² . As the thermoplastic resin layer, low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, multilayer of low density polyethylene / medium density polyethylene / low density polyethylene or low density polyethylene / high density polyethylene / low density polyethylene Configuration is used.
As a material constituting the heat insulating cover, a paperboard having a smooth surface such as a coated ball, a manila ball, and ivory is used. The thickness is suitably from 200 to 300 g / m ² . As a laminate constituting the paper cup body, for example, cup base paper 280 to 300 g / low density polyethylene 25 to 40
μ. First, second, third, fifth, sixth, seventh, eighth
In the embodiment, the printed pattern is provided on the outer surface of the heat insulating cover,
In the fourth embodiment, the printed picture is provided on the outer surface of the heat-insulating cover, or is provided on the outer surface of the heat-insulating cover and in the lower part of the body of the paper cup body where the heat-insulating cover is not attached.

[0024]

According to the present invention, an inverted frustoconical paper cup body having an outward curl portion at the opening edge and a heat insulating cover attached to the outer surface of the body of the paper cup body have an inward curl portion formed at the upper edge of the heat insulating cover. This is a heat-insulating paper cup having the following configuration. In this case, since a gap is formed between the body of the paper cup body and the heat insulating cover by the inward curl portion of the upper edge of the heat insulating cover, it is necessary to ensure excellent heat insulating properties at the top of the paper cup gripped by hand when lifting the paper cup. Can be. Further, since the surface of the heat insulating cover attached to the outer surface of the paper cup main body is smooth, it is easy to form a printed picture, and a heat insulating paper cup having excellent design can be obtained. At the lower edge of the heat insulating cover in the heat insulating paper cup, an inward bent portion, an inward V-shaped bent portion, an inward two-stage bent portion, and an inward double bent portion are formed, respectively. With this configuration, between the paper cup body and the heat insulating cover,
A gap corresponding to the diameter of the inward curl portion is formed in the upper portion, and a gap corresponding to the thickness of the bent portion can be formed in the lower portion, so that a gap having a substantially uniform gap in the vertical direction can be secured, which is excellent. Heat insulation is obtained. Since the inward curl portion is formed at the lower edge of the heat insulating cover in the heat insulating paper cup, a gap corresponding to the diameter of the inward curl portion is formed between the upper portion and the lower portion between the paper cup body and the heat insulating cover. Excellent heat insulation is obtained.
In the above-described heat-insulating paper cup, a gap between the paper-cup body and the heat-insulating cover is secured over the entire length of the heat-insulating paper cup by setting the length of the heat-insulating cover in the vertical direction to be substantially the same as the length of the paper cup body in the vertical direction. As a result, excellent heat insulating properties can be obtained. In the above-described heat-insulating paper cup, the length of the heat-insulating cover in the vertical direction is １ ／ to ／ of the length of the paper cup main body in the vertical direction, and is attached to the upper portion of the paper cup main body. By doing so, when the upper portion of the heat-insulating paper cup is grasped and lifted, the inward bending of the heat-insulating cover is reduced at the portion grasped by hand, and the gap between the paper cup body and the heat-insulating cover can be secured, so that better heat insulation is achieved. Property is obtained. Further, since the development area of the heat-insulating cover is reduced, the number of materials constituting the heat-insulating cover can be reduced, and the cost can be increased.

[Brief description of the drawings]

FIG. 1 is a side view showing a half of a first embodiment of the present invention in cross section.

FIG. 2 is a side view showing a half of the second embodiment of the present invention in cross section.

FIG. 3 is a side view showing a half of a third embodiment of the present invention in cross section.

FIG. 4 is a side view showing a half of a fourth embodiment of the present invention in cross section.

FIG. 5 is a side view showing a half of a fifth embodiment of the present invention in cross section.

FIG. 6 is a side view showing a half of a sixth embodiment of the present invention in cross section.

FIG. 7 is a side view showing a half of a seventh embodiment of the present invention in cross section.

FIG. 8 is a side view showing a half of the eighth embodiment of the present invention in cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper cup main body 11 Body 12 Bottom 13 Outward curl part 14 Outward flat curl part 2a, 2b, 2c, 2d, 2e, 2f, 2g Heat insulation cover 21 Body part 22, 24 Inward curl part 23a Bent part 23b V-shaped fold Curved part 23c Double-step bent part 23d Double bent part 4 Air gap

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E067 AA03 AA11 AB01 AB26 BA01C BA07B BB01B BB01C BB15B BB25B BC01B BC01C CA18 EA17 FA04 FB20 FC03 GA11

Claims (8)

[Claims] 1. An inverted frustoconical paper cup body having an outward curl portion at an opening edge, and a heat insulating cover attached to an outer surface of a body portion of the paper cup body, wherein an inward curl portion is provided at an upper edge of the heat insulating cover. A heat-insulating paper cup characterized by being formed. 2. The heat-insulating paper cup according to claim 1, wherein an inward bent portion is formed at a lower edge of the heat-insulating cover. 3. The heat-insulating paper cup according to claim 1, wherein an inward V-shaped bent portion is formed at a lower edge of the heat-insulating cover. 4. The heat-insulating paper cup according to claim 1, wherein a two-step bent portion inward is formed at a lower edge of the heat-insulating cover. 5. The heat-insulating paper cup according to claim 1, wherein a double-folded portion inward is formed at a lower edge of the heat-insulating cover. 6. The heat insulating paper cup according to claim 1, wherein an inward curl portion is formed at a lower edge of the heat insulating cover. 7. The heat-insulating paper cup according to claim 1, wherein the length of the heat-insulating cover in the vertical direction is substantially the same as the length of the paper cup body in the vertical direction. . 8. The vertical length of the heat-insulating cover is １ ／ to ／ of the vertical length of the paper cup body, and is attached to the upper portion of the paper cup body. The heat-insulating paper cup according to any one of claims 1 to 6, wherein