JPH0231405Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention provides a container lid having a liner that is partially peelable and removable, and more specifically, a shell having a top wall and a skirt wall depending from the periphery of the top wall. and a liner applied to the inner surface of the top wall of the shell, and a container lid having a so-called prize characteristic in which a part of the liner can be peeled off and removed from the shell.

<Prior art> Recently, in the beverage manufacturing and sales industry,
BACKGROUND ART In order to promote sales, lids of containers for beverages and the like are often provided with so-called prize features. And, as a container lid with prize characteristics,
As disclosed in JP-A-55-29467, JP-A-54-97188, and JP-A-56-113552, a shell having a top wall and a skirt wall hanging from the periphery of the top wall; and a liner applied to the inner surface of the top wall of the shell, the liner having an endless breaking line formed therein, and the liner having a peeling removal portion defined inside the breaking line and the breaking line. Container lids of the type are advantageously used which are defined by a residual seal on the outside.

In this type of container lid, after the container is opened (that is, after the lid that is sealed in the mouth of the container is removed from the container), the peel-off portion of the liner is peeled off and removed from the shell. The display appearing on the central part of the inner surface of the top wall of the shell, which is exposed by the shell, or the peeled surface of the peeled-off part, or the peeled-off part itself is used for prize purposes. On the other hand, the remaining seal portion of the liner continues to remain there without being peeled off from the inner surface of the top wall of the shell, and when the lid is reattached to the mouth of the container where the contents remain, the container Close the mouth and reseal.

In the container lid of the above type, it is important that the peeled-off portion of the liner is sufficiently easily peeled off from the shell after opening, and that the remaining seal portion of the liner is sufficiently removed without being peeled off from the shell. It is important to ensure that it continues to be maintained in Ciel. Therefore, in conventional container lids,
The peeled and removed portion of the liner was made to be weakly adhesive or non-adhesive to the inner surface of the top wall of the shell, and the remaining sealed portion of the liner was made to be strongly adhered to the inner surface of the top wall of the shell.

<Problems to be Solved> However, the conventional container lid as described above has the following problems to be solved. That is, in particular, when sealingly attaching the lid to the container mouth, the shoulder of the shell (i.e., the boundary between the top wall and the skirt wall) is pressed and deformed, and thereby the remaining seal portion of the liner is tightly attached to the container mouth. A container lid of the type known as a flavor lock by those skilled in the art, which is tightly attached to the lid, has sufficient sealing performance to prevent the lid from being attached diagonally, as suggested for example in Japanese Utility Model Publication No. 18517/1983. In order to obtain this, it is desirable to allow the residual seal portion of the liner to move appropriately relative to the inner surface of the top wall of the shell. In order to satisfy such demands, it is necessary to make the residual seal portion of the liner weakly adhered to or non-adhered to the inner surface of the top wall of the shell. However, this requirement is based on the above-mentioned requirement that the residual seal portion of the liner be strongly adhered to the inner surface of the top wall of the shell in order to maintain the residual seal portion of the liner in the shell sufficiently without being peeled off and removed from the shell. This is in conflict with the requirements set forth above.

<Purpose of the invention> The present invention has been made in view of the above facts, and its main purpose is to create a new and innovative product that skillfully solves the above-mentioned problems that exist in conventional container lids and which at first glance seem to be unsolvable. To provide an excellent container lid.

<Summary of the invention> As a result of intensive research, the inventors of the present invention discovered that, instead of making the entire area of the residual seal part of the liner strongly adhere to the inner surface of the top wall of the shell, a part of the residual seal part Surprisingly, when the remaining seal portion, including at least the annular outer periphery, is made to be in a weakly bonded state or non-adhered state to the inner surface of the top wall, it is surprisingly possible to It is possible to ensure that the seal part is maintained on the shell sufficiently without being peeled off and removed from the shell, and the remaining seal part, especially its outer periphery, moves appropriately with respect to the shell, thus preventing the so-called lid from being removed. It has been found that it is possible to prevent oblique mounting and obtain sufficient sealing performance.

That is, according to the present invention, a shell having a top wall and a skirt wall hanging from the periphery of the top wall;
a liner provided on the inner surface of the top wall of the shell, an endless breaking line is formed on the liner, and a peeling removal section defined inside the breaking line and a liner formed on the inside of the breaking line. and a residual seal portion defined on the outside, and the peel-off portion includes a partially peelable liner that is weakly adhered to or non-adhered to the inner surface of the top wall of the shell. In the container lid, the residual seal portion is formed into a weakly adhesive or non-adhesive region that is weakly adhesive or non-adhesive to the inner surface of the top wall, and a strongly adhesive region that is strongly adhesive to the inner surface of the top wall. There is provided a container lid characterized in that the weakly adhesive or non-adhesive region is present at least on the annular outer periphery of the residual seal portion.

<Preferred Specific Examples of the Present Invention> Hereinafter, preferred specific examples of the container lid constructed according to the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, the illustrated container closure is comprised of a shell, generally designated 2, and a liner, generally designated 4. ciel 2
may be of any form, such as a so-called roll-on type, press-crew type, lug type, or crown type. (In FIG. 1, only the top wall 6 and the upper part of the skirt wall 8 are shown, and the lower part of the skirt wall 8 is omitted.) Kayou Ciel 2
can be formed by applying a required layer as described below to a thin metal plate such as an aluminum-based alloy plate, a tinplate plate, or a chromium-treated steel plate, and then applying press working. If desired, the shell 2 can be formed from a suitable synthetic resin such as polypropylene or polyethylene by injection molding, compression molding, or the like. On the other hand, the liner 4 is made of a suitable synthetic resin such as polyvinyl chloride, polyethylene or polypropylene by a well-known method (for example, Japanese Patent Publication No. 40-13156, Japanese Patent Publication No. 41-5588).
Publication No., Special Publication No. 5706, Special Publication No. 1977-
19886, JP-A-49-105689, US Patent No. 3135019 specification and drawings, US Patent No.
3,212,131 and US Pat. No. 3,278,985) on the inside of the top wall 6 of the shell 2.

Referring to FIG. 2 together with FIG. 1, the liner 4 may have a continuous cutting line cut completely continuously or a so-called perforation where slits are formed at intervals. The liner 4 is provided with an endless break line 10, preferably a score formed by
It is divided into a peel-off section 12 defined inside the break line 10 and a residual seal section 14 defined outside the endless break line 10. In the illustrated example, the endless break line 10 is circular, so the peel-off section 12 is disk-shaped and the residual seal section 14 is annular disk-shaped. If desired, the endless break line 10 can be shaped like an ellipse, a polygon, or the like.

In the illustrated embodiment, the residual seal portion 14 of the liner 4 has an annular ridge 16 located at its inner peripheral edge and a flat plate portion 18 having a substantially flat surface (lower surface). The annular protrusion 16 is inserted into a container mouth (not shown), and the flat plate portion 18 is brought into close contact with the top surface of the container mouth. On the other hand, liner 4
The peeling removal section 12 has a relatively thin flat plate shape as a whole. Further, an approximately U-shaped additional break line 22 that defines the tongue-shaped tab 20 is formed in the peel-off portion 12 . Advantageously, this additional break line 22, like the endless break line 22 described above, also consists of a score formed by reducing the wall thickness of the material. One end of the additional breaking line 22 is spaced radially inward from the endless breaking line 10, while the other end is connected to the endless breaking line 10. A substantially U-shaped reinforcing rib 23 is formed adjacent to the one end of the additional breaking line 22 . Further, a knob 24 that projects downward is provided at the radially inner end of the tongue-shaped tab 20, ie, at the center of the peel-off section 12.

Continuing the explanation with reference to FIG. 1, in the illustrated embodiment, the outer and inner surfaces of the shell 2 are coated with anti-corrosion protective paint layers 26 and 28, respectively. Such protective paint layers 26 and 28
may be a known paint such as a phenol-epoxy paint, an epoxy-urea paint or an epoxy-melamine paint. On the protective paint layer 28 applied to the inner surface of the shell 2, a strong adhesive lacquer or ink layer 30 is applied. Such a strong adhesive lacquer or ink layer 30 may be made mainly of oxidized polyethylene as disclosed in British Patent No. 1484209 when the liner 4 is made of polyethylene, or when the liner 4 is made of polyvinyl chloride. In some cases, a material mainly composed of vinyl chloride-vinyl acetate copolymer and acrylic resin may be used.

Referring to FIG. 3 as well as FIG. 1, on the strong adhesion lacquer or ink layer 30, weak adhesion or non-adhesion lacquer or ink layers 32 and 34 are selectively applied in required areas. There is. Such weak adhesion or non-adhesion lacquer or ink layer 32
and 34, for example, if the liner 4 is made of polyethylene, it may contain a mixture of other compatible resins with a low blending ratio of polyethylene oxide, an epoxy-phenol resin, an epoxy-urea resin, or an alkyd resin. When the liner 4 is made of polyvinyl chloride, it may be made mainly of epoxy-phenol resin, epoxy-urea resin, or alkyd resin. As can be easily understood by referring to FIG. 3, in which the areas where the weak adhesion to non-adhesion lacquer or ink layers 32 and 34 are applied are cross-hatched, the weak adhesion to non-adhesion The lacquer or ink layer 32 is present over the entire area of the peel-off portion 12 in the liner 4. On the other hand, it is important that the weak adhesive or non-adhesive lacquer or ink layer 34 be present at least on the annular outer periphery of the residual seal portion 14 in the liner 4. It exists in the entire area of the residual seal portion 14 except for the annular inner peripheral portion 36 (more specifically, it extends to a region somewhat outside the outer peripheral edge of the residual seal portion 14 in the radial direction).

In the container lid as described above, due to the presence of the weakly adhesive or non-adhesive lubrication layer or ink layer 32, the peel-off portion 12 of the liner 4 is weakly adhesive or non-adhesive to the inner surface of the top wall 6 of the shell 2. It is in a non-adhesive state. On the other hand, the remaining seal portion 14 of the liner 4
The strong adhesive region 38 (FIG. 1) is strongly adhesive to the inner surface of the top wall 6 of the shell 2, and the weakly adhesive region 38 (FIG. 1) is weakly adhesive to non-adhered to the inner surface of the top wall 6 of the shell 2. It has a non-adhesive area 40 (FIG. 1). That is, in the annular inner peripheral portion 36 of the residual seal portion 14 of the liner 4, there is no weak adhesion or non-adhesion lacquer or ink layer, and the liner 4 is brought into direct contact with the strong adhesion lacquer or ink layer 30. Therefore, it is strongly adhered to the inner surface of the top wall 6 of the shell 2. On the other hand, the annular inner peripheral portion 3 in the residual seal portion 14 of the liner 4
The portions other than 6 are weakly adhesive or non-adhesive to the inner surface of the top wall 6 of the shell 2 due to the presence of the weakly adhesive or non-adhesive lacquer or ink layer 34 .

4 to 6 show modified examples of the division of the residual seal portion 14 of the liner 4 into strongly bonded regions and weakly bonded or non-bonded regions. In the modification shown in FIG. 4, in addition to the annular inner circumferential portion 36 in the residual seal portion 14, a plurality of substantially triangular triangles protrude radially outward from the annular inner circumferential portion 36 at intervals in the circumferential direction. Even in the shaped protrusion 42, there is no weak adhesive or non-adhesive lacquer or ink layer, and the protrusion 42 is also a strong adhesive area.
In the modification illustrated in FIG. 5, in addition to the annular inner circumferential portion 36 of the residual seal portion 14, there are a plurality of grooves located radially outwardly from the annular inner circumferential portion 36 and at intervals in the circumferential direction. small circular parts 44
Also, there is no lacquer or ink layer for weak adhesion or non-adhesion, and this small portion 44 is also a strong adhesion area. In the modification shown in FIG.
In addition, there is no weak adhesive or non-adhesive lacquer or ink layer in both the plurality of protrusions 42 and the plurality of small parts 44; This is a strong adhesive area.

The liner 4 is placed against the inner surface of the top wall 6 of the shell 2.
In order to make the required areas weakly bonded or non-bonded and the remaining areas strongly bonded, instead of employing the method described above in the illustrated example, the method described in Japanese Patent Application Laid-Open No. 53-101463 is used. Publication, Unexamined Japanese Patent Publication 1973-
Various other methods can also be adopted, as disclosed in Japanese Patent Application Laid-open No. 97188 and Japanese Patent Application Laid-open No. 113552/1983. For example, in the illustrated example, in the weakly bonded or non-adhesive areas, the weakly bonded or non-adhesive lacquer or ink layers 32 and 34 are entirely covered.
In the strong adhesion area, no lacquer or ink layer for weak adhesion or non-adhesion is applied, but if desired, the lacquer or ink layer for weak adhesion or non-adhesion is coated with relatively high density halftone dots. It is also possible to apply the highly adhesive or non-adhesive lacquer or ink layer in the form of relatively low density dots.
In addition, completely contrary to the case of the illustrated example, a lacquer or ink layer for weak adhesion or non-adhesion is applied to the entire inner surface of the top wall 6 of the shell 2, and in the strong adhesion area, the weak adhesion or non-adhesion is applied. A strong adhesive lacquer or ink layer can also be applied on top of the lacquer or ink layer. Furthermore, in the weak adhesion to non-adhesion areas, the strong adhesion lacquer or ink layer 30
On top is a lacquer or ink layer 3 for weak adhesion or non-adhesion.
2 and 34, the above-mentioned JP-A-55-
As disclosed in Japanese Patent No. 71275, a distribution control layer may be provided below the strong adhesive lacquer or ink layer 30 to reduce the adhesive properties of the surface of the strong adhesive lacquer or ink layer 30.

After the container lid as described above has been removed from the container mouth, in order to peel off the peeling removal section 12 of the liner 4 from the shell 2, first put your finger on the knob 24 and move it to the left in FIG. Pushed towards the side,
As a result, the additional breaking line 22 is broken and the tongue-like tab 20 is turned up, and then the turned-up tongue-like tab 20 is picked up with fingers and pulled, thereby cutting the endless breaking line 10 into the additional breaking line 10. Following the break line 22, the parts are sequentially broken, thus peeling and removing the entire peel-off portion 12 from the shell 2. On the inner surface of the top wall 6 of the shell 2, which is exposed when the peeling removal part 12 is removed, an appropriate display used for prizes can be printed. Further, if desired, an indication printed on the inner surface of the top wall 6 of the shell 2 may be displayed when the peel-off portion 12 of the liner 4 is peeled off from the shell 2. It is also possible to transfer it to the surface that was in contact with the inner surface of the top wall 6. To do this, for example, U.S. Pat.
No. 3257021, No. 3361281, No. 3581690, No.
Techniques such as those disclosed in the specification and drawings of No. 3633781 may be used.

<Operation and effect of the invention> In the container lid constructed according to the invention,
A region 40 of the residual seal portion 14 of the liner 4, including at least the annular outer circumferential portion, is connected to the top wall 6 of the shell 2.
Therefore, when the container lid is attached to the container opening, the weakly bonded or non-adhered region 40 of the residual seal portion 14 of the liner 4 is attached to the top wall of the shell 2. It can be moved as necessary with respect to the inner surface of the lid 6, and thus it is possible to sufficiently reliably prevent so-called oblique attachment of the lid and to obtain sufficient sealing performance.

Further, the peeling removal portion 12 of the liner 4 is removed from the shell 2.
Since the liner 4 is weakly adhered or non-adhered to the inner surface of the top wall 6 of the shell 2, after the container lid is removed from the container mouth, the peeling and removal portion 12 of the liner 4 can be removed from the shell 2 without using any special equipment. Can be easily peeled off and removed.

Furthermore, since the residual seal portion 14 of the liner 4 includes a strongly adhesive region 38 that is strongly adhered to the inner surface of the top wall 6 of the shell 2, it is difficult to peel off and remove the peel-off portion 12 of the liner 4. Even after removal, the residual seal 14 of the liner 4 continues to remain there without being peeled off from the inner surface of the top wall 6 of the shell 2, and therefore, when the container lid is reattached to the container mouth, the liner 4 remains there. The remaining seal portion 14 is brought into close contact with the mouth of the container to reseal it.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing a specific example of a container lid constructed according to the present invention. 2 is a simplified bottom view of the container lid of FIG. 1; FIG. FIG. 3 is a simplified diagram showing a portion of the container lid shown in FIG. 1 where a weak adhesion or non-adhesion lacquer or ink layer is present. FIG. 4, FIG. 5, and FIG. 6 are simplified diagrams showing modifications of the portion where the weak adhesion or non-adhesion lacquer or ink layer is present. 2... Shell, 4... Liner, 6... Top wall, 8... Skirt wall, 10... Endless breaking line, 12... Peeling removal part, 14... Remaining seal part, 26 and 28... Protection Paint layer, 30... Strong adhesion lacquer or ink layer, 32 and 34... Weak adhesion or non-adhesion lacquer or ink layer, 36...
...Annular inner circumferential portion, 38...Strong adhesion area, 40...Weak adhesion to non-adhesion area, 42...Protrusion part, 44...
Small portion.

Claims (1)

[Claims for Utility Model Registration] 1. A shell having a top wall and a skirt wall hanging from the periphery of the top wall, and a liner provided on the inner surface of the top wall of the shell, and the liner has an endless fracture. a line is formed, and the liner is partitioned into a peel removal section defined inside the break line and a residual seal section defined outside the break line, the peel removal section being defined on the outside of the break line. In a container lid with a partially removable liner that is weakly bonded or non-adhered to the inner surface of the top wall; the residual seal portion is weakly bonded or non-adhered to the inner surface of the top wall. The weakly bonded or non-adhesive region includes a weakly bonded or non-adhesive region that is in a state of weak adhesion or a strongly bonded region that is strongly bonded to the inner surface of the top wall, and the weakly bonded or non-adhesive region is at least A container lid characterized by being present on an annular outer periphery. 2. The container lid according to claim 1, wherein the strong adhesive region is present at least in the annular inner peripheral portion of the residual seal portion. 3. A utility model in which the strongly bonded region is present not only in the annular inner periphery but also in a plurality of protrusions projecting radially outward from the annular inner periphery at intervals in the circumferential direction. A container lid according to registered claim 2. 4. In addition to the annular inner periphery, the strongly bonded region is present in a plurality of small portions located radially outward from the annular inner periphery and spaced apart in the circumferential direction. Scope of Claims for Utility Model Registration No. 2
Container lid as described in Section 3 or Section 3.