JPH06263156A - Container cover of synthetic resin with indication of prize - Google Patents

Abstract

PURPOSE:To make it impossible to see an indication of prize even in a container made from transparent material by providing an engaging piece which partially conceals the indication of prize when a container cover is attached to the neck of the mouth of a container in the case that the indication of prize is provided at the lower part of a tamper evident of a skirt wall. CONSTITUTION:A main body 2 comprising a top face wall 4 and a cylindrical skirt wall 6 suspending from the peripheral of the wall 4 is provided, and the wall 6 is divided into an upper main part and a lower part 12 of a tamper evident by a circumferetial weakening line 8 extending in the circumferential direction. And on the inner surface of the lower part 12, there is formed an indication of prize 34 such as, for example, letters 'a hit', a mark of a star, which are displayed by protrusions formed on the inner surface. In such a container cover, a plurality of engaging pieces 20 are provided, spaced from each other, in the circumferential direction on the inner surface of the part 12 so as to be radially inwardly in one direction. And when the container cover is placed, the engaging pieces 20... are deformed so that the indication 34 is covered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin container lid having a tamper-evidence hem of a skirt wall and a prize display.

[0002]

2. Description of the Related Art As a well-known container lid for a container such as a glass for drinks or a bottle made of synthetic resin, a synthetic resin container lid having a so-called tamper-evidence characteristic is widely put into practical use. ing. Such a container lid has a circular top wall and a cylindrical skirt wall depending from the top wall.
A circumferential weakening line extending in the circumferential direction is formed on the skirt wall, and the skirt wall is divided into a main portion above the circumferential weakening line and a tamper-evidence skirt below the circumferential weakening line. The circumferential weakening line itself is composed of a plurality of circumferentially spaced slits (cutting grooves) extending in the circumferential direction and a plurality of bridge portions left between the slits. One of the plurality of bridging portions is a non-breaking bridging portion having greater strength than the other bridging portions. A female thread is formed on the inner surface of the main portion of the skirt wall, and a locking piece is formed on the inner surface of the tamper-evident skirt portion of the skirt wall. Conveniently, a plurality of locking pieces are formed at intervals in the circumferential direction, and each of them is formed so as to extend inward in the radial direction toward the circumferential direction. Further, there is also proposed a locking piece that extends obliquely inward in the radial direction upward in the axial direction, and in this case, a single locking piece that continuously extends in the circumferential direction in an annular shape is formed. Alternatively, a plurality of locking pieces are formed at intervals in the circumferential direction. An axial weakening line is formed on the tamper-evident hem of the skirt wall. This axial weakening line usually consists of a score with a reduced material thickness.

The container lid of the above-mentioned form is applied to a container of the form in which a male thread and an annular locking jaw located below the male thread are formed on the outer peripheral surface of the mouth and neck. When the container lid is attached to the mouth and neck of the container as required, the female screw of the container lid is screwed into the male screw of the mouth and neck, and the locking piece of the container lid is locked by the jaw of the mouth and neck. It is locked to the part. When opening the mouth and neck of the container, the bridges other than the non-broken bridges in the circumferential weakening line are broken, and the axial weakening line formed in the tamper-evident skirt of the skirt wall. Is broken, and thus the locking piece is unlocked from the locking jaw, and the container lid is separated from the mouth and neck.

[0004]

[Problems to be Solved by the Invention] It has already been proposed to give a prize mark to a container lid for sales promotion, and usually,
The prize display is provided on the inner surface of the top wall. However, when the prize is displayed on the inner surface of the ceiling wall, there are the following problems. In the case of a container lid having a prize display showing a win, a predetermined prize is given in exchange for such a container lid. Therefore, it is absolutely necessary for the user to return the container lid with the required prize mark on the inner surface of the top wall to the seller, and to temporarily temporarily seal the mouth and neck of the container once opened. The lid can no longer be used. Also, when the container is transparent or translucent, it is possible to visually recognize the prize display provided on the top wall of the container lid through the container without removing the container lid from the mouth and neck of the container, There is also a possibility that the prize characteristic will be damaged.

In order to solve the above problems,
For container lids in which a separately molded sealing liner is applied to the inner surface of the top wall, when a part of the sealing liner is detached from the container lid body, the prize display placed on the sealing liner is displayed. It is intended to be configured to appear. However, when adopting such a configuration, it is necessary that a part of the sealing liner be easily detached, and that a prize display be displayed on the sealing liner. Therefore, the productivity of the container lid is significantly reduced and the manufacturing cost is significantly increased.

On the other hand, Japanese Utility Model Publication No. 58-4832 discloses that
It is disclosed that a prize display is provided on the inner surface of the skirt of the tamper-evidence in the main body made of a thin metal plate of the container lid. In such a container lid, when the container is transparent or translucent, it is possible to visually recognize the prize display provided on the top wall of the container lid without removing the container lid from the mouth and neck of the container. Although there is still a problem, it is possible to break the non-breaking bridge part and separate the tamper evidence hem from the main part of the skirt wall and return only the tamper evidence hem to the seller in exchange for a prize. Therefore, it is possible to temporarily temporarily seal the mouth and neck of the container once opened by using the container lid with the tamper-evident hem separated. Further, the prize display can be formed by printing on the thin metal plate material in advance, and it is possible to easily avoid a significant decrease in productivity or a significant increase in manufacturing cost.

Thus, in the case where the container lid body is also formed of synthetic resin instead of a thin metal plate, when the prize display is formed on the inner surface of the tamper-evident hem of the skirt wall, the container is transparent. In addition to the problem that in the case of translucency, it is possible to visually recognize the prize mark on the top wall of the container lid without removing the container lid from the neck and neck of the container, in addition to the following: There is a problem to be solved. That is, in the case of a synthetic resin container lid, as is easily understood, it is impossible to perform the required printing prior to molding, and in order to form the prize display by printing, after forming the container lid It is necessary to print on the tamper-evidence skirt of the skirt wall, but such printing is quite difficult, if not impossible, and greatly increases manufacturing costs. If the prize display is not defined by convex portions or concave portions instead of printing, so-called forced pulling is generated in the die cutting at the time of molding the container lid due to the convex portions or concave portions, and the required prize display is not always required. It cannot be formed easily enough. Furthermore, in the case of a synthetic resin container lid, the non-breaking bridging portion in the circumferential weakening line, which remains without being broken when opening the mouth and neck of the container, is ruptured after opening the tamper. It is not always easy to separate the evidence skirt from the main part of the skirt wall.
If the strength of the non-broken bridge is significantly reduced in order to facilitate the breaking of the non-broken bridge, the axial rupture formed at the tamper-evident hem when the container neck and neck are opened. Without breaking the line, the non-broken bridge is broken and the tamper-evidence hem is separated from the main part of the skirt wall, so that the tamper-evidence hem does not separate from the container neck and neck. It tends to remain in the.

The present invention has been made in view of the above facts, and a first technical problem thereof is to provide a prize display which is substantially impossible to visually check even when the container is transparent or translucent. A new and improved synthetic resin container lid formed on the tamper-evident hem of the skirt wall.

A second technical problem of the present invention is that when the prize display defined by the convex portion or the concave portion is formed on the inner surface of the tamper-evidence hem portion, the die marking during molding is performed. It is an object of the present invention to provide a new and improved synthetic resin container lid in which obstacles can be reliably avoided.

A third technical problem of the present invention is that it does not cause a separate problem such as breakage of a non-breaking bridging part in a circumferential weakening line when the mouth-neck part of a container is opened,
A new and improved synthetic resin that allows the tamper-evidence skirt to be separated from the main part of the skirt wall by easily breaking the non-broken bridge after removing the container lid from the mouth-neck of the container. The purpose is to provide a container lid.

[0011]

According to a first aspect of the present invention, in order to solve the first technical problem, the tamper-evidence skirt portion of the skirt wall extends from the inner surface thereof. In a synthetic resin container lid in which a stopper is arranged, in a state where the container lid is attached to the mouth and neck of the container, the locking piece at least partially hides the prize display,
Form a prize display on the inside of the tamper-vident hem.

That is, according to the first aspect of the present invention, as a synthetic resin container lid for solving the above-mentioned first technical problem,
A top wall and a skirt wall hanging from the top wall;
A circumferential weakening line extending in the circumferential direction is formed on the skirt wall, and the skirt wall has a main portion above the circumferential weakening line and a tamper-evidence hem portion below the circumferential weakening line. In the synthetic resin container lid in which the locking piece extending from the inner surface of the tamper-evidence skirt is provided, the inner surface of the tamper-evident hem of the skirt wall is A synthetic resin, wherein a prize display is formed, and the locking piece is configured to at least partially cover the prize display when the container lid is attached to the mouth and neck of the container. A container lid is provided.

According to a second aspect of the present invention, in order to solve the first technical problem, a locking piece extending from the inner surface of the tamper-evidence skirt of the skirt wall is arranged. In a container lid made of synthetic resin that is installed, a prize mark is displayed on the surface of the locking piece that faces the inner surface of the tamper-evident skirt of the skirt wall when the container lid is attached to the mouth and neck of the container. To form.

That is, according to the second aspect of the present invention, as a synthetic resin container lid for solving the above-mentioned first technical problem,
A top wall and a skirt wall hanging from the top wall;
A circumferential weakening line extending in the circumferential direction is formed on the skirt wall, and the skirt wall has a main portion above the circumferential weakening line and a tamper-evidence hem portion below the circumferential weakening line. In the container lid made of synthetic resin, in which the locking piece extending from the inner surface is disposed in the hem of the tamper evidence, the container lid of the locking piece is a mouth neck part of the container. Provided is a synthetic resin container lid, wherein a prize display is formed on a surface of the skirt wall facing the inner surface of the tamper-evidence skirt portion in a state of being mounted on.

According to the third aspect of the present invention, in order to solve the above-mentioned second technical problem, the inner surface of the tamper-evidence skirt portion of the skirt wall is provided with a radial outward direction 1
A draft angle is formed that is inclined at an inclination angle of 10 degrees or more, and a prize display defined by a convex portion or a concave portion with an amount of protrusion or depression of 0.05 mm or less is formed on the inner surface of the tamper evidence skirt. .

That is, according to the third aspect of the present invention, as a synthetic resin container lid for solving the above-mentioned second technical problem,
A top wall and a skirt wall hanging from the top wall;
A circumferential weakening line extending in the circumferential direction is formed on the skirt wall, and the skirt wall has a main portion above the circumferential weakening line and a tamper-evidence hem portion below the circumferential weakening line. In the synthetic resin container lid in which the locking piece extending from the inner surface of the tamper-evidence skirt is provided, the inner surface of the tamper-evident hem of the skirt wall is , A prize display defined by a convex portion or a concave portion that has a draft that inclines downward in the radial direction at an inclination angle of 1 degree or more and that has a protrusion or depression amount of 0.05 mm or less A container lid made of a synthetic resin is provided.

Further, according to a fourth aspect of the present invention, in order to solve the third technical problem, a prize display is formed on the skirt tamper of the skirt wall, and a tamper on the skirt wall is also formed. An axial slit extending over the entire length in the axial direction is formed in the skirt of the evidence.

That is, according to the fourth aspect of the present invention, as a synthetic resin container lid for solving the above-mentioned third technical problem,
A top wall and a skirt wall hanging from the top wall;
A circumferential weakening line extending in the circumferential direction is formed on the skirt wall, and the skirt wall has a main portion above the circumferential weakening line and a tamper-evidence hem portion below the circumferential weakening line. In the synthetic resin container lid in which the locking piece extending from the inner surface is arranged in the tamper-evidence hem, a prize is displayed on the tamper-evident hem of the skirt wall. Is formed,
The circumferential weakening line comprises a plurality of circumferentially spaced slits extending in the circumferential direction and a plurality of bridge portions remaining between the slits, and the tamper of the skirt wall is formed. Provided is a synthetic resin container lid, characterized in that an axial slit extending over the entire length in the axial direction is formed in the skirt of the evidence.

[0019]

In the synthetic resin container lid constructed according to the first aspect of the present invention, when the container lid is attached to the mouth and neck of the container, it is formed on the tamper-evidence skirt of the skirt wall. Even if the prize mark is at least partially obscured by the locking pieces, and therefore the container is transparent or translucent, it is practically impossible to see the prize mark unless the container is removed from the mouth and neck of the container. It is possible. On the other hand, after removing the container lid from the mouth and neck of the container, at least most of the circumferential weakening line is broken and at least most of the tamper-evidence skirt is separated from the main part of the skirt wall, Therefore, it is possible to clearly and clearly see the prize display from above or below the skirt of the tamper evidence.

In the container lid made of synthetic resin constructed according to the second aspect of the present invention, the tamper-evidence skirt of the skirt wall in the state where the container lid of the locking piece is attached to the mouth and neck of the container. The prize display is formed on the surface facing the inner surface of the container, that is, the surface where the visual contact is blocked by the locking piece itself, so even if the container is transparent or translucent, It is practically impossible to see the prize display unless the container is removed. On the other hand, after removing the container lid from the mouth and neck of the container, at least most of the circumferential weakening line is broken and at least most of the tamper-evidence skirt is separated from the main part of the skirt wall, Therefore, it is possible to clearly and clearly see the prize display from above or below the skirt of the tamper evidence.

In the synthetic resin container lid constructed according to the third aspect of the present invention, the tamper-evidence skirt portion of the skirt wall has a draft angle of 1 degree or more, and a convex portion or a concave portion. Projection or immersion of 0.05m
According to the experience of the present inventor,
It is possible to mold the container lid provided with the required prize display easily enough without causing any problems during die cutting. Due to the shrinkage of the synthetic resin in the mold with cooling due to the presence of draft,
The present inventor presumes that the protrusion or immersion amount of mm or less is absorbed, and excessive overdrawing is avoided.

In the synthetic resin container lid constructed according to the fourth aspect of the present invention, the tamper-evidence skirt has pre-cut axial slits formed therein, and therefore bridges in the circumferential weakening line. Even if all the entanglements are made relatively weak, when opening the mouth and neck of the container, one or several bridges adjacent to the axial slits formed in the tamper-evidence skirt are used. The line is weakened and the circumferential weakening line is broken as required. After removing the container lid from the mouth and neck of the container, the remaining relatively weak bridging part can be easily broken to separate the tamper-evident hem from the main part of the skirt wall. it can.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a container lid constructed according to the present invention will now be described in more detail with reference to the accompanying drawings.

Referring to FIG. 1, the illustrated container lid constructed in accordance with the present invention comprises a body generally designated 2 which is molded from a suitable synthetic resin such as polyethylene or polypropylene. . The body 2 comprises a circular top wall 4 and a cylindrical skirt wall 6 depending from the periphery of the top wall 4. A circumferential weakening line 8 extending in the circumferential direction is formed on the skirt wall 6, and the skirt wall 6 has a main portion 10 above the circumferential weakening line 8 and a tamper evidence hem below the circumferential weakening line 8. It is partitioned into a section 12. A plurality of protruding ribs 14 are arranged on the inner surface of the skirt wall 6 at intervals in the circumferential direction, and the ribs 14 project radially inward over the weakening line 8. . The weakening line 8 is the rib 14
The tamper-evidence skirt 12 is formed by continuously cutting the skirt wall 6 in the circumferential direction while leaving only the remaining part, and thus the tamper-evidence skirt 12 is attached to the main portion 10 via the residual bridging portion defined by the rib 14. It is connected. A female thread 16 is formed on the inner surface of the main portion 10 of the skirt wall 6. The outer surface of the main portion 10 of the skirt wall 6 is provided with a concavo-convex shape 18 for preventing slipping of a finger hung there. On the other hand, a plurality of locking pieces 20 are arranged on the inner surface of the tamper-evidence skirt 12 at intervals in the circumferential direction. Each of the locking pieces 20 extends from the inner surface of the tamper-evidence skirt 12 inwardly in the radial direction toward the counterclockwise direction (the container lid opening direction) when viewed from above in FIG. 1. . The base of the locking piece 20 (the portion connected to the inner surface of the tamper-evidence skirt 12) is tilted counterclockwise downward in the axial direction when viewed from above in FIG. Tamper evidence hem 1
An inward curl 22 that is curved inward in the radial direction is formed at the lower end portion of 2. Such inward curl 22
1 at the time of compression molding or injection molding of the main body 2.
Conveniently formed by bending inward in the radial direction after being compression-molded or injection-molded without being bent inward in the radial direction as shown by the chain double-dashed line. You can
The tamper-evidence skirt 12 is further formed with an axial slit 24 extending over the entire axial length. The axial slit 24 can be conveniently formed by cutting the inward curl 22 along the entire length in the axial direction together with the main portion of the tamper-evidence skirt 12 at a portion where the locking piece 20 does not exist.

Continuing the description with reference to FIG. 1, an annular lip 25 extending inward in the radial direction is formed at the upper end of the inner surface of the skirt wall 6, and the lower surface side of the annular lip 25 and the skirt wall 6 are formed. A plurality of gusset pieces 26 are arranged between the inner surface and the inner surface at intervals in the circumferential direction to connect the two. A seal member 28 is arranged in a space defined between the top wall 4 and the annular lip 25. The seal member 28 can be conveniently formed by compression molding a suitable synthetic resin such as soft polyethylene at a desired position in the main body 2. The seal member 28 includes two annular seal portions that hang downward, that is, an outer annular seal portion 30.
And an inner annular seal portion 32.

Thus, the above-described structure of the illustrated container lid is already known, and does not constitute a novel feature of the container lid improved according to the present invention. For example, JP-A-4-311461. It may be substantially the same as the configuration of the container lid disclosed in the publication. Therefore, detailed description of the illustrated container lid as described above is omitted herein.

Referring to FIGS. 2 and 3 in conjunction with FIG. 1, in the illustrated container lid improved in accordance with the present invention, the inner surface of the tamper-evidence hem 12 may have, for example, the letters "hit" or the symbol "☆". A prize display 34 such as “” is formed. The prize display 34 is defined by the convex portion formed on the inner surface of the tamper-evidence skirt 12. The prize display 34 may be defined by a concave portion instead of the convex portion. When the prize display 34 is defined by a convex portion or a concave portion, such a convex portion or a concave portion forms a concave portion or a convex portion corresponding to the molding die of the main body 2, and the prize display is formed when the main body 2 is molded by compression molding or injection molding. It is preferred that the body with 34 be molded. In this case, so-called irrational punching is generated at the time of die cutting due to the convex portion or the concave portion defining the prize display 34, but according to the experiment of the inventor, as clearly shown in FIG.
The inner surface of the tamper-evidence skirt 12 to which the prize display 34 is applied is provided with a draft that inclines radially outward toward the lower side at an inclination angle α of 1 degree or more, and the amount of protrusion or depression x of the convex portion or the concave portion. It has been confirmed that the main body 2 provided with the prize display 34 can be molded without causing any trouble if the value is set to 0.05 mm or less. The prize display 34 may be easily visible before the container lid is attached to the mouth and neck of the container. However, in the state where the container lid is attached to the mouth and neck of the container as described below and the locking piece 20 is bent as shown by the chain double-dashed line in FIG. It is important that the prize display 34 is covered with the container so that it is substantially impossible to visually recognize the prize display 34 through the container even when the container is transparent or translucent. Such requirements can be satisfied by appropriately selecting the arrangement position and size of the prize display 34 in relation to the form of the locking piece 20.

If desired, a prize display 34 as shown in FIG.
The surface of the convex portion or the concave portion defining the prize is made satin, or the peripheral surface surrounding the convex portion or the concave defining the prize indication 34 is made satin as shown in FIG. 5, so that the prize indication 34 can be easily identified. It can also be done. Instead of defining the prize display 34 by the convex portion or the concave portion, the prize display 34 can be defined only by making the surface of the specific region (the prize display region or its surrounding region) a satin finish.

Continuing the description with reference to FIG. 6 together with FIG. 1, the container lid described above is applied to a container having a mouth / neck portion 36. A container that can be formed from a suitable synthetic resin such as polyethylene terephthalate or glass has a generally cylindrical mouth-neck portion 36. On the outer surface of the mouth / neck portion 36, a male thread 38 and an annular locking jaw 40 located below the male thread 38 are formed. When the container lid is attached to the mouth / neck portion 36 to seal the container, the container lid is fitted to the mouth / neck portion 36 and rotated clockwise (the container lid closing direction) when viewed from above in FIG. 6. As a result, as clearly shown in FIG. 6, the container lid is moved down with respect to the mouth / neck portion 36, and the female thread 16 formed on the inner surface of the main portion 10 of the skirt wall 6 of the container lid 16 is rotated. Is screwed onto a male screw thread 38 formed on the outer surface of the mouth / neck portion 36. At this time, the locking piece 20 formed on the inner surface of the tamper-evidence skirt 12 of the container lid is elastically displaced or deformed, and the locking jaw 40 formed on the outer surface of the mouth / neck portion 36. And is elastically partially restored to be locked to the lower surface of the locking jaw 40. As shown in FIG. 6, when the container lid is mounted on the mouth / neck portion 36 of the container as required, the outer annular seal portion 30 and the inner annular seal portion 32 of the seal member 28 disposed on the inner surface of the top wall 4 are provided. Is brought into close contact with the top surface of the mouth / neck portion 36, thereby sealing the mouth / neck portion 36. Thus, as shown in FIG. 6, when the container lid is mounted on the mouth / neck portion 36 of the container as required,
The tip of the locking piece 20 is brought into contact with a portion of the mouth / neck portion 36 immediately below the locking jaw 40, and is slightly outward in the radial direction from the state before mounting (the state shown by the solid line in FIG. 2). It is elastically bent in the direction (indicated by a chain double-dashed line in FIG. 2) to at least partially cover the prize display 34 formed on the inner surface of the tamper-evidence skirt 12. Therefore, even if the container is transparent or translucent, it is substantially impossible to visually recognize the prize display 34 through the container, and it is prevented that the prize display 34 is illegally visually recognized before the purchase. .

When opening the mouth / neck portion 36 for eating and drinking the contents of the container, the container lid is rotated counterclockwise as viewed from above in FIG. As a result, the female thread 16 of the container lid is moved along the male thread 38 of the mouth / neck portion 36, so that the container lid is raised with rotation. Thus, in the tamper-evidence skirt 12, the locking piece 20
Is prevented from rising because it is locked to the lower surface of the locking jaw 40 of the mouth / neck portion 36, and thus, in the circumferential weakening line 8,
More specifically, a considerable amount of stress is generated in the plurality of bridging portions defined by the plurality of ribs 14 (FIG. 1), and is formed in the tamper-evidence skirt 12 when viewed in the rotation direction of the container lid. The bridging portion is broken, leaving one to several bridging portions located adjacent to and behind the axial slit 24. Due to the breakage of the bridging portion and the presence of the axial slits 24 formed in the tamper evidence skirt 12, most of the tamper evidence skirt 12 is displaced outward in the radial direction (FIG. 7). ),
As a result, the locking of the locking piece 20 with respect to the locking jaw 40 of the mouth / neck portion 36 is released. After that, the tamper-evidence skirt 12 is also allowed to rise freely, and thus the entire container lid is separated from the mouth-neck portion 36,
Is opened. As will be clearly understood by referring to FIG. 7, when the tamper-evidence skirt 12 is deformed from an annular shape into a spiral shape and the container lid is detached from the mouth / neck 36, the tamper-evidence skirt 12 is formed. The prize display 34 formed on the inner surface of the can be visually recognized. If the container lid attached to the mouth and neck 36 of the purchased container has the prize display 34 on the inner surface of the tamper-evidence hem 12, the purchaser pulls the tamper-evidence hem 12. One or several residual bridging portions in the circumferential weakening line 8 are broken to completely separate the tamper-evidence skirt 12 from the main portion 10 of the skirt wall 6 and the separated tamper-evidence skirt. 1
Hand 2 to the store or mail to the seller to obtain the required gift. Since the tamper-evidence hem 12 is formed with the axial slit 24 which is not completely scored or perforated but needs to be completely broken at the time of opening, and is previously completely broken, the circumferential weakening line is formed. Even if all the bridging portions in 8 are made relatively weak, the tamper-evidence hem portion 12 will not be maintained in an endless annular shape at the time of opening. Therefore, it is possible to make the bridging portion which is not broken and remains during the opening operation to be relatively weak. Therefore, when the prize display 34 is found, the tamper-evidence hem 12 can be easily removed. It can be separated from the main part 10 of the skirt wall 6.

FIG. 8 illustrates another embodiment of a container lid constructed in accordance with the present invention. In the container lid illustrated in FIG. 8, a plurality of locking pieces 1 extending inwardly in a radial direction toward the inner surface of the tamper-evidence skirt 12 upward.
20 are formed. Between the plurality of locking pieces 120, a lower end has a semi-circular defective portion 121.
As indicated by the chain double-dashed line in FIG. 8, when the container lid main body 2 is compression-molded or injection-molded, each of the locking pieces 120 extends inward in a radial direction not downward but upward. It has been confused. After the compression molding or the injection molding, the locking piece 120 is forced upward and is brought into the state shown by the solid line in FIG. As shown by the two-dot chain line in FIG. 8, it faces one surface of the locking piece 120, that is, the inner surface of the tamper-evidence skirt 12 in the state shown by the solid line in FIG. 8 (the form attached to the mouth neck portion 36 of the container). A prize display 34 is provided on the side surface. The prize display 34 can be defined by a convex portion or a concave portion formed on the one surface of the locking piece 120. When the prize display 34 is defined by a convex portion or a concave portion, a so-called forced punching is generated at the time of die cutting due to the convex portion or the concave portion, but the amount of protrusion or immersion of the convex portion or the concave portion is 0. If it is set to about 0.05 mm or less, it is possible to perform die cutting without causing any trouble due to elastic displacement or deformation of the locking piece 120. The surface of the convex portion or the concave portion defining the prize display 34 may be satin-finished, or the peripheral surface surrounding the prize display 34 may be satin-finished. Further, instead of defining the prize display 34 by the convex portion or the concave portion, the prize display 34 can be defined only by making the surface of the specific region (the prize display region or its surrounding region) a satin finish.

In the container lid shown in FIG. 8, when the container lid is mounted on the mouth neck portion 36 (FIG. 6) of the container as required,
Locking piece 1 that extends upward and inclines radially inward
20 is locked on the lower surface of the locking jaw 40 (FIG. 6) formed on the mouth and neck 36. Since the prize display 34 is disposed on the surface of the locking piece 120 facing the inner surface of the tamper-evidence skirt 12, even if the container is transparent or translucent, the prize display 34 can be displayed through the container. It is virtually impossible to see, thus preventing unauthorized viewing and recognition of the prize display 34 prior to purchase.

The container lid shown in FIG. 8 has the locking piece 12 described above.
In addition to the configuration of 0 and the position of the prize display 34, inward curl is not attached to the tamper-evidence skirt 12, which is different from the container lid described with reference to FIGS. 1 to 7. However, other than these points, it is substantially the same as the container lid described with reference to FIGS. 1 to 7, and therefore the description of the configuration of the container lid shown in FIG. 8 other than these points is omitted.

[0034]

In the container lid constructed according to the present invention, it is practically impossible to visually check even when the container is transparent or translucent when the container lid is attached to the mouth and neck of the container. A prize display is formed on the skirt of the tamper evidence. Even when the prize display is defined by the convex portion or the concave portion, no obstacle is caused during die cutting in molding. When the tamper-evidence hem is marked with a prize, the tamper-evidence hem can be easily separated from the main part of the skirt wall to carry out the procedure for obtaining the required prize.

[Brief description of drawings]

FIG. 1 is a side view, partly in section, of a preferred embodiment of a container lid constructed in accordance with the present invention.

FIG. 2 is a partial perspective view showing an enlarged part of the container lid shown in FIG.

FIG. 3 is a partial cross-sectional view showing a part of the container lid shown in FIG. 1 in an enlarged manner.

FIG. 4 is a partial perspective view showing a modified example of the prize display on the container lid shown in FIG.

5 is a partial perspective view showing still another modified example of the prize display on the container lid shown in FIG. 1. FIG.

FIG. 6 is a side view, partly in section, showing a state where the container lid shown in FIG. 1 is mounted on the mouth and neck of the container as required.

FIG. 7 is a perspective view showing a state in which the container lid shown in FIG. 6 is detached from the mouth and neck of the container.

FIG. 8 is a side view, partly in cross section, of another embodiment of the container lid constructed according to the present invention.

[Explanation of symbols]

 2: Container lid body 4: Top wall 6: Skirt wall 8: Circumferential weakening line 10: Main part of skirt wall 12: Tamper evidence hem 20: Locking piece 34: Prize display 36: Container neck and neck 120: Locking piece

Claims (15)

[Claims] 1. A top wall and a skirt wall depending from the top wall, wherein a circumferential weakening line extending in the circumferential direction is formed in the skirt wall, and the skirt wall is formed from the circumferential weakening line. Is also divided into the upper main part and the tamper-evidence skirt below the circumferential weakening line,
In a container lid made of synthetic resin, in which a locking piece extending from the inner surface of the tamper-evident hem is arranged, a prize mark is formed on the inner surface of the tamper-evident hem of the skirt wall. A container lid made of synthetic resin, wherein the locking piece is configured to at least partially cover the prize display in a state where the container lid is attached to the mouth and neck of the container. 2. A plurality of locking pieces are provided at circumferential intervals in the tamper-evidence skirt of the skirt wall, and each of the locking pieces has the tamper-evidence skirt. The synthetic resin container lid according to claim 1, wherein the synthetic resin container lid is extended so as to be inclined radially inward from the inner surface of the container toward the circumferential direction. 3. The synthetic resin container lid according to claim 1, wherein the locking piece is extended upward and inclined inward in the radial direction. 4. A draft is formed on the inner surface of the tamper-evidence skirt portion of the skirt wall, which is inclined downward at an inclination angle of 1 degree or more outward in the radial direction, and the prize display is projected. Alternatively, the synthetic resin container lid according to any one of claims 1 to 3, which is defined by a convex portion or a concave portion having an immersion amount of 0.05 mm or less. 5. The synthetic resin container lid according to claim 4, wherein a surface of the convex portion or the concave portion which defines the prize display or a peripheral surface surrounding the convex portion or the concave portion is a satin finish. 6. The circumferential weakening line is composed of a plurality of circumferentially spaced slits extending in the circumferential direction and a plurality of bridging portions remaining between the slits. The synthetic resin container lid according to any one of claims 1 to 5, wherein an axial slit extending over the entire axial length is formed in the tamper-evident skirt of the skirt wall. 7. A top wall and a skirt wall hanging from the top wall, wherein a circumferential weakening line extending in the circumferential direction is formed on the skirt wall, and the skirt wall is formed from the circumferential weakening line. Is also divided into the upper main part and the tamper-evidence skirt below the circumferential weakening line,
A container lid made of synthetic resin, in which a locking piece extending from the inner surface of the tamper-evidence hem is provided, wherein the container lid of the locking piece is attached to the mouth and neck of the container. A synthetic resin container lid, characterized in that a prize display is formed on the surface of the skirt wall facing the inner surface of the tamper-evident skirt. 8. A plurality of locking pieces are provided at circumferentially spaced intervals on the tamper-evidence skirt of the skirt wall, and each of the locking pieces is the tamper-evidence skirt. The synthetic resin container lid according to claim 7, wherein the synthetic resin container lid is extended so as to be inclined radially inward from the inner surface of the container toward the circumferential direction. 9. The synthetic resin container lid according to claim 7, wherein the locking piece is extended upward and inclined inward in the radial direction. 10. The synthetic resin container lid according to claim 7, wherein the prize display or a peripheral surface surrounding the prize display is a satin surface. 11. The circumferential weakening line is composed of a plurality of circumferentially spaced slits extending in the circumferential direction and a plurality of bridging portions remaining between the slits. The synthetic resin container lid according to any one of claims 7 to 10, wherein an axial slit extending over the entire length in the axial direction is formed in the tamper-evident skirt portion of the skirt wall. 12. A ceiling wall and a skirt wall depending from the ceiling wall, wherein a circumferential weakening line extending in the circumferential direction is formed on the skirt wall, and the skirt wall is formed from the circumferential weakening line. Is also divided into an upper main part and a tamper-evidence skirt below the circumferential weakening line, and a locking piece extending from the inner surface is arranged in the tamper-evident skirt. In the synthetic resin container lid, on the inner surface of the tamper-evidence hem of the skirt wall,
There is a draft that inclines downward in the radial direction at an inclination angle of 1 degree or more, and a prize display defined by a convex portion or concave portion with a protrusion or depression amount of 0.05 mm or less is displayed. A synthetic resin container lid characterized by being formed. 13. The synthetic resin container lid according to claim 12, wherein a surface of the convex portion or the concave portion defining the prize display or a peripheral surface surrounding the convex portion or the concave portion is a satin finish. 14. The circumferential weakening line is composed of a plurality of circumferentially spaced slits extending in the circumferential direction and a plurality of bridging portions remaining between the slits. The synthetic resin container lid according to claim 12 or 13, wherein an axial slit extending over the entire length in the axial direction is formed in the tamper-evident skirt of the skirt wall. 15. A top surface wall and a skirt wall depending from the top surface wall, wherein a circumferential weakening line extending in the circumferential direction is formed on the skirt wall, and the skirt wall is formed from the circumferential weakening line. Is also divided into an upper main part and a tamper-evidence skirt below the circumferential weakening line, and a locking piece extending from the inner surface is arranged in the tamper-evident skirt. In a synthetic resin container lid, a prize mark is formed on the skirt wall of the tamper-evidence hem, and the circumferential weakening line is provided with a plurality of slits extending in the circumferential direction at intervals in the circumferential direction. An axial slit extending over the entire length in the axial direction is formed in the tamper-evidence skirt portion of the skirt wall, which is composed of a plurality of bridging portions remaining between the slits. To Plastic container closure according to symptoms.