JPS6038492Y2 - Paper containers with sealing, easy opening, and re-closing functions - Google Patents

Description

[Detailed description of the invention] The present invention is a paper container or a composite container made of paper and a synthetic resin, by edging and covering the mouth edge of the spout provided in the container body with synthetic resin. This invention relates to a sealed container that can perform the functions of sealing, opening, and re-closing using a molded resin lid.

Conventionally, this type of paper container has had various drawbacks in its spout portion.

The main ones are as follows: (1) In the case of milk container A, as shown in Fig. 1, a spout 3 is bored in the paper container body 1 whose front and back sides are coated with polyethylene. A lid 2 made of thin lid paper coated with polyethylene is heat-sealed to the outer surface of the container, but since the spout 3 is punched out in such a container, the cross section of the container body 1 is exposed. As the container was being heated, the milk content was gradually seeping into the container, causing problems with its shelf life and the container itself.

(2) In the case of milk container B, as shown in Figure 2, the paper container body 1 is coated with polyethylene on both the front and back sides.
A spout 3 is bored in the spout 3, and a lid 2 made of thin lid paper coated with polyethylene is heat-sealed on the outside of the spout 3, and a polyethylene film 4 is pasted on the inside of the spout 3. However, with this method, the polyethylene film 4 can prevent the milk content from penetrating into the punched cross section of the spout 3, but when using this product, the lid 2 must be removed. After removal, the polyethylene film 4 must be further torn with a protrusion such as a straw, which is a hassle.

(3) In the case of a liquor container (1.8 f filled and re-closeable spout type), as shown in Fig. 3, a spout 3 is bored in a paper container 1 whose front and back sides are coated with polyethylene.
This spout 3 has a synthetic resin hollow-shaped nozzle 2 with a cap 5.
is heat-sealed to the outer surface of the paper container 1 using the outer flange 6, and a polyethylene film 4 is attached to the inner surface of the spout 3. Although it is possible to prevent the liquor content from permeating through the punched cross section, if the polyethylene film 4 is pierced and the liquor is poured repeatedly, the liquor will leak through the cross section through the gap between the nozzle 2 and the spout 3. Penetrates between the exposed paper layers of the container 1, causing problems not only in the preservation of the liquid content but also in deformation of the container 1.

The present invention was developed to eliminate these drawbacks, and the rim of the spout of paper containers, etc. is covered with a synthetic resin injection molding to best achieve the purpose. be.

The present invention will be described with reference to drawings of embodiments thereof.

In FIG. 4, the paper container main body 10 is made of a laminate of paper 10' and aluminum foil 10'', with both sides covered with polyethylene 10
This container body 10 is coated with
In order to cover the punched exposed surface of the spout 11 formed by punching out the spout 11, a molded resin lid 12 is placed in advance, with the protrusion 13 at the center of the spout 11, and a flange 14 on the outer periphery.
The polyethylene film 10'' on the outer surface of the container body 10
This is done by heat-sealing the molded resin and extending it from the injection gate using a molded material and injecting it into the mouth edge of the spout 11.

The injected synthetic resin is welded to the polyethylene film 10'' on the inner surface of the container body 10, and the spout 11
The diurnal edge is filled in and welded around the resin molded lid 12 and its protrusion 13.

In this manner, the punched exposed surface of the spout 11 is completely covered by the spout member 15, which has the edge portion of the spout 11 covered with an injection-molded synthetic resin.

Note that this molding order may be such that the spout member 15 is first injection molded, and the molded lid 12 is then welded.

Further, a ring-shaped groove 17 is provided on the surface of the molded lid 12.

When using a container in which the container main body 10 is sealed with the molded lid 12 after filling the container with the liquid content, the molded lid 12 is used to pour out the liquid content.
When the flange 14 of 2 is pulled up, the polyethylene film layer 10'' on the surface of the container body 10 and the paper layer 10 are removed.
A peeling phenomenon occurs between the layers ', and the welding between the molded lid 12 and the spout member 15 can be easily peeled off by using a similar combination of resins and by welding in a narrow range.

In this case, since there is a ring-shaped groove 17 on the surface of the flange 14, there is a ring-shaped groove 17 on the surface of the flange 14. It becomes easier to pick.

When the lid needs to be closed once after opening and using the contents, the protrusion 13 of the molded lid 12 should be tightly fitted into the center hole 16 of the injection molded spout member 15, and the molded lid 12
can be easily reopened and closed by pinching the flange 14.

Since the present invention has the above-described structure, the spout of the container body is sealed in two places: the lower surface of the flange of the molded lid, and the outer surface of the container body and the injection-molded spout member. This is done completely by welding, and when opening the container, it can be easily done by delamination between the polyethylene film layer and paper layer on the outside of the container body, and by the use of a similar resin between the molded lid and spout member. Furthermore, the molded lid can be reclosed by tightly fitting the protrusion of the molded lid into the center hole of the injection-molded spout member.

Such a stable re-closing lid is possible because the spout member is reinforced by injection molding.

In addition, the molded lid used when forming the original sealed container also serves as the lid when the container is reopened and closed during use.

Moreover, in the present invention, even when used for a relatively long period of time due to reopening and closing of the molded lid, the rim of the punched out spout of the container body is covered with a rim by injection molding of synthetic resin, so that the spout can be closed. Because the rim of the paper container is reinforced, there is no risk of the content liquid penetrating into the punched surface, deterioration of the internal solution, or deformation due to infiltration of the paper container body, so it can be used as a paper container with a spout. is extremely useful.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the main part of a conventional milk container A, Fig. 2 is a cross-sectional view of the main part of the same case B, Fig. 3 is a cross-sectional view of the main part of a conventional liquor container, and Fig. 4 1 is a sectional view of a main part of a container of the present invention. 10... Container body of the container of the present invention, 11...
...Pour spout, 12...Glue resin molded lid, 13.
...Protrusion part, 14...Brim part, 15...
... Spout member, 16... Center hole.

Claims (1)

[Scope of utility model registration request] The rim of the pouring spout is injected into a paper container laminated or coated with synthetic resin on both sides, or a composite container with synthetic resin mainly made of paper laminated with synthetic resin on the outside and aluminum foil on the inside. The rim is coated with synthetic resin, and the protruding part of the resin box-shaped lid is tightly fitted into the spout, and the outer periphery of the flange is heat-sealed to the outer surface of the container body and the spout member of the spout. A paper container with the functions of sealing, easy opening, and re-closing.