JP5372693B2 - Container and container manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container formed from paper, having a bowl or big bowl shape as a whole, and having a curved structure in which its bottom is continuous with a body without using a flat bottom plate. <P>SOLUTION: A portion defining an opening 24 at the top of the upper half 11 of an inverted truncated cone, formed by rolling a fanlike base paper, is curled outside to form a curl 25. Also, its lower portion is turned up outside to form a turned-up fold 33. Additionally, a circular base paper 38 is draw formed to form a lower half 12 such that the bottom 15 is continuously curved integrally with the lower end of the lower body 14. Then, the lower end of the upper body 13 of the upper half 11 is fitted and joined to the internal circumferential face of the lower body 14 of the lower half 12. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a container and a method for manufacturing the container, and more particularly to a container mainly made of paper and a method for manufacturing such a container.

  Conventionally, containers formed and assembled from paper have been widely used. That is, as shown in FIGS. 1 and 2, a paper container having a body having an inverted truncated cone shape is widely used. Here, the body portion 1 is obtained by winding a fan-shaped base paper and joining both ends, and a curled portion 3 wound outward is formed at the peripheral portion of the upper opening. The lower end portion of the body 1 is closed by the bottom plate 4. As shown in FIG. 2, the bottom plate 4 is integrally provided with a bent portion 5 bent downward as shown in FIG. 2, and the bent portion 5 is sandwiched between the lower end of the body portion 1 and the folded portion 6. This closes the bottom opening and constitutes a bottomed container. Such a container is known, for example, from Japanese Patent Application Laid-Open No. 2001-97354.

  This type of conventional paper container is limited to the shape of an inverted frustoconical shape because the body 1 is manufactured by winding a fan-shaped base paper, and can be shaped like a bowl shape or a bowl shape. However, there is a limitation in design or shape. Further, since the bottom plate 4 connects the bent portion 5 to the lower end of the body portion 1, the bottom plate 4 is constituted by the bottom plate 4 having a flat plate shape.

  Such containers can be sold with cup noodles or instant noodles, such as instant noodles, in them. However, there is a defect that lacks the freshness of the design due to the limitation of the shape. It is also unsuitable for use as a container for processed foods for take-out.

JP 2001-97354 A

  An object of the present invention is to provide a container made of paper and having a lower half in the shape of a ball so that it can take the shape of a bowl or bowl as a whole.

  Another object of the present invention is to provide a paper container that eliminates the restriction of the inverted frustoconical design or shape.

  Still another object of the present invention is to provide a paper container in which the bottom part is continuous with the lower part of the body part by a curved surface.

  Still another object of the present invention is to provide a paper container having a large shape retaining property as a container and having rigidity.

  Still another object of the present invention is to provide a paper container suitable for use as a container for instant noodles such as instant noodles.

  Yet another object of the present invention is to provide a paper container suitable for use as a take-out processed food container.

  The above-described problems and other problems of the present invention will be made clear by the technical idea of the present invention described below and the embodiments thereof.

The main invention of the present application is a container mainly made of paper, wherein an upper part and a lower part are opened, an inverted frustum shape or a cylindrical shape, an upper half whose peripheral surface constitutes an upper body part, and a bottom part The lower half of the upper half of the upper half and the lower barrel of the lower half of the lower half. And the lower end of the upper body part of the upper half body is fitted to the inner or outer peripheral part of the upper body part of the lower body part of the lower half body, and The upper half and the lower half are made of paper having a resin layer on the inner surface or the inner surface and the outer surface, and the upper half is fitted to the upper half and the lower half. The present invention relates to a container characterized in that a half resin layer and the lower half resin layer are welded in contact with each other .

Here, a peripheral edge portion of the upper opening of the upper half body may be wound outward to form a curled portion or a flange at the upper end of the upper body portion. In addition, an end surface of one of the lower end of the upper body of the upper half and the upper end of the lower body of the lower half is processed, and the end surface of the end located inside the container is processed. The end face of the paper may not be exposed inside the container. Further, the lower half of the upper half of the upper half and the upper end of the lower half of the lower half are folded outward or inward, and the folded portion is folded under the lower half. You may make it fit and join the upper end of a side trunk | drum, or the lower end of the upper trunk | drum of the said upper half body. Further, the upper end of the lower body part of the lower half is folded inward or outward, the lower end of the upper body part of the upper half is folded back or inward, and the upper body part of the upper half is folded back. The lower end surface and the folded upper end surface of the lower half may be faced upside down.

The main invention related to the method for manufacturing a container is a method for manufacturing a container mainly made of paper.
The upper part and the lower part are open, respectively, in the shape of an inverted frustum or cylinder, the peripheral surface is made by pressing the upper half of the upper body and flat paper, and the bottom is integrated continuously. A lower half of which the peripheral surface constitutes the lower body, and a lower end of the upper body of the upper half and an upper end of the lower body of the lower half of each other Mated and joined,
Moreover, the upper half and the lower half are made of paper having a resin layer provided on the inner surface or the inner surface and the outer surface, and in the fitting portion between the upper half and the lower half The present invention relates to a method of manufacturing a container in which the upper half resin layer and the lower half resin layer are welded in contact with each other .
Here, the end surface of the end located at the inner side of the container, which is one of the lower end of the upper barrel of the upper half and the upper end of the lower barrel of the lower half, is processed. Thus, the end face of the paper may not be exposed inside the container.

Another invention relating to the manufacturing method is a method for manufacturing a container mainly made of paper,
The upper and lower parts are each open, have an inverted frustum shape or a cylindrical shape, the peripheral surface is formed integrally with the upper half that forms the upper body part, and the bottom part is formed integrally. The peripheral surface is the lower body part. The lower half of the upper half, and the lower end of the upper half of the upper half and the upper end of the lower half of the lower half are fitted together and joined together,
In addition, the upper half and the lower half are made of paper having a resin layer provided on the inner surface or the inner surface and the outer surface, and pressurizing the fitted portion while heating, the upper half In addition , the present invention relates to a method of manufacturing a container, wherein the containers are welded to each other by the resin layer provided on the paper constituting the lower half.

  The main invention of the present application is a container mainly made of paper, wherein an upper part and a lower part are opened, an inverted frustum shape or a cylindrical shape, an upper half whose peripheral surface constitutes an upper body part, and a bottom part The lower half of the upper half of the upper half and the upper end of the lower half of the lower half of the upper half. Are fitted and joined to each other.

  Therefore, according to such a container, the upper body part of the upper half body and the lower body part of the lower half body are connected to each other and are continuously connected to the bottom part of the lower half body. Since the bottom is formed, it becomes possible to provide a container whose main material is paper having a continuous bottom without using a bottom plate made of another member. For example, the overall shape is a bowl shape, a bowl shape, or the like. It becomes possible to do. In addition, since the upper half and the lower half are joined to each other by fitting the lower end of the upper barrel and the upper end of the lower barrel together, the thickness of the trunk is increased at the fitting joint. Thus, shape retention is given to the container, and the container has rigidity.

It is an external appearance perspective view of the conventional paper container. It is the front view which fractured | ruptured a part of the container. It is an expansion | deployment top view of the base paper which assembles the upper half body of the container which concerns on one embodiment of this invention. It is the front view which fractured | ruptured a part of the state (A) in which the base paper was wound, and the state (B) in which the curl part was formed. It is a longitudinal cross-sectional view which shows the operation | movement which forms a folding | turning part in the lower end of an upper half body. It is the front view which fractured | ruptured a part which shows the state which forms a curved part in the lower end of an upper half body (A), and crushes this curved part, and forms the folding | returning part 33. It is a top view of the circular base paper for assembling a lower half body. It is a longitudinal cross-sectional view which shows the state which shape | molds a lower half body using circular base paper. It is the front view which fractured | ruptured a part of the shape | molded lower half body. It is the front view which fractured | ruptured a part which shows the coupling | bonding operation | movement of an upper half and a lower half. It is the front view which fractured | ruptured a part of the state which fitted and joined the upper half and the lower half. FIG. The principal part cross-sectional view which shows the state (A) before welding the fitting junction part of the upper side trunk | drum of an upper half body, and the lower trunk | drum of a lower half body, and the welded state (B). is there. It is a principal part expanded sectional view which shows the state of the welding in the fitting junction part of the lower end of the upper side trunk | drum of the upper half body which laminated the polymer film on the inner surface, and the upper end of a lower side trunk | drum. It is a principal part expanded sectional view which shows the welding state in the fitting junction part of the upper end of the upper side trunk | drum of the upper side half body which laminated the polymer film on inner and outer surfaces, and the upper end of the lower side half part of a lower half. It is a longitudinal cross-sectional view which shows the shape of the container which concerns on a modification. It is a longitudinal cross-sectional view which shows the shaping | molding apparatus (A) for shape | molding a lower half body by ironing, and the state (B) of shaping | molding by this shaping | molding apparatus. It is a principal part expanded sectional view which shows the state of ironing by the same apparatus. It is the front view which fractured | ruptured a part of lower half body shape | molded by the ironing apparatus. It is a top view of the elliptical container of a modification. It is an external appearance perspective view of the container. It is a top view of the square container of another modification. It is an external appearance perspective view of the container.

  The present invention will be described below with reference to an embodiment shown in the drawings. As shown in FIGS. 10 to 12, the container of the present embodiment includes an upper half 11 and a lower half 12 both made of paper. The outer peripheral portion of the upper half body 11 constitutes the upper body portion 13, and the outer peripheral portion of the lower half body 12 constitutes the lower body portion 14. The lower body portion 14 is continuously closed by the bottom portion 15. A lower protrusion 16 is formed on the bottom 15 of the lower half 12 so as to protrude in a ring shape when viewed from the bottom.

  FIG. 3 shows the base paper 20 constituting the upper half 11 expanded. As the base paper 20, a high-quality paperboard having a predetermined thickness is used. The thickness of the base paper 20 is arbitrarily selected depending on the size of the container used, the contents to be filled, and the like. And the polyethylene film 21 is joined to the inner surface of the base paper 20 in order to provide water resistance (refer FIG. 14A-F). As for another base paper 20, for example, a polyethylene film 21 bonded to the inner surface and a polyethylene film 22 bonded to the outer surface is used (see FIGS. 15A to 15F). Further, instead of bonding a polymer film such as a polyethylene film, a water-resistant resin layer may be formed by applying a molten resin to the inner surface or the inner and outer surfaces of the base paper 20.

  The base paper 20 shown in FIG. 3 is wound in a circular shape, and both ends thereof are overlapped with each other at the joint 23 as shown in FIG. The curled portion 25 is formed by winding the portion of the upper opening 24 of the upper half 11 having the inverted truncated cone shape outwardly as shown in FIG. 4B. The curl portion 25 is formed by the same method as that for forming a curl portion in a paper container that has been widely used conventionally. The curled portion 25 may be further crushed into a flat flange.

  Next, a folded portion 33 as shown in FIG. 6 is formed at the lower end portion of the upper half 11 using a mold 28 as shown in FIG. The center portion of the mold 28 is a protrusion 29, and a ring-shaped recess 30 is formed on the outer periphery of the protrusion 29, and a portion on the outer periphery of the protrusion 29 faces the ring-shaped recess 30. An inclined surface 31 is formed. A portion on the terminal end side of the inclined surface 31 and a lower end side of the ring-shaped recess 30 is curved, and a curved portion 32 is formed by using the curved portion to curve a lower end portion of the upper half body 11. (See FIG. 6A), and further, the folded portion 33 folded back to the outside is formed by crushing the curved portion 32 (see FIG. 6B).

  The reason why the folded portion 33 is formed at the lower end portion of the upper body portion 13 of the upper half body 11 is that the lower end portion of the upper body portion 13 of the upper half body 11 that is not covered by the polyethylene film 21 is the contents as will be described later. When the base paper 20 sucks moisture into the container, the container is deformed, so that the lower end portion of the upper body 13 does not come into contact with the contents or moisture. Another object is to prevent paper dust from being generated from the lower end of the upper body 13 and mixing into the contents.

  Next, the base paper 38 for assembling the lower half 12 will be described. Here, a circular base paper 38 as shown in FIG. 7 is used. The circular base paper 38 is made of high-quality paper in the same manner as the upper half 11, and long ridges 39 and short ridges 40 that extend radially are alternately formed on the outer periphery of the base paper 38 in the circumferential direction. This enables drawing. The ridges 39 and 40 may be different types of ridges having different lengths, and three or more types of ridges may be alternately and sequentially formed. Further, as shown in FIG. 14A, such a circular base paper 38 has a polyethylene film 41 bonded to at least the inner surface thereof. Moreover, it is good also as a structure which joined the polyethylene film 41 to the inner surface, and joined the polyethylene film 42 to the outer surface (refer FIG. 15A).

  Such a circular base paper 38 is drawn by a drawing mold 43 as shown in FIG. The lower mold 43 includes a recess 44 opened on the upper surface thereof. The upper mold 45 is arranged so as to be movable up and down so as to face the lower mold 43 so as to align with the recess 44.

  The circular base paper 38 is disposed on the upper surface of the lower mold 43 so as to close the concave portion 44. Then, in this state, the upper die 45 is gently lowered to draw the circular base paper 38 so as to follow the inner peripheral surface of the recess 44 of the lower die 43, thereby forming the lower half 12. Is done. As shown in FIG. 9, the lower half 12 has a lower portion formed from a bottom portion 15 and is continuous with the lower trunk portion 14. The bottom 15 is formed with a lower protrusion 16 that protrudes downward.

  As shown in FIG. 10, the upper half 11 formed by the base paper 20 and the lower half 12 formed by the base paper 38 are fitted with the lower end of the upper body 13 and the upper end of the lower body 14 fitted together. As a result, the upper half 11 and the lower half 12 are joined together. That is, the portion of the folded portion 33 on the lower end side of the upper body portion 13 of the upper half body 11 is fitted to the inner peripheral surface of the lower body portion 14 of the lower half body 12, thereby coupling the two to each other. And assembled as a bowl-shaped or bowl-shaped container. In addition, you may insert and fit the outer peripheral part of the upper end part of the lower trunk | drum 14 of the lower half body 12 inside the lower end part of the upper trunk | drum 13 of the upper half body 11 (refer FIG. 14B and FIG. 15B). ).

  Here, a polyethylene film 21 is bonded to the inner surface of the upper half body 11, and a polyethylene film 41 is bonded to the inner surface of the lower half body 12. Therefore, as shown in FIG. 14A, these polyethylene films 21 and 41 are superposed on each other on the outer peripheral surface of the folded portion 33 at the lower end of the upper body portion 13 (see FIG. 14A). Therefore, the upper half 11 and the lower half 12 are pressed while being heated by the heating plate 48 as shown in FIG. 13, thereby removing the folded portion 33 on the lower end side of the upper body 13 of the upper half 11. The polyethylene film 21 on the surface and the polyethylene film 41 on the inner peripheral surface of the lower barrel 14 of the lower half 12 are welded to each other, whereby the upper half 11 and the lower half 12 are joined to the upper barrel. 13 and the lower body part 14 are welded to each other.

  In addition, when the polyethylene film 22 is further joined to the outer surface of the upper half body 11 and the polyethylene film 42 is further joined to the outer surface of the lower half body 12, the joining state shown in FIG. In addition to welding on the folded portion 33, the polyethylene film 22 on the outer surface of the upper barrel 13 of the upper half 11 and the polyethylene on the inner surface of the lower barrel 14 of the lower half 12 above the folded portion 33. The film 41 is further joined to achieve a stronger welded state.

  In addition, about the joining structure by fitting with the lower end of the upper trunk | drum 13 of the upper half body 11, and the upper end of the lower trunk | drum 14 of the lower half body 12, it is not necessarily limited to a structure as shown to FIG. 14A or FIG. 15A. In addition, various other joining structures can be employed. When both the base paper 20 of the upper half 11 and the base paper 38 of the lower half 12 have the polyethylene films 21 and 41 bonded to only the inner surface, the upper side of the upper half 11 is shown in FIG. 14B. The lower end of the body part 13 may be folded inward, and the outer peripheral part of the lower body part 14 of the lower half body 12 may be fitted to the inner peripheral surface thereof. In this case, it is necessary to perform end face processing of the upper end portion of the lower body portion 14 of the lower half body 12.

  14C, the upper end portion of the lower body portion 14 of the lower half body 12 is folded outward to form a folded portion 53, and the lower end portion of the upper body portion 13 of the upper half body 11 is formed on the outer peripheral side thereof. May be joined together.

  Alternatively, as shown in FIG. 14D, the upper end of the lower body portion 14 of the lower half body 12 is folded inward, and the lower end portion of the upper body portion 13 of the upper half body 11 is fitted to the inner peripheral side thereof. May be joined. In this case, it is necessary to perform the end face processing of the lower end portion of the upper body portion 13 of the upper half body 11 in advance.

  Further, as shown in FIG. 14E, the lower end of the upper body portion 13 of the upper half body 11 is folded outward to form a folded portion 33, and the upper end portion of the lower body portion 14 of the lower half body 12 is folded back to the inside. A folded portion 53 is formed, and the upper body portion 13 is fitted and joined so that the upper body portion 13 is on the inner circumferential side and the lower body portion 14 is on the outer circumferential side, and the folded portion 33 of the upper body portion 13 and the lower body portion 14 are joined. The folded portion 53 at the upper end of each may be abutted upside down.

  14F, the lower end portion of the upper body portion 13 of the upper half body 11 is folded inward to form a folded portion 33, and the upper end of the lower body portion 14 of the lower half body 12 is folded outward. A folded portion 53 is formed. And the outer peripheral part of the lower trunk | drum 14 is fitted to the inner peripheral side of the upper trunk | drum 13, and the folding | returning part 33 of the lower end of the upper trunk | drum 13 and the folding | returning part 53 of the upper end of the lower trunk | drum 14 are mutually turned up and down. You may make it join from the opposite direction.

  14G, the folded portion 33 at the lower end of the upper trunk portion 13 is inserted inside the folded portion 53 at the upper end of the lower barrel portion 14, and the folded portion 53 at the upper end of the lower barrel portion 14 is inserted into the upper trunk portion. You may insert in the inner side of the folding | returning part 33 of the lower end of the part 13. FIG. That is, the folded portions 33 and 53 are combined so as to cross each other.

  14H, when the folded portion 33 at the lower end of the upper trunk portion 13 and the folded portion 53 at the upper end of the lower barrel portion 14 are crossed, the upper trunk portion 13 is outside and the lower trunk portion 14 is The folded portions 33 and 53 may be crossed so as to be inside.

  Further, the base paper 20 forming the upper half 11 is a base paper in which the inner polyethylene film 21 and the outer polyethylene film 22 are joined, and the polyethylene film 41 is provided inside the base paper 38 constituting the lower half 12. When the polyethylene film 42 is bonded to the outside, various fitting structures as shown in FIG. 15 are possible. That is, as shown in FIG. 15A, the lower end of the upper body portion 13 of the upper half body 11 is folded outward to form the folded portion 33, and is fitted to the inner peripheral portion of the lower body portion 14 of the lower half body 12. Can be joined together.

  Further, as shown in FIG. 15B, the lower end portion of the upper body portion 13 of the upper half body 11 may be folded inward to form the folded portion 33 and may be fitted to the outer peripheral portion of the lower body portion 14. In this case, it is necessary to perform end face processing of the upper end portion of the lower body portion 14 of the lower half body 12.

  Further, as shown in FIG. 15C, the upper end of the lower body portion 14 of the lower half body 12 is folded outward to form a folded portion 53 and is fitted to the inner peripheral surface of the lower end of the upper body portion 13 of the upper half body 11. May be combined.

  Further, as shown in FIG. 15D, the upper end of the lower body portion 14 of the lower half body 12 is folded inward to form a folded portion 53 and is fitted to the outer peripheral surface of the lower end of the upper body portion 13 of the upper half body 11. May be joined. In this case, it is necessary to perform end face processing of the lower end portion of the upper body portion 13 of the upper half body 11 in advance.

  15E, the lower end portion of the upper body portion 13 of the upper half body 11 is folded outward to form a folded portion 33, and the upper end of the lower body portion 14 of the lower half body 12 is folded inward. A folded portion 53 is formed. Then, the upper body 13 may be fitted so that the lower body 14 is on the inner peripheral side and the lower body 14 may be on the outer peripheral side, and the folded portions 33 and 53 may be joined in the opposite direction.

  Further, as shown in FIG. 15F, the lower end portion of the upper body portion 13 of the upper half body 11 is folded inward to form a folded portion 33, while the upper end of the lower body portion 14 of the lower half body 12 is The folded portion 53 is formed by folding outward. It is also possible to join the upper body portion 13 to the outer peripheral side and the lower body portion 14 to the inner peripheral side so that the folded portions 33 and 53 abut each other in opposite directions.

  Further, as shown in FIG. 15G, the folded portion 33 at the lower end of the upper body portion 13 and the folded portion 53 at the upper end of the lower body portion 14 are crossed so as to sandwich each other, and the upper body portion 13 is You may make it distribute | arrange to the inner peripheral side of the side trunk | drum 14.

  15H, the folded portion 33 at the lower end of the upper trunk portion 13 and the folded portion 53 at the upper end of the lower barrel portion 14 are crossed with each other, and the lower trunk portion 14 is connected to the inner periphery of the upper trunk portion 13. You may combine so that it may be located in the side.

  FIG. 16 shows the shape of a modification of the above embodiment. FIG. 16A shows a container having a deeper dimension by increasing the height dimension of the upper body part 13 of the upper half body 11 and the lower body part 14 of the lower half body 12 respectively.

  FIG. 16B shows a stepped structure by forming a stepped portion 56 in the middle of the lower body portion 14 of the lower half 12.

  FIG. 16C is a body portion on the outer peripheral side of the lower body portion 14 of the lower half body 12 and is rounded at the lower portion, thereby making the corner portion on the bottom side more rounded.

  In FIG. 16D, the inclination angle of the upper body part 13 of the upper half body 11 and the lower body part 14 of the lower half body 12 is set to about 35 °, respectively, thereby forming an intermediate shape between the bowl shape and the dish shape.

  Next, a forming die for forming a modified example for forming the lower half 12 will be described with reference to FIG. In this modification, the lower half 12 is formed by ironing. The ironing apparatus uses a die 60 having a circular through-hole at the center. A bottom molding die 61 is arranged in the through hole portion of the die 60, and the bottom is molded on the top surface of the bottom molding die 61. A punch 62 is disposed on the bottom mold 61. The punch 62 and the bottom mold 61 are movable up and down with respect to the die 60. Further, a flange presser 63 is disposed on the upper portion of the die 60 so as to be positioned on the outer peripheral side of the punch 62. A spacer 64 is attached to a step portion on the outer peripheral side of the die 60 in order to keep the dimension between the flange retainer 63 and the upper surface of the die 60 at an appropriate value according to the thickness of the base paper.

  As shown in FIG. 17A, a circular base paper 38 is placed on the upper surface of the bottom mold 61. Then, the outer peripheral portion of the base paper 38 is pressed against the die 60 by the flange presser 63. In this state, the punch 62 and the bottom molding die 61 are gently lowered while the central portion of the base paper 38 is pressed against the bottom molding die 61 by the punch 62. At this time, as shown in FIG. 17B and FIG. 18, the base paper 38 is drawn along the inner peripheral surface of the center hole of the die 60 while squeezing the shoulder portion of the edge of the center hole of the die 60 (FIG. 18). reference).

  According to such ironing, since it is ironed at the corner shoulder portion of the die 60 and is formed by the inner peripheral surface of the die 60 and the inner peripheral surface of the bottom mold 61, as shown in FIG. The lower half body 12 in which the outer peripheral surface is vertical and the lower body portion 14 is vertical is obtained. Such a lower half 12 may be joined to the upper half 11 as it is, but it is also possible to perform secondary processing so that the angle of the lower body 14 of the lower half 12 is inclined. is there. In particular, since the lower half 12 is formed by squeezing a base paper having a larger area on the upper side and on the opening side, secondary processing can be performed more easily.

  Next, another embodiment will be described with reference to FIGS. In the above embodiment, the upper half body 11 and the lower half body 12 have a circular shape as viewed from above. However, as shown in FIGS. 20 and 21, the upper half body 11 and the lower half body 12 are formed. And oval or oval, respectively, and thereby an oval or oval paper container deformed laterally.

  Further, as shown in FIGS. 22 and 23, the upper half body 11 and the lower half body 12 may be rectangular when viewed from above, and the corner portions may be curved. This makes it possible to obtain a paper container that is generally quadrangular and has a curved corner.

  Although the present invention has been described above with reference to the illustrated embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea of the present invention. For example, in the embodiment described above, the upper half 11 has an inverted truncated cone shape, but the upper half 11 may be cylindrical. The above embodiment is suitable for use as a container for instant noodles and processed foods for take-out, but the present invention can be applied to paper containers that can be widely used for various other purposes. . Various changes can be made to the dimensions, sizes, shapes, and the like according to the intended use.

  The present invention can be used for a paper container that can be used as a container for supplying instant noodles such as instant noodles or a container for storing processed food for take-out.

DESCRIPTION OF SYMBOLS 1 Body part 2 Upper opening 3 Curl part 4 Bottom plate 5 Bending part 6 Folding part 11 Upper half body 12 Lower half body 13 Upper trunk part 14 Lower trunk part 15 Bottom part 16 Lower side protrusion 20 Base paper 21 Polyethylene film (inside )
22 Polyethylene film (outside)
23 joint 24 upper opening 25 curl 28 mold 29 projection 30 ring-shaped recess 31 inclined surface 32 curved portion 33 folded portion 38 circular base paper 39 ridge (long)
40 ridges (short)
41 Polyethylene film (inside)
42 Polyethylene film (outside)
43 Lower mold 44 Recess 45 Upper mold 48 Heating plate 53 Folded part 56 Step part 60 Die 61 Bottom mold 62 Punch 63 Flange presser 64 Spacer

Claims (8)

In containers made mainly of paper,
The upper half and the lower part are each open, have an inverted frustum shape or a cylindrical shape, and the upper half of which the peripheral surface constitutes the upper body,
A lower half of which the bottom is continuously formed integrally and the peripheral surface constitutes the lower body;
And the lower end of the upper body of the upper half and the upper end of the lower body of the lower half are fitted and joined to each other ,
The lower end of the upper body of the upper half is fitted to the inner periphery or the outer periphery of the lower body of the lower half, and the upper half and the lower half are Made of paper having a resin layer on the inner surface or inner surface and outer surface, the upper half resin layer and the lower half half A container which is welded in a state where the resin layers are in contact with each other .   The container according to claim 1, wherein a peripheral edge portion of an upper opening of the upper half body is wound outward to form a curled portion or a flange at an upper end of the upper body portion. One of the lower end of the upper barrel of the upper half and the upper end of the lower barrel of the lower half is processed on the end surface of the end located inside the container, The container according to claim 1, wherein the end face is not exposed to the inside of the container. One of the lower end of the upper body of the upper half and the upper end of the lower body of the lower half is folded outward or inward, and the lower part of the lower half is folded to the folded portion. The container according to claim 1, wherein the upper end of the body part or the lower end of the upper body part of the upper half body is fitted and joined. The upper end of the lower body part of the lower half is folded inward or outward, the lower end of the upper body part of the upper half is folded outward or inward, and the upper body part of the upper half is folded The container according to claim 1 , wherein the lower end surface and the folded upper end surface of the lower half face each other in an upside down direction. In the manufacturing method of a container mainly made of paper,
The upper part and the lower part are open, respectively, in the shape of an inverted frustum or cylinder, the peripheral surface is made by pressing the upper half of the upper body and flat paper, and the bottom is integrated continuously. A lower half of which the peripheral surface constitutes the lower body, and a lower end of the upper body of the upper half and an upper end of the lower body of the lower half of each other Mated and joined,
Moreover, the upper half and the lower half are made of paper having a resin layer provided on the inner surface or the inner surface and the outer surface, and in the fitting portion between the upper half and the lower half A method of manufacturing a container in which the upper half resin layer and the lower half resin layer are welded in contact with each other . Paper is obtained by processing the end surface of one of the lower end of the upper barrel of the upper half and the upper end of the lower barrel of the lower half and located inside the container. The container manufacturing method according to claim 6, wherein an end face of the container is not exposed to the inside of the container. In the manufacturing method of a container mainly made of paper,
The upper and lower parts are each open, have an inverted frustum shape or a cylindrical shape, the peripheral surface is formed integrally with the upper half that forms the upper body part, and the bottom part is formed integrally. The peripheral surface is the lower body part. The lower half of the upper half, and the lower end of the upper half of the upper half and the upper end of the lower half of the lower half are fitted together and joined together,
In addition, the upper half and the lower half are made of paper having a resin layer provided on the inner surface or the inner surface and the outer surface, and pressurizing the fitted portion while heating, the upper half And / or a method for producing a container, wherein the resin layers are welded to each other by the resin layer provided on the paper constituting the lower half.

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