JPH0594144U - Resin cap for prizes - Google Patents

Abstract

(57) [Summary] [Purpose] The cap has excellent sealing performance after re-sealing, and has a simple structure with excellent productivity and workability. [Structure] A resin cap shell having an inner ring on the inner surface of the top plate portion, a printing ink layer applied to the inner surface of the cap shell top plate portion, and a releasable resin liner applied to cover the printing ink layer. In the cap, a releasable liner is provided in the central portion of the inner surface of the top plate section defined by the inner ring, and the inner ring has a protrusion facing inward so as to hold the liner at the tip.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a prize-winning resin cap, and more particularly to a prize-winning resin cap that has excellent capping sealing property even after the liner is peeled off, as well as excellent productivity and processability.

[0002]

[Prior Art]

 Traditionally, for the purpose of enhancing and promoting the advertising and sales effects of bottled products, the display marks such as “win”, “miss”, and other characters, symbols, and figures of the prizes have been printed on the inner surface of the top surface of the cap shell. Caps are used, and consumers can enjoy viewing the inscription printed on the inner surface of the cap by removing the liner from the cap shell after opening the cap. In such caps, the liner is removed from the cap shell after opening, so the cap after the liner is removed is inferior in sealing the container, and this type of cap is not suitable for recapping. There wasn't. Therefore, it is desired that the cap can maintain the sealing property even after the liner is peeled off.

In order to maintain the hermeticity of the cap after the liner is peeled off, the liner of the sealing part which holds the hermeticity of the cap of the liner and abuts the container mouth is left in the cap shell, There is a type of prize cap that peels off the liner on the printed part (center part, etc.). In this cap, the part of the liner to be removed is surrounded by a weakening line (score), and a protrusion is provided inside the cap. When this protrusion is pulled, the weakening line is broken and only the part surrounded by the weakening line is separated from the cap shell. It is torn off (Japanese Utility Model Laid-Open No. 60-75247, etc.).

[0004]

[Problems to be solved by the device]

 Generally, a liner is formed by pouring molten resin into a cap shell and pressing it, or by inserting a resin sheet corresponding to the inner surface of the top plate into the cap shell and thermally bonding it. ing. In the former method, in order to provide the weakening line on the liner, it is necessary to provide the liner molding die with a weakening line forming projection, and in the latter method, it is necessary to engrave the weakening line on the resin sheet. However, both methods have the problem that the liner forming process is more complicated than the case where the weakening line is not provided, and the liner forming tool must be provided with a projection for weakening line forming. It also had the problem of being inferior in sex.

Further, in the former method, the molten resin is applied to the central portion of the cap shell, and the molten resin is spread thinly on the entire inner surface of the top plate of the cap shell while impressing this. If the protrusions corresponding to the above are provided, the flow of the resin is deteriorated at that portion, so that there is a problem that the productivity of the liner is reduced. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cap for a prize-winning cap that can maintain the hermeticity of a container after the liner is peeled off without providing a weakening line for peeling off the central portion of the liner.

[0006]

[Means for Solving the Problems]

 According to the present invention, a resin cap shell having an inner ring that contacts the inner surface of the container mouth on the inner surface of the top plate, a printing ink layer applied on the inner surface of the top plate of the cap shell, and the printing ink layer are covered. In a cap consisting of a peelable resin liner provided, a peelable liner is provided at the center of the inner surface of the top plate section defined by the inner ring, and the inner ring has an inner side to hold the liner. There is provided a cap having a protrusion facing toward.

[0007]

【Example】

 The cap of the present invention will be described with reference to the accompanying drawings. In FIG. 1 showing an example of the cap of the present invention, a cap generally designated by 1 is a cap shell 4 composed of a top plate portion 2 and a skirt portion 3 depending from the top plate portion, an inner ring 5 provided on the inner surface of the top plate portion, an inner member. A printing layer 7 is provided on the liner holding projection 6 provided on the inner side of the ring 5 and on the central portion of the top plate section defined by the inner ring. A peelable liner 8 is provided in the center of the top plate of the cap shell so as to cover the printed layer 7. In addition, a knob 9 that serves as a clue for peeling the liner is formed integrally with the liner at the center of the liner 8. The inner ring 5 is an annular protrusion having an outer diameter corresponding to the inner diameter of the container opening, and as shown in FIG. 1, the inner ring 5 is fitted inside the container opening when the container is closed, so that the container is sealed. It becomes possible to secure.

Generally, in a prize cap, since the liner is adhered so as to be easily peeled off, the liner is formed on the entire top plate of the cap and is supported between the container mouth and the cap shell. However, the cap of the present invention has a protrusion on the inner ring that protrudes inward so as to hold the liner. The liner cannot be removed without pulling.

The shape of the protrusions provided on the inner ring is not limited to that shown in FIG. 1, and for example, a shape in which the inner ring itself increases in thickness as it goes to the tip without forming a special protrusion, Any shape can be adopted as long as the tip of the inner ring can support the liner.

Since the inner ring has a protrusion such as an undercut, the liner is formed by supplying the resin composition for forming the liner in a molten state into the cap and press-molding using a cooled mold. By adopting the method described above, molding can be advantageously carried out. The resin forming the liner is preferably opaque so as to conceal the printing of prize marks and the like, but is not limited to this, and synthetic rubber such as low-density polyethylene, ethylene-vinyl acetate copolymer, styrene-butadiene rubber, etc. , Flexible vinyl chloride, or any other elastic polymer or a blend of two or more thereof.

In the cap of the present invention, the liner is used for the purpose of concealing the printed display, and therefore, unlike the conventional prize cap, it is not necessary to consider the sealing property as the performance of the liner. It is also possible to select from a wide range of materials. For example, when the present invention is applied to a resin container for filling contents that need to be filled with heat or heat, a liner can be formed by selecting a hard or heat-resistant resin. By doing so, it is possible to prevent the inward change of the container mouth portion with time, and further improve the sealing performance.

In the cap of the present invention, not only the inner ring but also the sealing portion between the tip of the container mouth and the cap can be improved in sealing performance. In other words, the seal between the tip of the mouth of the container and the cap does not change itself even after the liner is peeled off after opening, so that good sealing performance can be maintained even after re-sealing. .. Further, although it is not necessary to provide a liner at this seal portion, it is of course possible to provide an annular liner on the cap shell to obtain a higher sealing performance.

The printing layer may be of any type such as a type that remains on the top plate of the cap shell or a type that is transferred to a liner and peeled off together with the liner.

The cap shell can be formed by injection molding, compression molding, or the like of a synthetic resin such as, but not limited to, polypropylene or polyethylene. It can also be applied to caps other than the screw cap shown in FIG. In the case of a screw cap, it is of course possible to provide a tamper-evidence band below the cap shell skirt portion, which can also provide the cap with a tamper evident function.

[0015]

[Effect of the device]

 According to the present invention, it is possible to peel off only the liner where the prize mark or the like is printed without providing a weakening line on the liner, and the liner is held by the protrusion provided on the inner ring. Therefore, there is an advantage that there is no possibility of falling off unless the peeling is intended. Furthermore, since the liner is not provided with a weakening line for peeling off the central part, it is easy to form the liner and has excellent workability and productivity.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a cap of the present invention.

[Explanation of sign]

 1 Cap 4 Cap Shell 5 Inner Ring 6 Liner Retaining Protrusion 7 Printing Layer 8 Liner 9 Knob

Claims (1)

[Scope of utility model registration request] 1. A resin cap shell having an inner ring on the inner surface of the top plate portion, a printing ink layer applied on the inner surface of the cap shell top plate portion, and a peelable resin liner applied so as to cover the printing ink layer. In the cap consisting of, a peelable liner is provided in the central portion of the inner surface of the top plate section defined by the inner ring, and the inner ring has a protrusion facing inward so as to hold the liner. And cap.