JPH0594143U - Resin cap for prizes - Google Patents

Abstract

(57) [Summary] [Purpose] It is not necessary to provide a weakening line for stripping the central part of the liner, and the cap has excellent sealing performance after re-sealing, and is excellent in productivity and workability. A cap comprising a resin cap shell, a printing ink layer provided on the inner surface of the cap, and a releasable resin liner provided so as to cover the printing ink layer, wherein the top surface of the resin cap shell An annular protrusion is provided on the inner surface at a portion corresponding to the tip of the container mouth to be applied.

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 is excellent in productivity and workability as well as having excellent sealing performance of the cap after peeling off the liner.

[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 after opening the cap, the liner can be removed from the cap shell and consumers can enjoy viewing the markings printed on the inner surface of 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 projection is provided inside the cap. When this projection is pulled, the weakening line is broken and only the part surrounded by the weakening line is peeled off from the cap shell. It is said that it is carried out (Japanese Utility Model Publication No. 60-75247, etc.).

[0004]

[Problems to be solved by the device]

 Generally, a liner is formed by pouring a 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 order to provide the weakening line on the liner in the former method, it is necessary to provide the weakening line forming projection on the liner molding die and reduce only the liner thickness at that portion, and in the latter method, the resin sheet It is necessary to engrave the weakening line on the line, and in any method there is a problem that the liner molding process is more complicated than the one without the weakening line. There was also a problem that the workability of the tool was inferior because it was necessary to provide the protrusions.

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 becomes extremely bad at that portion, and there is a problem that the productivity of the liner decreases. 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 the container even 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, in a cap including a resin cap shell, a printing ink layer provided on the inner surface of the cap, and a resin liner provided so as to cover the printing ink layer, the ceiling of the resin cap shell is provided. Provided on the in-plane surface is a cap characterized in that an annular protrusion is provided at a portion corresponding to the tip of the container mouth to be applied.

[0007]

【Example】

 The cap of the present invention will be described with reference to the accompanying drawings. In FIG. 1 showing an example of a cap of the present invention, a cap generally designated by 1 is a cap shell 4 composed of a top plate 2 and a skirt 3 hanging from the top plate, an annular projection 5 on the inner surface of the top plate, and an annular projection. A printing layer 6 is provided in the central portion of the inner top plate portion. A releasable liner 7 is provided on the entire surface of the cap shell top plate so as to cover the annular projection 5 and the printed layer 6. In addition, a knob 8 that serves as a clue for peeling the liner is formed integrally with the liner at the center of the liner 7.

As shown in FIG. 1, before the liner is peeled off, the container is kept hermetic by the presence of the liner interposed between the cap shell and the container opening. Further, when the cap with the liner peeled off is opened again after the cap is opened, the annular projection 5 provided on the cap shell may contact the tip of the container mouth 9 as shown in FIG. 2 to maintain the hermeticity. You can do it.

For example, as shown in FIG. 1, the annular projection provided on the cap shell is made to have a rounded (or slanted) end of the container mouth, and becomes thinner toward the tip, or has a flat tip. It can be changed appropriately depending on the shape of the container mouth to be applied.

For forming the liner, all conventionally known methods can be adopted. For example, a method of supplying a resin composition for forming a liner in a molten state into a cap and performing pressure molding using a cooled mold, or It is possible to adopt a method in which a die-cut resin sheet is inserted into the shape of the inner surface of the cap shell and heat-bonded.

Further, since the cap of the present invention peels off the entire surface of the liner, it is not necessary for the liner to have a certain thickness, and a seal between the cap shell and the container mouth part is required to enhance the hermeticity. In the portion, it may be provided thicker than the center of the top plate portion. In such a case, even if the cap shell is provided with a relatively large annular projection, it does not hinder the flow of the molten resin during the molding of the liner, which is advantageous.

The resin forming the liner is preferably opaque so as to conceal the printing of prize marks and the like, but is not limited thereto, but includes low density polyethylene, ethylene-vinyl acetate copolymer, styrene-butadiene rubber, etc. Can be made of any elastic polymer such as synthetic rubber, soft vinyl chloride or the like, or a blend of two or more thereof.

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. In the present invention, when the liner is torn off and then closed, it is necessary for the container opening to abut on the annular projection provided on the cap shell, and the cap is closed deeper than it was before the liner was peeled off. A screw cap that can be used is particularly preferably used. Further, in the cap of the present invention, 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 secure the sealing property of a container even when the liner is peeled off and then the plug is closed without providing a weakening line on the liner. Furthermore, since the liner is not provided with a weakening line for peeling off the central part, the liner can be easily formed, and the workability and productivity are excellent.

[Brief description of drawings]

FIG. 1 is a diagram showing a state before a liner is peeled off of an example of a cap of the present invention.

FIG. 2 is a view showing a state in which the cap of FIG. 1 is closed after the liner is peeled off.

[Explanation of sign]

 1 Cap 4 Cap Shell 5 Annular Protrusion 6 Printing Layer 7 Liner 8 Knob 9 Container Mouth

Claims (2)

[Scope of utility model registration request] 1. A cap comprising a resin cap shell, a printing ink layer applied to the inner surface of the cap, and a releasable resin liner applied so as to cover the printing ink layer. A cap, wherein an inner surface of the top surface is provided with an annular projection at a portion corresponding to the tip of the container mouth to be applied. 2. The cap according to claim 1, wherein the resin cap shell is a screw cap having a screw thread on the inner surface of the skirt portion.