Containers and methods for manufacturing containers

Abstract

To provide a container that allows for easy separation of the heat-generating part from other components. [Solution] The container is a container that can hold contents and is formed in a plate shape having a paper layer containing paper and a heating layer laminated on the paper layer and generating heat by electromagnetic induction, and comprises a bottom portion that constitutes the bottom surface of the container, a side portion connected to the end of the bottom portion and constituting the side surface of the container, and an auxiliary portion provided on the side portion that assists in the operation of tearing the side portion toward the bottom portion. This provides a container in which the heating portion and other components can be easily separated.

Description

[Technical Field]

[0001] This invention relates to a container and a method for manufacturing a container. [Background technology]

[0002] Patent Document 1 discloses an induction heating cooking container that generates heat by electromagnetic induction, characterized in that the heating sheet that generates heat by electromagnetic induction is made of a multilayer sheet in which a heat-resistant adhesive is laminated on the inside of paper. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2004-344410 [Overview of the project] [Problems that the invention aims to solve]

[0004] Incidentally, in some cases, containers made primarily from paper are equipped with a heating element containing a magnetic material such as metal, allowing the contents of the container to be heated by induction heating (IH). For this type of container, there is a demand to separate the heating element from the other components when disposing of the container after use. The present invention aims to provide a container that allows for easy separation of the heating element from other components. [Means for solving the problem]

[0005] To this end, the technology disclosed herein is a container capable of holding contents, comprising a bottom portion that constitutes the bottom surface of the container, a side portion that is connected to the end of the bottom portion and constitutes the side surface of the container, and an auxiliary portion provided on the side portion that assists in the operation of tearing the side portion toward the bottom portion.

[0006] Here, the side portion is provided at the upper end and has a curled portion that is formed in a curled shape, and the auxiliary portion is provided at the curled portion. Furthermore, the auxiliary portion is preferably formed in a linear shape from the top to the bottom of the container. Furthermore, the auxiliary portion may be a half-cut structure in which the groove does not penetrate in the thickness direction of the member. Furthermore, the half-cut structure may be formed on the outer side of the side portion. Furthermore, the side portion has a water-resistant layer on both the inside and outside of the side portion that suppresses the penetration of moisture, and the half-cut structure is preferably formed by cutting a part of the outer water-resistant layer. Furthermore, the half-cut structure is formed on the side portion and the curl portion, and the depth of the groove of the half-cut structure formed on the curl portion is preferably deeper than the depth of the groove of the half-cut structure formed on the side portion. Furthermore, the peel strength between the heating layer and the paper layer at the bottom should be less than the peel strength between the bottom and the side. Furthermore, the side portion is formed by a member surrounding the bottom portion and has a joint where the ends of the member are joined together, and the auxiliary portion is preferably positioned on the opposite side of the joint, with the central part of the bottom portion in between, when the container is viewed from a direction along the vertical direction.

[0007] Furthermore, for the purposes described herein, the technology disclosed herein is a container capable of holding contents, comprising: a paper layer containing paper; a heating layer laminated on the paper layer and generating heat by electromagnetic induction, formed in the shape of a circular plate, and comprising a bottom portion constituting the bottom surface of the container; a side portion formed in the shape of a cylinder and connected to the outer circumference of the bottom portion, and constituting the side surface of the container; a curl portion provided at the upper end of the side portion and formed in a curled shape; a first half-cut portion provided on the outside of the side portion and formed along the vertical direction of the side portion; a second half-cut portion provided in the curl portion at a position along the first half-cut portion; and an indicator portion indicating the positions of the first half-cut portion and the second half-cut portion.

[0008] Also, for such an object, the technology disclosed in this specification includes a step of forming side portions that constitute the side surface of the container, a step of forming a half-cut configuration on the side portions, a step of laminating a heat-generating layer that generates heat by electromagnetic induction on a paper layer formed of paper to form a bottom portion that constitutes the bottom surface of the container, and a step of connecting the side portions and the bottom portion such that the half-cut structure of the side portions faces the end portion of the bottom portion. It is a method for manufacturing a container comprising these steps.

Effects of the Invention

[0009] According to the present invention, it is possible to provide a container in which the heat-generating portion and other constituent portions can be easily separated.

Brief Description of the Drawings

[0010] [Figure 1] It is an overall perspective view of the container of the present embodiment. [Figure 2] It is a partial cross-sectional view of the container of the present embodiment. [Figure 3] It is a partial cross-sectional view of the bottom portion of the present embodiment. [Figure 4] It is a partial cross-sectional view of the body portion of the present embodiment. [Figure 5] (A) and (B) are explanatory views of the auxiliary portion of the present embodiment. [Figure 6] It is an explanatory view of the formation position of the auxiliary portion of the present embodiment. [Figure 7] It is an explanatory view of the guide portion of the present embodiment. [Figure 8] (A) and (B) are explanatory views of the material of the container of the present embodiment. [Figure 9] It is a flowchart showing the manufacturing method of the container of the present embodiment. [Figure 10] (A) and (B) are explanatory views of the containers of Modification 1 and Modification 2. [Figure 11] (A) and (B) are explanatory views of the containers of Modification 3 and Modification 4. [Figure 12](A) and (B) are explanatory diagrams of the containers for Modification 5 and Modification 6. [Modes for carrying out the invention]

[0011] This embodiment will be described below with reference to the attached drawings. <Container 1> Figure 1 is an overall perspective view of the container 1 of this embodiment. Figure 2 is a partial cross-sectional view of the container 1 of this embodiment.

[0012] As shown in Figure 1, the container 1 of this embodiment has a bottom portion 10 that forms the base and a body portion 30 that forms the sides. The container 1 is capable of accommodating contents such as food in its inner portion 1A. In this description of the embodiment, the side opposite to the inner portion 1A and not containing contents will be referred to as the outer portion 1B.

[0013] Container 1 can be used with induction heating (IH) cooking appliances. By placing container 1 on a cooking appliance, the heating layer having a magnetic material (described later) generates heat, and the contents inside can be heated. As shown in Figure 1, container 1 in this embodiment has a relatively deep bowl shape. Container 1 can hold noodles such as ramen and udon, or foods containing broth such as hot pot dishes.

[0014] Furthermore, in this embodiment, container 1 may be frozen with contents such as food placed inside 1A. Thus, container 1 is designed to be used in a wide temperature range (-20°C to 100°C), from a frozen state to a heated state.

[0015] In this embodiment, container 1 is a round (circular) container overall. However, the shape of container 1 is not limited to round, and it may be a container of other shapes, such as a square container with a rectangular bottom 10.

[0016] The bottom portion 10 is located on the lower side in the vertical direction when the container 1 is used for cooking or eating (hereinafter referred to as the "usage state"). The bottom portion 10 forms the bottom surface of the container 1.

[0017] Furthermore, the bottom portion 10 of this embodiment has a bottom body portion 11 that mainly constitutes the bottom portion 10, and a connecting portion 13 that forms a connection point between the bottom portion 10 and the body portion 30.

[0018] The base body portion 11 of this embodiment is formed in a substantially circular shape. The size of the base portion 10 is not particularly limited, but for example, the diameter can be about 20 cm to 25 cm. As shown in Figure 2, the cross-section of the bottom body portion 11 is formed in a substantially straight line along the intersecting direction that crosses the vertical direction. The bottom body portion 11 faces the contents on the inside 1A and faces an induction cooker or the like on the outside 1B.

[0019] As shown in Figure 2, the connecting portion 13 is provided at the end of the bottom body portion 11. Since the bottom body portion 11 in this embodiment is formed in a substantially circular shape, the connecting portion 13 is provided on the outer circumference of the bottom body portion 11 so as to surround it. Furthermore, the upper end of the connecting portion 13 is continuously connected to the bottom body portion 11 in the vertical direction, and the lower end is a free end. In this way, the connecting portion 13 is formed to bend relative to the bottom body portion 11. In addition, the connecting portion 13 in this embodiment is formed along the vertical direction. The connecting portion 13 then connects to the leg portion 35 of the body portion 30, which will be described later, thereby forming a connection point between the bottom portion 10 and the body portion 30.

[0020] Next, we will explain the layer structure of the bottom section 10 in detail. Figure 3 is a partial cross-sectional view of the bottom 10 of this embodiment.

[0021] As shown in Figure 3, the bottom 10 of this embodiment has a paper layer 101 which serves as the base material, a heat-generating layer 103 provided on the inside 1A of the paper layer 101, an inner water-resistant layer 105 provided on the inside 1A of the heat-generating layer 103, and an outer water-resistant layer 107 provided on the outside 1B of the paper layer 101. The multiple layers constituting the bottom 10 are provided in the order of inner water-resistant layer 105, heat-generating layer 103, paper layer 101, and outer water-resistant layer 107 from the inside 1A to the outside 1B. In particular, the bottom 10 of this embodiment has water-resistant layers, the inner water-resistant layer 105 and the outer water-resistant layer 107, sandwiching the heat-generating layer 103 and the paper layer 101, respectively.

[0022] The paper layer 101 can be made from paper made from natural pulp or the like. The thickness of the paper layer 101 can be, for example, 260 μm or more and 460 μm, preferably 310 μm or more and 410 μm or less. The basis weight of the paper layer 101 can be, for example, 170 g / m². 2 The above is 370g / m² 2 Preferably, for example, 220 g / m² 2 The above is 320g / m² 2 The following is possible:

[0023] The heating layer 103 is made of pure aluminum foil or aluminum alloy foil. However, the heating layer 103 may be made of other materials as long as it contains a magnetic material and can generate heat by induction heating. The thickness of the heating layer 103 can be, for example, 4 μm or more and 13 μm, preferably 8 μm or more and 10 μm or less. The heating layer 103 is arranged so that the matte surface faces inward 1A and the glossy surface faces outward 1B.

[0024] The paper layer 101 and the heat - generating layer 103 are adhered to each other by pseudo - adhesion. For pseudo - adhesion, adhesives with pseudo - adhesive properties such as natural rubber - based solvent type, natural rubber - based solvent - free type, acrylic - based solvent type, acrylic - based emulsion type, hot - melt type, etc. can be used. And the peel strength between the paper layer 101 and the heat - generating layer 103 is smaller than the peel strength between the heat - generating layer 103 and the inner water - resistant layer 105. Also, the peel strength between the paper layer 101 and the heat - generating layer 103 is smaller than the peel strength between the paper layer 101 and the outer water - resistant layer 107. Note that the peel strength is the magnitude of the force required to peel the members adhered to each other. Also, the peel strength can be measured, for example, in a direction conforming to JIS Z 0238.

[0025] For the inner water - resistant layer 105, for example, polyethylene terephthalate (PET) can be used. The water - resistant layer in this embodiment is a layer that suppresses the penetration of moisture. The layer thickness of the inner water - resistant layer 105 can be, for example, 3μm or more and 23μm, preferably 8μm or more and 18μm or less. Also, the basis weight of the inner water - resistant layer 105 can be, for example, 7g / m 2 or more and 27g / m 2 or more, preferably, for example, 12g / m 2 or more and 22g / m 2 or less. And the paper layer 101 and the inner water - resistant layer 105 can be adhered, for example, using a heat - resistant adhesive. Also, the paper layer 101 and the inner water - resistant layer 105 may be laminated to the paper layer 101 by a heat - fusion method for the inner water - resistant layer 105 without using an adhesive.

[0026] For the outer water - resistant layer 107, for example, polyethylene (PE) can be used. The layer thickness of the outer water - resistant layer 107 can be, for example, 20μm or more and 40μm, preferably 25μm or more and 35μm or less. Also, the basis weight of the outer water - resistant layer 107 can be, for example, 17g / m 2 or more and 38g / m 2 or more, preferably, for example, 25g / m 2 or more and 30g / m 2 or less.

[0027] Next, the torso portion 30 of this embodiment will be described in detail.

[0028] As shown in Figure 1, the body portion 30 is provided around the bottom body portion 11. The body portion 30 is formed to rise upward from the bottom portion 10 in the vertical direction. The body portion 30 has an inner portion 1A capable of accommodating the contents and an outer portion 1B on the opposite side of the inner portion 1A. In addition, the body portion 30 in this embodiment is formed at an angle with respect to the vertical direction and is inclined. The upper inner diameter of the body portion 30 is larger than the lower inner diameter in the vertical direction. That is, the body portion 30 is formed to widen from the bottom to the top.

[0029] Furthermore, the body portion 30 of this embodiment has side portions 31 that constitute the side surface of the container 1, curled portions 33 formed at the upper end of the container 1, leg portions 35 that form the legs of the container 1, and joint portions 37 that form engagement points between the side portions 31. In addition, the body portion 30 has a guide portion 60 that guides the work content of the sorting work described later, and an auxiliary portion 50 that assists the work of the worker performing the sorting.

[0030] The side portion 31 of this embodiment is formed in an annular fan shape (see Figure 8(B) described later). The size of the side portion 31 is not particularly limited. The length of the side portion 31 in the intersecting direction of this embodiment corresponds to the length of the outer circumference of the bottom body portion 11. The height of the side portion 31 in the vertical direction can be, for example, 5 cm to 10 cm. As shown in Figure 2, the cross-section of the side portion 31 is formed in a substantially straight line along the vertical direction. The side portion 31 faces the contents on the inside 1A, and the outside 1B forms the area that the user touches or holds when eating.

[0031] The curled portion 33 is formed at the upper end in the vertical direction. The curled portion 33 is the part where the end of the side portion 31 is wrapped around the outer 1B over its entire circumference, resulting in a curled shape. As shown in Figure 2, the curled portion 33 has a circular cross-section. The curled portion 33 softens the contact point with the user's mouth when the container 1 is in use, for example. The curled portion 33 also increases the strength of the container 1 on its upper side.

[0032] The legs 35 are formed at the lower end in the vertical direction. The legs 35 protrude downward in the vertical direction from the bottom 10. The legs 35 are provided around the entire circumference of the container 1. The legs 35 function as legs for the container 1 when it is placed on an induction cooktop or a table. In this embodiment, the legs 35 position the bottom body 11 at a predetermined distance (for example, 0.5 cm to 0.7 cm) from the main surface of the induction cooktop or table. The legs 35 also increase the strength of the container 1 on its underside.

[0033] As shown in Figure 2, the leg portion 35 of this embodiment is U-shaped. The leg portion 35 connects to the base portion 10 by enclosing the connection portion 13 in a U-shape. The leg portion 35 is bonded to one surface 131 of the connecting portion 13 in the intersecting direction. Specifically, the inner water-resistant layer 303 of the leg portion 35 (described later) is connected to the outer water-resistant layer 107 of the connecting portion 13 (see Figure 3). In this embodiment, the inner water-resistant layer 303 of the leg portion 35 and the outer water-resistant layer 107 of the connecting portion 13 are bonded to each other relatively strongly using an adhesive. On the other hand, the leg portion 35 is not bonded to the other surface 132 in the direction of intersection of the connection portion 13. Specifically, the leg portion 35 is not actively bonded to the inner water-resistant layer 105, which will be described later, using adhesive. In other words, the leg portion 35 has a relatively strong adhesive force from the inside (one surface 131 side) to the connection portion 13, and a relatively low adhesive force from the outside (the other surface 132 side).

[0034] As shown in Figure 1, the joint 37 is the point where one end and the other end of the fan-shaped side portion 31 overlap and engage in the direction of intersection. In this embodiment, the joint 37 is strongly bonded to one end and the other end of the side portion 31 using an adhesive.

[0035] Figure 4 is a partial cross-sectional view of the torso portion 30 of this embodiment.

[0036] As shown in Figure 4, the body 30 of this embodiment has a paper layer 301 which serves as the base material, an inner water-resistant layer 303 provided on the inside 1A of the paper layer 301, and an outer water-resistant layer 305 provided on the outside 1B of the paper layer 301. The multiple layers constituting the body 30 are provided in the order of inner water-resistant layer 303, paper layer 301, and outer water-resistant layer 305 from the inside to the outside. In particular, the body 30 of this embodiment has water-resistant layers, the inner water-resistant layer 303 and the outer water-resistant layer 305, respectively, sandwiching the paper layer 301.

[0037] The paper layer 301 can be made from paper made from natural pulp or the like. The thickness of the paper layer 301 can be, for example, 300 μm or more and 500 μm, preferably 350 μm or more and 450 μm or less. The basis weight of the paper layer 301 can be, for example, 200 g / m². 2 The above is 400g / m 2 Preferably, for example, 250 g / m² 2 The above is 350g / m 2 The following is possible:

[0038] For example, polyethylene (PE) can be used for the inner water-resistant layer 303 and the outer water-resistant layer 305. The thickness of the inner water-resistant layer 303 and the outer water-resistant layer 305 can be, for example, 20 μm or more and 40 μm, preferably 25 μm or more and 35 μm or less. The basis weight of the inner water-resistant layer 303 and the outer water-resistant layer 305 can be, for example, 17 g / m². 2 The above is 38g / m² 2 Preferably, for example, 25 g / m² 2 The above is 30g / m 2 The following is possible: The paper layer 301 and the inner water-resistant layer 303 can be laminated to the paper layer 301 by heat fusion using the inner water-resistant layer 105 without the use of adhesive. Alternatively, a heat-resistant adhesive may be used for bonding. The bonding of the paper layer 301 and the outer water-resistant layer 305 is the same as that of the paper layer 301 and the inner water-resistant layer 303.

[0039] Next, the auxiliary unit 50 of this embodiment will be described in detail.

[0040] The auxiliary portion 50 includes a curl portion auxiliary portion 53 formed on the curl portion 33 and a side portion auxiliary portion 51 formed on the side portion 31. The curl section auxiliary section 53 is a part that assists the user when tearing (breaking) the curl section 33 of the container 1. In this embodiment, the curl section auxiliary section 53 uses a curl section half-cut line 53C that half-cuts the member constituting the curl section 33 (body blank material 903 (see Figure 8 described later)). The curl section half-cut line 53C is provided in the curl section 33 at a position along the side half-cut line 51C described later. In this embodiment, the curl section half-cut line 53C is continuous with the side half-cut line 51C described later.

[0041] Here, a half-cut is a linear groove formed in the target material. Furthermore, a half-cut is a groove that does not penetrate through the thickness direction of the target material, but is cut to about the middle of the material's thickness. In other words, a half-cut is a process that cuts partway through the layers of the target material.

[0042] In this embodiment, the curled portion half-cut line 53C is formed on the outer surface 1B of the side portion 31. The curled portion 33 is formed by rounding the end of the side portion 31 toward the outer surface 1B. Therefore, the curled portion half-cut line 53C is not exposed to the outside of the curled portion 33. In other words, the curled portion half-cut line 53C is difficult to see or impossible to see.

[0043] The side support portion 51 is a part that assists the user when tearing the side portion 31 of the container 1. In this embodiment, the side support portion 51 is composed of a side half-cut line 51C that half-cuts the member constituting the side portion 31 (body blank material 903 (see Figure 8 described later)). In this embodiment, the side support portion 51 is formed along the vertical direction, from the upper end to the lower end of the container 1. In this embodiment, the side half-cut line 51C is formed on the outer surface 1B of the side portion 31. Therefore, the side half-cut line 51C is exposed to the outside in the curled portion 33. In other words, the side half-cut line 51C is visible.

[0044] Figure 5 is an explanatory diagram of the auxiliary part 50 of this embodiment.

[0045] Furthermore, the auxiliary part 50 of this embodiment can be formed as follows. As shown in Figure 5(A), the curl portion auxiliary portion 53 is composed of a curl portion half-cut line 53C that partially cuts the outer water-resistant layer 305 and the paper layer 301 to a predetermined depth D1. In this embodiment, the curl portion half-cut line 53C is formed to a depth of more than half the thickness of the paper layer 101. In this embodiment, the groove of the curl portion half-cut line 53C is formed by cutting the outer water-resistant layer 305 in the thickness direction.

[0046] On the other hand, as shown in Figure 5(B), the side auxiliary portion 51 is composed of a side half-cut line 51C that partially cuts the outer water-resistant layer 305 and the paper layer 301 to a predetermined depth D2. The side half-cut line 51C in this embodiment is formed to be shallower than half the thickness of the paper layer 101. The groove of the side half-cut line 51C in this embodiment is formed by cutting the outer water-resistant layer 305 in the thickness direction. In addition, the groove of the side half-cut line 51C in this embodiment is formed by cutting a part of the outer water-resistant layer 305 in the surface direction of the side portion 31. In this embodiment, the depth D1 of the curled half-cut line 53C is deeper than the depth D2 of the side half-cut line 51C (D1 > D2).

[0047] The curled portion 33 is formed in a curled shape and overlaps, making it more difficult to tear compared to the flat side portion 31. Therefore, in this embodiment, the depth D1 of the curled portion half-cut line 53C formed on the curled portion 33 is made deeper than the depth D2 of the side half-cut line 51C formed on the side portion 31. This makes the curled portion 33 easier to tear. On the other hand, the side portion 31 is the part that contains liquids or other food inside 1A, and it is a part that should be designed to prevent contents from leaking out. Therefore, the depth D2 of the side half-cut line 51C formed on the side portion 31 is made shallower than the depth D1 of the curled portion half-cut line 53C formed on the curled portion 33. This makes it less likely for contents to leak out or for unintended breakage to occur in the side portion 31.

[0048] Figure 6 is an explanatory diagram showing the formation position of the auxiliary part 50 in this embodiment.

[0049] As shown in Figure 6, when the container 1 is viewed from above in the vertical direction, the auxiliary part 50 is positioned on a straight line L1 passing through the center O of the bottom part 10 and the joint part 37. In other words, the auxiliary part 50 is located on the opposite side of the joint part 37, with the center O (center) of the bottom part 10 in between. As described above, the auxiliary portion 50 in this embodiment is formed by performing a half-cut on the body portion 30. As will be described later, when forming the half-cut, the processing becomes easier if the target is a position further away from the joint portion 37. Therefore, in this embodiment, the auxiliary portion 50 is formed on the opposite side of the joint portion 37, with the center O in between, so that it is a position further away from the joint portion 37.

[0050] Next, the guide section 60 of this embodiment will be described in detail. Figure 7 is an explanatory diagram of the guide section 60 of this embodiment.

[0051] In this embodiment, the guide section 60 is formed on the outer side 1B. As shown in Figure 7, the guide section 60 guides the user on how to sort the container 1 using the auxiliary section 50, which will be described later. In this embodiment, the guide section 60 is printed on the side 31.

[0052] The guide section 60 of this embodiment includes a guide line 61 indicating the cutting position, a guide text 63 providing explanations, and a guide marker 65 indicating the starting position of the cut. The guide section 60 also indicates the positions of the side half-cut line 51C and the curled half-cut line 53C. The guide line 61 is a band-shaped pattern formed along the vertical direction. In this embodiment, it is formed in a different color from the other colors. The guide line 61 is provided on both sides of the side half-cut line 51C in the direction of intersection with the side half-cut line 51C, which will be described later, of the auxiliary part 50. In other words, in this embodiment, the side half-cut line 51C is sandwiched between the two lines, the guide line 61.

[0053] The guidance text 63 provides instructions for the sorting process using text (characters). In this embodiment, the guidance text 63 may include examples such as "You can break the container from here" and "You can separate the aluminum from the bottom." In this way, the guidance text 63 explains the sorting process verbally using text (characters).

[0054] The guide mark 65 indicates the location of the curl portion half-cut line 53C, which will be described later, of the auxiliary portion 50 formed on the curl portion 33. In this embodiment, the guide mark 65 can be an arrow symbol. The guide mark 65 also indicates the starting position when breaking the container 1 at the curl portion 33.

[0055] When disposing of the container 1 configured as described above, the user follows the guidance of the guide section 60, pinches the curl section auxiliary section 53 of the curl section 33 with their fingers, and tears the curl section 33. At this time, since the curl section auxiliary section 53 is provided with a curl section half-cut line 53C, the user's operation of tearing the curl section 33 is assisted, making it easy for the user to tear the curl section 33.

[0056] Then, the curled portion 33 is broken at the curled portion auxiliary portion 53. After that, the side portion 31 is further torn downwards along the side auxiliary portion 51. At this time, since the side auxiliary portion 51 is provided with a side half-cut line 51C, the user's operation of tearing the side portion 31 is assisted, making it easy for the user to tear the side portion 31.

[0057] Subsequently, the torn portion of the side portion 31 reaches the connection portion 13 (see Figure 2) on the underside of the side portion 31. At this point, the end of the bottom body portion 11 is exposed. The user can then grasp the heating layer 103 (see Figure 3) that makes up the bottom body portion 11 and peel the heating layer 103 from the paper layer 101. Thus, the container 1 of this embodiment is equipped with an auxiliary part 50 that makes it easier to break the side portion 31 toward the heating layer 103. Furthermore, the container 1 of this embodiment makes it easier to separate the heating layer 103 from the paper layer 101, and facilitates the sorting process of the container 1.

[0058] Figure 8 is an explanatory diagram of the materials used in the container 1 of this embodiment.

[0059] The bottom portion 10 and the body portion 30 of the container 1 in this embodiment are formed from a bottom blank material 901 and a body blank material 903, respectively. As shown in Figure 8(A), the bottom blank material 901 corresponds to the bottom portion 10. The bottom blank material 901 is obtained by punching out a shape corresponding to the bottom portion 10 from a plate-shaped base material in which the inner water-resistant layer 105, heat-generating layer 103, paper layer 101, and outer water-resistant layer 107 (see Figure 3) are laminated. In this embodiment, the bottom blank material 901 is formed in a circular plate shape.

[0060] As shown in Figure 8(B), the body blank material 903 corresponds to the body portion 30. The body blank material 903 is obtained by punching out a shape corresponding to the body portion 30 from a plate-shaped base material in which the inner water-resistant layer 303, paper layer 301, and outer water-resistant layer 305 described above are laminated. In this embodiment, the body blank material 903 is formed in an annular fan shape. The body blank material 903 has a first end 9031 on one side in the intersecting direction and a second end 9032 on the other side. The first end 9031 and the second end 9032 are overlapped and engaged to form a joint 37 (see Figure 1).

[0061] Furthermore, the upper end of the body blank material 903 corresponds to the curled portion 33. A curled portion half-cut line 53C is formed at the location of the body blank material 903 corresponding to the curled portion 33. Also, the part of the body blank material 903 below the upper end corresponds to the side portion 31. A side portion half-cut line 51C is formed at the location of the side portion 31 of the body blank material 903.

[0062] Next, we will explain how to manufacture container 1. Figure 9 is a flowchart showing the manufacturing method of the container 1 of this embodiment.

[0063] As shown in Figure 9, a process is carried out to form the body blank material 903 that constitutes the body 30 of the container 1 (S901). Specifically, a shape corresponding to the body 30 of the container 1 is created by punching out a base material which is made up of a paper layer made of paper and a water-resistant layer laminated together. Furthermore, a process is performed to form half-cut lines on the body blank material 903 (S902). At this time, the depth of the side half-cut line 51C corresponding to the curled portion 33 and the depth of the curled portion half-cut line 53C corresponding to the side portion 31 are made different in the body blank material 903.

[0064] Furthermore, a process is carried out to form a bottom blank material 901 that constitutes the bottom 10 of the container 1 (S903). Specifically, a shape corresponding to the bottom 10 of the container 1 is created by punching out a base material which is made by laminating a paper layer made of paper and a heating layer that generates heat by electromagnetic induction on the paper layer.

[0065] Next, the process of forming the body blank material 903 into a cylindrical shape is carried out (S904). Specifically, the first end 9031 and the second end 9032 of the body blank material 903 are engaged using adhesive. At this time, the joint portion 37 in the container 1 is formed.

[0066] Subsequently, a process is carried out to connect the body portion 30, which is formed by shaping the body blank material 903 into a cylinder, with the bottom portion 10, which is formed from the bottom blank material 901 (S905). At this time, the body portion 30 and the bottom portion 10 are connected so that the half-cut line formed on the body portion 30 and the end of the bottom portion 10 face each other. In addition, legs 35 are formed on the container 1. Furthermore, the process of forming a curled portion 33 is carried out by rolling the opposite side of the torso portion 30 from the leg portion 35 (S906).

[0067] Next, I will explain the container used for torture. Figure 10 is an explanatory diagram of container 1 for modified example 1 and modified example 2. Figure 10 is a view of container 1 from above, in the vertical direction.

[0068] In the container 1 of the embodiment described above, the auxiliary portion 50 was formed at one location on the body portion 30. However, the auxiliary portion 50 may be formed at multiple locations on the container 1.

[0069] (Variation 1) As shown in Figure 10(A), the container 1 of the modified example 1 has three auxiliary parts 50. In this case, the first auxiliary part 50 is formed at a position that forms approximately 90 degrees with respect to the joint 37, with the center O of the bottom 10 as the origin. The second auxiliary part 50 is formed at a position that forms approximately 90 degrees with respect to the first auxiliary part 50, with the center O of the bottom 10 as the origin. Furthermore, the third auxiliary part 50 is formed at a position that forms approximately 90 degrees with respect to the second auxiliary part 50, with the center O of the bottom 10 as the origin. The second auxiliary part 50 is positioned on a straight line L2 passing through the joint 37 and the center O. The first auxiliary part 50 and the third auxiliary part 50 are positioned on a straight line L3 passing through the center O, respectively. The three auxiliary parts 50 and the joint 37 are positioned at approximately equal intervals in the circumferential direction of the container 1.

[0070] (Modification 2) As shown in Figure 10(B), the container 1 of the modified example 2 has two auxiliary parts 50. In this case, the first auxiliary part 50 is formed at a position that forms approximately 120 degrees with respect to the joint 37, with the center O of the bottom 10 as the origin. The second auxiliary part 50 is formed at a position that forms approximately 120 degrees with respect to the first auxiliary part 50, with the center O of the bottom 10 as the origin. In this way, the two auxiliary parts 50 and the connecting part 37 are arranged at approximately equal intervals in the circumferential direction of the container 1.

[0071] Figure 11 is an explanatory diagram of container 1 for modified examples 3 and 4.

[0072] (Variation 3) As shown in Figure 11(A), in the modified example 3, the container 1 has an auxiliary part 250 composed of two side auxiliary parts 251 and a curling auxiliary part 253. The pair of side support parts 251 and curl support parts 253 are formed substantially parallel to each other with a predetermined spacing. In the container 1 of the modified example 3, the pair of side support parts 251 and curl support parts 253 are formed along the vertical direction, respectively. The predetermined spacing corresponds to the average finger size of a user. This allows the user to tear the body 30 from the auxiliary part 250 with their fingers, thereby cutting open the side 31 of the body 30 to a certain width.

[0073] (Modification 4) As shown in Figure 11(B), in the modified example 4, the container 1 has an auxiliary part 350 which is composed of two side auxiliary parts 351 and a curling auxiliary part 353. The pair of side support parts 351 and curl support parts 353 are formed with a predetermined distance between them. In the container 1 of the modified example 4, the pair of curl support parts 353 are formed substantially parallel to each other. On the other hand, the pair of side support parts 351 are each formed in a straight line, and the distance between them increases as you move from the top to the bottom. This allows the user to tear the body 30 from the auxiliary part 350 with their fingers, thereby cutting open the body 30 so that it gradually widens towards the bottom.

[0074] Figure 12 is an explanatory diagram of container 1 for modified examples 5 and 6.

[0075] (Variation 5) As shown in Figure 12(A), in the modified example 5, the container 1 has an auxiliary part 450 which is composed of two side auxiliary parts 451 and a curling auxiliary part 453. The pair of side support parts 451 and curl support parts 453 are formed with a predetermined distance between them. In the container 1 of modified example 5, the pair of curl support parts 453 are formed approximately parallel to each other. On the other hand, the pair of side support parts 451 are each formed in a curved shape, and the distance between them widens as they move from the top to the bottom. In addition, the curves of the pair of side support parts 451 are convex on the side facing each other. This allows the user to tear the body 30 from the auxiliary part 450 with their fingers, thereby cutting open the body 30 so that it gradually widens towards the bottom.

[0076] (Experimental variation 6) As shown in Figure 12(B), in the modified example 6, the container 1 has an auxiliary part 550 which is composed of two side auxiliary parts 551 and a curling auxiliary part 553. The pair of side support parts 551 and curl support parts 553 are formed with a predetermined distance between them. In the container 1 of modified example 6, the pair of curl support parts 553 are formed approximately parallel to each other. On the other hand, the pair of side support parts 551 are each formed in a curved shape, and the distance between them widens as they move from the top to the bottom. Furthermore, the pair of side support parts 551 are curved in opposite directions. This allows the user to tear the body 30 from the auxiliary part 550 with their fingers, thereby cutting open the body 30 so that it gradually widens towards the bottom.

[0077] (Example 7) In this embodiment, the container 1 employs a half-cut structure formed on the outside 1B of the body 30 as the auxiliary part 50, but is not limited to this configuration. The auxiliary part 50 may also be formed as a half-cut structure on the inside 1A of the container 1.

[0078] (Variation 8) In the container 1 of this embodiment, the auxiliary part 50 is constructed using a half-cut structure, but the embodiment is not limited to this. The auxiliary part 50 may be, for example, perforations or perforations (holes) arranged in a linear pattern with intermittently penetrating parts that pass through the material.

[0079] (Extreme variation 9) In the container 1 of this embodiment, a half-cut is employed as the curl portion auxiliary portion 53 formed in the curl portion 33, which cuts to the middle of the thickness of the workpiece, but the embodiment is not limited to this. For example, the container 1 may have a notch (for example, a V-shaped notch) in the curl portion 33 that cuts across the curl portion 33 radially as the curl portion auxiliary portion 53.

[0080] (Variation 10) In this embodiment, the container 1 is provided with auxiliary parts 50 on the side portion 31 and the curled portion 33, but the container is not limited to this configuration. For example, the container 1 may have a half-cut line as an auxiliary part 50 on the leg portion 35, or a notch (for example, a V-shaped notch) that cuts the leg portion 35 in the thickness direction.

[0081] Here, container 1 is an example of a paper container. Bottom 10 is an example of a bottom. Side 31 is an example of a side. Curl portion 33 is an example of a curl portion. Joint 37 is an example of an engaging portion. Auxiliary portions 50, 250, 350, 450, 550, side auxiliary portion 51, and curl portion auxiliary portion 53 are examples of auxiliary portions. Side half-cut line 51C is an example of a first half-cut portion or half-cut structure. Curl portion half-cut line 53C is an example of a second half-cut portion or half-cut structure. Guide portion 60 is an example of an indicator portion. Paper layer 101 is an example of a paper layer. Heat-generating layer 103 is an example of a heat-generating layer. Inner water-resistant layer 303 and outer water-resistant layer 305 are examples of water-resistant layers.

[0082] Furthermore, although various embodiments and modifications have been described above, these embodiments and modifications may be combined to form a complete system. Furthermore, this disclosure is not limited in any way to the embodiments described above, and can be implemented in various forms without departing from the gist of this disclosure. [Explanation of Symbols]

[0083] 1...Container, 1A...Inside, 1B...Outside, 10...Bottom, 11...Bottom body, 13...Connecting part, 30...Body, 31...Side, 33...Curled part, 35...Legs, 37...Engaging part, 50...Auxiliary part, 51...Side auxiliary part, 51C...Side half-cut line, 53...Curled part auxiliary part, 53C...Curled part half-cut line, 60...Guide part, 101...Paper layer, 103...Heating layer, 105...Inner water-resistant layer, 107...Outer water-resistant layer, 301...Paper layer, 303...Inner water-resistant layer, 305...Outer water-resistant layer

Claims

1. A container capable of holding contents, It is formed in a plate shape having a paper layer containing paper and a heating layer laminated on the paper layer that generates heat by electromagnetic induction, and the bottom portion that constitutes the bottom surface of the container, It connects to the end of the bottom and to the side portion that constitutes the side of the container, An auxiliary part provided on the side to assist in the operation of tearing the side toward the bottom, A container equipped with [the following features].

2. The upper end of the side portion is provided with a curled portion that is formed in a curl shape, The container according to claim 1, wherein the auxiliary part is provided on the curled portion.

3. The container according to claim 2, wherein the auxiliary portion is formed linearly from the top to the bottom of the container.

4. The container according to claim 2, wherein the auxiliary portion is a half-cut structure in which the groove does not penetrate in the thickness direction of the member.

5. The container according to claim 4, wherein the half-cut structure is formed on the outside of the side portion.

6. The side portion has a water-resistant layer on the inside and outside of the side portion, respectively, which suppresses the penetration of moisture. The container according to claim 5, wherein the half-cut structure is formed by cutting a portion of the outer water-resistant layer.

7. The aforementioned half-cut structure is formed on the side portion and the curl portion, The container according to claim 5, wherein the depth of the groove of the half-cut structure formed in the curled portion is deeper than the depth of the groove of the half-cut structure formed in the side portion.

8. The container according to claim 1, wherein the peel strength between the heating layer and the paper layer at the bottom is less than the peel strength between the bottom and the side.

9. The side portion is formed by a member surrounding the bottom portion and has a joint where the ends of the member are joined together. The container according to claim 1, wherein the auxiliary portion is positioned on the opposite side of the joint portion, with the central portion of the bottom portion in between, when viewed from a direction along the vertical direction of the container.

10. A container capable of holding contents, It is formed in a circular plate shape having a paper layer containing paper and a heating layer laminated on the paper layer that generates heat by electromagnetic induction, and has a bottom portion that constitutes the bottom surface of the container, It is formed in a cylindrical shape and connected to the outer circumference of the bottom, and the side portion that constitutes the side of the container, A curled portion is provided at the upper end of the aforementioned side portion and is formed in a curled shape, A first half-cut portion is provided on the outer side of the side portion and is formed along the vertical direction of the side portion, A second half-cut portion is provided in the curl portion at a position along the first half-cut portion, An indicator unit that points to the position of the first half-cut portion and the second half-cut portion, A container equipped with [the following features].

11. A process of forming the side portion that constitutes the side of the container, A step of forming a half-cut structure on the side portion, A step of forming the bottom of the container by laminating a heating layer that generates heat by electromagnetic induction onto a paper layer made of paper, A step of connecting the side portion and the bottom portion such that the half-cut structure of the side portion and the end of the bottom portion face each other, A method for manufacturing a container equipped with the following features.

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