JPH09226707A - Sealing method of container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely seal a mouth of a lid after the content is filled even in the condition where the lid having the mount is fitted to a container body in advance so that the sealing can be easily performed even in a sterilized chamber. SOLUTION: After the content 6 is filled in a container 5 in which a lid having a mouth 3 is fitted to an opening part 2 of a container body 1 in advance, a tab seal material 7 is stacked on an upper surface of the mouth 3. After heating and pressing by a heating seal member whose heating and pressing surface is spherical, heating and pressing is performed by a heating and sealing member 11 whose heating and pressing surface is of same spherical shape as that of the heating sealing member and which has a projected part 11a of similar shape to the shape of the mouth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sealing an opening after filling a preformed container with contents, and in particular, before filling a lid member having a sealing mouthpiece with the container. The present invention relates to a method of filling a content in an opening after sealing the opening after attaching the opening to the main body.

[0002]

2. Description of the Related Art As shown in FIG. 5, a container 5 in which an opening 2 of a preformed container body 1 is sealed with a lid member 4 having a spout 3 is generally used. The production of this container and the filling and sealing of the contents are performed by filling the contents from the upper opening 2 of the container main body 1 in which the body and the bottom are preformed, and pre-sealing the opening 2 with the drinking mouth 3. The lid member 4 sealed with the member 7 was used, and the lid member 4 was sealed by the drop lid method.

As described above, since the sealing is performed by the drop lid method, the lid material needs to be formable, and it is difficult to use paper, which is difficult to form, especially cardboard as a material for the lid material. Also, when performing aseptic filling, it is necessary to sterilize the lid material that is a separate member from the container body, and further, in the aseptic champer,
The process of filling the container body with the contents and then sealing with another lid member requires a very complicated operation.

[0004] Here, in order to ensure the sealing of the opening of the container even in the sterile chamber, a lid member having a drinking spout is used.
This can be facilitated by attaching it to the container body in advance, filling the contents from the drinking mouth, and then sealing the drinking mouth. However, when the lid is integrated in advance and the mouth is sealed while the contents are filled, the receiving part of the heating seal member cannot be provided inside the container body, so a seal that maintains a certain sealing strength. I didn't want to Therefore, the above-mentioned drop lid method has been generally used as the sealing method for the molded container sealed with such a lid material.

[0005]

Therefore, according to the present invention, in order to facilitate the sealing operation even in a sterile chamber, even after the lid material having the drinking mouth is attached to the container body in advance, after filling the contents, An object of the present invention is to provide a method for sealing a container that surely seals a mouth of a lid material.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a container having a lid body having a drinking mouth attached to the opening of a container body is filled with contents, and a tab seal material is superposed on the upper surface of the drinking mouth. A heating and pressing surface is a spherical heat sealing member, and after heating and pressing, the heating and pressing surface has the same spherical shape as the heating sealing member and has a protrusion similar to the shape of the drinking mouth. This is a method of sealing a container by heating and pressurizing it.

Further, according to the present invention, after the contents are filled in a container in which a lid member having a drinking mouth is attached to the opening of the container body in advance, a tab seal material is placed on the upper surface of the drinking mouth, and a heating and pressing surface is applied. Is a spherical heat-sealing member having a projection similar to the shape of the mouth, and after heating and pressurizing, the heat-pressurizing surface is heated and pressed by the same spherical heat-sealing member as the heat-sealing member. This is a method of sealing a container to be sealed. In the above-mentioned sealing method, a container is sealed using a lid material to which a tab sealing material is attached in advance.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, a container 5 having an opening 2 of a container body 1 to which a lid member 4 having a drinking port 3 is previously attached is filled with contents 6. On the top surface of the lid member 6, a tab seal member 7 for sealing the drinking spout 3
One end of is fixed and is in a standing state. next,
As shown in FIG. 2, the tab sealing material 7 is laid down to close the drinking mouth 3, and the heating and pressing surface has a spherical heating and pressing surface from above.
Heat and press at 0. Then, as shown in FIG. 3, the heating and pressing surface is further spherical, and the heating and pressing is performed by the heating seal member 11 having the projection 11a similar to the drinking mouth,
This is a method of sealing a container to be sealed.

Here, the sealing of the tab seal material 7 by the heat seal member 10 and the heat seal member 11 is not performed in the above order, but the heat seal member 11 and the heat seal member 10 are performed.
You may go in order.

The lid member 4 which has been subjected to such a sealing method is
Laminated materials including paper are suitable because they have a repulsive force when heated and pressed. Further, the tab sealing material 7 is made of a laminated material having a resin layer having a heat-sealing property on its lower surface, and one end of the tab sealing material 7 is previously sealed to keep the standing state.
A configuration including a metal foil such as an aluminum foil is preferable.

The spherical shapes of the heat seal member 10 and the heat seal member 11 are as shown in FIG.
Center C1 of heating and pressing surface and center C2 of spherical surface of heating and pressing surface
The shape is formed so as to coincide with the center P of the container.

Here, the sealing of the tab seal material 7 by the heat seal member 10 and the heat seal member 11 is not performed in the above order, but the heat seal member 11 and the heat seal member 10 are performed.
You may go in order.

[0013]

As described above, according to the present invention, there is provided a heat-sealing material having such a spherical heat-pressurizing surface, and the heat-pressurizing surface of one of the heat-sealing materials is provided with a protrusion having a shape similar to a drinking mouth. Therefore, when the drinking spout is sealed with the tab sealing material, the sealing can be surely sealed even if there is no pedestal inside the lid material.

Further, since the center of the spherical surface of the heat seal material is aligned with the center of the container, not the center of the heat seal member,
During the heating / pressurizing seal, the drinking mouth is also deformed in a state matching the deformed state of the lid member, so that the tab seal member can be reliably sealed.

Furthermore, since the contents can be filled and the drinking spout can be sealed while the lid is attached to the container body in advance, it is not necessary to supply the lid at the filling portion, and aseptic filling packaging can be performed. It can be performed with a device having a simple structure.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of the structure of a container for carrying out the sealing method of the present invention.

FIG. 2 is an explanatory view showing a state in the middle of the sealing step of the container shown in FIG.

FIG. 3 is an explanatory diagram showing the end state of the steps of the container sealing method shown in FIG.

FIG. 4 is an explanatory diagram showing the relationship between the heat-sealing member and the container used in the method of the present invention.

FIG. 5 is an explanatory cross-sectional view showing the structure of a conventional molded container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Container main body 2 ... Opening part 3 ... Drinking mouth 4 ... Lid material 5 ... Container 6 ... Contents 7 ... Tab sealing material 10, 11 ... Heat sealing member 11a ... Protrusion

Claims (3)

[Claims] 1. A container in which a lid member having a drinking mouth is previously attached to the opening of the container body, is filled with contents, and a tab seal material is superposed on the upper surface of the drinking mouth, and the heating and pressing surface is spherical. In the heat seal member, after heating and pressurizing, the heat pressurizing surface has the same spherical shape as the heat seal member, and the heat seal member having a protrusion similar to the shape of the drinking mouth is heat pressed and sealed. Sealing method. 2. A container in which a lid member having a drinking mouth is previously attached to the opening of the container body, is filled with contents, and a tab seal material is superposed on the upper surface of the drinking mouth so that the heating and pressing surface is spherical. And a heating seal member having a protrusion similar to the shape of the drinking spout, and after heating and pressurizing, a heating and pressurizing surface of the container is sealed by heating and pressurizing with the same spherical heat seal member as the heat seal member. Sealing method. 3. The container sealing method according to claim 1 or 2, wherein a lid material to which a tab sealing material is previously attached is used in the sealing method.