JP3047763B2 - Insulated cup and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated cup and a method for producing the same, and more particularly to an insulated cup for so-called instant foods and beverages in which hot water is poured into the contents for eating.

[0002]

2. Description of the Related Art As this kind of heat insulating cup, there is known a heat insulating cup in which the periphery of a paper cup body is covered with a paper protective cover having a heat insulating structure. The cup constructed in this way,
There is an advantage that the disposal process is easy and the material can be reused if necessary.

Japanese Utility Model Laid-Open Publication No. 50-27080 discloses a cup in which cardboard is wound around and adhered to a cup body. The corrugated cardboard is composed of two sheets of flat cardboard or liner paper, and corrugated paper as a core sandwiched between them.

Japanese Utility Model Laid-Open Publication No. 6-39717 discloses a cup in which embossed paper having a point-like emboss is wound around and adhered to a cup body. The publication also discloses a cup in which embossed paper and outer liner paper are wrapped around and affixed to the periphery of the cup body.

[0005]

Problems to be Solved by the Invention
In the cup disclosed in No. 0, when rolling the corrugated cardboard so as to conform to the shape of the cup body, it is necessary to form both inner and outer liner papers having strong stiffness into truncated cones having different circumferential lengths from each other, There is a problem that the processing operation is difficult. Also, because of this, the restoring force is easily generated in the cardboard,
This may cause the cardboard to peel off from the cup body. Further, if the cardboard is forcibly processed so as to suppress the restoring force, wrinkles are formed on the liner paper and the appearance is deteriorated. As a technique for addressing these problems, Japanese Patent Application Laid-Open No. 54-1178
Discloses a method of making a number of cuts in the outer liner paper and rolling it into a cylindrical shape. However, a cylindrical body formed by such a method not only impairs the heat insulating property but also does not have a very good appearance.

In the cup disclosed in Japanese Utility Model Unexamined Publication No. Hei 6-39717, the adhesion between the cup body and the embossed paper depends on a large number of point contact portions. Problems arise. In particular, when the embossed paper is adhered while being wound around the cup body, an insufficient adhesive state may be obtained. Further, since the embossed paper has different elasticity in each part due to processing, the embossed paper is easily deformed with time and is easily bent in a wavy shape. For this reason, the workability in the post-process may be deteriorated, and peeling may occur even after attaching to the cup. Further, when stocking embossed paper that has been cut into a predetermined size in advance, it is difficult to automatically feed the sheet in a sheet-by-sheet manner because the upper and lower embossed papers are fitted together. For this reason, when the embossed paper is attached to the cup body or the liner paper, the work must be performed while feeding the raw material sheet of the embossed paper from the roll, which limits the manufacturing method and apparatus and impairs mass productivity.

In the structure disclosed in the above publications, in which the liner paper is directly adhered to the outside of the corrugated paper or embossed paper, the surface shape of the lower corrugated paper or embossed paper is formed on the surface of the liner paper. There is also a problem that irregularities may be imitated, or traces (press marks) at the time of sticking may remain, and the appearance may be impaired.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide an insulated cup which is excellent in mass productivity and inexpensive, and a method of manufacturing the same. Another object of the present invention is to provide a heat insulating cup having a desired appearance and a method for manufacturing the same. Another object of the present invention is to provide a heat insulating cup having good adhesion between the cup body and the protective cover, and a method for manufacturing the same.

[0009]

A heat insulating cup according to a first aspect of the present invention has a paper cup body, an embossment formed substantially entirely, and covers the periphery of the side surface of the cup body. Embossed paper, a thin paper covering the embossed paper and affixed thereto, and a liner paper covering the thin paper and affixed thereto, wherein the basis weight of the thin paper is 20 g / M ^{2 to} 100 g / m ² .

A method of manufacturing a heat insulating cup according to a first aspect of the present invention includes the steps of: adhering the embossed paper sheet and the thin paper sheet to form a first intermediate product; Attaching a raw material sheet of the liner paper to the surface of the intermediate product on the thin paper side to form a second intermediate product; cutting the second intermediate product to a size around the side surface of the cup body; Forming a third intermediate product having an adapted size, and attaching a surface of the third intermediate product on the side of the embossed paper to the periphery of the side surface of the cup body. I do.

[0011] A heat insulating cup according to a second aspect of the present invention comprises:
A paper cup body, a thin paper covering the side surface of the cup body and affixed to the same, and an embossed paper covering the thin paper and affixing the thin paper while embossing is formed substantially entirely. And a liner paper covering the embossed paper and affixed thereto, wherein the basis weight of the thin paper is 20.
characterized in that it is a ^{g / m 2 ~100g / m 2} .

According to a second aspect of the present invention, there is provided a method of manufacturing a heat-insulating cup, comprising: adhering the raw sheet of thin paper and the raw sheet of embossed paper to form a first intermediate product; Attaching a raw sheet of the liner paper to a surface of the intermediate product on the embossed paper side to form a second intermediate product;
Cutting the second intermediate product to form a third intermediate product having dimensions adapted to the dimensions of the side surface periphery of the cup body; and removing the thin paper side surface of the third intermediate product to the cup Adhering around the side surface of the main body.

A heat insulating cup according to a third aspect of the present invention comprises:
A paper cup body, a first thin paper covering the side surface of the cup body and affixed thereto, and an embossing formed substantially entirely and covering the first thin paper and affixing thereto; Said first embossed paper, said second embossed paper covering said embossed paper and adhered thereto, and said liner paper covering said second embossed paper and adhered thereto. And the basis weight of the second thin paper is 20 g / m ^{2 to} 100 g
/ M ² .

A method of manufacturing a heat insulating cup according to a third aspect of the present invention is characterized in that the first and second thin material sheets are attached to both surfaces of the embossed material sheet to form a first intermediate product. Forming, attaching a raw sheet of the liner paper to a surface of the first intermediate product on the second thin paper side to form a second intermediate product, and cutting the second intermediate product Forming a third intermediate product having a size adapted to the size of the periphery of the side surface of the cup body; and placing the first thin paper side surface of the third intermediate product around the side surface of the cup body. Affixing step.

[0015]

The thin paper disposed between the cup body and the embossed paper makes the cup body and the protective cover in surface contact with each other to improve their adhesiveness, as well as automatic roll feeding of the embossed paper and automatic sheet feeding. Makes paper feeding easier. In particular, since the embossed paper is sandwiched between the thin paper and the liner paper, temporal deformation such as warpage of the embossed paper is suppressed. The thin paper disposed between the embossed paper and the liner paper prevents irregularities following the surface shape of the embossed paper from being generated on the liner paper, and prevents traces of sticking from being left and impairing the appearance. To facilitate automatic roll feeding and automatic sheet feeding of embossed paper. By using a dot pattern arranged in an inclined lattice shape as the emboss, characteristics excellent in both heat insulating properties and heat retaining properties can be obtained.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway front view showing a heat insulating cup according to a first embodiment of the present invention, and FIG. 2 is a partial sectional view taken along the line II-II.

The cup body 12 has a paper-made side wall 14 formed as a truncated cone-shaped tube, and a bottom wall 16 that closes the small diameter end of the side wall 14. The inner surface of the paper constituting the side wall 14 and the bottom wall 16 is coated with a polyethylene film of 20 μm to 40 μm. The large-diameter end, that is, the open end side, of the side wall 14 is bent outward to form an edge ring 18. The rim ring 18 is used to reinforce the cup body 12 and to attach a cap or a sheet-like lid (not shown). As the cup body 12, for example, a paper container commonly called a 9 oz to 13 oz hot cup can be used.

A protective cover 20 is disposed so as to cover substantially the entire periphery of the side surface of the cup body 12, ie, the outer surface of the side wall 14. The protective cover 20 includes a first thin paper 22 adhered so as to cover the entire outer surface of the side wall 14, an embossed paper 24 adhered so as to cover the entire first thin paper 22, and an entire embossed paper 24. Second thin paper 26 stuck so as to cover
And a liner paper 28 stuck so as to cover the entire second thin paper 26 to form a multilayer structure.

The first thin paper 22 has a milky white, medium (pure white roll) characteristic, and has a basis weight of about 30 g / m ² . The second thin paper 26 also has milky white and medium (pure white roll) properties, and has a basis weight of about 30 g / m ² .

The first thin paper 22 cooperates with the liner paper 28 to prevent the warpage of the embossed paper 25, to improve the adhesiveness between the cup body 12 and the protective cover 20, and to automatically roll the embossed paper 24. It is used for the purpose of improving mass productivity of the heat insulating cup by facilitating sheet feeding and automatic sheet feeding. Therefore, the first thin paper 22
It is desirable that the material has some strength and low rigidity. The basis weight of the desired range of the first thin paper 22 is ^{20g / m 2 ~100g / m 2} . If it is more than this range, the rigidity becomes too high, and the workability of the protective cover 20 decreases. If it is less than this range, the rigidity and strength are reduced, the protective cover 20 is easily broken during manufacture, and the function of preventing the warpage of the embossed paper is insufficient.

The second thin paper 26 prevents the liner paper 28 from having irregularities in accordance with the surface shape of the embossed paper 24, and prevents the appearance of the liner paper 28 from being impaired by leaving traces of sticking.
It is used for the purpose of facilitating the roll automatic feeding of the embossed paper 24 and the sheet-feed automatic feeding to improve the mass productivity of the heat insulating cup. Therefore, the second thin paper 2
It is desirable that 6 has a certain strength and low rigidity. The basis weight of the desired range of the second thin paper 26 is ^{20g / m 2 ~100g / m 2} . If it is more than this range, the rigidity becomes too high, and the workability of the protective cover 20 decreases. If it is less than this range, the rigidity and strength are reduced, and the protective cover 20 is easily broken during manufacturing.

The embossed paper 24 is made of white bleached kraft paper and has a basis weight of 120 g / m ² . Embossed paper 2
4 is formed with embosses 25 composed of a number of points arranged as a lattice inclined at about 45 degrees with respect to the central axis of the cup body 12. More specifically, the point of the emboss 25 is constituted by circular convex portions and circular concave portions each having a diameter of about 3.5 mm, which are alternately arranged at equal intervals. The protrusions and the recesses are arranged as a square lattice that is inclined at about 45 degrees with respect to the center axis of the cup body 12 and that complementarily overlaps each other. The density of the emboss 25 is 7 / cm ^{2 in} total of the convex portions and the concave portions. The height of the emboss 25 (difference in height between the convex and concave portions) is uniform over the entire embossed paper 24 and is about 2 m.
m.

The shape and dimensions of the emboss 25 substantially define the insulating air layer formed in the protective cover 20. In consideration of both the heat insulating property and the heat retaining property of the heat insulating cup, the desirable range of the diameter of the projections and the depressions of the dot pattern is 2 mm to 5 mm. A desirable range of the height of the emboss 25 is 1 mm to 5 mm. Emboss 25
A desirable range of the density is 3 / total of the convex portions and the concave portions.
cm ² to 10 / cm ² . As the pattern of the emboss 25, other patterns such as a rectangular lattice pattern composed of a large number of rectangles having substantially the same size as the circular point, a corrugated pattern, etc. can be adopted instead of the above-mentioned circular point lattice pattern.

The embossed paper 24 must have such strength that the embossed paper 25 cannot be crushed by normal use, but must be easy to process. From this viewpoint, the desirable range of the basis weight of the embossed paper 24 is 50 / m ^{2 to} 180
g / m ² .

The basis weight of the liner paper 28 is 230 g / m ^2.
On the front side, characters and designs relating to the product are applied by offset printing. The basis weight of the desired range of the liner sheet 28 is ^{180g / m 2 ~270g / m 2} .
If it is more than this range, the rigidity becomes too high, and the workability of the protective cover 20 decreases. If it is less than this range, the rigidity and strength are reduced, and irregularities following the emboss 25 are generated on the surface, or the protective cover 20 is easily broken during transportation or storage after being attached to the cup body 12.

The components of the cup body 12, the first thin paper 22, the embossed paper 24, the second thin paper 26, and the liner paper 28 are respectively adhered with synthetic glue, for example, EVA glue. In addition, various known pastes can be used as the paste.

Next, a method of manufacturing the heat insulating cup according to the first embodiment of the present invention will be described. First, an emboss 25 is formed on a white bleached kraft paper sheet by a known roll-type roll embossing apparatus, and a raw material sheet of the embossed paper 24 is adjusted. Next, the raw material sheets of the first and second thin papers 22 and 26 are pasted on both sides of the raw material sheet of the embossed paper 24 with glue, respectively, using a known winding type laminating device linked to a roll embossing device. To wear.

Next, the embossed paper 24 adhered to each other,
The raw material sheets of the first and second thin papers 22 and 26 are cut to form a first intermediate product. The first intermediate product is set to a size such that a plurality of protective covers 20 can be obtained.

On the other hand, printing is performed by offset printing on the surface of the raw material sheet of the liner paper 28 cut to the same size as the first intermediate product. By this printing, characters and designs relating to the product corresponding to the plurality of protective covers 20 are applied to the surface of the liner paper 28.

Then, the back surface of the raw material sheet of the liner paper 28 is adhered to the surface of the first intermediate product on the side of the second thin paper 26 with glue to form a second intermediate product. At this time, embossed paper 2
The first and second thin papers 2 are already provided on both sides of the raw material sheet of No. 4.
Since the raw material sheets 2 and 26 are attached to each other, even when a plurality of first intermediate products are stacked, the unevenness of the upper and lower embosses 25 does not fit each other. Therefore, the first intermediate product can be adhered to the liner paper 28 while automatically feeding the single intermediate sheet, and mass productivity is improved. In addition, by the second thin paper 26,
It is possible to prevent traces from being left on the liner paper 28 at the time of sticking or irregularities following the surface shape of the embossed paper 24 to prevent the appearance from being impaired.

Next, the second intermediate product is punched and cut to form a sector-shaped third intermediate product, that is, a protective cover 20 having a size adapted to the size of the periphery of the side surface of the cup body 12. Then, the first thin paper 2 of the protective cover 20 is
The two surfaces are adhered by glue while being wound around the side surface of the cup body 12. When this winding method is adopted, the protective cover 20 can be attached to the cup body 12 in a state where both ends thereof are abutted without overlapping.

The protective cover 20 is fixed to the cup body 12 by sticking the first thin paper 22 and the side wall 14 of the cup body 12 with glue. Therefore, the protective cover 2
Even if 0 is attached to the cup body 12 while being wound, reliable adhesion between the two members 12 and 20 can be obtained. Also, the first
The second thin papers 22 and 26 and the embossed paper 24 are adhered via a point contact portion of the emboss 25. The operation of attaching these members may be performed on a flat surface or a surface having a large radius of curvature. The first and second thin papers 22, 2
Since 6 is also deformable, there is no problem in adhesiveness.

In place of the method of winding the protective cover 20, the protective cover 20 is preliminarily assembled into a truncated cone having substantially the same shape as the side wall 14 of the cup body 12 using only the third intermediate product.
A method of attaching the protective cover 20 while fitting the protective cover 20 into the cup body 12 may be employed. In this case, the protective cover 20 is formed with its both ends overlapped.

In the above-mentioned manufacturing method, when the second intermediate product is produced, the first intermediate product is automatically fed in a single sheet. Alternatively, automatic roll feeding may be used. That is, the raw material sheets of the first and second thin papers 22 and 26 are respectively adhered to both surfaces of the raw material sheet of the embossed paper 24, and these are wound on a roll as uncut first intermediate products. On the other hand, the liner paper 28 is also continuously printed on the surface of the raw material sheet before cutting, and is wound on another roll. Then, while simultaneously feeding the uncut first intermediate product and the raw material sheet of the liner paper 28 from the roll, the raw material sheet of the liner paper 28 is attached to the surface of the first intermediate product on the side of the second thin paper 26. Then, by cutting it, a second intermediate product having the same dimensions as the above-described method can be formed, or a third intermediate product having a fan shape, that is, the protective cover 20 can be directly formed.

FIG. 3 is a partially cutaway front view showing a heat insulating cup according to a second embodiment of the present invention, and FIG. 4 is a partial sectional view taken along the line IV-IV. In both figures, the same members as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description will be made only as necessary.

The protective cover 20A of the second embodiment does not include the first thin paper 22 and has an embossed paper 24 attached so as to cover the entire outer surface of the side wall 14 of the cup body 12, and an entire embossed paper 24. Second thin paper 26 stuck so as to cover
And a liner paper 28 stuck so as to cover the entire second thin paper 26 to form a multilayer structure. Each paper 24, 2
The dimensions, structure, function, and desirable conditions of 6 and 28, and the conditions of glue for attaching these papers are the same as those in the first embodiment. Hereinafter, the second thin paper 26 which is a feature of the second embodiment will be described again.

The second thin paper 26 has milky white and medium (pure white roll) characteristics, and has a basis weight of about 30 g / m ² . The second thin paper 26 is formed by embossing paper 2 on liner paper 28.
4 to prevent irregularities following the surface shape of No. 4 from occurring, and to prevent the appearance from being impaired by leaving traces at the time of sticking, and to facilitate automatic roll feeding and automatic sheet feeding of the embossed paper 24. It is used for the purpose of improving mass productivity of the heat insulating cup. Therefore, it is desirable that the second thin paper 26 has some strength and low rigidity. A desirable range of the basis weight of the second thin paper 26 is 20
a ^{g / m 2 ~100g / m 2} . If it is more than this range, the rigidity becomes too high, and the workability of the protective cover 20A decreases. If it is below this range, rigidity and strength decrease,
The protective cover 20A is easily broken during manufacturing.

Next, a method of manufacturing a heat insulating cup according to a second embodiment of the present invention will be described. First, an emboss 25 is formed on a white bleached kraft paper sheet by a known roll-type roll embossing apparatus, and a raw material sheet of the embossed paper 24 is adjusted. Next, the raw material sheet of the second thin paper 26 is adhered to the raw material sheet of the embossed paper 24 with glue using a known winding type laminating device linked to the roll embossing device.

Next, the embossed paper 24 attached to each other,
The raw material sheet of the second thin paper 26 is cut to form a first intermediate product. The first intermediate product is set to a size that allows a plurality of protective covers 20A to be obtained.

On the other hand, printing is performed by offset printing on the surface of the raw material sheet of the liner paper 28 cut to the same size as the first intermediate product. By this printing, characters and designs relating to the product corresponding to the plurality of protective covers 20A are applied to the surface of the liner paper 28.

Then, the back surface of the material sheet of the liner paper 28 is adhered to the surface of the first intermediate product on the side of the second thin paper 26 with glue to form a second intermediate product. At this time, embossed paper 2
Since the raw material sheet of the second thin paper 26 is already stuck to one side of the raw material sheet of No. 4, even if a plurality of first intermediate products are stacked, the unevenness of the upper and lower embosses 25 fit together. There is no. Therefore, the first intermediate product can be adhered to the liner paper 28 while automatically feeding the single intermediate sheet, and mass productivity is improved. In addition, the second thin paper 26 prevents traces of sticking to the liner paper 28 from being left or irregularities following the surface shape of the embossed paper 24, thereby preventing the appearance from being impaired.

Next, the second intermediate product is stamped and cut to form a fan-shaped third intermediate product, that is, a protective cover 20A having a size adapted to the size of the periphery of the side surface of the cup body 12. Then, the surface of the protective cover 20 </ b> A on the side of the embossed paper 24 is wound around the side surface of the cup main body 12 by the winding device and adhered by the glue. Instead of this winding method, a method is adopted in which the protective cover 20A is assembled in advance into a substantially truncated conical shape with the side wall 14 of the cup body 12 using only the third intermediate product, and then the protective cover 20A is attached to the cup body 12 while being fitted thereto. You can also.

In the above-described manufacturing method, when the second intermediate product is produced, the first intermediate product is automatically fed in sheet-by-sheet manner. However, instead of this, automatic roll feeding can be used. That is, the material sheet of the second thin paper 26 is stuck to the material sheet of the embossed paper 24, and this is wound on a roll as an uncut first intermediate product. On the other hand, the liner paper 28 is also continuously printed on the surface of the raw material sheet before cutting, and is wound on another roll. Then, the uncut first intermediate product and the liner paper 2
The raw material sheet of the liner paper 28 is adhered to the surface of the first intermediate product on the side of the second thin paper 26 while simultaneously feeding the raw material sheet of No. 8 from the roll. Next, by cutting this, a second intermediate product having the same dimensions as the above-described method can be formed, or a third intermediate product having a fan shape, that is, the protective cover 20A can be formed.
Can be formed directly.

FIG. 5 is a partially cutaway front view showing a heat insulating cup according to a third embodiment of the present invention, and FIG. 6 is a partial sectional view taken along the line VI-VI of FIG. In both figures, the same members as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description will be made only as necessary.

The protective cover 20 B of the third embodiment does not include the second thin paper 26, but includes the first thin paper 22 adhered so as to cover the entire outer surface of the side wall 14 of the cup body 12, and the first thin paper 22. Embossed paper 24 stuck so as to cover the entire thin paper 22
And a liner paper 28 adhered so as to cover the entire embossed paper 24 to form a multilayer structure. Each paper 22, 2
The dimensions, structure, function, and desirable conditions of 4 and 28, and the conditions of glue for attaching these papers are the same as those in the first embodiment. Hereinafter, the first thin paper 22 which is a feature of the third embodiment will be described again.

The first thin paper 22 has a milky white and medium (pure white roll) characteristic, and has a basis weight of about 30 g / m ² . The first thin paper 22 cooperates with the liner paper 28 to prevent the warpage of the embossed paper 25, to improve the adhesiveness between the cup body 12 and the protective cover 20B, to perform automatic roll feeding of the embossed paper 24, and It is used for the purpose of improving mass productivity of the heat insulating cup by facilitating automatic sheet feeding. Therefore, it is desirable that the first thin paper 22 has some strength and low rigidity. A desirable range of the basis weight of the first thin paper 22 is 20
a ^{g / m 2 ~100g / m 2} . If it is more than this range, the rigidity becomes too high, and the workability of the protective cover 20B decreases. If it is below this range, rigidity and strength decrease,
The protective cover 20B is easily torn during manufacture, and the function of preventing warpage of the embossed paper becomes insufficient.

Next, a method of manufacturing a heat insulating cup according to a third embodiment of the present invention will be described. First, an emboss 25 is formed on a white bleached kraft paper sheet by a known roll-type roll embossing apparatus, and a raw material sheet of the embossed paper 24 is adjusted. Next, the raw material sheet of the first thin paper 22 is adhered to the raw material sheet of the embossed paper 24 with glue by using a known winding type laminating device linked to a roll embossing device.

Next, embossed paper 24 adhered to each other,
The raw material sheet of the first thin paper 22 is cut to form a first intermediate product. The first intermediate product is set to a size that allows a plurality of protective covers 20B to be obtained.

On the other hand, printing is performed by offset printing on the surface of the raw material sheet of the liner paper 28 cut to the same size as the first intermediate product. By this printing, characters and designs related to the product corresponding to the plurality of protective covers 20B are applied to the surface of the liner paper 28.

Then, the back surface of the raw material sheet of the liner paper 28 is adhered to the surface of the first intermediate product on the side of the embossed paper 24 with glue to form a second intermediate product. At this time, embossed paper 2
Since the raw material sheet of the first thin paper 22 is already stuck on one side of the raw material sheet of No. 4, even if a plurality of the first intermediate products are stacked, the unevenness of the upper and lower embosses 25 fit together. There is no. Therefore, the first intermediate product can be adhered to the liner paper 28 while automatically feeding the single intermediate sheet, and mass productivity is improved.

Next, the second intermediate product is stamped and cut to form a fan-shaped third intermediate product having a size adapted to the size of the periphery of the side surface of the cup body 12, ie, a protective cover 20B. Then, the surface of the protective cover 20B on the side of the first thin paper 22 is wound around the side surface of the cup body 12 with a glue and adhered by the winding device. Instead of this winding method, a method of assembling the protective cover 20B in advance into a substantially frustoconical shape substantially the same as the side wall 14 of the cup main body 12 using only the third intermediate product, and then attaching the protective cover 20B to the cup main body 12 while adhering thereto is adopted. You can also.

The protective cover 20B is fixed to the cup body 12 by sticking the first thin paper 22 and the side wall 14 of the cup body 12 with glue. Therefore, even if the protective cover 20B is adhered to the cup body 12 while being wound,
Reliable adhesion between the two members 12, 20B is obtained. In addition, the liner paper 28 and the embossed paper 24 are
The members are attached via the point contact portion of No. 5, but since the attaching operation of these members can be performed on a flat surface or a surface having a large radius of curvature, there is no problem in adhesiveness.

In the above-described manufacturing method, when the second intermediate product is produced, the first intermediate product is automatically fed one by one. However, instead of this, automatic roll feeding can be used. That is, the raw material sheet of the first thin paper 22 is attached to the raw material sheet of the embossed paper 24, and this is wound on a roll as an uncut first intermediate product. On the other hand, the liner paper 28 is also continuously printed on the surface of the raw material sheet before cutting, and is wound on another roll. Then, the uncut first intermediate product and the liner paper 2
While simultaneously feeding the raw material sheet of No. 8 from the roll, the raw material sheet of the liner paper 28 is adhered to the surface of the first intermediate product on the side of the embossed paper 24. Next, by cutting this, a second intermediate product having the same dimensions as the above-described method can be formed, or a third intermediate product having a fan shape, that is, the protective cover 20B can be formed.
Can be formed directly.

[0054]

In the heat-insulating cup according to the present invention, the first thin paper makes the cup body and the protective cover come into surface contact with each other, so that the adhesion between them is improved. Further, since the embossed paper is sandwiched between the first thin paper and the liner paper, temporal deformation such as warpage of the embossed paper is suppressed, and the adhesiveness between the cup body and the protective cover is further ensured. You. In addition, the second thin paper prevents the liner paper from having irregularities following the surface shape of the embossed paper, and prevents the appearance of the liner paper from being impaired by leaving traces of sticking.

According to the method of manufacturing the heat insulating cup according to the present invention, at least one of the first and second thin papers is pasted on the embossed paper in advance, so that the embossed paper is automatically fed into the roll and the sheet is automatically fed. Becomes easier. Further, the cooperation between the first thin paper and the liner paper suppresses temporal deformation such as warpage of the embossed paper, and improves workability in the manufacturing process of the heat insulating cup. Accordingly, it is possible to improve the mass productivity and reduce the cost of the heat insulating cup.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a heat insulating cup according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view along the line II-II in FIG.

FIG. 3 is a partially cutaway front view showing a heat insulating cup according to a second embodiment of the present invention.

FIG. 4 is a partial sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a partially cutaway front view showing a heat insulating cup according to a third embodiment of the present invention.

FIG. 6 is a partial cross-sectional view along the line VI-VI in FIG. 5;

[Explanation of symbols]

12 ... cup body, 14 ... side wall, 16 ... bottom wall, 18 ... edge ring, 20, 20A20B ... protective cover, 22 ... first
Thin paper, 24 ... embossed paper, 26 ... second thin paper, 28 ...
Liner paper.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Jun Sada 1-5-1, Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd. (56) References JP-A 5-84621 (JP, U) JP-A 52 -152043 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B65D 81/38 B65D 3/22

Claims (6)

(57) [Claims] 1. A paper cup body, an embossed paper formed substantially over the entire surface and embossed over the side surface of the cup body and adhered thereto, and an embossed paper covering and embossing the embossed paper. and adhered to a thin, heat-insulating cup comprising a liner sheet and is adhered thereto covering the thin paper, and wherein the basis weight of the thin paper is 20g / m ² ~100g / m ² . 2. A paper cup body, an embossed paper which is substantially entirely formed and covers the side surface of the cup body and is adhered to the embossed paper, and the embossed paper is covered and covered by the embossed paper. and stuck to the thin paper, anda liner paper and is adhered to cover the thin paper, the basis weight of the thin paper a method of manufacturing the heat insulating cup is 20g / m ² ~100g / m ² Bonding a raw sheet of the embossed paper and a raw sheet of the thin paper to form a first intermediate product; and bonding the raw sheet of the liner paper to the thin paper side surface of the first intermediate product. Forming a second intermediate product by forming the second intermediate product; cutting the second intermediate product to form a third intermediate product having a size adapted to a size around the side surface of the cup body; Place the surface of the third intermediate product on the embossed paper side Method characterized by comprising the steps of sticking to the side periphery of the body. 3. A paper cup body, and a thin paper covering the periphery of the side surface of the cup body and affixed to the same, and the emboss is formed substantially entirely, and the thin paper is covered and affixed thereto. insulation cup to the embossed paper that is, anda liner paper and is adhered to cover the embossed paper, wherein the basis weight of the thin paper is 20g / m ² ~100g / m ² . 4. A paper cup body, and a thin paper covering the periphery of the side surface of the cup body and affixed to the same. The emboss is formed substantially entirely, and the thin paper is covered and affixed to the thin paper. and the embossed paper that is, anda liner paper and is adhered to cover the embossed paper, the basis weight of the thin paper a method of manufacturing the heat insulating cup is 20g / m ² ~100g / m ² Attaching a raw sheet of the thin paper and a raw sheet of the embossed paper to form a first intermediate product; and applying the raw material sheet of the liner paper to the surface of the first intermediate product on the embossed paper side. Adhering to form a second intermediate product; cutting the second intermediate product to form a third intermediate product having a size adapted to the size of the circumference of the side surface of the cup body; Place the surface of the third intermediate product on the thin paper side Method characterized by comprising the steps of sticking to the side periphery of the body. 5. A paper cup body, a first thin paper covering the periphery of a side surface of the cup body and affixed thereto, and the first thin paper is formed substantially entirely in embossment. An embossed paper covering and affixed thereto, a second thin paper covering the embossed paper and affixed thereto, and a liner paper covering the second thin paper and affixed thereto. And the basis weight of the first and second thin papers is 20 g / m
A heat insulating cup having a weight of ^{2 to} 100 g / m ² . 6. A paper cup body, a first thin paper covering the periphery of a side surface of the cup body and affixed to the same, and the first thin paper is formed substantially entirely on the embossment. An embossed paper covering and affixed thereto, a second thin paper covering the embossed paper and affixed thereto, and a liner paper covering the second thin paper and affixed thereto. And the basis weight of the first and second thin papers is 20 g / m
^{2 to} 100 g / m ² , wherein the first and second insulating sheets are provided on both sides of a material sheet of the embossed paper.
Forming a first intermediate product by adhering the thin paper material sheets of each of the above, and bonding the liner paper raw material sheet to the surface of the first intermediate product on the second thin paper side. Forming a third intermediate product; cutting the second intermediate product to form a third intermediate product having a size adapted to a size around the side surface of the cup body; Affixing a first thin paper side surface around the side surface of the cup body.