JPH06122463A - Hermetically closing cap - Google Patents

Abstract

PURPOSE:To obtain a hermetically closing cap which has a good barrier property and can be decorated by printing. CONSTITUTION:A hermetically closing cap comprises a flexible type synthetic resin member 3 and a rigid type synthetic resin member 4: the flexible type synthetic resin member 3 has a side wall on which protuberance 31 designed to be fitted and fastened under an outwardly raised part 52 of the mouth of a vessel an formed and a horizontal top plane 21 on which a metal member 2 is provided; the rigid type synthetic resin member 4 is provided on the flexible type synthetic resin member 3 in a manner of covering the peripheral edge of its top plane and side wall downward. The metal member 2 has an outer diameter which is larger at all peripheral points than the diameter of the inner circumference of the mouth of the vessel. The rigid type synthetic resin member 4 has its lower end lower than at least the protuberance 31. With the side wall of the cap having high rigidity in this structure, the vessel (bottle) 5 can be hermetically closed; the metal member 2 gives a barrier property to the cap; and printing is applicable to the top surface of the cap.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed cap used as a lid for a container made of glass or the like.

[0002]

2. Description of the Related Art Heretofore, as a sealing cap of this kind, there has been a type in which a means for engaging with a bottle container is of a fitting type, and a material made of metal or synthetic resin is generally used. ing.

[0003]

Among the above-mentioned fitting type sealing caps, those made of metal are excellent in barrier property and have an advantage that they are excellent in design in that appropriate printing can be performed on the top surface. Since the opening operation is performed by tearing a part of the cap, there is a risk of injury at the broken portion, and there is a problem that the lid cannot be opened again once it is opened. On the other hand, those made of synthetic resin have some elasticity and therefore can be fitted and removed, but there are problems that they are poor in barrier properties and it is not easy to impart design properties.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a sealing cap excellent in barrier property and designability.

[0005]

In order to achieve the above object, a hermetically sealed cap of the present invention is provided with a side wall provided with a projection for engaging and locking an outward protrusion of a container mouth and a metal member. In a closed cap made of a soft synthetic resin member having a horizontal top surface portion, and a hard synthetic resin member provided so as to cover the side wall downward from the outer peripheral edge portion of the top surface of the soft synthetic resin member, the metal member is The outer diameter is larger over the entire circumference than the inner circumference of the container mouth, and the lower end of the hard synthetic resin member is located at least below the protrusion.

[0006]

In the hermetically closed cap having the above-mentioned structure, the metal member covers the mouth of the bottle container when the lid is closed, and serves to provide a high barrier property. Further, the hard synthetic resin member acts to increase the rigidity of the side wall of the cap.

[0007]

EXAMPLES Examples will be described below with reference to the drawings.

FIG. 1 is a half sectional view showing a bottle container having a sealing cap according to the present invention, FIG. 2 is a top view of the sealing cap, and FIG. 3 is a partially enlarged sectional view of FIG. As can be seen, the sealing cap 1 includes the metal member 2
And a soft synthetic resin member 3 and a hard synthetic resin member 4 which are integrally molded with the metal member 2.

The metal member 2 has a thickness of 0.1 to 0.5, for example.
It is formed by punching an aluminum plate of mm into a predetermined shape, and its outer circumference is made larger than the inner circumference of the bottle container over the entire circumference. Further, the metal member 2 is 0.1 mm
The following aluminum foil may be used. The material may be metal other than aluminum, such as iron. Also,
Since it is made of metal, the top surface can be appropriately printed in advance.

The soft synthetic resin member 3 is integrally attached to the metal member 2 and has a projection 31, which is fitted and locked on the outward protrusion 52 of the mouth 51 of the bottle container 5, inside.
Also, it has a shape in which the projecting piece 32 for opening is provided outside the lower end.

The soft synthetic resin member 3 is integrally attached to the metal member 2 by setting the metal member 2 in a mold and integrally molding the synthetic resin around the metal member 2 by insert molding. The metal member 2 may be attached by using an adhesive. Here, as the material of the soft synthetic resin member 3, a soft resin such as polyethylene is used.

The hard synthetic resin member 4 has a ring shape which can be set so as to cover the side surface of the soft synthetic resin member 3 from the outer peripheral edge of the top surface downward to the projecting piece 32. The inner diameter of the hard synthetic resin member 4 is preferably smaller than the outer diameter of the metal member 2 so that the end surface of the metal member 2 is covered with the hard synthetic resin member 4.

The hard synthetic resin member 4 is used by being molded with a separate mold and then combined with the soft synthetic resin member 3. However, in the combined state, the hard synthetic resin member 4
Is located below the protrusion 31 of the soft synthetic resin member 3. Here, the hard synthetic resin member 4
A hard resin such as polypropylene is used as the material.

The hermetically sealed cap 1 has the mouth portion 51 of the bottle container 5 after filling the bottle container 5 with contents such as liquid.
Is fitted and fixed to. In this case, when the soft synthetic resin member 3 is pushed in, the projection 31 of the soft synthetic resin member 3 rides over the outward protrusion 52 of the mouth 51 of the bottle container 5 and is lightly engaged while being pushed outward. Subsequently, a hard synthetic resin member 4 having a high rigidity that does not deform even when pushed outward is placed over the soft synthetic resin member 3 and pushed in strongly, whereby the soft synthetic resin member 3 is compressed and deformed by the force from both inside and outside. Then, the bottle container 5 is sealed by the cap 1 in a state in which it is in close contact with the protruding portion 52. Then, the outer side of the cap 1 is sealed by shrink wrapping to form a sales form. At the time of opening, after peeling off the shrink wrap, the protrusion 32 of the soft synthetic resin member 3 is pushed up to project the protrusion 31 and the protrusion 5 of the bottle container 5.
Try to disengage with 2. Further, it can be used as a removable cap after opening.

In the above embodiment, the hard synthetic resin member 4 is applied after the soft synthetic resin member 3 is pushed into the bottle container 5, but the soft synthetic resin member 3 and the hard synthetic resin member 4 are separately provided. It does not matter if the combination is pushed into the bottle container 5.

[0016]

As described above, the airtight cap of the present invention is a soft synthetic material having a side wall provided with a projection for engaging and locking with the outward protrusion of the container mouth and a horizontal top surface provided with a metal member. A sealing cap made of a resin member and a hard synthetic resin member which is provided so as to cover the side wall downward from the outer peripheral edge of the top surface of the soft synthetic resin member, wherein the metal member has an inner circumference of the container mouth portion. Since the outer diameter is larger over the entire circumference than that, and the lower end of the hard synthetic resin member is configured to be located at least below the protrusion, there is no injury to the metal end surface during the opening operation,
Moreover, it is possible to have excellent barrier properties and design properties while being resealable.

[Brief description of drawings]

FIG. 1 is a half sectional view showing a bottle container to which a sealing cap according to the present invention is attached.

FIG. 2 is a top view of a sealing cap.

3 is a partially enlarged sectional view of FIG.

[Explanation of symbols]

 1 Sealing Cap 2 Metal Member 21 Top Surface 3 Soft Synthetic Resin Member 31 Protrusion 32 Projecting Piece 4 Hard Synthetic Resin Member 5 Bottle Container 51 Mouth 52 Protrusion

Claims (1)

[Claims] 1. A soft synthetic resin member having a side wall provided with a projection for engaging and locking with an outward protrusion of a container mouth and a horizontal top surface portion provided with a metal member, and a ceiling of the soft synthetic resin member. In a sealing cap made of a hard synthetic resin member that is provided so as to cover the side wall downward from the outer peripheral edge portion,
The hermetically sealing cap, wherein the metal member has an outer diameter larger than the inner circumference of the container mouth portion over the entire circumference, and the lower end of the hard synthetic resin member is located at least below the protrusion.