JPS6322358A - Vessel cover having pilfer-proof characteristic - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a container lid having a pilfer-proof property, and more particularly to a container lid having a pilfer-proof property that once an opening operation is performed, the traces thereof are clearly displayed. Concerning container lids.

<Prior art> In order to prevent fraud such as the incorporation of foreign objects into the container contents, container lids with pilfer-proof properties have been proposed that display traces of -B opening operations. It has been put into practical use.

Typical examples of such container lids include the following two types.

The container lid of the first form has a top wall and a cylindrical skirt wall that hangs down from the periphery of the top wall, and the skirt wall is formed with a weakened line extending in the circumferential direction. The skirt wall is divided into an upper part located above the weakened line and a lower pilfer-proof zone located below the weakened line. In such a container lid, the entire weakened line is broken during the opening operation, the lower pilfer-proof band is separated, and the top wall and the upper part of the skirt wall are separated from the mouth of the container. However, the lower pilfer proof band is left on the neck of the container.

The container lid of the second form has at least one weakened line.
It differs from the container lid of the form described in -1-Description 1 in that it includes high-strength non-breakable parts at several locations, and that at least one axial weakening line is formed in the lower pilfer-proof zone. . In the second form of the container lid,
During the opening operation, the weakened line is broken except for the high-strength unbreakable part, and the axial direction l1i1 weakened line is broken, and the weakened line is broken along with the top wall and the upper part of the skirt wall. The lower pilfer-proof strip, which is connected to the upper part of the skirt wall through a high-strength unbreakable section in the line that remains unbroken, is also removed from the mouth of the container.

<Problems with the prior art> However, on conventional container lids, the indication of the opening operation is not sufficiently obvious, and there is a risk that the indication of the opening operation may be overlooked unless carefully observed. There is a problem that the characteristics are not sufficiently secured.

More specifically, in the container lid of the first form,
When the top wall and the upper part of the skirt wall, which have been separated from the neck and neck of the container, are reattached to the neck and neck of the container, the lower edge of the upper part of the skirt wall is removed from the lower pilfer-proof band that remains on the neck and neck of the container. is brought into close proximity to or in contact with the upper edge, and therefore, unless carefully observed, it appears as if the weakened line remains unbroken and therefore as if the opening operation has not yet been performed. .

In addition, in the container lid of the form described in 2.2, after the entire container lid is removed from the mouth and neck of the container, the high-strength unbreakable portion at the weakened line indicated in - is forcibly broken, and the lower part of the lid is forcibly broken. When the fur-proofing strip is separated and the top wall and the top of the skirt wall are then attached to the neck of the container, the bottom pilfer will naturally be removed unless one carefully observes the lower edge (i.e., the broken edge) of the top of the skirt wall. It looks like a container lid without a proof band, and it is often easy to overlook that the opening operation has already been performed.

<Object of the Invention> The present invention has been made in Nh for the purpose -4-, and its main purpose is - Once the opening operation is performed, the traces are clearly displayed and there is no need for careful observation. - To provide a new and superior container lid in which this fact is clearly understood without the need for careful observation when the opening operation is performed, and thus the pilfer-proof property is sufficiently ensured.

<Summary of the Invention> According to the present invention, as a container lid that achieves the second object,
It has a top wall and a cylindrical skirt wall that hangs down from the periphery of the top wall, and the skirt wall is formed with an upper weakened line and a lower weakened line that are spaced apart in the axial direction and exist in the circumferential direction. The skirt wall includes an upper portion located above the upper line of weakening, a pilfer-proof zone between the upper line of weakening and the lower line of weakening, and a lower portion located below the lower line of weakening. The upper line of weakening is configured to be able to break during an opening operation except for at least one high-strength non-breakable part, and the lower line of weakening is arranged so that it can be broken during an opening operation, and the lower line of weakening is arranged so that it can be broken during an opening operation, except for at least one high-strength non-breakable part. The pilfer-proof strip has at least one axially extending line of weakening that can be broken during the opening operation, and the pilfer-proof strip has at least one axially extending line of weakening that can be broken during the opening operation. A container lid having pilfer-proof properties is provided.

<Preferred Embodiments of the Invention> Hereinafter, preferred embodiments of the container lid constructed according to the present invention will be described in detail with reference to the accompanying drawings.

Structure Referring to FIG. 1, the illustrated container lid, which is generally designated by the number 2, has a circular top wall 4 and a substantially cylindrical skirt wall 6 that hangs downward from the periphery of the top wall 4. have The container lid 2 may be formed from a suitable synthetic resin or the like, but it is conveniently formed from a metal sheet such as an aluminum sheet, a chromic acid-treated steel sheet, or a tin plate.

The skirt wall 6 is formed with two axially spaced weakened lines extending in the circumferential direction, namely an upper weakened line 8 and a lower weakened line 10. Thus, the skirt wall 6 has two parts 12 located on the side of the line of weakness 8, one side of the line of weakness 8 and one part of the lower line of weakness 10.
and a lower part 16 located below the lower weakened line 10.

In the illustrated specific example, the dividing line 8 consists of a plurality of slits 1 extending in the circumferential direction at intervals in the circumferential direction.
8 and a plurality of bridge parts 2 located between the slits 18
Consists of 0. A specific one 20a of the plurality of bridging parts 20 has a circumferential width Wl larger than the circumferential width w2 of the other bridging parts 20. As will be further mentioned later, the specific bridge portion 20a is a high-strength non-breakable bridge portion that constitutes a high-strength non-breakable portion that is maintained without being broken during the opening operation, and other bridges The portion 20 is a breakable bridging portion that is broken during an unsealing operation. If desired, some of the plurality of bridges 20 may be formed into high-strength non-breakable bridges 2.
It can also be set to 0a.

Furthermore, instead of defining the upper weakened line by the slit 18 and the bridging portion 20, the upper weakened line can also be defined by a score formed by reducing the abrasive thickness. In this case, the material thickness can be reduced less or not at all in one or several high-strength non-rupture parts than in other parts.

The lower weakening line 10 in the illustrated example also includes a plurality of slits 22 extending in the circumferential direction at intervals in the circumferential direction.
A plurality of bridge portions 24 located between the slits 22
It consists of All of the plurality of bridge portions 24 are broken bridge portions whose circumferential width W3 is relatively small. As will become clear from the following description, the plurality of bridges 24 in the lower weakened line 10 break before (or substantially simultaneously with) the fracture of the broken bridges 20 in the upper weakened line 8.
It is important that the container lid 2 is broken when the container lid 2 is attached to the mouth and neck of the container or when the container is opened, and from this point of view,
Circumferential width w3 of the bridging portion 24 at the lower weakened line 10
is preferably made somewhat smaller than the circumferential width w2 of the broken bridging portion 20 at the upper weakened line 8. If desired, instead of defining the lower line of weakness 10 by the slit 22 and the bridge 24, the lower line of weakness 10 can also be defined by a score formed by reducing the material thickness.

In the pilfer-proof zone 14 between the upper weakened line 8 and the lower weakened line 10, one axial weakened line 26 is formed that extends in the axial direction 1fil. The weakened line 26 can be defined by a so-called perforation, but is preferably defined by a score formed by reducing the material thickness. Further, the circumferential position of the weakened line 26 is preferably aligned with or near one edge of the high-strength unbreakable bridging portion 20a in the upper weakened line 8. If desired, several axial weakened lines 26 can be formed in the pilfer-proof zone 14 at suitable circumferential intervals.

In the illustrated example, the outer peripheral surface of the lower region of the -F section 12 of the skirt wall 6 is further provided with an unevenness or knurling 28 to prevent fingers from slipping thereon. Furthermore, an annular groove 29 is formed in the upper end region of the upper portion 12 of the skirt wall 6 . In addition,
A sealing gasket 30 that can be made of a suitable synthetic resin is provided on the inner surface of the top wall 4.

Now, an example of how to use the above-mentioned ill-contained container lid 2 will be explained.

To explain with reference to FIG. 2, the container M2 as described above
A typical example of a container to which this is applied includes a generally cylindrical neck portion 32 with an open top end.

A female thread 34 is formed on the outer peripheral surface of the mouth and neck portion 32. Further, on the outer peripheral surface of the mouth portion 32, the female thread 34 is provided.
An annular groove 36 is formed below this, and an annular locking jaw 38 is defined by the upper end region of the annular groove 36 .

In order to attach the container M2 to the mouth part 32 and seal the mouth and neck part 32, as shown in FIG. A pressing tool (not shown) is activated to press downward, thus pressing the gasket 30 against the upper end of the neck portion 32. Then, while maintaining the above-mentioned pressed state, the upper region of the upper part 12 of the skirt wall 6 is formed into the male thread 34 of the neck part 32 by means of a suitable thread generator (not shown) which may be of a known form per se. , thereby producing a female thread 40 that is screwed onto the male thread 34. Also, the portion of the mouth portion 32 located corresponding to the annular groove 36, that is, in the illustrated embodiment, the lower half region of the pilfer-proof zone 14 of the skirt wall 6 and the upper end region of the lower portion 16, is itself is deformed radially inwardly by a suitable deforming device (not shown) which may be of known form and thus locked into the annular locking jaw 38 of the mouth portion 32.

In this case, as shown in FIG.
The region in which the is formed is deformed radially inward, and the bridge 24 at the lower line of weakness 10 is therefore stressed. Although this is not necessary, it is preferable to completely or partially break the bridge 24 in the lower line of weakening 10.

On the other hand, the portion of the skirt wall 6 that is deformed radially inward and is locked into the annular locking jaw 38 of the mouth portion 32 is
The area does not necessarily have to include the lower weakened line 10, but may be any area below the upper weakened line 8, for example, the lower end of the lower part 16. Furthermore, in cases where the container lid 2 is made of synthetic resin, instead of deforming a specific portion of the skirt wall 6 radially inward and locking it to the annular locking jaw 38 of the mouth portion 32, Elastically deformable locking protrusions of various shapes known to those skilled in the art are formed in advance on the inner circumferential surface of a specific portion of the skirt wall 6, and when the container lid 2 is fitted onto the mouth portion 32, the locking protrusions are formed. is oral part 32
It can also be adapted to be elastically locked in the annular locking jaw 38 of the. Furthermore, in the illustrated embodiment, the female threads 40 are formed in the portion 12 of the skirt wall 6 after the container lid 2 is fitted over the mouth portion 32; however, if desired, the skirt wall 6 may be A female thread 40 is formed in advance on the upper part 12 of the container lid 2, and when the container lid 2 is attached to the mouth part 32, the container lid 2 is rotated, and the female thread 40 formed in advance is attached to the mouth part 32.
It can also be screwed into the male thread 34 of.

In order to unseal the mouth part 32 of the container, place your finger on the unevenness or knurling 28 in the upper part 12 of the skirt wall 6, and then push the container lid 2 counterclockwise as seen from this side in FIG.
Rotate. In this way, since the female thread 40 of the container lid 2 is moved along the male thread 34 of the neck portion 32, the container lid 2 is raised as it rotates. However, since the lower half area of the pilfer-proof band 14 and the upper end area of the lower part 16 in the skirt wall 6 are deformed radially inward and locked to the annular locking jaw 3B of the mouth part 32, , to prevent the container lid 2 from rising. Thus, if the bridge 24 at the lower weakened line 10 has not already been broken, the bridge 24 is broken and the lower part 16 of the skirt wall 6 is stripped away from the pilfer-proof zone 14. After this, the fractured bridge 20 in the upper weakened line 8 is fractured, and at the same time,
The axial weakening line 26 formed in the pilfer-proof zone 14 is broken. In this way, as shown in FIG. 3, the pilfer-proof band 14 is opened from an endless ring shape to an endless strip shape and deformed into a substantially spiral shape.
The annular locking jaw 38 of the mouth portion 32 is disengaged. On the other hand, the high-strength non-breakable bridge portion 20a in the upper weakened line 8
is maintained without being broken, and the pilfer-proof zone 14 is connected to the skirt wall 6 via the high-strength non-breakable bridge portion 20a.
continues to be connected to part 12 of. After the pilfer-proof strip 14 has been opened in the form of an end strip and released from the annular locking jaw 38 of the mouth 32, the entire container lid 2 except the cut-off lower part 16 of the skirt wall 6 is removed. teeth,
Free with rotation” - raised, thus mouth and neck 3
2 and the oral part 32 is opened. The cut-off lower part 16 of the skirt wall 6 remains in the mouth and neck region 32.

Once the unsealing operation as described above is performed, the traces thereof will be clearly displayed on the container lid 2. To explain this point in detail, the container lid 2 once removed from the mouth and neck part 32 (
(excluding the lower part 16 of the skirt wall 6 remaining in the mouth and neck area 32)
In this case, the pilfer-proof strip 14 is significantly deformed into a substantially helical end strip shape. It is extremely difficult, if not impossible, to modify the pilfer-proof band 14 into a shape that approximates the original endless ring shape. Therefore, when the container lid 2 (excluding the lower part 16 of the skirt wall 6) which has been once detached from the mouth part 32 is again screwed onto the mouth part 32, there will be a significantly deformed pilfer-proof zone 14. - It is very clearly displayed that the unsealing operation has been performed. On the other hand, before screwing the container lid 2 detached from the neck part 32 (excluding the lower part 16 of the skirt wall 6) to the neck part 32, the remaining high-strength unbreakable bridging part 20a, which appears to be broken, is Pilfer proof strip 1 that was forcibly broken and significantly deformed
4 from the upper part 12 of the skirt wall 6 may also be provided. However, when the container lid 2 having the top wall 4 and the part 12 of the skirt wall 6 is screwed onto the mouth and neck part 32 again after the pilfer-proof strip 14 is cut off, the mouth and neck part 32 is screwed on again, as clearly shown in FIG. A relatively large annular gap 42 corresponding to the pilfer-proof zone 14 is formed between the lower part 16 of the skirt wall 6 where it remains at 32 and the upper part 12 of the skirt wall 6 in the screwed container lid 2 . exists, and the mouth and neck portion 32 is exposed to the outside in such an annular gap 42. Therefore, in this case as well, it is very clearly displayed that the unsealing operation has been performed once.

<Effects of the Invention> As detailed above, according to the container lid constructed according to the present invention, - once the opening operation is performed, such traces are clearly displayed without the need for careful observation; Therefore, the pilfer-proof property is sufficiently guaranteed without calling for special attention.

[Brief explanation of the drawing]

FIG. 1 is a side view, partially in section, of a preferred embodiment of a container lid constructed in accordance with the present invention. FIG. 2 is a side view, partially in cross section, of the container lid shown in FIG. 1 attached to the mouth and neck of the container. FIG. 3 is a side view showing a portion of the container lid of FIG. 1 that has been separated from the opening of the container by the opening operation. FIG. 4 is a side view showing a state in which the portion of the container lid shown in FIG. 3 is reattached to the mouth and neck of the container after the pilfer-proof band has been cut off. 2...Container lid 4...Top wall 6...Skirt wall 8...Upper weakening line 10...Lower weakening line 12... ... Upper part of the skirt wall 14 ... Pilfer proof band 16 ...
- Lower part of the skirt wall 18... Slit 20 of the upper weakening line...
...Broken bridging portion 20a of the upper weakened line...
High-strength non-breakable bridging portion 22 of the upper weakened line...
Slit 24 in the lower weakened line... Fractured bridging portion 26 in the lower weakened line... Axial direction weakened line Figure 1 Figure 2 "0 Picture size ridge

Claims (1)

[Claims] 1. It has a top wall and a cylindrical skirt wall that hangs down from the periphery of the top wall, and the skirt wall has upper weakening lines extending in the circumferential direction at intervals in the axial direction. and a lower weakening line, and the skirt wall includes an upper portion located above the upper weakening line, a pilfer-proof zone between the upper weakening line and the lower weakening line, and a pilfer-proof zone between the upper weakening line and the lower weakening line; and a lower part located below the line, and the upper weakened line is configured so that it can be broken during an opening operation except for at least one high-strength unbreakable part, and the lower weakened line The pilfer-proof band is configured such that it can be broken in its entirety when the container lid is attached to the mouth and neck of the container or when the opening operation is performed, and the pilfer-proof band has an axially extending portion that can be broken during the opening operation. A container lid with pilfer-proof properties, characterized in that it is formed with at least one extending axial line of weakening. 2. The upper weakened line consists of a plurality of slits extending in the circumferential direction at intervals in the circumferential direction, and a plurality of bridging parts located between the slits, and at least one of the bridging parts 1 is a high-strength non-breakable bridge part constituting the high-strength non-breakable part, and the remaining bridge parts are low-strength breakable bridge parts,
A container lid according to claim 1. 3. The lower weakened line consists of a plurality of slits extending in the circumferential direction at intervals in the circumferential direction, and a plurality of bridging portions located between the slits, and all of the bridging portions are made of low-strength material. The container lid according to claim 1 or 2, which is a broken bridge. 4. The container lid according to any one of claims 1 to 3, wherein the axial weakening line consists of a score. 5. Claim 1 formed from a thin metal plate
The container lid according to any one of items 1 to 4.