JPH0451190Y2 - - Google Patents

Description

[Detailed explanation of the idea]

Purpose of invention

[Industrial application field]

The present invention relates to a lid for a container which, once opened, becomes obvious that it has been opened and cannot be resealed as if it had not been opened.

[Conventional technology]

Packaging containers containing food can be dangerous if they are opened, poisonous substances are mixed in, and then resealed as if they had never been opened, so such actions must be prevented. Several methods have been tried to prevent this, such as seal sealing, but nothing is definitive yet.

[Problem that the invention attempts to solve]

In view of the above-mentioned current situation, the purpose of the present invention is to prevent packaging containers from being opened, some of the contents removed, or foreign objects mixed in, and then resealed as if they had never been opened. To provide a lid for a container that makes it clear that it has been opened. Structure of the idea

[Means to solve the problem]

As shown in FIGS. 1 and 2, the lid of the container of the present invention, which makes it obvious that the container has been opened, is placed on a lid 2 having an opening 1 for taking out the contents.
The lid of the container is formed by sealing a pull tab 3 made of a larger plastic film, metal foil or a laminated material thereof, and is characterized in that a notch 5 is provided at an appropriate position within a sealing area 4 of the pull tab 3. As the lid material, a metal foil such as aluminum foil or a plastic film such as polyethylene laminated thereon is used. The material of the pull tab is a plastic film such as polyethylene, polypropylene, polyester, or ethylene-vinyl alcohol copolymer, metal foil such as aluminum foil, or a laminate thereof, and a sealant layer is provided as the innermost layer. . The pull tab may be sealed to the lid by heat sealing, high frequency sealing, or the like. In order to provide the notch 5 in the pull tab 3 within the seal area 4, it is sufficient to seal the pull tab 3 onto the lid material 2 and then press work to make the notch only in the pull tab. This press process, for example, has a circular concave corner edge, which is sandwiched between a square shape with sharp corner edges and a rounded square shape, and by controlling the pressure at that time, the lid material is simultaneously formed. This can be done by cutting only the pull tab material into a circular shape. The shape, size, and number of cuts are arbitrary.

[Effect]

When the container lid of the present invention is opened by pulling the pull tab, the pull tab 3 made of plastic film, metal foil, or a laminate thereof is slightly stretched due to tension. As shown in FIGS. 1 and 2, a portion 6 of the pull tab surrounded by the notch 5 provided in the pull tab 3 of the sealing area 4 is not removed from the lid material as shown in FIGS. 3 and 4. The pull tab 3 remains attached to the pull tab 2, and a corresponding small hole is formed in the pull tab 3. Once the package is opened, even if you try to reseal the pull tab 3 to the lid 2, the pull tab 3 will be stretched, so the part 6 of the pull tab left on the lid 2 will fit perfectly with the small hole. cannot be resealed. Therefore, it can be seen that the package has been opened.

【Example】

A laminate of aluminum foil 130μ/polyethylene 80μ was punched to form a circular lid having an opening for taking out the contents. A lining material for a pull tab was prepared by pressing a 100μ thick polyethylene sheet. In addition, a pull tab material was formed by pressing a laminate of 12μ polyester/40μ aluminum foil/50μ sealant. Place the above-mentioned pull tab lining material from the lid onto the opening of the lid material, overlay the pull tab material from the front,
A lid was formed by pasting together by heat sealing.
Next, six circular notches 5 as shown in FIG. 1 were formed in the sealing area of the pull tab by press working. The lid was heat-sealed to an aluminum can body whose inner surface was coated with polyethylene to form a beverage container. When the container was opened, a portion 6 of the pull tab remained on the lid 2 as shown in FIG. 3, and a small hole was formed in the pull tab 3. When I tried to reseal the pull tab to the lid, I was unable to align the part of the pull tab that remained on the lid with the small hole in the pull tab, and I was unable to reseal it as if it were unopened. Ta. Effects of the Invention If the container lid of the present invention is used for a beverage container or the like, the fact will be obvious to everyone once the container is opened. Therefore, it is impossible to open the container, remove a portion of the contents, or mix other substances into the container and then pretend that the container is unopened.

[Brief explanation of drawings]

1 and 2 show an example of a container lid of the present invention that makes it obvious that it has been opened; FIG. 1 is a plan view, and FIG. 2 is a sectional view in the direction of FIG. 1. It is. 3 and 4 show the state of the lid of the container when it is opened, with FIG. 3 being a plan view and FIG. 4 being a sectional view in the direction of FIG. 3. 1... Removal port, 2... Lid material, 3... Pull tab, 4... Seal area, 5... Notch, 6...
...Part of the pull tab.

Claims (1)

[Scope of utility model registration request] In a container lid formed by sealing a pull tab 3 made of plastic film, metal foil, or a laminate thereof larger than the extraction opening 1 onto a lid 2 having an opening 1 for taking out the contents, the inside of the sealing area 4 of the pull tab 3 is sealed. A lid for a container that makes it obvious that it has been opened, characterized in that a notch 5 is provided at an appropriate position.