JPH0748542Y2 - Cap with display - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cap with a display used for sales promotion and the like, and particularly a cap with a display suitable for use when the cap body is made of synthetic resin. It is about.

[Conventional technology]

Although a cap with a display is used for sales promotion, in the cap with a display provided conventionally, as shown in FIG. 5 and FIG. See No. 59-98295).

The main body 1 of the cap is formed by a top plate portion 2 and a tubular portion 3 that hangs from the peripheral edge thereof. A disc-shaped liner 4 is fused to the inner surface of the top plate portion 2 of the cap body 1. A hidden display is provided between the central portion 4a of the liner 4 and the top plate portion 2 (hereinafter, this portion is referred to as a hidden display portion 5). And the liner 4 has a hidden display 5
A weakening line 6 is formed to partition the central portion 4a that covers the outer peripheral portion 4b and the outer peripheral portion 4b that seals the bottle mouth.

As shown in FIG. 7, the cap body 1 is manufactured by press-molding a metal plate 10 on which multiple layers of printing are applied. First, the base coat layer 10a is printed on the entire surface of the metal plate 10. A non-adhesive layer 10b is printed on the base coat layer 10a at a position corresponding to the central portion 4a of the liner 4, and then a release coat layer 10c is printed on the entire surface so as to cover the non-adhesive layer 10b. There is. The release coat layer 10c and the non-adhesive layer 10b are formed of materials having weak adhesive strength to each other, and an easily peelable interface 9 is formed between these layers 10c and 10b. Then, a display mark 12 such as contact failure is printed on a portion of the release coat layer 10c which covers the non-adhesive layer 10b. Furthermore, this release coat layer 10c
An adhesive coating layer 10d, which is easily fused with the liner 4, is printed on the entire surface.

In order to manufacture the cap with the hidden display, various patterns are printed on the metal plate 10, the metal plate is press-molded to form the cap body 1, and then the synthetic resin in a molten state is formed in the cap body 1. Is charged and press-formed to form the liner 4.

In this cap with hidden display, when the projection 11 formed in the center of the liner 4 is pulled, the weakening line 6 is cut and the easily peelable interface 9 is peeled off. Therefore, the central portion of the liner 4 surrounded by the weakening line 6 is cut off. Only 4a can be stripped off.
Then, the hidden display mark 12 provided on the hidden display portion 5 can be confirmed.

[Problems to be solved by the device]

When the cap body 1 is made of metal as in the conventional cap, the non-adhesive layer 10b, the display marks 12 and the like are pattern-printed on the metal plate 10 formed on the cap body 1 in a flat plate shape. As a result, we were able to mass-produce caps with display marks at a profitable speed.

However, in the cap shown in FIG. 8 in which the cap body 13 is made of synthetic resin, the synthetic resin in a molten state is immediately molded into the shape of the cap body 13. Therefore, if an indication mark is to be provided by a printing method as in the case of the conventional metal cap body 1, the indication mark 12, the non-adhesive layer 10b, etc. must be printed on the inner surface of the top plate portion in the cap body 13. I have to. However, it is difficult to perform such inner surface printing at a mass production rate of caps. For this reason,
Conventionally, there has been a problem that a cap with a display made of a synthetic resin cap body 13 cannot be mass-produced.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a cap with a display that can be mass-produced even if the cap body is made of synthetic resin.

[Means for Solving the Problems]

The cap with a display of the present invention forms a display with a concave shape or a convex shape on the surface of the synthetic resin liner disposed on the inner surface of the top plate portion of the cap body, which is opposite to the top plate portion,
In addition, a large number of auxiliary locking projections having a head with an enlarged diameter are provided on the outer peripheral portion of the weakening line on the inner surface of the top plate of the cap body, and the outer peripheral portion of the weakening line of the liner is secured by these auxiliary locking projections. It is fixed to the cap body with strength that does not peel off.

[Action]

Since the cap with the indication has the indication of the concave or convex shape on the surface of the liner opposite to the top plate portion, the indication mark can be put at the same time when the liner is molded.

〔Example〕

The cap with display of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of the cap of the present invention. This cap is composed of a cap body 21 and a liner 22.

The cap body 21 is made of polypropylene. The cap 21 is composed of a top plate portion 23 and a tubular portion 24 that hangs down from the peripheral edge thereof. A screw is provided on the inner surface of the tubular portion 24.
25 are formed. In addition, a bridge is
A pill fur proof ring 28 having wings 27 through 26 is formed.

A liner holding rib 29 projecting radially inward is formed on the inner surface of the upper portion of the cylindrical portion 24 of the cap body 21 over the entire circumference. On the lower surface side of the liner holding rib 29, the tubular portion 24
Triangular ribs 30 ... that are connected to the inner surface of the are provided. Further, main locking projections 32 ... Are provided on the side of the top plate portion 23 of the recess 31 formed between the liner holding rib 29 and the top plate portion 23. Further, on the inner surface of the top plate portion 23, as shown in FIG. 2 and FIG. 3, small-diameter auxiliary locking projections 34 ... Stand upright.
The auxiliary locking projection 34 is provided with a weakening line 33 of the liner 22 described later.
And the part that abuts the bottle mouth, and its head is crushed.

The liner 22 is made of polyethylene that is difficult to be fused with the polypropylene that forms the cap body 21. The liner 22 is formed by in-shell mode molding. The liner 22 is formed with a weakening line 33 that divides the outer peripheral portion 22b for sealing the bottle mouth from the central portion 22a. The weakening line 33 is formed by thinning the liner 22, and a small convex portion 35 for catching a claw is formed on the surface of the central portion 22a near the weakening line.

The outer peripheral portion 22b of the liner 22 is engaged with the auxiliary locking protrusion 34 and the main locking protrusion 32 of the cap body 21, whereby the outer peripheral portion 22b of the liner 22 is cut when the weakening line 33 is cut. It is locked and fixed to the cap body 21 with such strength that it is not separated from the cap body 21 by the applied force.

On the inner surface of the weakening line 33, when forming the liner, a mark 36 such as a concave or convex contact loss formed by press molding is attached at the same time.

Next, a method for manufacturing this cap will be described.

To manufacture this cap, first, a polypropylene resin is molded by compression molding or the like to form the cap body 21.
At this point, the auxiliary locking protrusion 34 of the cap body 21 is
As shown in the figure, the head is formed in a non-crushed state. Further, the length of the auxiliary locking projection 34 in this state is set larger than the thickness dimension of the liner 22.

Then, in this way, the molten polyethylene resin is put into the molded cap body 21 and pressed by the mold. Then, the resin flows and the liner 22 having the weakening line 33 is molded in a state of being locked to the main locking protrusion 32. At this time, at the same time, the head of the auxiliary locking projection 34 is crushed by being pressed in a softened state by the heat of the introduced polyethylene, so that the auxiliary locking projection 34 is locked to the liner 22. . At the same time, the indentation or the like due to the concave or convex shape is formed inside the weakening line 33 of the liner 22.

Next, an operation for confirming the display mark 36 of the cap will be described.

To confirm the display mark 36 on the cap, first, the cap is opened. The liner of this removed cap
22 A display mark 36 such as a hit or miss is formed on the central portion 22a.

At this time, if there is a hit display, the small convex portion 35 is raised with a nail. Then, the weakening line 33 is cut and the liner central portion 22a is easily peeled off. At this time, the outer peripheral portion 22b is attached to the cap body 21 by the main locking projections 32 and the auxiliary locking projections 34.
Since it is locked to the liner, the liner central portion 22a having the concave or concave display mark 36 is separated from the cap.

In this way, this cap with indication can be seen immediately by opening it, and the indication part can be easily separated from the cap.For example, collecting only hits, putting a lot of hit marks in the envelope, You can mail it to the prize provider in the same manner as.

Although the cap described above is a cap made of synthetic resin, it can be similarly used for a metal cap.

Although the cap of the present invention has been described as peeling off the central part of the liner, the display can be seen immediately when the cap is opened.Therefore, the liner is molded without taking measures to peel off the cap body. It is also possible to make a display such as a hit or miss by providing a concave or convex display. In this case, in order to mail the hit cap, the cap that has been opened must be mailed as it is, so there is a drawback that the bulk becomes large, but the manufacturing cost of the cap can be significantly reduced.

[Effect of device]

As described above, since the display mark according to the present invention is marked at the same time when the molten resin is pressed to form the liner, the mass production is excellent and the cap with a display can be obtained at a low cost. .

[Brief description of drawings]

1 to 4 are views showing a cap according to the present invention. FIG. 1 is a longitudinal sectional view of part 1, FIG. 2 is a view taken along the line II-II of FIG. 1, and FIG. 3 is a cap body. FIG. 4 is a vertical cross-sectional view showing the top plate part and the liner attached to the top plate part, FIG. 4 is a vertical cross-sectional view near the top plate part of the cap body, and FIG. 5 is a partial vertical cross-sectional view of a conventional metal cap with a hidden display. , Fig. 6 is VI-VI of Fig. 5.
FIG. 7 is a vertical sectional view showing the structure of a conventional hidden display, and FIG. 8 is a partial vertical sectional view of a conventional synthetic resin cap. 21 …… Cap body, 22 …… Liner, 23 …… Top plate,
24 …… Cylinder part.

Claims (1)

[Scope of utility model registration request] 1. A cap main body having a cylindrical part hanging from a peripheral edge of a top plate part, and a synthetic resin liner disposed on an inner surface of the top plate part of the cap main body, and the outer periphery of the liner. A hidden cap with a weakening line formed between the central part and the central part, wherein the surface of the synthetic resin liner disposed on the inner surface of the top plate of the cap body is opposite to the top plate part. In addition, a display is formed by a concave shape or a convex shape, and a large number of auxiliary locking projections having an enlarged head are disposed on the outer peripheral portion of the weakening line on the inner surface of the top plate portion of the cap body. A cap with a display, characterized in that the auxiliary locking projection fixes the outer peripheral portion of the weakened line of the liner to the cap body with a strength that does not peel off.