TWI816734B - paper cover - Google Patents

Abstract

An object of the present invention is to provide a paper lid that is easy to use. The paper lid includes a main body made of paper material, and a tapered part having a tapered shape opposite to the tapered shape so as to be attached to a container having an opening and a tapered shape.

Description

paper cover

The present invention relates to a paper lid and a manufacturing method thereof, and to a paper lid suitable for liquid containers and a manufacturing method thereof.

Paper cups are used as containers for various beverages such as coffee and tea. Close the lid so that the contents do not leak out of the paper cup. Most of these covers are made of plastic, which is inconsistent with the recent trend of reducing plastic and using environmentally friendly products. Furthermore, it has been proposed to use the bottom part of the paper cup as a paper lid, but convenience of use has not been considered (Patent Document 1).

[Prior technical literature]

[Patent Document]

Patent Document 1: Japanese Patent Application Publication No. 2006-248530

In Patent Document 1, the conical shape of the paper cup and the conical shape of the cover are forward conical shapes. When the paper cup is tilted, the contents It may leak and may not be convenient to use. Furthermore, Patent Document 1 only proposes a cover made of paper, and has not yet conducted detailed research, so the usability is insufficient.

The present invention was made in view of the above-mentioned points, and an object thereof is to provide a paper lid with excellent usability.

The paper lid according to claim 1 includes: a lid main body made of paper material, which is attached to a container having an opening, a tapered shape, and a curling portion; and a first engaging portion, which is provided on the main body and has the above-mentioned A tapered shape facing the same direction is engaged with the curled portion from the outside of the curled portion; and a main body side curled portion is provided on the main body and is located above the first engaging portion.

The method of manufacturing a paper lid according to Claim 14 includes the steps of: providing a drinking mouth portion and a sealing portion joined to the top lid portion and the drinking mouth portion on a top lid made of paper material; and forming a The step of joining the drinking mouth part and the top cover part of the sealing part to a tapered part having a tapered shape and using a paper material.

In the method of manufacturing a paper lid according to claim 17, the paper lid is mounted on a container having an opening, a tapered shape, and a curled portion, and the manufacturing method includes using a fan-shaped paper material to form the curled portion. The step of deforming and engaging the engaging portion; and the step of joining the top cover portion to the aforementioned engaging portion.

In the paper cover described in Claim 1, the sealing property of the paper cover is improved, and the usability of the paper cover can be improved.

In the method of manufacturing a paper lid according to claim 14, the top portion is formed with a drinking mouth portion and a sealing portion. The lid part is joined to the tapered part having a tapered shape and using a paper material. Therefore, a paper lid with good usability can be produced.

1: cover unit

2:Top cover

3: Tapered part

5: Drinking mouth

6: Groove

8:Sealing part

9: Curly part

10: mark

20:Container

21:Tapered part

22: Curly part

30: Bracket

31:hinge

Fig. 1 is a cross-sectional view of the paper cap and container according to the first embodiment.

Fig. 2 is a schematic view of the paper cover according to the first embodiment.

FIG. 3 is a reference diagram showing a plastic cap.

Fig. 4 is a cross-sectional view of the paper cap and container according to the second embodiment.

Fig. 5 is a schematic view of a paper cover with a stand according to a third embodiment.

FIG. 6 is a schematic view of a paper cover with a bracket according to the fourth embodiment.

FIG. 7 shows an example in which a handle and a bracket are provided on the paper cover.

Fig. 8 is a schematic view of a paper cover according to the fifth embodiment.

Fig. 9 is a schematic view of a paper lid according to the sixth embodiment.

Fig. 10 is a diagram showing a method of manufacturing a paper lid according to the sixth embodiment.

FIG. 11 is a diagram showing a method of manufacturing a paper lid according to the sixth embodiment.

FIG. 12 is a diagram showing another method of manufacturing a paper lid.

FIG. 13 is a diagram showing a fitting example of the curled portion.

Fig. 14 is a cross-sectional view showing a modified example of the sealing portion.

Fig. 15 is a cross-sectional view showing a modified example of the sealing portion.

Fig. 16 is a schematic view of a paper cover according to the seventh embodiment.

Fig. 17 is a cross-sectional view of a paper lid according to the seventh embodiment.

FIG. 18 is a diagram showing an example of joining the top cover part and the engaging part.

Fig. 19 is a modified example of the paper cover according to the sixth embodiment.

Fig. 20 is an enlarged cross-sectional view of the window portion of the seventh embodiment.

Fig. 21 is a modified example of the window portion of the paper cover according to the seventh embodiment.

Fig. 22 is a cross-sectional view of a paper lid according to the eighth embodiment.

Fig. 23 is a cross-sectional view showing the sealing portion of the paper lid according to the eighth embodiment.

Fig. 24 is a schematic view and a cross-sectional view showing an example of the engaging portion in Fig. 22(f).

FIG. 25 is a schematic view, a partial enlarged view, and an A-A cross-sectional view showing the display unit 40 of the paper cover 1 .

Fig. 26 is a development view of the paper cover 1 with the top cover portion 2 removed.

Fig. 27 is a cross-sectional view of a paper lid according to the eighth embodiment.

FIG. 28 is a flowchart showing an example of a method of manufacturing a paper lid.

Fig. 29 is a schematic diagram of a method of manufacturing a paper lid.

Fig. 30 is a diagram showing a method of extracting the top cover portion from the roll.

Hereinafter, embodiments of the present invention will be described using FIGS. 1 to 30 . In the embodiments, components having the same functions are denoted by the same reference numerals, and repeated descriptions are omitted or simplified.

(First Embodiment)

Fig. 1 is a cross-sectional view of the paper lid 1 and the container 20 according to the first embodiment. Fig. 1(a) is a cross-sectional view showing a state in which the paper lid 1 is removed from the container 20. Fig. 1(b) is a cross-sectional view showing the use of the paper lid 1. A cross-sectional view of the paper lid 1 fitted to the container 20 .

2 is a schematic view of the paper lid 1 of the first embodiment as viewed from above. FIG. 2(a) is a diagram showing a state in which the sealing part 8 seals the drinking spout 5. FIG. 2(b) is a diagram showing how the sealing part 8 moves from Picture of the situation when the drinking port 5 is detached. In addition, FIG. 2(c) and FIG. 2(d) are formed by bending the drinking spout 5 toward the center of the paper lid 1. In the figure, the solid line is the groove.

(paper cover)

The paper cap 1 has a top cap part 2, a tapered part 3 formed in the top cap part 2, a bottom cap part 4, a drinking spout 5, a groove part 6, an air hole part 7, and a sealing part 8.

The paper cover 1 is inserted into the inside of the container 20 and is made of paper material. As long as the paper material contains at least a cellulose component, its content is not particularly limited. In addition, paper materials formed by paper making can also be used.

As the paper material, various water-resistant papers may be used, or a coating may be provided on at least the container-side surface of the paper material. As the coating, films and coating agents can be used. Examples of the film include polyvinyl chloride, polyvinyl alcohol, polyurethane, acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, cellophane, polypropylene, nylon, and polyethylene. , polyvinylidene chloride, polymethylpentene, ethylene-vinyl alcohol copolymer, etc. Furthermore, as the film, it is desirable to use a biodegradable film such as polylactic acid.

In addition, when using a coating agent, a coating agent that has no effect on the human body, such as vegetable starch, may be used. In addition, in this embodiment, the bottom part of the paper cup can also be used as the paper lid 1 .

The top cover part 2 is formed with a step (recessed part) with a depth of approximately 3 mm to 12 mm on the lower side (container 20 side), and a tapered part 3 is formed on the side surface. The tapered portion 3 has a tapered shape opposite to the tapered portion 21 of the outer shape of the container 20 described later (an inverse taper shape), and is formed into a tapered shape that expands toward the container 20 . The dimension in the height direction of the tapered portion 3 (Z direction in FIG. 1 ) is larger than the dimension in the height direction of the curled portion 22 of the container 20 described later. Thereby, when the paper lid 1 is inserted into the inside of the container 20, even if the container 20 is knocked over, it can be lowered. Low Concern of Container 20 Contents Spilling.

When the tapered portion 3 and the tapered portion 21 are inverted tapers, the force of fitting is point contact (line contact) rather than surface contact. Therefore, the force during fitting acts more concentratedly on the surface than in the case of surface contact. Chimeric part. Therefore, the fitability between the tapered portion 3 and the tapered portion 21 is improved, so that the sealing property of the paper cover 1 is improved. In addition, since the tapered portion 3 and the tapered portion 21 are made of paper material, the tapered portion 3 and the tapered portion 21 are deformed by fitting to form a plurality of flat portions. This flat portion improves the fitability between the tapered portion 3 and the tapered portion 21 . In addition, even if the tapered portion 3 adopts a linear shape without a taper, the above-mentioned effects can be obtained. That is, the inclination of the tapered portion 3 only needs to be different from the inclination of the tapered portion 21 .

In addition, in order to improve the sealing performance of the paper lid 1, the tapered portion 3 may be provided with a concave and convex portion or a stepped portion.

The bottom cover 4 is shaped to engage with the top cover 2 . The bottom cover 4 and the top cover 2 can be engaged by various methods such as stamping processing, ultrasonic bonding, heat sealing, and adhesive (for example, starch paste).

The drinking port 5 is an opening provided in the top cover part 2 and the bottom cover part 4. It can be used as a drinking port or as a hole for inserting a straw, and its size and shape can be appropriately set. In addition, half-cut cutting lines can also be added to facilitate the user to disassemble the half-cut.

Moreover, as shown in FIG. 2(c) and FIG. 2(d) , the drinking spout 5 has a solid line slit and a part without a slit, and the part without a slit functions as a hinge. By bending the solid line slot toward the center of the paper lid 1, the drinking spout 5 is opened. In this case, the drinking spout 5 can be easily bent by adding a notch to the top cover 2 and making the bottom cover 4 an opening corresponding to the notch. In addition, as long as the cutting line forms a V-shape (inverted triangle) by cutting from the side of the top cover 2 to the bottom cover 4, the contents from the container 20 will not easily leak to the top cover when the drinking spout 5 is closed. Part 2 side. In addition, drinking port 5 The shape may be a linear shape, a curved shape, a linear shape plus a curved shape, as shown in FIG. 2(d) , or a shape that forms a pinch portion.

In addition, as long as the curled portion 9 is expanded outward corresponding to the drinking mouth 5 as shown in Figure 2(c), or the outer ring of the curled portion 9 is flattened inward as shown in Figure 2(d), it will be easier to drink. Contents from drinking port 5. In addition, instead of the outer ring of the curled portion 9 in Fig. 2(d), the inner ring may be flattened outward. Moreover, as shown in the partial enlarged view of FIG. 2(d) , the connection part 5a in which no groove is formed can also be provided in a part of the solid line groove part of the drinking spout 5. As long as the connecting portion 5a is present, it can be considered that the drinking spout 5 has not been opened. On the other hand, if there is no connection part 5a, it can be considered that the drinking spout 5 is opened. In connection with this, the connection part 5a can recognize whether the drinking spout 5 has been pranked. In addition, the position and number of the connecting portions 5a can be set arbitrarily. In addition, the connection part 5a may be formed in the drinking spout 5 of FIG.2(a)-2(c).

As shown in FIGS. 2(a) and 2(b) , the groove portion 6 is a rib provided on the top cover portion 2 by, for example, stamping processing, and does not penetrate the top cover portion 2 . In this embodiment, a plurality of groove portions 6 are provided and connected to the drinking spout 5 . When the contents of the container 20 are accumulated in the recessed portion (step portion) of the top cover 2 from the drinking spout 5, the groove portion 6 guides the contents accumulated in the recessed portion of the top cover 2 to the drinking spout 5, and then The contents are returned to container 20.

In addition, by forming the groove portion 6 by press processing, the strength of the top cover portion 2 and even the paper cover 1 can be improved.

As shown in FIGS. 2(c) and 2(d) , a groove 6 may be provided from the drinking spout 5 to the curling part 9 . In addition, the groove portion 6 may be formed to reach the edge, or may be formed to reach just before the edge. The groove part 6 shown in FIG. 2(c) and FIG. 2(d) guides the contents from the drinking mouth 5 to the user's mouth, and when the user releases his mouth from the drinking mouth 5, the contents remaining in the drinking mouth 5 can be removed. The contents near the drinking port 5 are returned to the drinking port 5 . In addition, although three groove portions 6 are shown in FIGS. 2(c) and 2(d) , the number may be any number or may be omitted.

A label indicating the contents may be affixed or printed on the top cover 2, or a label showing the face of a person or animal may be affixed or printed. In this case, as long as the drinking port 5 corresponds to a human mouth or an animal's mouth, the content can be ingested with a sense of fun like kissing. Alternatively, half of the face may be printed on the tapered part 3 and the remaining part of the face may be printed on the tapered part 21 of the container 20 so that the printed image can be visually confirmed when the paper cover 1 is correctly attached. face.

FIG. 25 is a schematic view, a partial enlarged view, and an A-A cross-sectional view showing the indicator portion 40 of the paper cover 1 . In addition, in the partial enlarged view, for ease of understanding, the inner and outer sides of the peripheral wall of the paper cover 1 are shown in a state in which they are unfolded.

The indicator part 40 is a member for identifying the contents of the container 20 by printing characters, symbols, patterns, figures, etc. As described above, the paper cover 1 uses paper material, so it can be easily printed. In addition, the indicator part 40 may identify whether the contents are hot or cold by printing a background color. For example, hot drinks can be identified by setting the background color to a red-based color, and cold drinks can be identified by setting the background color to an aqua-based color. In addition, the background color can also be used to associate the content. For example, if it is black coffee, the background color can be set to a black-based color, if it is orange juice, it can be set to an orange-based color, and if it is milk, the background color can be set to a white-based color. In addition, when the background color is a black-based color, white characters, symbols, patterns, graphics, etc. may be used.

As shown in the partial enlarged view, the marking part 40 includes: an outer marking part 40a printed to correspond to the outer side of the peripheral wall of the paper lid 1; a curling marking part 40b printed to correspond to the curling part 9; and The inner indication part 40c is printed so as to correspond to the inner side of the peripheral wall of the paper cover 1. In addition, the peripheral wall is formed on the outer periphery of the top cover part 2 , extends to the curled part 9 , and is connected to the curled part 9 .

The outer indicator part 40a mainly prints a plurality of content candidates as characters on the outside of the peripheral wall of the paper cover 1 so as to enable the content side to be identified. To give an example, Mocha Coffee, black coffee, etc. In addition, when there is a limit on the number of characters due to the space of the peripheral wall of the paper lid 1, the abbreviation may be printed. If it is cappucino, CAPP or the like may be printed.

The curl indicator part 40b is indicated in association with at least one of the outer indicator part 40a and the inner indicator part 40c. For example, the side that provides the contents confirms the contents of the container 20 from a plurality of content candidates, and deforms the curl indicator portion 40b associated with the outer indicator portion 40a of the contents of the container 20, thereby allowing others ( For example, the user or a store employee other than himself) identifies the contents. The curled portion 9 is easily deformed by pressing or bending with a finger, so that others can recognize the contents without using a writing instrument or the like.

Therefore, the curl indicator part 40b is preferably a straight line, a curve, or the like. For example, the curl indicator part 40b is made into a plurality of curves, and the shape of the curves is deformed by being pressed from above, so that the shape of the curves is different from the curves that are not pressed. Therefore, other people can recognize the contents through the deformation of the curled portion 9 and the deformation of the printing. In addition, if the curl indicator part 40b is set as characters, the curl part 9 is deformed into a flat shape by pressing from above. Therefore, the printed characters will look large, and the size of the characters that are not pressed can be adjusted accordingly. to identify. In addition, the deformation of the curled portion 9 is not limited to pressing from above, and the curled portion 9 may be bent inward or outward. In this case, it is sufficient to provide notches in advance on the curled portion 22 or the peripheral wall of the paper cover 1 .

In addition, deformation may be performed such as by drilling a hole in the curled portion 9 or the peripheral wall using a drilling tool or the like. Furthermore, when the rule is determined that the curled portion 9 is deformed to identify the contents, printing of the curled indicator portion 40b may be omitted.

In this way, by physically deforming the curled portion 9, the contents can be identified.

The inner indication part 40c mainly prints a plurality of content candidates as characters on the inside of the peripheral wall of the paper cover 1 so that the user can recognize the contents. Therefore, it is preferable that the inner indicator part 40c and the curl indicator part 40b are provided together with the position where a user can visually confirm from the drinking spout 5. Specifically, it is better In order to set the drinking spout 5 on the lower side, an inner indicator portion 40c is provided on the upper right (first quadrant) or upper left (second quadrant) of the paper cap 1 .

In addition, although it is preferable that the outer indicator part 40a, the curl indicator part 40b, and the inner indicator part 40c are provided in association with each other, the outer indicator part 40a only needs to allow the side that provides the content to recognize the content, so it can be independent of the inner indicator. The portion 40c can be provided at any position outside the peripheral wall of the paper cover 1 . In addition, from the viewpoint of ease of printing, printing of the marking portion 40 including the curl marking portion 40b is preferably performed before the curling portion 9 is formed.

In addition, the label part 40 may be formed by a label instead of printing. Moreover, a mark may be provided on the top cover part 2 in association with the mark of the outer mark part 40a or the inner mark part 40c. In this case, a mark may be drawn on the top cover 2 with a writing instrument.

In the case of physically deforming part of the peripheral wall of the curled portion 9 and the paper lid 1 , notches may be provided in the curled portion 9 or the peripheral wall of the paper lid 1 as described above. FIG. 26 is a development view of the paper cover 1 with the top cover 2 removed, and shows an example in which the notch portion 41 is formed around the indicator portion 40 . As shown in FIG. 26 , the paper cover 1 with the top cover 2 removed has a fan shape, and the curled portion 9 is formed by joining the left and right ends and curling the curled portion forming area 9 a at the upper end. Then, it is joined to the top cover part 2 of another member to form the paper cover 1 . In addition, the joint portion between the left and right ends becomes a seam, and the contents from the container 20 easily leak from the seam. In addition, measures to prevent leakage from this joint will be described in detail later.

Since the tip of the curled portion forming area 9a is rolled into the curled portion 9, even if printing is performed for the curled indicating portion 40b, it cannot be visually confirmed. Therefore, the top end of the curl forming area 9a does not need to be printed for the curl indicating portion 40b. In addition, the curl forming area 9a requires rigidity in order to form curls, which does not correspond to forming the cutout portion 41 in the curl forming area 9a before forming the curling portion 9. Therefore, it is preferable that the notch portion 41 is provided outside both ends of the indicator portion 40, avoiding the curl portion forming area 9a. side. After the curled portion 9 is formed, a notch may be provided in the curled portion 9 so that the area including the indicator portion 40 can be bent inward or outward.

In addition, from the viewpoint of ease of manufacturing, it is preferable to form the notch portion 41 after printing the marking portion 40, but it is not limited to this. Furthermore, the notch part 41 may be formed after the curl part 9 is formed. In addition, the notch portion 41 may be formed in a half-cut shape, may be formed discontinuously, or may be provided only on one side of the indicator portion 40 .

When the indicator part 40 is bent inward, the printing of the outer indicator part 40a can be visually confirmed. When the indicator part 40 is bent inward, the printing of the inner indicator part 40c can be visually confirmed. In this way, when bending and confirming the marking of the marking portion 40, there is no need to reverse the printing of the outer marking portion 40a and the inner marking portion 40c as shown in the partially enlarged view of FIG. 25, and they may print in the same direction.

Thereby, by bending the indicator part 40 corresponding to the contents of the container 20, the user can visually confirm the contents of the container 20.

Moreover, it is preferable that the notch part 41 is formed so that it may not reach the top cover part 2. This is to prevent the contents from the container 20 from leaking from the cutout portion 41 . In addition, instead of bending the notched portion 41, the curled portion 9 formed with the notched portion 41 can be deformed by pressing, and the contents can be visually confirmed in association with the indication of the indicating portion 40. Furthermore, as described above, the curled portion 9 is deformed into a flat shape by being pressed from above, so the visual confirmation of characters, marks, graphics, etc. printed on the curled indication portion 40b is improved.

To give an example of the size of the drinking port 5 from the viewpoint of drinking convenience, the width W1 is 10 mm to 25 mm, preferably 15 mm to 22 mm, and the length L1 is 10 mm to 25 mm, preferably 14 mm to 21 mm. In addition, it is difficult to drink when the drinking port 5 is located at the outer peripheral end (peripheral wall portion) of the top cover 5, so the length L2 from the outer peripheral end (peripheral wall portion) to the drinking port 5 is 1 mm to 15 mm, preferably 4 mm to 12 mm. When the content of the container 20 is a hot beverage, if the length L2 is set to 4 mm or more, the temperature of the content will decrease while passing through the top cover 2 . Therefore, if the photograph is taken through the outer peripheral end (peripheral wall portion) Removing the contents can reduce the worry of burns. In addition, as will be described later using FIG. 22 , after the height H2 of the peripheral wall is set, the temperature of the contents can be lowered while the contents are passing through the peripheral wall.

When considering the convenience of drinking and reducing the worry of burns, the ratio of the length L1 of the drinking port 5 to the length L2 from the drinking port 5 is 1.1 to 10, preferably 1.1 to 5.3. In addition, the shape of the drinking spout 5 is not limited to the shape shown in the figure, and any shape may be used. Moreover, the connection part 5a or the groove part 6 shown in FIG. 2 may be provided in the drinking spout 5.

FIG. 3 is a reference diagram showing a plastic cap. Currently, the plastic lid used is a lid that is fitted into the outside of the container, and has a fitting part below the drinking spout 5 , so there is a lower groove part 50 . When the contents are ingested, the contents may overflow from the drinking mouth 5 to the lower groove 50 , resulting in poor usability. In particular, elderly people can easily overflow the contents into the lower groove portion 50 .

On the other hand, in this embodiment, since the above-mentioned groove portion 6 is present, the usability of the paper cover 1 is improved.

Returning to FIG. 2 , when the paper lid 1 is placed on the container 20 , the air hole 7 is used to prevent the container 20 and the paper lid 1 from being tightly fitted to cause liquid leakage. In this embodiment, the air hole portion 7 is provided to overlap the groove portion 6 . Thereby, the contents accumulated in the recessed portion of the top cover 2 can also be returned from the air hole portion 7 into the container 20 . In addition, the air hole portion 7 may be provided so as to avoid the groove portion 6 . The air hole portion 7 is not limited to preventing liquid leakage, but also serves as an escape portion for air in the container when the container is pressed, and has a function of preventing the lid 1 fitted to the container from being detached from the container.

One end of the sealing portion 8 is a sealing portion 8a that blocks the drinking spout 5, and the other end 8b has a function described later and forms a releasable seal.

The other end 8b can be used as a pinch portion when peeling off the sealing portion 8. Instead, the grip seal portion 8a When the sealing part 8 is peeled off, the other end 8b may remain connected to the top cover part 2 . As shown in FIG. 2( b ), the paper cap 1 and the container 20 are joined by the sealing part 8 by applying the adhesive surface of the grasped sealing part 8 a to the tapered part 21 or the curled part 22 of the container 20 . , therefore, the paper lid 1 can be prevented from falling into the container 20 or being separated from the container 20 , and the usability of the paper lid 1 can be improved.

Alternatively, a part of the upper side of the curled portion 22 of the container 20 may be flattened to form a flat portion, and the flat portion may be joined to the bottom surface of the tapered portion 3 or the bottom surface of the bottom lid portion 4 . As a joining method in this case, ultrasonic sealing, heat sealing, adhesion, etc. can be used.

In addition, when the other end 8b is grasped and used, the adhesive does not need to be applied to the other end 8b. On the other hand, when the adhesive surface of the sealing part 8a is bonded to the tapered part 21 or the curled part 22 of the container 20, the other end 8b may be adhered stronger than the sealing part 8a. In any case, the adhesive force of the sealing portion 8a and the adhesive force of the other end 8b are different.

The container 20 is a paper container having an opening on the upper side, and has a tapered portion 21 , a curled portion 22 , and a bottom 23 . In this embodiment, the taper shapes of the tapered portion 21 of the container 20 and the tapered portion 3 of the paper lid 1 are opposite, so when the paper lid 1 is pressed into the container 20, the paper lid 1 and the container 20 The sealing performance is improved, and even when the container 20 is knocked over, the worry of the contents of the container 20 overflowing can be reduced. In addition, various printing can be performed on the paper cover 1 . Details will be described in the third embodiment described below. Marks (lines, marks, notes) for pressing the paper lid 1 into the container 20 can be printed on the tapered portion 21 (side surface). In addition, if the recessed portion of the top cover 2 is printed, the user can easily visually confirm it, and the product description or precautions can also be explained through printing. In addition, you can provide a mark (line, mark, note) for pressing the paper lid 1 on the container 20 side, and print "Press the paper lid 1 to Notes on the markings on the side of the container 20 or until the markings are no longer visible. Furthermore, by combining the mark and note of the paper lid 1 with the mark and note of the container 20, a new mark or a new note can be formed. In addition, the paper lid 1 of the present invention is not limited to use in paper containers. When used, it can be used as a lid for various containers such as plastic containers and foam plastic containers.

(Second embodiment)

Hereinafter, the second embodiment will be described using FIG. 4 . Fig. 4 is a cross-sectional view of the paper lid 1 and the container 20 according to the second embodiment. Fig. 4(a) is a cross-sectional view showing a state in which the paper lid 1 is removed from the container 20. Fig. 4(b) is a diagram showing the paper lid 1 and the container 20. A cross-sectional view of the state in which the lid 1 is fitted to the container 20 .

In this embodiment, the paper cover 1 is also provided with the curling portion 9 . The curled portion 9 may be integrally provided with the paper cover 1 , or a separate curled portion 9 may be joined to the paper cover 1 .

In this embodiment, the curled portion 9 and the curled portion 22 have different sizes. When the curled portion 9 is made larger, the stability of the paper lid 1 and the container 20 when the curled portion 9 and the curled portion 22 are fitted can be improved. airtightness. In this case, even if the container 20 is knocked over, the fear of the contents of the container 20 overflowing can be reduced.

Alternatively, a part of the lower end of the curled part 9 may be flattened to form a flat part, and a part of the upper end of the curled part 22 may be flattened to form a flat part, and the flat parts may be joined together to form a hinge part. In this case, the size of the curled portion 9 may be smaller than the size of the curled portion 22 .

(Third embodiment)

Hereinafter, the third embodiment will be described using FIG. 5 . Fig. 5 is a schematic view of the paper lid 1 with the bracket 30 according to the third embodiment. Fig. 5(a) is a diagram showing the state before attachment. Fig. 5(b) and Fig. 5(c) are diagrams showing the attachment. Picture of the final state.

The holder 30 is made of paper material and is a tapered annular member having the same tapered shape as the tapered portion 21 of the container 20 . In addition, a part of the tapered annular member of the stent 30 may be cut off.

In addition, in order to prevent the container 20 from accidentally falling, the surface of the holder 30 may be provided with unevenness by stamping or embossing, or may be coated with an anti-slip agent.

The hinge 31 is a connecting member that connects the bracket 30 and the paper cover 1 . The hinge 31 is made of paper material, with one end connected to the tapered shape of the bracket 30 and the other end connected to the paper cover 1 . In this case, it is desirable to join the other end of the hinge 31 to the recessed portion of the top cover 2 . In addition, the hinge 31 can be bent into several stages in a Z-shape to maintain elasticity. In addition, the hinge 31 may be formed of wire or cloth.

In addition, a mark 10 serving as a mark for pressing the paper cover 1 into the container 20 is printed on the side surface of the paper cover 1 .

In addition, various joining methods such as ultrasonic joining, heat sealing, and adhesion can be applied to the hinge 31 .

The container 20 has various sizes (S size, M size, L size, etc.), and the diameter of the curled portion 22 and the diameter of the tapered portion 21 differ depending on the size. Therefore, in this embodiment, the size of the paper cover 1 is made equal to the size of the bracket 30 . For example, if the size of the paper lid 1 is L size, the bracket 30 also adopts the L size.

Thereby, the position of the bracket 30 is fixed on the container 20, so the user will not feel any discomfort.

FIG. 5( b ) is an example in which the bracket 30 is located at the center of the container 20 in the height direction. Furthermore, an example is shown in which the hinge 31 is not in contact with the paper lid 1 and the container 20 except for its both ends.

FIG. 5( c ) is an example in which the bracket 30 is located at the upper portion of the container 20 in the height direction. Furthermore, an example is shown in which the hinge 31 is attached so as to be in contact with the paper cover 1 and the bracket 30 . In this case, as long as the hinge 31 is in contact with the side surface and the recessed portion of the top cover 2, the top cover 2 can be pressed against the container 20 by the hinge 31, thus preventing the paper cover 1 from falling onto the container 20. , or separated from the container 20, and the convenience of use of the paper cover 1 can be improved. In this case, it is desirable to join the paper lid 1 and the container 20 via the sealing portion 8 .

In addition, in FIG. 5( b ), the hinge 31 may be in contact with the paper lid 1 and the container 20 .

In addition, in this embodiment, the tapered part 3 of the paper cap 1 may adopt the same taper shape (forward taper shape) as the tapered part 21 of the container 20.

(Fourth Embodiment)

Hereinafter, the fourth embodiment will be described using FIG. 6 . Fig. 6 is a schematic view of the paper cover 1 with the bracket 30 according to the fourth embodiment. Fig. 6(a) is a diagram showing the state before attachment. Fig. 6(b) and Fig. 6(c) are diagrams showing the attachment. Picture of the final state.

In this embodiment, the holder 30 is a tapered annular member having a tapered shape opposite to the tapered portion 21 of the container 20 . In addition, a part of the tapered annular member of the stent 30 may be cut off.

In this embodiment, the tapered portion 3 of the paper lid 1 may have the same tapered shape (forward tapered shape) as the tapered portion 21 of the container 20 .

In the third and fourth embodiments, the paper cover 1 and the holder are integrated via the hinge 31 . Therefore, even if the contents of the container 20 are very hot, the container 20 will not become too hot to hold. , and the contents of container 20 will not cool.

FIG. 7 is a modification of the paper lid 1 with a bracket 30 according to the third and fourth embodiments, and shows an example in which the paper lid 1 is provided with a handle and a bracket. As shown in FIG. 7 , the handle is provided by extending the bracket 30 laterally and providing an opening 32 in the extended portion. In this way, the container 20 can be easily carried by integrally forming the lid, the holder, and the handle.

The paper caps 1 of the first embodiment and the second embodiment can be stored or transported in a stacked manner, so the logistics cost can be reduced.

In the paper caps 1 with the holder 30 of the third embodiment and the fourth embodiment, the paper caps 1 with the holder 30 can be stored or transported in an overlapping manner, so the logistics cost can be reduced.

Furthermore, in the cap shown in the reference drawing of FIG. 3 , when the cap is removed from the container and the drinking spout 5 side is placed on a table or the like, the drinking spout 5 is in contact with the table, which is unhygienic. On the contrary, when the drinking spout 5 is placed on the table in reverse, the contents of the container adhere to the bottom side of the lid, so the contents adhere to the table, creating a need to clean the table.

In contrast, in the paper cover 1 with the holder 30 of the third and fourth embodiments, the paper cover 1 is held by the holder 30 even when the paper cover 1 is removed. Therefore, the drinking spout 5 does not come into contact with the table, and the contents attached to the bottom cover 4 do not fall to the table due to the tapered portion 3, thereby improving the usability of the paper lid 1.

(fifth embodiment)

In the above-mentioned embodiment, the example of fitting the tapered portion 3 into the inside of the container 20 and fitting the paper lid 1 into the inside of the container 20 has been explained. Hereinafter, the example of fitting the paper lid 1 into the container 20 will be continued. The example of the outside is explained.

FIG. 8 is a schematic view of the paper cover 1 according to the fifth embodiment. FIGS. 8(a) to 8(e) show five examples and will be described in order. In addition, in order to simplify the drawing, illustration of the drinking port 5 and the like is omitted.

The paper cover 1 of FIG. 8( a ) is provided with a second tapered portion 11 for fitting into the outer side of the curled portion 22 . In addition, since the paper lid 1 is fitted to the outside of the container 20, its size is larger than when it is fitted to the outside of the container 20. As shown in FIG. 8(a) , the cost of the paper cover 1 can be reduced by fitting the curled portion 22 with the second tapered portion 11 . This kind of paper lid 1 is suitable as a lid for the cold container 20 .

In addition, in FIG. 8 , the size of the paper cover 1 is exaggeratedly shown, and the size thereof is not limited to the size shown in the figure.

The paper cover 1 of FIG. 8( b ) is provided with an engaging portion 12 capable of engaging with the inside of the curled portion 22 in addition to the second tapered portion 11 . The engaging part 12 is made of paper material, and its shape may be circular, oval, rectangular, etc., but in this embodiment, a circular shape is used. In this embodiment, the engaging portion 12 is formed separately from the paper lid 1 and is bonded using various bonding methods such as adhesion or ultrasonic bonding. If the joint portions of the paper lid 1 and the engaging portion 12 are respectively coated with films, the paper lid 1 and the engaging portion 12 can be bonded by heat sealing.

By positioning the curled portion 22 between the second tapered portion 11 and the engaging portion 12 , the fear of the paper lid 1 being detached from the container 20 can be reduced. Therefore, the engaging portion 12 does not need to always be in contact with the curled portion 22. For example, if the paper cover 1 is embedded in the container 20 and the second tapered portion 11 is fitted with the curled portion 22, then when the engaging portion 12 and the curled portion There can be a gap of about 0.1mm to 1.5mm between 22. In addition, the engaging portion 12 may have a shape capable of engaging with the entire circumference of the curled portion 22 , or may have a shape capable of engaging with the curled portion 22 at several locations.

In the paper cover 1 of FIG. 8(c) , the engaging portion 12 is formed of a base portion 12a and an engaging portion 12b. The base portion 12a and the engaging portion 12b may be formed integrally, or may be formed separately and then joined together. As shown in FIG. 8( c ), the engaging portion 12 b may engage with the curled portion 22 at two places. Alternatively, the engaging portion 12 b may have a shape capable of engaging with the entire circumference of the curled portion 22 .

In this way, by forming the engaging portion 12 from the base portion 12a and the engaging portion 12b, the amount of paper material used in the engaging portion 12 can be reduced.

In FIGS. 8(a) to 8(c) , the second tapered portion 11 is illustrated as having a forward taper shape, but it may also be in an inverted taper shape, or may be linear instead of a tapered shape. . Furthermore, when the paper lid 1 is fitted to the outside of the container 20, the tapered portion 3 may be formed into a linear shape.

In addition, when the curled portion 9 is flattened in the height direction (Z direction), the height of the curled portion 9 becomes higher and the distance from the drinking port 5 formed in the recessed portion is further, making it possible to realize a paper lid that is easier to drink. 1. volume The curved portion 9 is preferably about 0.5 mm to 1 mm in the width direction. Furthermore, when the curled portion 9 is flattened by press processing, the curled portion 9 can be increased by heating a part of the press processing machine (for example, the lower mold holding the paper cover 1) to 50°C to 90°C. stamping processability. In addition, when the curled portion 9 is flattened, the outer shape of the paper lid 1 can be reduced, so the number of paper lids 1 to be transported can be increased, and the transportation cost per unit of the paper lid 1 can be reduced.

In addition, in FIG. 8( b ), the engaging part 12 and the curled part 22 are engaged from the inside of the curled part 22 . However, as shown in FIG. 8( d ), they may also be engaged from the upper side of the curled part 22 . The part 12 is engaged with the curling part 22. In this case, it is desirable to engage the engaging portion 12 with the curled portion 22 inside the curled center of the curled portion 22 .

Similarly, in Fig. 8(c), the engaging portion 12b is engaged with the curled portion 22 from the inside of the curled portion 22. However, as shown in Fig. 8(e), the engaging portion 12b may be engaged from the upper side of the curled portion 22. The engaging portion 12b is engaged with the curling portion 22. In this case, it is desirable to engage the engaging portion 12 with the curled portion 22 inside the curled center of the curled portion 22 .

As shown in FIGS. 8(a) to 8(e) , when the curled portion 9 is formed on the upper side of the paper cover 1 , that is, when the second tapered portion 11 and the tapered portion 21 are forward tapered. It is preferable that the inner diameter of the top end of the second tapered portion 11 (the bottom cover portion 4 side) is the same as or slightly smaller than the outer diameter of the curled portion 22 . Thereby, when the paper lid is inserted into the container 20, the curled portion 22 is flattened (deformed), and the paper lid 1 and the container 20 are fitted, thereby improving the sealing properties of the paper lid 1 and the container 20.

In the reference example shown in FIG. 3 , there is a fitting part with the container 20 at the same position as the lower groove part 50 or below, and the plastic cover is removed from the vicinity of the fitting part, so the contents come into contact with the user. There is a worry of burns on the hands.

On the other hand, as described above, in the present embodiment, the curled portion 9 is located above the position where the paper lid 1 and the container 20 are fitted. Therefore, it is easy to hold the curled portion 9 or its peripheral wall by hand. When the paper cover 1 is removed from the container 20, there is no concern that the contents will touch the user's hands.

Furthermore, in the reference example shown in FIG. 3 , since the plastic cap is removed from below the drinking spout 5 , there is a concern that the contents may come into contact with the user's hand from the drinking spout 5 .

On the other hand, in this embodiment, the paper lid 1 is removed by holding the curled portion 9 formed on the upper side of the paper lid 1 above the drinking spout 5 or the surrounding wall thereof. There is a concern that the contents from the drinking port 5 may touch the user's hands. In addition, if the paper lid 1 is of a type in which the paper lid 1 is removed and the contents of the container 20 are drunk, the drinking port 5 may be omitted.

As shown in FIGS. 8(a) to 8(e) , when the curled portion 9 is formed on the upper side of the paper lid 1 , the user can drink the contents from the drinking port 5 formed in the top cover 2 by placing the mouth on the curled portion 9 . things. This is the same mouthfeel as when drinking the contents from the paper container 20 by placing the mouth on the curled portion 22 . Therefore, the user will not feel the strange feeling when drinking the contents from the drinking mouth of the plastic cover. In addition, since the tapered portion 3 and the tapered portion 21 are forwardly tapered, the contents can be drank from the drinking port 5 by placing the mouth on the curled portion 9 at the same angle as when drinking the contents from the paper container 20 . Thereby, the contents can be drunk from the paper lid 1 with the same taste as when the contents are drunk from the paper container 20 .

(Sixth Embodiment)

FIG. 9 is a schematic view of the paper lid 1 of the sixth embodiment, showing an example in which the paper lid 1 is fitted to the outside of the container 20 like the fifth embodiment. In addition, four examples are revealed in Figure 9(a) to Figure 9(d) and will be explained in order. In addition, in order to simplify the drawing, illustration of the drinking port 5 and the like is omitted.

In this embodiment, the engaging part 12 is tapered, and a tapered part 12c is formed. The tapered portion 12c adopts the same taper shape (forward taper shape) as that of the second tapered portion 11, but it may also adopt a different taper shape. Inverted taper can also make the angle of the taper different.

In the paper cover 1 of FIG. 9(a) , after the second tapered portion 11 starts to engage with the curled portion 22, the tapered portion 12c engages with the curled portion 22. The top end of the second tapered portion 11 is It protrudes toward the container 20 from the top end of the tapered portion 12c. In other words, the engaging portion 12 is located in the space formed inside the second tapered portion 11 . Therefore, the second tapered portion 11 is engaged with the curled portion 22 , whereby the curled portion 22 and the upper portion of the tapered portion 21 receive an inward force. In this state, the tapered portion 12 c is engaged with the curled portion 22 , thereby receiving an outward force on the curled portion 22 and the upper portion of the tapered portion 21 , so that the paper lid 1 can be tightly fitted into the container 20 . In this way, by making the tapered length of the tapered portion 12c shorter than the tapered length of the second tapered portion 11, the paper lid 1 can be easily removed from the container 20. Even in this case, by making the tapered length of the tapered portion 12c longer than the diameter of the curled portion 22, the paper lid 1 can be reliably inserted into the container 20 even when the temperature of the contents of the container 20 is high. In this case, it can also reduce accidents caused by burns.

In addition, a curled portion may be formed on the upper surface of the engaging portion 12 , and the engaging portion 12 and the bottom cover 4 may be joined by the curled portion.

In the paper cover 1 of FIG. 9(b) , the top end of the second tapered portion 11 is aligned with the top end of the tapered portion 12c so that the second tapered portion 11 and the tapered portion 12c are jammed with the curled portion 22 at almost the same time. combine. In this embodiment, the top end of the second tapered portion 11 and the top end of the tapered portion 12c are aligned with each other through the base portion 12a. However, the size of at least one of the second tapered portion 11 and the tapered portion 12c can also be adjusted. The top end of the second tapered portion 11 is aligned with the top end of the tapered portion 12c. In this way, by making the top end of the second tapered portion 11 coincide with the top end of the tapered portion 12c, the paper lid 1 can be inserted into the container 20 with good balance.

In the paper lid 1 of FIG. 9(c) , after the tapered part 12c starts to engage with the curled part 22, the second tapered part 11 engages with the curled part 22. The tip of the tapered part 12c is smaller than The top end of the second tapered portion 11 further protrudes toward the container 20 . In this embodiment, although the top end of the tapered portion 12c is made smaller than the second tapered portion by the base portion 12a The top end of the portion 11 protrudes toward the container 20, but the size of at least one of the second tapered portion 11 and the tapered portion 12c can also be adjusted to make the top end of the tapered portion 12c protrude further toward the container than the top end of the second tapered portion 11. 20 stands out. In this way, by making the top end of the tapered portion 12c protrude toward the container 20 more than the top end of the second tapered portion 11, the engagement between the tapered portion 12c and the curled portion 22 can be used as a guide to make the second tapered portion 11 Fitted into the curled portion 22. Thereby, the paper lid 1 can be easily inserted into the container 20 .

FIG. 9( d ) is an example in which the opening 33 is provided on the upper surface of the engaging part 12 . Through the opening 33 , the joint between the top cover 2 and the engaging part 12 is only the outer periphery of the engaging part 12 , thereby reducing the weight of the engaging part 12 . In addition, an opening may be formed in the top cover 2 to reduce the weight of the top cover 2 .

10 and 11 are diagrams showing a method of manufacturing the paper lid 1 of the sixth embodiment. Hereinafter, the method of manufacturing the paper lid 1 of the sixth embodiment will be described using FIGS. 10 and 11 . In addition, the paper lid 1 of the sixth embodiment is manufactured by using the bottoms 23 of containers 20 of different sizes. However, the paper lid 1 is not limited to this. It can also be manufactured by stamping or paper-making the paper material. Paper cover 1. In this case, by heating at least part of the press machine (for example, the lower mold holding the paper cover 1 ) to 50°C to 90°C, the press workability of the paper cover 1 can be improved. In addition, the explanation will continue taking the paper cover 1 shown in FIG. 9(a) as an example.

Figure 10(a) shows the bottoms 23a, 23b of two containers 20 of different sizes. The bottom part 23a is formed according to the size of the outer side (outer diameter) of the curled part 22. The bottom part 23b is formed according to the size of the inside (inner diameter) of the curled part 22. As can be seen from FIG. 10(a) , a part of the bottom part 23a (the top cover part 2 and the bottom cover part 4) has a shape similar to the bottom part 23b. Therefore, when the tapered portion 3 is used as the first engaging portion, the tapered portion 12c is used as the second tapered portion, and the paper lid 1 is inserted into the container, even if the container 20 is knocked over, It can also reduce the worry of the contents of the container 20 overflowing. Moreover, the basis weight of the bottom 23a and the bottom 23b may be the same, but the bottom 23a fitted to the outside of the container 20 requires strength. Therefore, it is desirable to make the basis weight of the bottom 23a larger than that of the bottom 23b. To give an example, the weight per unit area of the bottom 23a is 200g/ ^m2 to 360g/ ^m2 , and the weight per unit area of the bottom ^23b is 150g/m2-199g/ ^m2 . In this case, if the weight per unit area of the second tapered portion 11 is set to 200g/m2 to 360g/m2, and the weight per unit area of the tapered portion 12c is set to 150g/m2 to 199g/m2, then the tapered portion The resistance (rigidity) of 12c becomes small, so it is easy to remove the paper cover 1.

In addition, the same paper material may be used for the bottom 23a and the bottom 23b, or different paper materials may be used.

In Fig. 10(b), a curled portion 9 is formed above the bottom portion 23a. FIG. 11 is a partial enlarged view of the crimping mold 70. The curling mold 70 has an upper mold 71 , an upper mold groove 72 , a lower mold 73 , and a lower mold groove 74 . The upper mold 71 has a top end portion accessible from above the bottom 23a. Moreover, the upper mold 71 is provided with the upper mold groove part 72 which has a curved surface shape. The lower mold 73 has a holding portion that holds the bottom portion 23 a and a lower mold groove portion 74 that faces the upper mold groove portion 72 .

When the lower mold 73 holding the bottom 23a moves to the upper mold 71, the top end of the bottom 23a comes into contact with the upper mold groove 72 and slides on the surface of the upper mold groove 72 along the curved surface of the upper mold groove 72 to open outward. The mold is extruded and expanded to gradually become round and abut against the lower die groove portion 74 . Thereby, the upper part of the bottom part 23a is curled.

FIG. 10(c) shows a state in which the top cover portion 2a of the bottom portion 23b is joined to the lower side of the top cover portion 2 of the bottom portion 23a. The top cover 2 and the top cover 2a can be joined by various joining methods such as adhesion and ultrasonic joining. For example, if the joint portions of the top cover 2 and the top cover 2a are respectively coated with thin films, the recessed portions of the top cover 2 and the recessed portions of the top cover 2a are both formed into flat surfaces. Therefore, they can be sealed by heat sealing. To join the top cover part 2 and the top cover part 2a. In addition, the joining of the top cover part 2 and the top cover part 2a is ideally made to make the center of the top cover part 2 and the top cover part 2a coincide, but it is not limited to this. For example, the second conical shape can also be used at and near the drinking port 5 The center of the top cover portion 2 and the top cover portion 2a is eccentric in such a manner that the fitting of the curled portion 22 between the portion 11 and the tapered portion 12c becomes tight.

After joining the top cover part 2 and the top cover part 2a, the paper lid 1 can be manufactured by processing the drinking spout 5, the air hole part 7, etc.

FIG. 12 is a diagram showing another method of manufacturing the paper cover 1 . In this embodiment, the bottom 23 of the container 20 is also used to manufacture the paper lid 1. However, the invention is not limited to this, and the paper lid 1 can also be manufactured by stamping a paper material.

FIG. 12(a) is a diagram in which the bottom 23 of the container 20 is cut out to a predetermined size, and the lower end is bent inward as shown by the arrow.

Figure 12(b) is a view after the lower end is bent inward. By bending the lower end portion inward, as shown in FIG. 12(b) , there are two-layered portions and one-layered portion of the paper material (the portion indicated by the arrow). When the paper lid 1 is inserted into the container 20, the curled portion 22 of the container 20 is hung on the first-layer portion and held. Furthermore, since the tapered portion 3 of the paper lid 1 is fitted into the tapered portion 21 of the container 20, the paper lid 1 can be tightly fitted into the container 20.

In this embodiment, the tapered portion 3 of the paper lid 1 and the tapered portion 21 of the container 20 are inverted tapers. However, the tapered portion 3 of the paper lid 1 and the tapered portion 21 of the container 20 may also be inverted taper shapes. The portion 21 may be formed into a forward tapered shape, or the tapered portion 3 may be formed into a linear shape. In addition, if the lower end is bent inward and a convex portion is provided on the inner surface, or the inner surface is made corrugated, the paper lid 1 can be more tightly fitted into the container 20 .

In addition, the applicant of this application filed a provisional application in the United States on July 12, 2018, such as fitting the curled portions with each other as shown in Figure 4, fitting the curled portion with the tapered portion as shown in Figures 9 and 10, etc. The application No. 62/696895 is based on the Japanese Special Application No. 2018-138005 filed on July 23, 2018. The disclosure is disclosed in the application, the disclosure content is cited in this application, and the content will be described below. In addition, only the parts where the symbols are repeated are changed.

Fig. 13 (Fig. 38 of Japanese Patent Application No. 2018-138005) is a diagram showing another example of the fitting member using the curling member 52 (56). FIG. 13( a ) is a diagram showing an example in which the tapered annular groove portion 55 is provided in the mounting portion 104 . The tapered shape of the tapered annular groove portion 55 becomes narrower from the upper surface of the mounting portion 104 to the lower surface. Therefore, the fitting width W5 of the upper surface of the mounting portion 104 is larger (wider) than the fitting width W3 of the curling member 52 .

FIG. 13( b ) is a diagram showing an example in which the curling member 56 is provided in the mounting part 104 and the tapered annular groove part 57 is provided in the cover part 105 . The curling member 56 has the same configuration as the curling member 52 . The width W6 of the tapered annular groove portion 57 on the side facing the mounting portion 104 is larger (wider) than the fitting width W7 of the curling member 56 .

FIG. 13(c) shows an example in which the cover 105 is provided with a recessed portion 15 whose peripheral edge is formed in a tapered annular shape, and the curling member 52 is joined to the tapered annular recessed portion 15 . The curling member 52 is joined along the tapered surface of the recess 15, so the curling member 52 can be easily positioned. In addition, a part of the curling member 52 projects from the recessed portion 15 toward the mounting portion 104 .

13(c) shows an example in which the mounting portion 104 is provided with a recessed portion 58 having a tapered peripheral edge, and the curling member 56 is joined to the recessed portion 58 so as to accommodate the curling member 56 in the recessed portion 58. The curling member 56 is joined along the tapered surface of the recess 58, so the curling member 56 can be easily positioned.

The major diameter d5 of the curling member 52 is larger than the inner diameter d6 of the curling member 56 . When the cover 105 is closed, at least one of the curling member 52 and the curling member 56 is elastically deformed, whereby the curling member 52 is embedded in the curling member 56 .

As shown in FIG. 13(d), the mounting portion 104 is provided with a convex portion 17 having a tapered periphery. Major diameter of curled member 52 d5 is larger than the outer diameter d7 of the convex portion 17 , and the curling member 52 is elastically deformed when the cover 105 is closed, whereby the curling member 52 is externally fitted to the convex portion 17 .

In addition, in FIGS. 13(a) to 13(d) , it is preferable to set the curling members 52, 56, and the recess so that the upper surface 104a of the mounting part 104 contacts the upper surface 105a of the cover part 105 when the cover is closed. The shape and size of the groove portions 55 and 57 and the recessed portion 58. Alternatively, foamable ink or foamable hot melt adhesive containing a foaming agent may be applied and foamed on at least part of the curling members 52 and 56, the groove portions 55 and 57, and the recessed portions 15 and 58. In addition, the groove portions 55 and 57, the recessed portions 15 and 58, and the convex portion 17 can be formed by stamping.

As can be seen from the above description, fitting the curled portions to each other, fitting the curled portion to the tapered portion, and the like are disclosed in Japanese Patent Application No. 2018-138005.

The paper cover 1 of the above-mentioned sixth embodiment can also be fitted in other ways. Fig. 19 is a modified example of the paper lid of the sixth embodiment. Six examples are shown in Figs. 19(a) to 19(f) and will be described in order. Here, Figures 19(a) to 19(c) show an example in which the tapered portion 12c of the engaging portion 12 and the tapered portion 21 of the container 20 are forward tapers, and Figures 19(d) to 19((d) f) shows an example in which the tapered portion 12c of the engaging portion 12 and the tapered portion 21 of the container 20 are inversely tapered. In addition, in order to simplify the drawing, illustration of the drinking port 5 and the like is omitted.

In FIG. 19(a) , a curled portion 29 is formed on the upper surface of the engaging portion 12 , and the engaging portion 12 and the top cover 2 are engaged by the curled portion 29 . By fitting or engaging the curled portion 29 with the curled portion 22 of the container 20, fitting or engaging the second tapered portion 11 with the curled portion 22, and fitting or engaging the tapered portion 12c of the engaging portion 12 with the container 20 The inner surface of the tapered portion 21 is fitted, and even when the container 20 is tipped over or tilted excessively, the above three places are used for fitting or engagement or both. Therefore, the paper lid 1 and The airtightness of the container 20 is improved, and the worry of the contents of the container 20 overflowing can be reduced.

Fig. 19(b) shows an example in which the curled portion 29 is flattened along the Z-axis in Fig. 19(b) and extended in the X-axis direction. In this way, by making the curled portion 29 flat and transversely elongated, the joint area between the curled portion 29 and the top cover portion 2 can be increased, so that the engaging portion 12 can be reliably joined to the top cover portion 2 . In addition, the contact area between the curled portion 29 and the curled portion 22 can be increased, so the fear of the contents of the container 20 overflowing can be reduced. In addition, the curled portion 29 can be flattened along the Z-axis and extended in the X-axis direction by punching.

FIG. 19(c) shows an example in which the curled portion 29 is flattened along the X-axis in the figure and extended in the Z-axis direction. In this way, by lengthening the curled portion 29 in the longitudinal direction, a space is formed between the lower surface of the top cover 2 and the upper surface of the bottom cover 4. This space functions as a heat insulating portion, so the contents in the container 20 can be increased. The thermal insulation of the object. In addition, the contact area between the curled portion 29 and the curled portion 22 can be increased, so the fear of the contents of the container 20 overflowing can be reduced. In addition, the curled portion 29 can be flattened along the Z-axis and extended in the X-axis direction by punching. The curled portion 29 functions as a packing, thereby reducing the fear of the contents of the container 20 overflowing.

FIG. 19(d) shows an example in which the engaging part 12 illustrated in FIG. 19(a) is turned upside down and engaged with the top cover part 2. Thereby, the tapered portion 12c of the engaging portion 12 and the tapered portion 21 of the container 20 become inversely tapered.

When the tapered portion 12c and the tapered portion 21 are inverted tapers, they are in point contact (line contact) rather than surface contact during fitting. Compared with the case of surface contact, the force during fitting is concentrated on the Chimeric part. Therefore, the fitability between the tapered portion 12c and the tapered portion 21 is improved, so that the sealing property of the paper lid 1 is improved. In addition, since the tapered portion 12c and the tapered portion 21 are made of paper material, the tapered portion 12c and the tapered portion 21 are deformed by fitting to form several flat surfaces. This flat surface improves the fitability between the tapered portion 12c and the tapered portion 21. In addition, when the paper lid 1 is removed from the container 20, the tapered portion 12c and the tapered portion 21 are in point contact (line contact). Therefore, the fitting length is shorter than in the case of a forward taper, so it is possible to Simply remove the paper cover 1.

FIG. 19(e) shows an example in which the curled portion 29 is flattened along the Z-axis in FIG. 19(e) and extended in the X-axis direction. In this way, by making the curled portion 29 flat and transversely elongated, the fitting position of the tapered portion 12c and the tapered portion 21 can be made smaller compared to the example of FIG. 19(d).

FIG. 19(f) shows an example in which the curled portion 29 is flattened along the X-axis in FIG. 19(f) and extended in the Z-axis direction. In this way, by lengthening the curled portion 29 in the longitudinal direction, the fitting position of the tapered portion 12c and the tapered portion 21 can be made larger than in the example of FIG. 19(d). By forming the tapered portion 12c and the tapered portion 21 into an inverse tapered shape and appropriately setting the size of the fitting portion of the curled portion 29 and the tapered portion 21, the paper lid 1 with good usability can be realized.

In addition, the paper cover 1 of the fourth embodiment and the fifth embodiment may be used as the belt bracket 30 .

In addition, various deformations, etc. can be performed. Hereinafter, a modification of the sealing part 8 in FIG. 2 will be described using FIGS. 14 and 15 . In FIG. 14(a) , the sealing portion 8 is bent into a C shape and is joined to the recessed portion of the top cover 2 by the adhesive 13 applied to the lower surface side of the sealing portion 8 . Moreover, the adhesive 14 is applied to the upper surface side of the sealing part 8 . In addition, it is desirable to use a releasable adhesive as the adhesive 14 .

FIG. 14( b ) shows a situation in which one end of the upper surface of the sealing part 8 is pulled out and one end of the upper surface of the sealing part 8 is joined to the tapered part 21 of the container 20 through the adhesive 14 . In this way, by joining the paper lid 1 and the container 20 using the sealing part 8, it is possible to prevent the paper lid 1 from falling into the container 20. In addition, in FIG. 14 , the adhesive 14 is applied to the end of the upper surface of the sealing portion 8 . In order to prevent the adhesive 14 from getting stuck on the hands, it is ideal to apply the adhesive 14 in a staggered manner from the end of the upper surface. In this embodiment, the adhesive force of the adhesive 13 is greater than the adhesive force of the adhesive 14 . Instead or together with this, it is preferable that the amount of adhesive 13 applied is greater than the amount of adhesive 14 applied. In addition, the lower surface of the sealing part 8 and the recessed part of the top cover part 2 may be joined by heat sealing instead of the adhesive 13 .

FIG. 15 shows an example in which the adhesive 14 of the paper cover 1 of FIG. 14 is omitted. Instead of the adhesive 14, the end of the upper surface of the sealing portion 8 is engaged with the curled portion 22 to prevent the paper cover from being damaged. 1 falls off into the container 20. The end portion of the upper surface of the sealing portion 8 is formed in a V-shape so as to engage with the curled portion 22 . In order to maintain the V-shaped shape, it is preferable to join the V-shaped valley portion in advance by various joining methods such as adhesion, heat sealing, ultrasonic bonding, and high-frequency bonding.

In addition, the sealing part 8 in FIGS. 14 and 15 may be a sealing member covering the drinking spout 5 , or may be a sealing member different from the sealing member covering the drinking spout 5 . When the drinking spout 5 is covered with the sealing portion 8 , it is desirable not to provide the adhesive 13 in the portion facing the drinking spout 5 and around the portion.

(Seventh Embodiment)

Fig. 16 is a schematic view of the paper lid 1 according to the seventh embodiment. In addition, in order to simplify the drawing, illustration of the sealing portion 8 illustrated in FIG. 2 is omitted. In this embodiment, a window portion 18 for visually confirming the contents of the container 20 is provided, and the window portion 18 is provided with a notch portion 24 . In addition, the window portion 18 can be formed in a recessed portion of the top cover portion 2 or the like.

Fig. 16(a) shows a circular window portion 18, but the shape and size may be arbitrary as long as the contents of the container 20 can be visually confirmed. Moreover, as shown in FIG. 16(b) , the window portion 18 may have a shape that does not interfere with the drinking spout 5 .

In this embodiment, the window portion 18 is a transparent member, and various films such as polypropylene and polyethylene can be used. Furthermore, cellulose nanofibers may be used as the transparent member, and the paper cover 1 may be made of cellulose nanofibers.

The window portion 18 can be formed by forming an opening in a paper material and joining a film as a coating by various joining methods such as heat sealing or adhesive so as to cover the opening. In this case, the film can Instead of joining one side of the paper material (for example, the upper surface side), two film rolls may be provided and joined to both sides (the upper surface side and the lower surface side).

The air hole part 7 may be formed in a position different from the window part 18 as shown in FIG. 16(a), or may be formed in the window part 18 as shown in FIG. 16(b). In addition, if the paper lid 1 is for cold use, the air hole portion 7 can be omitted.

The slit portion 24 is a member for inserting a straw. In the present embodiment, it has a slit shown by a solid line and a half-cut formed at both ends of the slit and shown by a dotted line. However, it may be only a slit. , or it can be only half-cut. In addition, if the paper lid 1 is for thermal use, the notch portion 24 may be omitted. The width of the notch portion 24 can be approximately 0.3 mm to 1 mm. If the film in the window portion 18 is tensioned and a cutter is inserted into the film to form a cutout that can communicate with the container 20 side, when the cutter is pulled out, the width of the cutout will change due to the elasticity of the film. Narrowing, the slot width becomes narrower toward the container 20 side. Therefore, in the state before inserting the straw, even if the paper lid 1 is inserted into the container 20 and the container 20 is turned upside down, there will be almost no leakage of the contents from the cutout portion 24. Even if the container 20 is inadvertently knocked over, The contents will not leak from the paper cover 1 either. In addition, the notch portion 24 may be a cross line, a radial line, a curve (eg, S-shaped), or the like.

The notch portion 24 is formed with the notch as described above, so the straw can be easily inserted. Furthermore, in this embodiment, half-cut parts are formed at both ends of the slit. Therefore, when a straw with a large diameter is inserted, the half-cut parts are destroyed. Therefore, the notch portion 24 of this embodiment can easily insert a straw with a smaller diameter or even a straw with a larger diameter.

FIG. 16(c) shows an example in which the window portion 18 is provided at two locations (plural number), and the groove portion 24 is also provided at two locations (plural number). However, the number of notches 24 may be one. By aligning the two window portions 18 left and right By placing the two window portions 18 at offset positions from the center of the top cover 2, the visual visibility can be improved.

In the examples of FIGS. 16(a) to 16(c) , the window portion 18 is ideally set to approximately 5% to 50% of the area of the top cover 2 . When the size of the window portion 18 is less than 5% of the area of the top cover portion 2, its visual visibility deteriorates. When the size of the window portion 18 exceeds 50% of the area of the top cover portion 2 , the amount of film used increases, which is environmentally unfavorable.

Alternatively, the strength of the window portion 18 can be increased by punching the periphery of the window portion 18 where the notch portion 24 is not formed.

In addition, by providing the above-mentioned indicator portion 40 and the notch portion 41 together with the formation of the window portion 18, it is easier to visually confirm the contents of the container 20.

Fig. 17 is a cross-sectional view of the paper lid 1 of the seventh embodiment. Fig. 17(a) shows a case where the window portion 18 is provided in the paper lid 1 of the fifth embodiment (Fig. 8(a)). Fig. 17( b) is a case where the window portion 18 is provided in the paper lid 1 (Fig. 9(a)) of the sixth embodiment. In addition, in order to simplify the drawing, illustration of the drinking spout 5, the notch portion 24, etc. is omitted. As shown in FIG. 17(a) , a window portion 18 is formed in the top cover portion 2 . In addition, a film may be stretched and provided as the window part 18 in the part marked with the symbol 4 (the lower part of the bottom cover part 4). In this way, by having two window portions 18, the space formed by the two films functions as a heat insulating portion, so the heat retention of the contents in the container 20 can be improved.

FIG. 17( b ) shows an example in which the window portion 18 is provided in the engaging portion 12 instead of the top cover portion 2 . In FIG. 17( b ), by providing the opening 19 in the top cover 2 , the window 18 is provided in the engaging part 12 . In addition, the window part 18 may be provided in the top cover part 2 instead of the opening part 19.

In addition, a film may be stretched as the window portion 18 in the portion marked with reference numeral 12 (the lower part of the engaging portion 12), or in the portion marked with reference numeral 4 (the lower portion of the bottom cover 4). Tight setting thin film as the window portion 18. In this way, by providing two or more window portions 18, the space formed by the two films functions as a heat insulating portion, so the heat retention of the contents in the container 20 can be improved.

In addition, a curled portion may be formed on the upper surface of the engaging portion 12 , and the engaging portion 12 and the bottom cover 4 may be joined by the curled portion.

FIG. 20 is an enlarged cross-sectional view of the window portion 18 of the seventh embodiment, and the notch portion 24 is omitted in order to simplify the drawing. When the notch portion 24 is formed in the window portion 18, the vicinity of the notch portion 24 becomes weaker than other portions. Therefore, in FIG. 20(a) , a reinforcing part 27 is formed as reinforcement near the notch part 24. An adhesive (for example, hot melt glue) is applied as the reinforcing portion 27 . The adhesive hardens due to drying, thereby strengthening the vicinity of the notched portion 24 .

In FIG. 20(b) , as the reinforcing part 27, the film of the window part 18 is compressed to increase the density. Specifically, the film of the window portion 18 is compressed by performing heat sealing, ultrasonic bonding, high-frequency bonding, pressure bonding, or the like. Thereby, the vicinity of the notch part 24 can be reinforced.

Fig. 21 is a modification of the window portion 18 of the paper cover 1 according to the seventh embodiment. In FIG. 21(a) , the opening 19 is formed in the paper lid 1, and the notch 24 is not formed, but is formed as another member. This other member is the second sealing portion 28, three examples of which are illustrated on the right side of Fig. 21(a). Below, starting from the top, the description of the three examples continues in order.

In addition, film, paper material, aluminum, nonwoven fabric, rubber, cloth, etc. can be used for any second sealing part 28 . In addition, these materials may be used for the auxiliary second sealing part 28a.

The uppermost second sealing portion 28 has a notch portion 24 formed in the center. In FIG. 21(a) , the second sealing portion 28 is circular, but it may have any shape as long as it is larger than the size of the opening 19 . exist A releasable adhesive is applied to the surface of the second sealing portion 28 that faces the opening 19 , and the second sealing portion 28 is bonded to the periphery of the opening 19 . Alternatively, the second sealing portion 28 may be bonded around the opening 19 by heat sealing, ultrasonic bonding, or high-frequency bonding.

Thereby, the straw can be inserted from the notch part 24.

The middle second sealing portion 28 is formed in a donut shape, and a sub-second sealing portion 28 a smaller than the second sealing portion 28 is formed above the second sealing portion 28 . The second sealing portion 28 is formed with the notch portion 24 as described above and is joined around the opening portion 19 . The auxiliary second sealing part 28a is coated with a releasable adhesive and is joined to the second sealing part 28. In addition, as long as the notch portion 24 is not formed in the auxiliary second sealing portion 28a, the notch portion 24 of the second sealing portion 28 is not exposed, so it is more hygienic. Then, by peeling off the auxiliary second sealing portion 28a from the second sealing portion 28, the straw can be inserted from the notch portion 24. In addition, the notch portion 24 may also be formed in the auxiliary second sealing portion 28a.

In this way, by providing the auxiliary second sealing portion 28a, the notch portion 24 formed in the second sealing portion 28 can be reinforced like the above-mentioned reinforcing portion 27.

The lowermost second sealing portion 28 is formed in a circle shape, and an auxiliary second sealing portion 28 a smaller than the second sealing portion 28 is formed above the second sealing portion 28 . A part of the outer periphery of the auxiliary second sealing portion 28a is not cut off, but is integrated with the second sealing portion 28. Therefore, by opening the auxiliary second sealing portion 28 a from the second sealing portion 28 , the straw can be inserted from the notch portion 24 .

In addition, by printing on at least one of the second sealing portion 28 and the auxiliary second sealing portion 28a, a mark can be provided to identify the insertion opening of the straw.

In addition, it is desirable that the notch portion 24 has a shape and size that can correspond to paper straws or straws with blunt tips.

FIG. 21( b ) shows an example in which the window part 18 and the notch part 24 are formed in the cover part 1 , and the notch part 24 is covered with the second sealing part 28 . The size of the second sealing part 28 is larger than the size of the window part 18, but it is not limited to this.

The uppermost second sealing portion 28 may be peeled off from the window portion 18 using a releasable adhesive. Alternatively, about half of the outer periphery of the second sealing portion 28 may be welded to the window portion 18 by heat sealing or the like to allow the second sealing portion 28 to be flipped.

The middle second sealing portion 28 is formed in a circle shape, and the auxiliary second sealing portion 28a can be peeled off from the second sealing portion 28 using a releasable adhesive. Alternatively, about half of the outer periphery of the auxiliary second sealing portion 28a may be welded to the second sealing portion 28 by heat sealing or the like to allow the auxiliary second sealing portion 28a to be flipped. The second sealing portion 28 may be formed with a notch portion 24 corresponding to the notch portion 24 of the window portion 18 , or may be formed with an opening.

The lowermost second sealing portion 28 is formed in a circle shape, and an auxiliary second sealing portion 28 a smaller than the second sealing portion 28 is formed above the second sealing portion 28 . A part of the outer periphery of the auxiliary second sealing portion 28a is not cut off, but is integrated with the second sealing portion 28. In addition, the second sealing portion 28 is formed with a notch portion 24 or an opening corresponding to the notch portion 24 of the window portion 18 .

Therefore, by opening the auxiliary second sealing portion 28 a from the second sealing portion 28 , the straw can be inserted from the notch portion 24 . In addition, the second sealing part 28 in FIG. 21(a) and FIG. 21(b) may be formed of two sealing parts (for example, semicircular or rectangular), and a part thereof may overlap by several millimeters. Alternatively, one end of the second sealing portion 28 may be bent upward to be grasped by fingers.

(Eighth Embodiment)

FIG. 22(a) illustrates a cross-sectional view of the paper cover 1 according to the eighth embodiment together with a partial enlarged view. In this embodiment, the recessed portion 35 is formed in the recessed portion of the top cover 2 . In addition, the top cover portion 2 is joined to The engaging portion 36 is engaged with the curling portion 22 . Furthermore, the circumferential convex portion 37 is formed by pressing the portion other than a portion of the second tapered portion 11 . In addition, although the drawing is simplified, the curled portion 9 and the curled portion 22 are curled outward. In addition, in order to simplify the drawing, the drinking port 5 is not illustrated.

To give an example of the dimensions of the paper cover 1, the diameter is about 70 mm to 140 mm, the overall height H1 of the paper cover 1 is 12 mm to 20 mm, and the height H2 from the curled part 9 to the peripheral wall of the top cover part 2 is 3.5 mm~12mm. In addition, although it also depends on the capacity of the paper lid 1, from the viewpoint of drinking convenience, the height H2 of the peripheral wall is preferably 6 mm to 9 mm. By setting the height to about 36% to 53% of the height H1, A paper lid 1 with good balance can be obtained. Furthermore, the diameter of the curled portion 9 is ideally about 2 mm to 3 mm, and the height obtained by subtracting the diameter of the curled portion 9 from the height H2 of the peripheral wall is larger than the diameter (height) of the curled portion. Thereby, even when the mouth is brought into contact with the curling portion 9 to suck a hot beverage from the drinking mouth 5, the temperature of the content decreases according to the height H2 of the peripheral wall, so the fear of burns can be reduced. As explained using Figure 25, the length L2 from the outer peripheral end (peripheral wall part) to the drinking port 5 is 1 mm to 15 mm, preferably 4 mm to 12 mm. Therefore, the length L2 from the drinking port 5 is combined with the height H2 of the peripheral wall. Together they are set to 4.5mm~27mm, preferably 15mm to 25mm. If the content is ingested through the peripheral wall, the worry of burns can be further reduced. In addition, although it looks different in the drawings, the dimensions of the paper cover 1 described above can also be applied to the fourth to seventh embodiments. In addition, the weight per unit area of the paper lid 1 of this embodiment is preferably less than 150g/m ² to 300g/m ² , and is preferably about 200g/m ² to 250g/m ² . By making the weight per unit area small in this way, when the paper lid 1 is attached to the container 20, the curled portion 22 of the container 20 will not be deformed or damaged. In addition, although the basis weight of the top cover part 2 and the second tapered part 11 may be the same or different, it is ideal that even if the same basis weight is adopted, by increasing the thickness of the top cover part 2 Thick to reduce density and make it soft.

The recessed portion 35 of the top cover 2 can be formed by, for example, stamping processing, and its depth is ideally set to 0.8mm~ About 2.0mm. In addition, it is preferable to set the width of the recessed portion 35 so that at least the upper portion of the curled portion 22 can be accommodated at both ends of the top cover portion 2, or it can be set to a width slightly smaller than the width of the curled portion 22, so that the top cover portion can accommodate the width of the recessed portion 35. 2 elastically deforms at both ends to accommodate at least the upper part of the curled portion 22 . In this way, if at least the upper part of the curled part 22 is accommodated by both ends of the top cover part 2, the sealing performance of the paper cover 1 and the container 20 will improve.

In order to facilitate the formation of the recessed portion 35, it is ideal to heat the paper material (or the paper cover 1) by infrared rays or hot air to a temperature that does not affect the coating agent of the paper material (for example, 50°C to 100°C). Furthermore, it is preferable to heat the lower mold of the stamping machine that holds the paper material (or the paper cover 1 ) to 60°C to 130°C, more preferably 70°C to 100°C. In addition, only one of the heating of the paper material (or the paper cover 1 ) and the heating of the press processing machine may be performed, or both may be performed. By forming the recessed portion 35 in this way, as shown in the partial enlarged view, the space between the second tapered portion 11 and the recessed portion 35 becomes smaller, and the sealing performance when the paper lid 1 is attached to the container 20 is improved. In addition, the recessed portion 35 may be formed so that the end portion of the recessed portion 35 comes into contact with the curled portion 22 . In addition, the recessed portion 35 may be formed by punching a portion corresponding to the recessed portion 35 , or may be formed by turning the paper cover 1 over and punching both ends of the top cover 2 .

The engaging portion 36 is an annular (circle-shaped) member made of a paper material coated with a film or the like, and is bonded to the inside of the top cover 2 by, for example, heat sealing, ultrasonic bonding, or the like. In addition, both ends of the engaging portion 36 are free ends that are not joined to the top cover portion 2 . In addition, both ends of the engaging portion 36 may be tapered, may be formed into a forward taper with the same tapering direction as the tapered portion 21 , or may be formed into an inverted tapered shape with a different tapering direction from the tapered portion 21 . Tapered.

The engaging portion 36 has a size that can engage with the curling portion 22 . Although not shown in the figure, the free end of the engaging portion 36 is bent upward by the engagement of the curling portion 22 . The engaging portion 36 functions as a seal, thereby improving the sealing performance when the paper lid 1 is attached to the container 20 . The weight per unit area of the engaging portion 36 is preferably equal to or less than the weight per unit area of the paper lid 1, preferably about 150g/m ² to 250g/m ² .

Since the engaging portion 36 is annular, a space is formed inside the engaging portion 36, and this space functions as a heat insulating portion. Yes, the heat retention of the contents in the container 20 can be improved. In addition, when the container 20 is tilted, the space S1 formed by the curling portion 22, the top cover 2, and the engaging portion 36 can hold the contents from the container 20. Therefore, it is possible to reduce the flow of the contents from places other than the drinking mouth 5. Paper cover 1 leaks. In addition, the engaging portion 36 may have a solid shape instead of an annular shape, various corrugated paper with grooves may be used as the paper material, or a film (eg, polyethylene film) may be used instead of the paper material.

The inner peripheral surface of the second tapered portion 11 is compressed by pressing a partially recessed block member. The portion that is not pressed by the recessed portion of the block member remains as the convex portion 37 . The curled portion 22 passes over the convex portion 37 and enters the space formed by the second tapered portion 11 and the recessed portion 35 . The convex portion 37 functions to prevent the curled portion 22 entering the space formed by the second tapered portion 11 and the recessed portion 35 from falling off. In addition, a plurality of convex portions 37 may be provided on the inner peripheral surface of the second tapered portion. For example, two convex portions 37 may be formed separately in the vertical direction, and the curled portion 22 may be inserted between the two convex portions 37 . In this case, by making the distance between the two convex portions 37 narrower than the diameter of the curled portion 22, the curled portion 22 is flattened (deformed), and the paper lid 1 is fitted into the container 20. Therefore, the paper lid can be improved 1 and the tightness of the container 20. In addition, the convex portion 37 may also be provided on the inner circumference of the second tapered portion 11 intermittently rather than continuously.

22(b) to 22(d) are enlarged views when a film is used as the engaging portion 36, and will be described in order below. FIG. 22(b) shows a case where the curled portion 22 passes over the free end of the engaging portion 36 when the paper lid 1 is attached to the container 20 . In this case, the content from the container 20 can also be held in the space S1 formed by the curling portion 22, the top cover 2, and the engaging portion 36. Therefore, it is possible to reduce the amount of the content from the paper other than the drinking spout 5. Cover 1 is leaking. In addition, in Fig. 22(b), the aforementioned paper material provided with a coating such as a film can be used as the engaging portion 36. In this case, the shapes of both ends of the engaging portion 36 can be bent at right angles, or It can be bent into acute angles or obtuse angles. Thereby, the gap between the second tapered portion 11 and the end of the engaging portion 36 can be further reduced. In particular, the shapes at both ends of the engaging portion 36 are In the case of an obtuse angle as shown in FIG. 22(b) , the sealing properties of the paper lid 1 and the container 20 can be further improved.

FIG. 22( c ) shows a case where the end of the engaging portion 36 is not made a free end but is joined to the side surface of the second tapered portion 11 . The center of the engaging portion 36 and its periphery are joined to the top cover 2 , and the portion joined to the top cover 2 and the portion joined to the side surface of the second tapered portion 11 are portions that are not joined anywhere. When the paper lid 1 is attached to the container 20, the curled portion 22 comes into contact with the portion that is not joined anywhere, and the film forming the engaging portion 36 elastically deforms toward the paper lid 1, whereby the paper lid 1 is fitted into the container 20 . Therefore, even when the container 20 is tilted, the film forming the engaging portion 36 functions so that the contents from the container 20 do not leak. Therefore, the contents do not leak from the paper lid other than the drinking spout 5 1 leak.

In addition, the space portion S1 is formed by the top cover portion 2 , the second tapered portion 11 , the engaging portion 36 , and the curled portion 22 . For example, even if the paper container 20 is firmly held by hand and the container 20 is deformed, the space portion S1 follows the deformation or functions as a buffer, so the paper lid 1 is not easily detached from the container 20 .

FIG. 22(d) shows a case where both ends of the engaging portion 36 are joined to the side surfaces of the second tapered portion 11 instead of the engaging portion 36 being joined to the top cover portion 2 . In this case, when the paper lid 1 is attached to the container 20 , the film forming the engaging portion 36 elastically deforms toward the paper lid 1 , whereby the paper lid 1 and the container 20 are fitted. Therefore, even if the container 20 is tilted, the film forming the engaging portion 36 functions so that the contents from the container 20 do not leak. Therefore, the contents do not leak from the paper lid 1 except the drinking spout 5 . The aforementioned paper material provided with a coating such as a film can be used as the engaging portion 36 . In this case, it is preferable to make the engaging portion 36 have a solid shape and join the engaging portion 36 to the top cover 2 . Due to the manufacturing process, the flatness of the top cover part 2 may be deteriorated, and the content may leak from the top cover part 2 and the curled part 22 due to the deterioration of the flatness of the top cover part 2 . Therefore, by engaging the curled portion 22 to maintain a flat The flat engaging portion 36 can reduce the worry of the aforementioned leakage. In addition, the shape of the engaging portion 36 may be annular.

In addition, the various joining methods described above can be applied to the joining of the engaging portion 36 . In addition, films other than polyethylene films may be used as the film. In addition, as long as the film can be elastically deformed, other materials such as a paper material or an air-laid material with pulverized pulp laminated on the film can be bonded to the film.

In addition, in FIGS. 22(b) to 22(d) , the recessed portion 35 and the convex portion 37 may be formed or may be omitted. When the recessed portion 35 is formed, a part of the engaging portion 36 may be joined to the recessed portion 35 .

In addition, in Figures 22(a) to 22(d), when the content of the container 20 is a hot beverage such as hot coffee, the pressure of the space closed by the paper lid 1 and the container 20 increases, so , the adhesion of the film forming the engaging portion 36 will be improved. Thereby, the sealing performance of the paper lid 1 and the container 20 can be improved.

22(e) to 22(g) are modifications in which a paper material provided with a coating such as a film is used as the engaging portion 36, and will be described in order below. In FIG. 22(e) , the end portion of the engaging portion 36 is formed into a shape that substantially covers the outside of the curled portion 22 by press processing. The contact surfaces of the recessed portion 35 and the engaging portion 36 are joined. The end of the engaging portion 36 may be a free end, or may be engaged with the second tapered portion 11 . When the end of the engaging portion 36 is a free end, the distance of the end of the engaging portion 36 is set so that the free end of the engaging portion 36 is bent upward by engaging with the curling portion 22 . Just size.

When the bottom part of the paper cup is used as the paper cover 1, a seam between paper materials is formed inside the peripheral wall of the paper cover 1, and the contents of the container 20 may leak through the seam. However, the end portion of the engaging portion 36 presses a part of the joint inside the peripheral wall of the paper cover 1 to seal it. Therefore, the content can be prevented from leaking from the paper cover 1 along the seam. Thereby, even when the container 20 is tilted, the engaging portion 36 covers the outside of the curled portion 22 , so the contents do not leak from the paper lid 1 except for the drinking spout 5 . Furthermore, due to the space portion S1 formed by the top cover portion 2, the second tapered portion 11, the engaging portion 36, and the curling portion 22, even if the paper container 20 is firmly held with the hand, the container 20 may be damaged. When deformed, the space portion S1 follows the deformation due to the elasticity of the space portion S1 or functions as a buffer, so the paper lid 1 is not easily detached from the container 20 .

Furthermore, when the drinking spout 5 is formed in a certain part of the seam inside the peripheral wall of the paper lid 1, the contents may leak from the seam. Therefore, it is desirable that the drinking spout 5 is provided at a position different from the joint on the inside of the peripheral wall of the paper cover 1 (a position that does not interfere).

In addition, if the engaging portion 36 in FIG. 22(e) is made of a film and the elasticity of the film is used to engage the engaging portion 36 with the curled portion 22, the adhesion between the engaging portion 36 and the curled portion 22 will be further improved. .

In FIG. 22( f ), the end portion of the engaging portion 36 including the convex portion 36 a and the concave portion 36 b is formed into a shape that substantially covers the outer and inner sides of the curled portion 22 by press processing. As described above, if the end portion of the engaging portion 36 presses a part of the joint inside the peripheral wall of the paper cover 1 to seal it, it is possible to prevent the content from leaking from the paper cover 1 along the seam. Furthermore, the recessed part 36b of the engaging part 36 presses a part of the joint formed inside the peripheral wall of the container 20, so that it can be sealed. Therefore, the content can be prevented from leaking from the paper lid 1 along the joint inside the peripheral wall of the container 20 .

Thereby, even when the container 2 is tilted, the engaging portion 36 covers the outside and the inside of the curled portion 22 , so the contents do not leak from the paper lid 1 except for the drinking spout 5 . In addition, the drinking spout 5 may be provided at a portion where the recessed portion 35 and the engaging portion 36 are in contact.

FIG. 24 is a schematic view and a cross-sectional view showing an example of the engaging portion 36 in FIG. 22(f) . As shown in FIG. 24 , the engaging portion 36 has a circular shape and is formed with a convex portion 36 a as a first portion, a recessed portion 36 b as a second portion, and an opening 36 c. The outer diameter of the engaging portion 36 is larger than the outer diameter of the bottom cover 4 . Therefore, when the engaging portion 36 is fitted into the top cover portion 2 , the end portion of the engaging portion 36 may be bent toward the container 20 side. Thereby, the sealing performance of the paper lid 1 and the container 20 is improved. In this way, when the outer diameter of the engaging portion 36 is made larger than the outer diameter of the bottom cover portion 4 and the engaging portion 36 is embedded in the top cover portion 2 , the top cover portion 2 and the engaging portion 36 can also be omitted. Bonding by heat sealing, etc.

In addition, the thickness of the engaging portion 36 is about 0.7 mm to 2.0 mm except for the convex portion 36a and the concave portion 36b. By setting the thickness of the engaging portion 36 in this manner, the strength of the top cover portion 2 and the recessed portion 35 can be improved, and the flatness of the top cover portion 2 and the recessed portion 35 can be improved. In addition, elasticity (elasticity) can be provided to the convex portion 36a, and the convex portion 36a can follow the deformation of the curled portion 22. In addition, although the convex portion 36a is semicircular in order to engage with the curling portion 22, it may also be in an inverted U-shape or an inverted V-shape. Furthermore, when engaging the convex part 36a with the curled part 22, the size of the convex part 36a (the size of a semicircle, etc.) may be made smaller than the size (diameter) of the curled part 22, and the curled part 22 may be deformed. To engage the curled portion 22 with the convex portion 36a. In addition, the recessed portion 36b may be linear.

The convex portion 36a and the concave portion 36b are formed by press processing as described above. The convex portion 36 a is shaped to cover the outside of the curled portion 22 , and the recessed portion 36 b is shaped to cover the outside of the curled portion 22 . That is, the curled portion 22 has a shape in which the convex portion 36a and the concave portion 36b cover it. In addition, it is not necessary to cover all the curled portions 22 with the convex portions 36a and the concave portions 36b.

As mentioned above, the engaging portion 36 is a paper material provided with a coating such as a film. The pressing process to form the convex portion 36a and the recessed portion 36b may be performed in a state where the film is joined, or the film may be tensioned after the pressing process. After the convex portion 36 a is formed, if a film is placed in tension on the surface of the convex portion 36 a facing the curled portion 22 , the elasticity of the film can be used to engage the convex portion 36 a with the outside of the curled portion 22 .

The opening 36c is an alignment opening for engaging the engaging portion 36 with the recessed portion 35, and its size can be set appropriately. In addition, the opening 36 c may be omitted, and the outer periphery of the engaging part 36 may be used for alignment with the recessed part 35 , or a notch may be formed in the engaging part 36 for alignment with the recessed part 35 . Bit.

22(g) is an example in which the convex part 37 is omitted from FIG. 22(a), and a paper material having elasticity (cushioning properties) is used as the paper material of the engaging part 36. In addition, a coating such as a film is provided on at least one side (the side facing the container 20 ) of the elastic paper material. Various types of corrugated paper can be used as the elastic paper material. Corrugated paper has excellent cushioning and rigidity due to grooves, but its ends have weak rigidity and are prone to elastic deformation. When corrugated paper is used as the engaging portion 36, the end portion engages with the curling portion 22 and is elastically deformed. Therefore, the sealing performance of the paper lid 1 and the container 20 can be improved.

As the elastic paper material, a paper material and foamed polyethylene may be laminated, or an embossed soft paper material or air laid may be laminated. become. In this case, it is preferable to provide a coating such as a film or a waterproofing agent on at least one side of the paper material (the side facing the container 20). Alternatively, an elastic paper material may be laminated between paper materials. In addition, various non-woven fabrics can be used instead of elastic paper materials.

In addition, for air-laid parts, the heat seal of the air-laid parts can be heat-sealed with a film instead of laminated with paper materials to prevent burning and make it tight. In this way, the engaging portion 36 can be composed of a coating (waterproof layer) and an elastic layer.

Alternatively, as the elastic paper material, a plurality of tissue papers may be stacked, and a coating layer may be provided on the stacked tissue papers.

In addition, the free end of the engaging portion 36 in FIG. 22(g) may be formed into a tapered shape, may be formed into a forward tapered shape in the same tapering direction as the tapered portion 21, or may be formed into a tapered direction and a tapered shape. The shaped portion 21 has a different inverse taper shape.

Alternatively, the size of the end of the engaging portion 36 may be set such that the free end of the engaging portion 36 is bent upward (toward the space S1 ) by engaging with the curling portion 22 .

Alternatively, the distance between the second tapered portion 11 and the end of the engaging portion 36 may be smaller than the diameter of the curled portion 22 . is small, and the curled portion 22 is deformed to engage the curled portion 22 between the second tapered portion 11 and the end of the engaging portion 36 .

In addition, in FIGS. 22(e) to 22(g) , the convex portion 37 may be provided in the second tapered portion 11, or the recessed portion 35 may be omitted. In the examples of FIGS. 22(c), 22(e), and 22(f), when the second tapered portion 11 is provided with the convex portion 37, it is ideal that the end of the engaging portion 36 adopts a covering convex portion. 37 shape. Thereby, the contents of the container 20 are less likely to leak from the paper cover 1 .

In addition, in FIGS. 22(a) to 22(g) , if the taper angle of the second tapered portion 11 is made to be an acute angle smaller than the taper angle of the tapered portion 21 of the container 20, the space portion can be The S1 has a larger volume. Thereby, even when the container 20 is deformed, the paper lid 1 is not easily detached from the container 20 .

In addition, instead of the engaging portion 36 , an elastic member may be provided on the curled portion 22 side of the top cover 2 or on the inner peripheral surface of the second tapered portion 11 so as to engage with the curled portion 22 . As the elastic member, films, rubber, foamed polyethylene, polyurethane, silicon, hot melt adhesive, etc. can be used.

FIG. 27 shows another example of the cross-sectional view of the paper cover 1 of the eighth embodiment, showing two examples of FIG. 27(a) and FIG. 27(b) , and this other example will also be described in sequence. In addition, in these two examples, although the recessed portion 35 and the engaging portion 36 are omitted, the recessed portion 35 and the engaging portion 36 may be provided.

FIG. 27( a ) shows an example in which the curled portion 22 is fitted with the circumferential convex portion 37 provided on the inner circumference of the second tapered portion 11 . In this case, by making the inner diameter of the tip of the convex portion 37 into which the curled portion 22 enters smaller than the outer diameter of the curled portion 22, at least one of the curled portion 22 and the convex portion 37 can be deformed, so that the curled portion 22 and the convex portion 37 can be deformed. Since the convex portion 37 is fitted, the sealing performance of the paper lid 1 and the container 20 is improved.

In Fig. 27(b), the second tapered portion 11 is formed by a plurality of tapered angles with different angles. As an example, the taper angle of the strong tapered portion 11a is 5°, and the taper angle is increased compared with the weak tapered portion 11b described later. (get bigger). The weak tapered portion 11b is provided on the container 20 side (the curled portion 22 side) of the strong tapered portion 11a. As an example, its taper angle is 3°. Compared with the strong tapered portion 11a, the taper angle is weakened (smaller). ). In this way, by weakening (making the taper angle on the container 20 side (the curled portion 22 side) smaller), the curled portion 22 can easily enter the paper lid 1 .

In addition, in FIGS. 27(a) and 27(b) , the size of the convex portion 37 in the Z direction (height direction) is more than half the diameter of the curled portion 22, and preferably is equal to or more than the diameter of the curled portion 22. Thereby, the sealing performance of the paper lid 1 and the container 20 can be improved.

Fig. 23 is a cross-sectional view showing the sealing portion 8 of the paper cap 1 according to the eighth embodiment, showing three examples of Figs. 23(a) to 23(c), which will be described in order below. In addition, as the paper cover 1, the paper cover 1 other than the eighth embodiment can be used.

FIG. 23(a) shows the sealing portion 8 that seals the drinking spout 5 formed in the recessed portion 35 of the top cover portion 2 . A view of the drinking spout 5 viewed from above is shown below. The drinking spout 5 has the same shape as shown in FIG. 2( c ), and is opened in the direction of the arrow of the paper lid 1 by adding a notch to the recessed portion 35 . The sealing portion 8 is sized to cover the drinking spout 5 , but may be sized to cover a part of the drinking spout 5 . In addition, since it is difficult to visually confirm the drinking spout 5 , characters or pictures indicating the location of the drinking spout 5 may be printed on the sealing part 8 .

The sealing portion 8 has an inverted C shape, and the lower surface of the sealing portion 8 is joined to the recessed portion 35 by the adhesive 13 provided corresponding to the upper surface of the drinking spout 5 . In addition, the top end of the free end of the sealing portion 8 extends upward and becomes a handle portion of the sealing portion 8 .

The removable adhesive 14 is dispersedly applied to the surface opposite to the lower surface of the sealing portion 8 to which the adhesive 13 is applied. In addition, the releasable adhesive 14 may be applied to a plurality of places in a dotted manner, may be applied in a spiral shape, or may be applied continuously. When the handle is pulled in the direction shown by the arrow in FIG. 23(a) , the portion of the drinking spout 5 in which the groove is not formed functions as a hinge, and the drinking spout 5 opens. Furthermore, in the direction of When the sealing portion 8 is pulled in the direction of the arrow, the sealing portion 8 changes from an inverted C shape to a linear shape, and the releasable adhesive 14 faces the recessed portion 35 . In this state, by pressing the releasable adhesive 14 against the recessed portion 35, the opening state of the drinking spout 5 can be maintained.

In FIG. 23(b) , the position where the removable adhesive 14 is applied is different from that in FIG. 23(a) , and the removable adhesive 14 is applied to the upper back of the inverted C shape. When the handle is pulled in the direction shown by the arrow in Fig. 23(b) , the drinking spout 5 opens, the sealing portion 8 changes from an inverted C shape to a straight line, and the releasable adhesive 14 faces the recessed portion 35. In this state, by pressing the releasable adhesive 14 against the recessed portion 35, the opening state of the drinking spout 5 can be maintained.

In FIG. 23( c ), the sealing portion 8 has a linear shape, and the adhesive 13 and the releasable adhesive 14 are applied to the lower surface of the sealing portion 8 as the surface facing the recessed portion 35 . In addition, the adhesive 13 corresponds to the upper surface of the drinking mouth 5 . In this case, the releasable adhesive 14 may be applied so as to be bonded to the recessed portion 35 , or may be applied so as not to be bonded to the recessed portion 35 . When the removable adhesive 14 is bonded to the recessed portion 35, it is preferable to adhere a release paper to the recessed portion 35 bonded to the removable adhesive 14, or to coat the recessed portion 35 with silicone or Teflon (registered trademark). and other stripping agents. In addition, it is preferable that the release paper is provided so as not to interfere with at least a part of the adhesive 13 (drinking port 5 side).

After pulling the handle in the direction shown by the arrow in Fig. 23(c) to open the drinking spout 5, the opening of the drinking spout 5 can be maintained by pressing the releasable adhesive 14 into the recessed portion 35.

In this embodiment, the adhesive force of the adhesive 13 is greater than the adhesive force of the adhesive 14 . Instead or together with this, it is preferable that the amount of adhesive 13 applied is greater than the amount of adhesive 14 applied. In addition, the lower surface of the sealing portion 8 and the recessed portion 35 may be joined by heat sealing instead of the adhesive 13 . Alternatively, the sealing portion 8 may be folded in a Z-shape. Alternatively, the recessed portion 35 may not be formed and the flat top cover 2 may be used.

In addition, the drinking port 5 shown in FIG. 2 and FIG. 23 has a circular shape with respect to the size of the drinking port 5. If it is shaped, the diameter can be about 6mm~14mm. If it is rectangular, the length of the diagonal can be set to about 9mm~20mm. Thereby, larger ice will not pass through the drinking port 5, which can prevent children from eating larger ice by mistake.

(Method for manufacturing paper cover 1 in Figure 27(a))

FIG. 28 is a flowchart showing an example of the manufacturing method of the paper lid 1, and FIG. 29 is a schematic diagram of the manufacturing method of the paper lid 1. Hereinafter, the manufacturing method of the paper cover 1 is demonstrated. In addition, here, the manufacturing method of the paper cover 1 shown in FIG. 27(a) is demonstrated as an example.

The material forming the tapered portion 3 of the paper cover 1 (a coated paper material called a fan shape) is molded into a fan shape as shown in FIG. 26 , and in this state, the marking portion 40 is printed (step S1). Furthermore, printing may be performed before the marking portion 40 is molded into a sector shape. In addition, the marking part 40 may be printed on a paper material, or may be printed on a film as a coating. In addition, the number of indicator parts 40 is not limited to three. Ideally, following the printing of the marking portion 40, the notch portion 41 is formed.

The fan-shaped coated paper material is conveyed to the first processing station 61 . At the first processing station 61, the two ends of the fan-shaped coated paper material are partially overlapped and joined by, for example, ultrasonic joining. Thereby, the tapered portion 3 is formed (step S2). In this case, the tapered portion 3 is formed using a mold for molding the tapered portion 3 . In addition, the partially overlapped portion becomes a seam.

Furthermore, the lower edge of the fan-shaped coated paper material is bent inward by punching processing, thereby forming the second tapered portion 11 . In addition, the upper side of the fan-shaped coated paper material becomes a peripheral wall surrounding the curling portion 9 and the top cover portion 2, which will be described later.

The fan-shaped coated paper material after completion of processing at the first processing station 61 is transported to the fourth processing station 64 . Before describing the processing performed at the fourth processing station 64 , the top cover portion 2 The manufacturing method is explained.

The roll 60 is a coated paper material and is used for forming the top cover 2 . As shown in Fig. 29, the upper end and the lower end of the material roll 60 are corrugated. The following continues the description of this waveform.

FIG. 30 is a diagram showing a method of extracting the top cover 2 from the roll 60a. Here, two rows of the top cover portion 2 are extracted from the roll 60a. As shown in FIG. 30(a) , when the upper and lower positions of the first row and the second row of the top cover 2 are set to be the same when being pulled out, the portion shown in black will appear after the top cover 2 is pulled out. abandoned.

On the other hand, as shown in FIG. 30(b) , when the top cover 2 is pulled out with the upper and lower positions of the first row and the second row of the top cover 2 shifted, the number of discarded black parts is reduced. Furthermore, the width w of the roll 60a is not used, so the width of the roll 60a of the width w can be saved, the roll 60a can be used efficiently, and the manufacturing cost of the paper cover 1 can be reduced. In addition, it is preferable that the vertical offset amount between the first row and the second row of the top cover part 2 is about the radius of the top cover part 2 . In FIG. 30 , two rows of top cover portions 2 are extracted from the roll 60 a. However, three or more rows of top cover portions 2 may be removed depending on the width of the roll 60 a.

In this embodiment, three or more rows are extracted from one roll 60a in the method of FIG. 30(b). Therefore, the upper and lower ends of one row of the roll (the roll 60 shown in FIG. 29) are corrugated. . However, at least one of the upper end and the lower end may be linear. For example, when two rows of top cover portions 2 are taken out from one roll 60a in the method shown in FIG. 30(b) , the upper end or the lower end of the roll 60 is linear. Alternatively, the roll 60a shown in FIG. 30(a) may be used. In this case, one of the upper end and the lower end has a corrugated shape, and the other of the upper end and the lower end has a linear shape. In addition, when the roll 60a in FIG. 30(a) is a one-line roll, both the upper end and the lower end are linear, and such a roll can also be used.

Returning to FIG. 29 , the roll 60 is conveyed to the second processing station 62 . At the second processing station 62 the seal 8 shown in Figure 23 is joined to the roll 60. In the second processing station 62 , although in order to join two quantities of seals 8 The method is shown in the figure, but the number may be one, or three or more. The sealing part 8 is conveyed from a sealing roll (not shown). During the conveyance, the protective release paper is removed and the adhesive surface is joined to the roll 60 . A release paper different from the protective release paper may be provided at the portion where the adhesive 14 is joined in FIG. 29 so that the adhesive force of the adhesive 14 is weaker than that of the adhesive 13 .

The roll 60 with the seal 8 engaged is conveyed to the third processing station 63 . In the third processing station 63, the processing for forming the drinking spout 5 is carried out using a tool. Moreover, in the third processing station 63, the top cover part 2 is extracted using a tool. The drinking spout 5 is processed using the sealing portion 8 joined to the roll 60 as a mark.

The top cover part 2 is pulled out in the manner shown by the circular dotted line. Furthermore, the outer periphery of the top cover 2 is bent by press processing so that the top cover 2 is joined between the tapered portion 3 and the second tapered portion 11 having a U-shaped cross section (step S3). In addition, the processing of the drinking spout 5 and the processing of taking out the top cover 2 may be performed one at a time, or they may be performed at the same time.

Furthermore, the layout of the second processing station 62 and the third processing station 63 may be replaced, and the processing at the third processing station 63 may be performed before processing at the second processing station 62. In this case, the sealing part 8 is joined to the top cover part 2 using the drinking spout 5 as a mark.

In this embodiment, the top cover part 2 after completion of processing by the third processing station 63 is transported to the fourth processing station 64 .

In the fourth processing station 64, the top cover portion 2 whose outer periphery is bent by punching is inserted between the tapered portion 3 with a U-shaped cross section and the second tapered portion 11. In the state where the top cover part 2 is embedded between the tapered part 3 and the second tapered part 11, heat processing is performed (step S4). By this heat treatment, the film coated on the top cover 2 , the tapered portion 3 , and the second tapered portion 11 melts, and the top cover 2 , the tapered portion 3 , and the second tapered portion 11 are heat-sealed and joined. In addition, the tapered portion 3 forms a peripheral wall surrounding the top cover portion 2 . In addition, in the above description In step S2, the lower edge of the fan-shaped coated paper material is punched to form the second tapered portion 11. In step S3, the outer periphery of the top cover portion 2 is punched and bent. , but is not limited to this. For example, at least one of these press processes may be performed immediately before the heat treatment in step S4 or simultaneously with the heat treatment.

When the top cover 2, the tapered portion 3, and the second tapered portion 11 are heat-sealed and joined, it is preferable that the drinking spout 5 is formed away from the tapered portion 3 (also referred to as the peripheral wall surrounding the top cover). seams. Therefore, it is ideal to detect the mark provided at or near the seam with a detection device (not shown), and based on the detection result, rotate the top cover 2 to adjust the position of the drinking spout 5, and then perform the above-mentioned The heat seal.

In addition, the drinking port 5 may be formed after the top cover part 2 is joined to the tapered part 3 and the second tapered part 11 . Following the formation of the drinking spout 5, the sealing portion 8 can be formed, or the sealing portion 8 can be formed in a subsequent process.

By pressing the inner peripheral surface of the second tapered portion 11 with a partially recessed block member, a portion that is not pressed by the recessed portion of the block member is formed into a convex portion 37 (step S5). In addition, the convex portion 37 is formed at the upper end portion of the second tapered portion 11, but its position in the height direction can be appropriately adjusted by the shape of the block member. Furthermore, by adjusting the pressure of the pressing block member, the height of the convex portion 37 can be adjusted. In addition, the height of the convex portion 37 can be adjusted according to the weight per unit area of the second tapered portion 11 . After the convex portion 37 is formed, the heat-sealed top cover portion 2 , the tapered portion 3 and the second tapered portion 11 are transported to the fifth processing station 65 .

Next, in the fifth processing station 65, the curled portion 9 is formed by the curling mold 70 shown in FIG. 11 (step S6). Thereby, the paper lid 1 of FIG. 27(a) can be manufactured. In addition, the above-mentioned manufacturing method is an example, and modifications, such as replacing the order of a part of a process, are possible.

Another effect of improving the heat retention of the contents in the container 20 can be obtained by the paper cover 1 . Hereinafter, the improvement in heat retention achieved by the paper cover 1 of the fifth embodiment will be described.

FIG. 18 is a diagram showing a joining example of the top cover part 2 and the engaging part 12 of the paper cover 1 of FIG. 9(a) . FIG. 18(a) is a joining example in which the entire surface of the top cover 2 and the top cover 2a (see FIG. 10 ) of the engaging portion 12 is coated with an adhesive 25 for adhesion. There is no space part 26 between 2a. Fig. 18(b) is a joining example in which the adhesive 25 is applied and adhered to the central portion of the top cover portion 2a (see Fig. 10) of the top cover portion 2 and the engagement portion 12, and a space portion 26 is present. FIG. 18( c ) is a joining example in which the adhesive 25 is applied to the outer periphery of the top cover 2 a (see FIG. 10 ) of the engaging portion 12 for adhesion, and a space 26 is present.

150cc of 75°C water (content) was poured into the 5-ounce container 20, and the temperature of the water (content) was measured for each elapsed time while the paper lid 1 was inserted. sexual experimentation. In addition, the test was conducted in two states: a state in which the drinking port 5 was closed and a state in which the drinking port 5 was opened.

In addition, as a comparative example, measurement was also performed using a currently used plastic cap. This plastic cover is not a type in which the top cover part 2 and the engaging part 12 are joined, so there is no adhesive part.

As shown in Table 1, the thermal insulation performance of the paper cover 1 is not inferior to that of the currently used plastic cover, but also the measurement example in which the adhesive 25 is coated on the central part and the measurement example in which the adhesive 25 is coated on the periphery are better. The thermal insulation is 1°C to 2°C better than plastic lids. This is because of the thermal insulation effect of the space portion 26 . In this way, the heat preservation effect of the environmentally friendly paper cover 1 can be confirmed. In addition, the joining of the top cover part 2 and the engaging part 12 is not limited to adhesion, and any joining method can be used as long as the space part 26 can be formed.

The above-described embodiments are preferred examples of the present invention. However, the present invention is not limited to this, and the above-described embodiments may be appropriately combined, or part of the configuration may be omitted. Alternatively, a part of the structure may be deformed. For example, a notch may be added to the curled portion 9 to weaken the rigidity of the curled portion 9 . The container 20 can be embedded from the outside using the curled portion 9 provided with the slot. Furthermore, although it is disclosed that a part of the press processing machine is heated during the pressing process, a part of the ultrasonic joining device (for example, the part holding the paper cover 1) may be heated to 50° C. to 50° C. during ultrasonic joining. Around 85℃. In this way, by heating the paper lid 1 for production, even when the content of the container 20 is a hot beverage (60°C to 100°C), the paper lid 1 is not easily deformed into the shape before the stamping process. Therefore, The fear of the paper lid 1 being detached from the container 20 can be reduced.

In addition, at least one member of the engaging portion 12, the base portion 12a, the engaging portion 12b, the curling portion 29, and the engaging portion 36 may be an air-flow type pulp in which crushed pulp is laminated. In this case, the unit area weight of the air-laid mesh component is 20g/m ² to 100g/m ² , preferably 40g/m ² to 60g/m ² . Furthermore, it is desirable to laminate films (for example, polyethylene films) on both sides of the air-laid element and to bond them by ultrasonic bonding. By using air-laid mesh, it can function as a buffer member or seal.

In this way, various modifications can be implemented without departing from the gist of the present invention.

1: cover unit

2:Top cover

3: Tapered part

4: Bottom cover

20:Container

21:Tapered part

22: Curly part

23:Bottom

Claims (13)

A paper lid, which includes: a lid main body made of paper material, mounted on a container having an opening, a tapered shape, and a curled portion; and a top lid in a state of being surrounded by the outer periphery of the lid main portion; the paper and The cover main body side curling portion is provided on the cover main body and is located above the engaging portion; the cover main body is formed in a tapered shape in which the tapered portion becomes tapered from the upper end of the cover main body toward the lower end. Shape: The outer periphery of the top cover is bent toward the side opposite to the curled portion of the cover main body, and the bent portion is joined to the cover main body; the portion other than the outer periphery of the top cover is provided on the hook Between the joint portion and the side curled portion of the cover body; the inner diameter of the front end of the tapered portion is smaller than the outer diameter of the curled portion of the container, and the opening of the container is closed, which is the state of the container. In a state where the curled portion is in contact with the tapered portion on the inner side of the tapered portion before the engaging portion, the height from the curled portion on the cover main body side to the top cover portion is 3.5 mm to 12 mm. A paper lid, which includes: a lid main body made of paper material, mounted on a container having an opening, a tapered shape, and a curled portion; and a top lid in a state of being surrounded by the outer periphery of the lid main portion; the paper The cover has: An engaging portion is provided on the lid main body, has a tapered portion oriented in the same direction as the tapered portion of the container, and engages with the curled portion of the container from the outside of the curled portion of the container; and the lid main body side The curling portion is provided on the cover main body portion and is located above the engaging portion; the cover main body portion is formed into a tapered shape in which the tapered portion becomes smaller toward the lower end from the upper end of the cover main body portion; the top portion The outer periphery of the cover portion is bent toward the side opposite to the curled portion of the cover main body, and the bent portion is joined to the cover main body; the portion other than the outer periphery of the top cover portion is provided between the engaging portion and the aforementioned Between the curled portions on the cover main body side; the inner diameter of the front end of the tapered portion is formed to be smaller than the outer diameter of the curled portion of the container, and the opening of the container is closed. The engaging portion is in contact with the tapered portion on the inner side of the tapered portion; the top cover portion is provided with a drinking port; and the length from the outer peripheral end of the top cover portion to the drinking port is 1 mm to 15 mm. The paper lid according to claim 1, wherein the top lid portion is provided with a drinking port. The paper lid according to claim 1 or 2, wherein a joint between the paper material and the paper material is formed in the lid main body, and the drinking port is provided at a position that does not interfere with the joint. The paper lid according to claim 1 or 2, wherein the lid main body is provided with a peripheral wall portion connected to the side curling portion of the lid main body, and a marking portion is formed on the peripheral wall portion, and the marking portion is There are multiple signs associated with the contents of the aforementioned container. The paper cover as claimed in claim 5, wherein, The lid main body side curling portion is deformable, and based on the deformation of the lid main body side curling portion, the contents can be identified based on the plurality of marks. The paper lid according to claim 1 or 2, wherein the engaging portion deforms the curled portion of the container and engages with the curled portion. The paper cover according to claim 1 or 2, wherein the size of the curled portion on the side of the cover main body is different from the curled portion. The paper lid according to claim 1 or 2, wherein the top lid portion is provided with a visual confirmation portion for visually confirming the inside of the container. The paper cap according to claim 2 or 3, which is provided with a sealing portion, and the sealing portion has: a first joint portion joined to the drinking mouth; and a pinch portion capable of opening the drinking mouth. The paper cap according to claim 10, wherein the sealing part has a second joining part joined to the top cover part, and the joining force of the first joining part is greater than the joining force of the second joining part. The paper lid according to claim 1, wherein the engaging portion has a circumferential convex portion. The paper cover according to claim 1, wherein the paper material of the cover main body is coated with a biodegradable film.