JP4706822B2 - Threaded metal cap and threaded metal cap sealing container - Google Patents

Description

  The present invention relates to a threaded metal cap and a threaded metal cap sealing container that can be filled at high speed and can be resealed (resealed after opening).

  Conventionally, metal cans are frequently used as a distribution container filled with beverages, and in particular, three-piece cans (three-piece cans) and two-piece cans (two-piece cans) have been used for many years. The three-piece can is a can body member with a seam formed by forming a rectangular plate into a cylinder and joined by welding, nylon bonding, soldering, etc., and three members with a canopy and a bottom lid fixed to the openings at both ends, respectively. It is composed of On the other hand, a two-piece can is composed of two members with a can lid fixed to a cup-shaped one in which a can body and a can bottom formed by pressing a circular material plate are integrated. It is also called a seamless can.

  The reason why such a product in which a columnar can is filled with food, in particular, beverages, has been mass-produced is that there is a double winding method in which a canopy and a bottom lid are fixed to a can body. In this double winding method, a flange with a width of several millimeters provided at the opening of the can body is curled on the outer circumference and covered with a lid (top, bottom) coated with a sealing agent, and curled while rotating the can at high speed. The outer periphery of the part is pressed, and it is inserted and sealed together with the flange of the can from below.

  This double wrapping method has the feature that the contents can be reliably sealed at high speed, and it is applied to most food cans including canned beverages that are mass-produced. Many canned producers have the equipment of this method. ing. However, since the lid fixed by the double winding method cannot be easily opened with bare hands, a tool such as a so-called can opener is required. Therefore, an easy open end that can be opened in a circle by providing a circular and linear easily breakable portion (score) with a thin plate thickness on the lid surface has been developed. Currently, most beverage cans are covered with this lid. Is used. However, the feeling of drinking with a mouth directly on a small circular opening provided on the canopy surface was significantly inferior to that of a cup container or the like. And once opened, there is a problem that it cannot be resealed.

  In recent years, as consumption by elderly people, infants, and women who cannot drink at a time after opening a container beverage has increased, and consumption in the outdoors and in vehicles has increased, it is the same for consumers as bottled beverages and PET bottled beverages. In addition, there has been a growing demand for metal cans that have (1) a resealable function, and (2) that the shape of the drinking mouth is small in diameter and fits well into the mouth, so that only a so-called trumpet can be obtained. In response to such a demand, a metal can that can be resealed by attaching a screw cap to the tip opening and providing a small-diameter cylindrical neck and neck by projecting the center of the canopy upwards ( Patent Document 1: Japanese Patent Publication No. 10-509095).

Furthermore, the inventors have already filed an application in Japanese Patent Application No. 2004-186986 (patent document 2) for developing a resealable opening structure using a metal cap with a screw. In the opening structure of the container described in Patent Document 2, the cap part and the pouring part are formed continuously and integrally from the cylinder which becomes the mouth and neck part of the container, and the guarantee of sealing performance after filling the contents is complete, It is excellent in productivity during container production and durability during transportation.
Japanese National Patent Publication No. 10-509095 Japanese Patent Application No. 2004-186986

  As described above, beverage containers have been greatly improved according to demands such as easy opening of cans and ease of drinking by developing easy-open lids and bottle-shaped cans. However, in spite of this improvement in convenience, in the mass-produced can beverages, the speed at which the cap is screwed into the bottle-shaped drinking mouth is fastened to the can body of the conventional cylindrical can. The problem that it is extremely inferior to the speed of attachment by winding has been a major bottleneck in improving productivity. In recent years, as the demand for containers with metal caps has increased, the high-speed filling has been a major issue for cost reduction in beverage provision.

In addition, if the existing equipment that double-clamps many canopies can be used as it is for filling the contents of containers with caps, it will not be necessary to introduce new cap sealing equipment, which will greatly contribute to cost reductions in providing beverages in containers. To do.
The present invention has been made in view of the background as described above, and provides a threaded metal cap and a threaded metal cap sealing container that can achieve high-speed filling of the contents and can use the existing double winding equipment as it is. This is the issue.

According to a first aspect of the present invention, there is provided a threaded metal cap for sealing a container having a cap curled portion, a threaded cylinder provided with an opening on the upper side, and sealing the opening. A metal cap with a screw consisting of a canopy that also seals the cap curl of the container,
In the canopy, a sealing agent is provided on the inner peripheral ring portion and the inner peripheral ring portion surface to ensure the sealing performance with the upper end of the base curl portion ,
Sealing the canopy by double winding, and making the outer diameter (D) of the double winding portion of the canopy smaller than the outer diameter (d) of the threaded metal cap,
The outer wall of the cap is brought into close contact with the container curl portion so that the content liquid does not enter the clearance (21) between the container curl portion and the metal cap outer wall .
The screwed metal cap sealing container according to claim 2 of the present invention is configured such that when the spout provided with the base curl portion is sealed with the screwed metal cap, the screwed metal cap is provided with an opening on the upper side.
In a metal cap sealing container with a screw that seals the opening with a canopy,
The canopy is provided with a sealing agent on the inner peripheral ring portion surface and the inner peripheral ring portion for ensuring sealing performance with the upper end of the base curl portion ,
The canopy is sealed by double winding, the outer diameter (D) of the double winding portion of the canopy is made smaller than the outer diameter (d) of the threaded metal cap, and the outer wall of the cap is placed on the container curl portion. The content liquid is prevented from entering the clearance (21) between the container curl portion and the outer wall of the metal cap .

According to the present invention, an opening is provided above the threaded metal cap, and the contents can be filled from the opening and sealed by the canopy, so that the filling speed can be greatly improved. Further, since the conventional sealing equipment can be used as it is, the contents can be filled into the screwed metal cap sealing container without investing in new equipment.
In addition, as the structure of the neck of the can mouth, since it is a mouth and neck part consisting of a spout and an outer wall processed continuously from the opening cylinder, the guarantee of the sealing after filling the contents is more complete, It is excellent in productivity during container production and durability during transportation.
Furthermore, if a metal cap with a screw is integrated with a separately formed container main body by double winding or the like, it can be applied to various types of can bodies (size, can body forming method).
In addition, since the canopy is sealed by double winding in the opening provided above the screwed metal cap, the boundary between the inside of the can and the outside air after filling the contents can achieve high sealing performance for many years. .
And since the outer diameter of the double winding part of the canopy sealed to the metal cap with a screw is smaller than the outer diameter of the metal cap with the screw, the double winding part receives the external impact during container transportation and handling. It is less likely to be directly received, and the security of sealing is further increased.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a metal cap sealing container with a screw according to the present invention will be described in detail based on the drawings.
(Embodiment 1)
FIG. 1 is a half cross-sectional view of a container structure according to Embodiment 1 of the present invention, and shows a state before a canopy 4 is sealed to a threaded cylinder 3 to form a threaded metal cap. As shown in FIG. 1, a screw forming portion 3 a of a threaded cylinder 3 before forming a threaded metal cap is screwed to a spout screw forming portion 1 a of the container body 1 on the neck 2 of the container body 1. Has been. Then, the peripheral edge of the upper opening Ra of the threaded cylinder 3 extends outward in the radial direction as a canopy mounting flange 3b.
On the other hand, as shown in the upper part of FIG. 1, the circular canopy 4 has a canopy curl portion 4 a formed on the outer periphery thereof, and when the canopy 4 is attached to the opening Ra of the screwed cylinder 3, The canopy mounting flange 3b of the cylinder 3 is covered with a curled portion 4a, and the canopy curled portion 4a and the flange 3b are sealed by double tightening via a tightening sealant 4c.

In addition, the content of the pour spout sealing agent 4b is also applied to the surface of the canopy inner ring portion 4d that is in close contact with the curled portion 1b of the container body 1 curled outward during double winding. It is preferable because the sealing property of the object can be secured. The sealing material 4b may use a cut rubber in addition to the application.
As the sealing agent, a rubber-like elastic material that has been conventionally used for improving the sealing performance of a double winding portion or the like is used. Examples thereof include those mainly composed of styrene butadiene rubber, ethylene propylene rubber, polyisoprene rubber, polyamide resin, polyolefin resin and the like.

  FIG. 2 is a half cross-sectional view showing a state in which the canopy 4 is double-wrapped around the flange 3b of the threaded cylinder 3 after the container body is filled with contents. By this double winding, the canopy 4 is integrated with the threaded cylinder 3 to form a threaded metal cap 10, and the sealing of the container body 1 is completed.

  FIG. 3 shows a half sectional view of a state in which the threaded metal cap 10 that has been screwed is opened in order to take out or drink the contents from the container filled with the contents. The threaded metal cap 10 is removed by reversing the screw from the spout screw forming portion 1a in a state integrated with the canopy 4 connected to the threaded cylinder 3 by the double tightening portion 5. 1 is separated.

FIG. 4A is a cross-sectional view showing an integrated state in which the cap flange 3a is covered with the canopy 4 and connected by the double winding portion 5 to form the screwed metal cap 10. FIG. There is a spout 6 at the upper part of the container body, and the periphery of the spout 6 is designed to withstand the sealing pressure through the sealing agent with the canopy. Is provided. Furthermore, the end surface of the winding end portion of the base curl portion 6a is protected by the base sealing agent 6b. The double-tightened canopy 4 and the base curl portion 6a can ensure sealing performance by interposing a spout sealing agent 4b applied to the inner surface of the canopy. Furthermore, sufficient sealing is secured also in the double winding part 5 by the interposition of the curl sealant 4c applied to the inner surface of the canopy.
In addition, as for canopy tightening, the upper end of the container (the upper end of the curled portion (1b, 6a)) and the canopy are in close contact with each other during normal tightening as shown in FIGS. 2 and 4A. As shown in (b), the canopy and the top of the curl may be brought into contact with each other by tightly winding the canopy with a slight interval so as not to contact the top of the curl, and then squeezing the side of the cap with a roll. . Further, since the content liquid enters the gap 21 when the content liquid is filled and the remaining liquid may be spoiled by the entry of bacteria from the lower end of the cap, the content remaining in the gap 21 by providing a slit 22 as shown in FIG. It may be possible to wash out the object, or as shown in FIG. 4A, the container curl portion and the metal cap outer wall 14 may be brought into close contact so that the content liquid does not enter the gap 21 at the time of filling.

  In FIG. 4A, the diameter D of the double winding portion is set to be smaller than the outer diameter d of the body portion of the threaded metal cap 10. By setting in this way, even if the threaded metal cap 10 receives an impact from the outside during transportation or the manufacturing process, the trunk portion receives the impact preferentially and impacts the double tightening portion 5. By avoiding it, the sealing property can be secured.

(Embodiment 2)
Next, FIG. 5 shows a half cross-sectional view of a second embodiment of the threaded metal cap sealing container of the present invention. The sealing structure is a technical idea described in the container opening structure (Patent Document 2) that has already been applied for a patent by the present inventors. In the second embodiment, the outer wall and the spout (both Are collectively formed continuously from an open cylinder (cylinder that opens upward) R, and the sealability after filling the contents is more complete, and the container It is excellent in productivity during production and durability during transportation.
A method for forming the mouth and neck will be described later with reference to FIGS.

Next, the structure of the mouth / neck portion of the second embodiment will be described. As shown in FIG. 5, the mouth-and-neck portion 2 includes an inner wall 12 and an intermediate wall 13 that form the spout 6, and an outer wall 14 that is removed as a screwed metal cap 10 when opened. The inner wall 12, the intermediate wall 13, and the outer wall 14 are integrally formed continuously from the open cylinder R (see FIG. 12).
The lower outer circumference of the outer wall 14 is provided in advance with an easily breakable portion 11 (score) in which the plate thickness is reduced in a linear shape so as to be easily broken and separated from the mouth-and-neck portion 2 when the threaded metal cap 10 is opened. It has been. Further, the outer wall 14 to be removed as the screwed metal cap 10 at the time of opening includes a pressing body portion 14c, an outer wall screw forming portion 14a, and an outer wall flange portion 14b for facilitating score breaking. In order to seal the opening 6 of the mouth-and-neck portion 2 with the canopy 4, the diameter of the outer wall flange portion 14b is slightly smaller than the diameter of the curled portion 4a of the canopy 4 and is covered with the canopy 4 after filling the contents. Sealed by heavy winding.

Here, the pressing body portion 14c is for gripping this portion with two fingertips at the time of opening and pressing it to dent inward in the diametrical direction, and to give a breakable separation starting point to the easily breakable portion by its bending stress. is there. If necessary, the position can be changed several times and pressed to break the entire score. Then, the outer wall 14 can be continuously screwed back and the threaded metal cap 10 can be separated and opened from the neck 2.
In this way, the opening operation is the same as that of the conventional metal cap, but after the filling of the contents, it is possible to apply the double winding method that is performed at high speed rotation, so that high speed filling of the beverage into the container is ensured. . In particular, in the container of the second embodiment, since the boundary between the inside of the container and the outside air is only the canopy part double winding part that has been proven as a sealing technique for many years, a container with extremely high sealing performance can be realized.

FIG. 6 shows a half sectional view in which the canopy 4 shown in FIG. 5 is double-rolled around the outer wall flange portion 14b to form the double-winding portion 5 and sealed after filling the contents. When the threaded metal cap 10 is opened, it is separated from the easily necked portion 11 surrounded by A in the figure from the mouth-and-neck portion 2.
FIG. 7 is an enlarged view of the portion A shown in FIG. 6, and shows an enlarged cross-sectional view (a) and a broken-separated state cross-sectional view (b) of the easily breakable portion 11. As shown in FIG. 7 (a), the easily breakable portion 11 provided at the lower portion of the outer wall 14 becomes the starting point of breaking separation when the outer wall 14 is pressed inward as indicated by a broken line B in FIG. 7 (b). By reverse screwing (↑ direction), the fracture surface 11a is broken on the mouth and neck 2 side, and the fracture surface 11b is separated on the screwed metal cap 10 side.

  FIG. 8 shows a state in which the canopy 4 shown in FIG. 6 is wound and opened from the sealed metal cap sealed container with screw by reverse screwing, and the metal cap 10 with screw and the container body 1 are separated. A half sectional view is shown. In addition, as for the kind of container main body in this Embodiment 2, it is desirable to form as a can body seamless can which forms a container main body by press work.

(Embodiment 3)
In the container of the third embodiment, a mouth and neck part in which a spout and an outer wall are continuously and integrally formed is manufactured separately from the container body, and is wound and integrated on the upper part of the container body 1 as a mouth and neck member 2a. Is done. FIG. 9 shows a half cross-sectional view of a state before the canopy 4 is fixed to the container of the third embodiment, except that the neck and neck member 2a is connected to the upper part of the container body 1 by a double winding part 5a. The structure is the same as that described with reference to FIGS. It is not necessary to install various types of manufacturing equipment for each container size by manufacturing the neck and neck members separately as general-purpose parts and connecting the general-purpose mouth-neck members to various container sizes. There are significant advantages in terms of capital investment.
In addition, although the can body seamless can is used for the container body in the present embodiment, the type of can molding is formed as a can body seamless can in which the container body is formed by pressing as in the second embodiment. It is desirable.

(Embodiment 4)
In the metal cap sealing container with a screw according to the fourth embodiment, the mouth-and-neck member described in the third embodiment is connected to the upper part of the container body 1 having the can body welded seam 20 by the double tightening portion 5a. The upper canopy 4 shown in the half sectional view of 10 is fixed to the container. The container body 1 applied to the threaded metal cap sealing container of Embodiment 4 is a container that also seals the bottom surface, and a seam can is usually used. However, it is preferable to use a welding method as the can body molding. And the bottom cover 7 is being fixed to the opening part of the container main body 1 bottom by double winding 5b.

(Embodiment 5)
Next, FIG. 11 shows a half sectional view of the threaded metal cap sealing container of the fifth embodiment. Although the container of Embodiment 1-4 demonstrated above was a so-called bottle-shaped type which narrowed down the diameter of the mouth-and-neck part from the diameter of the container main body, the container of Embodiment 5 shown in FIG. The mouth-and-neck portion 2 is a wide-mouthed container in which the diameter of the container body 1 is substantially the same, and the appearance of the container is cylindrical. The container is the same as the container of Embodiment 2 except that the container is a wide-mouthed container and the container bottom has a dome shape. The metal cap sealing container with a screw according to the fifth embodiment has an effect that the mouth is large and easy to drink like a cup after opening the metal cap with a screw.
Moreover, if it is a wide mouth, the form which makes the mouth neck member (2a) and canopy (4) of Embodiment 3 (FIG. 9) or Embodiment 4 (FIG. 10) a wide mouth may be sufficient.

  In addition, although the container of Embodiment 1-5 demonstrated above has demonstrated the case where a double winding method is applied as a method of sealing a canopy, as a sealing method of a canopy, a double winding method In addition, known clinch sealing, fitting sealing, adhesion, high-frequency adhesion (= maximum sealing), and the like are also applicable.

  Moreover, the container main body of the metal cap sealing container with a screw | thread of this invention uses containers, such as general metals, such as steel and aluminum, plastics, and paper.

(Production method)
Next, the manufacturing method of a metal cap sealing container with a screw is demonstrated using FIGS. Below, the manufacturing method of the container (refer Embodiment 2 and refer FIGS. 5-8) which forms a mouth neck part continuously from the cylinder opened upwards is demonstrated.
(First step)
First, a circular metal plate P such as an aluminum alloy is drawn and formed into a cylindrical cup Q.

(2nd to 3rd steps)
Next, the diameter and height (depth) of the open cylinder R whose upper part is released by redrawing and ironing are secured in the cylindrical cup Q. Note that the method of forming the open cylinder R is not limited to redrawing and ironing, and a press working method such as a thinning drawing method or a combination of the thinning drawing method and the ironing method can be applied.

(4th process)
After the opening cylinder R is formed, the opening Ra is pressed from the inside and outside of the opening cylinder R into a small-diameter cylinder that becomes the mouth and neck of the container, and the outer wall planned portion Rb, intermediate wall planned portion Rc, inner wall of the mouth and neck portion The planned portion Rd is formed. In addition, it is desirable to form the thickness of the intermediate wall planned portion Rc as a thin wall at the time of the third step so that bending molding can be easily performed by the vertical pressurization (seventh step) in the subsequent molding process.

(5th process)
Next, the small-diameter cylindrical portion is inserted into a mold frame S having a desired shape on the inner surface, and an internal pressure (in the direction of the arrow) by the elastic body T is applied from the inside of the small-diameter cylinder to place the planned outer wall portion Rb in the mold frame S. Bulge molding to match the shape of

(6th process)
In the lower part of the outer periphery of the planned outer wall portion Rb, an easily breakable portion is provided with the outer peripheral side of the rotary roll U as a blade-like roll.

(7th to 8th steps)
Pressurizing with a pressure plate V downward from the opening portion Ra of the small-diameter cylindrical portion, the thin intermediate wall planned portion Rc is bent and folded outside the planned inner wall portion Rd, and at the same time, the outer wall is disposed outside the planned intermediate wall portion Rc. The planned portion Rb is overlapped, the inner wall planned portion Rd is formed as the inner wall 12, the intermediate wall planned portion Rc is formed as the intermediate wall 13, and the outer wall planned portion Rb is formed as the outer wall 14 to complete the mouth-and-neck portion of the triple wall structure (see FIG. 5). Further, the opening Ra of the small-diameter cylinder is subjected to a flange-out process for tightening the canopy.

(9th step)
The outer thread machining roll Wa and the inner thread machining roll Wb are pressed and rotated inside and outside the mouth and neck portion of the triple wall structure to form the screw engaging portion 15.

  In the above description of the manufacturing method, the container according to the second embodiment has been described. However, with respect to the container according to the first embodiment, the bottom of the open container R formed in the third step described above is cut and removed. And cover the mouth and neck 2 of the container body 1 as a metal cap 3, and then press the outer and inner threading rolls on the inside and outside of the double wall structure of the metal cap 3 and the mouth and neck 2. Rotate to form a screw engagement portion.

  As for the containers of the third and fourth embodiments, the lower portion of the open container R formed up to the ninth step is cut and removed in the same manner as the container of the second embodiment, and the lower portion is opened. Form the neck. Thereafter, it is combined with the upper opening of the separately manufactured container body and connected and integrated by means such as winding.

  The container body without a canopy manufactured as described above is filled with the contents from the opening (mouth neck), and then covered with the canopy over the opening, and then double-tightened to complete the sealing of the container body. To do. These molding methods are merely examples. For example, instead of the bulge molding in the fifth step, the outer wall planned portion Rb may be expanded by spin molding, and the flange out processing at the end of the eighth step is performed after the ninth step. May be.

  In the present invention, since many existing canopy tightening facilities can be used as they are, it is not necessary to newly introduce cap mounting facilities. Further, since the canopy is sealed by high-speed double winding, high-speed filling of the contents in the screwed metal cap sealing container can be realized. The contents are not limited to various beverages such as low-acid beverages, fruit juice beverages, sports beverages, milk-containing beverages, tea-based beverages, carbonated beverages, beer, sparkling liquor, alcoholic beverages, and foods such as soups and sauces. The container can be used regardless of negative pressure or positive pressure.

It is a half sectional view of the container structure of Embodiment 1 of the present invention. FIG. 3 is a half cross-sectional view showing a state in which a canopy is double-wound around a cap flange on the container body of the first embodiment. FIG. 3 is a half cross-sectional view of a state in which a threaded metal cap that has been screwed onto the container of the first embodiment is opened. (A) is sectional drawing of the container of Embodiment 1 of the integrated state which covered the cap flange with the canopy and connected with the double winding part, and comprised the screwed metal cap, (b), (c) ) Is a cross-sectional view showing another type and form of double winding. 6 is a half cross-sectional view of a threaded metal cap sealing container of a second embodiment. FIG. It is a half cross-sectional view of the container of Embodiment 2 in which a canopy is double-clamped around an outer wall flange part to form a double-clamped part and sealed. FIG. 7 is an enlarged view of a portion A shown in FIG. 6, which is an enlarged cross-sectional view (a) of an easily breakable portion and a broken-separated state cross-sectional view (b). FIG. 5 is a half cross-sectional view showing a state in which a screw cap and a container main body are separated by unscrewing a canopy from a screw cap metal cap sealing container in a sealed state by reversing the screw. FIG. 10 is a half cross-sectional view of a state before a canopy is fixed to a container according to Embodiment 3. It is a half cross-sectional view of the container of Embodiment 4 which shows the state which connected the mouth neck member demonstrated in Embodiment 3 to the upper part of a container main body by the double winding part. FIG. 10 is a half cross-sectional view of a threaded metal cap sealing container of a fifth embodiment. It is explanatory drawing of the process shaping | molding process of the mouth neck part in Embodiment 2 (1st-4th process). It is explanatory drawing of the process shaping | molding process of the mouth-and-neck part in Embodiment 2 (5th-6th process). It is explanatory drawing of the process shaping | molding process of the mouth neck part in Embodiment 2 (7th-8th process). It is explanatory drawing of the process shaping | molding process of the mouth-and-neck part in Embodiment 2 (9th process).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Container main body 1a ... Spout screw formation part 2 ... Mouth neck part 2a ... Mouth neck member 3 ... Cylinder 3a with a screw ... Screw formation part 3b ... Canopy attachment Flange 4 ... Canopy 4a ... Canopy curl 4b ... Spout sealing agent 4c ... Curling sealant 4d ... Inner ring 5 ... Double tightening part 5a -Double winding part 5b ... Double winding part 6 ... Spout 6a ... Base curl part 6b ... Base sealant 7 ... Bottom lid 10 ... Metal cap 11 with screw ... Easily breakable part 12 ... Inner wall (spout)
13 ... Intermediate wall (spout)
14 ... outer wall 14a ·· · outer wall screw forming portion 14b · · outer wall flange portion 14c · · · press barrel 15 · · · screw engagement portion 20 · · · can barrel welded seam portion 21 · · · clearance 22 · · · Slit P ... Metal plate Q ... Cylindrical cup R ... Opening cylinder Ra ... Opening part Rb ... Outer wall planned part Rc ... Intermediate wall planned part Rd ... Inner wall planned part S .... Mold frame T ... Elastic body U ... A pair of rotating rolls V ... Pressure plate

Claims (2)

For sealing a container with a base curl part,
A threaded cylinder with an opening above,
A screwed metal cap comprising a canopy that seals the opening and also seals the cap curl of the container,
On the canopy,
In order to ensure sealing with the upper end of the base curl part,
Sealing agent is provided on the inner ring part and the inner ring part surface ,
Sealing the canopy by double winding,
The outer diameter (D) of the double tightening portion of the canopy is smaller than the outer diameter (d) of the threaded metal cap,
A metal cap with a screw, wherein the outer wall of the cap is brought into close contact with the container curl portion so that the content liquid does not enter the clearance (21) between the container curl portion and the metal cap outer wall . When sealing a spout with a cap curl with a metal cap with a screw,
The threaded metal cap has an opening at the top,
In a metal cap sealing container with a screw that seals the opening with a canopy,
In the canopy,
In order to ensure sealing with the upper end of the base curl part,
Sealing agent is provided on the inner ring part and the inner ring part surface ,
Sealing the canopy by double winding,
The outer diameter (D) of the double tightening portion of the canopy is smaller than the outer diameter (d) of the threaded metal cap,
A metal cap sealing container with a screw , wherein the cap outer wall is brought into close contact with the container curl portion so that the content liquid does not enter the clearance (21) between the container curl portion and the metal cap outer wall .

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