JP2810936B2 - Plastic lid device to reveal opening - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging structure for clarifying opening, that is, for clarifying that the opening has been completed. 2 against the container to enhance
One embodiment relates to a plastic lid device that reveals an opening that functions to cause interference.

Prior Art and Problems to be Solved by the Invention The container is provided with a lid device for clarifying the opening, that is, for clarifying that the container has been opened, and thereby the lid device is partially or To be able to clearly see the changes caused by the complete removal,
This is what all consumables want. Typically, such a closure comprises a top cap and a depending pilfer band arranged to interfere and cooperate with the container to which the closure is attached. You. The opening band is broken and / or separated from the lid device by removing the lid device, so that it is possible to clearly recognize that the container has been partially or completely opened. It is typically formed in a shape that is similar to:

As will be appreciated, it is desirable that the plastic lid device that reveals the opening be as far as possible prevented from being opened without leaving any visible signature. For this reason, the plastic lid device of the present invention has been made as a specific shape that can be manufactured economically and effectively so that it can be used for existing containers, has a high prevention effect against opening, and has a high performance. It is consistent and reliable, and has a high variety that can be used for a wide variety of foreign containers.

SUMMARY OF THE INVENTION The present invention typically discloses a plastic opening for a container having an annular securing ring positioned adjacent to the underside of a thread formed in the neck of the container. The present invention relates to a lid device. In order to reveal the opening, the lid device includes an opening band having a plurality of inwardly projecting flexible tabs. The stopper band further includes cooperating interference beads located below the flexible tabs. In particular, the opening band functions to provide two ways of interacting with the container retaining ring for revealing the opening.

In accordance with the present invention, a plastic lid device for revealing an opening according to the present invention includes a plastic cap having a circular top wall and an annular depending cylindrical skirt. In the embodiment shown, the skirt has an internal thread and the thread is associated with the lid so that the lid is retained on the container after the lid is attached to the container. Cooperating with a mating thread formed in the neck of the container.

The lid device of the present invention further includes an annular integrally formed opening band hanging from the skirt portion of the cap of the lid device. The stopper band is at least partially detachably connected to the skirt of the cap by a plurality of circumferentially spaced brittle ribs. In the illustrated embodiment, these frangible ribs extend between the inner surface of the skirt and the inner surface of the stopper band. Otherwise, the skirt and opening band are distinguished and separated from each other by a circumferential score line partially extending inside the fragile rib.

The stopper band includes an annular band portion and a plurality of circumferentially spaced inwardly projecting flexible tabs that extend inwardly of the annular band portion. Are there. In particular, the opening band further includes an annular interference bead extending entirely inside the annular band portion. The interference bead is located below the inwardly projecting flexible tab.

Such a structure provides two aspects of interference between the flexible tab and the annular retaining ring of the container with respect to revealing the opening. During the installation of such a lid device on the container, their flexible tabs are bent upwardly into a displaced position as the opening band is moved down over the screw and the fixing ring of the container. . When the lid device is fully attached to the container, these flexible tabs are moved over the container retaining ring and, furthermore, project inward and in memory as they are remembered because of their elasticity. As a result, a state is established in which the projection is formed at an angle upward and inward as a whole with respect to the annular band portion. With the flexible tabs arranged in this manner, the flexible tabs are positioned for interference engagement with the generally downwardly facing surface of the container retaining ring. As a result, this first
In the interference of the above aspect, the free end of the flexible tab engages the locking ring to releasably at least partially connect the opening band to the cap skirt in the lid device. The brittle ribs are broken.
In this way, a clear recognition by eyes is made possible.

In a second mode of interference, the flexible tab cooperates and interacts with the interference bead of the opening band and again engages and interacts with the container locking ring.
In this mode of operation, the flexible tab is secured to the container when the flexible tab is at an angle to the annular band portion of the opening band and projects downward and inwardly. It can be engaged with the ring. In such an orientation, the flexible tab is engageable with the retaining ring by being disposed between the container retaining ring and the annular interference bead. These flexible tabs and interference beads are dimensioned with respect to the container retaining ring to resist opening of the lid device, thereby breaking the fragile ribs connecting the opening band to the skirt. To do so. Again, this achieves a clear opening or visual recognition of the opening.

According to another illustrated embodiment of the lid device of the present invention, a score bead is provided. The score bead extends circumferentially on the inner surface of the lid device, and while forming a circumferential score line that distinguishes the opening band from the skirt of the lid device, the bead of the lid device is formed. Works desirably to support the inside. Further, at least some frangible ribs in this configuration can be formed to extend on the inner surface of the stopper band between adjacent flexible tabs. Such ribs function desirably to center the opening band with respect to the retaining ring on the container to be assembled, thereby further enhancing the action against opening. If desired, a plurality of circumferentially spaced prestressing projections can be provided on the inner surface of the stopper band. These prestressing projections can engage the container securing ring to prestress the fragile ribs connecting the opening band to the skirt in the lid device. Such a prestressed structure can desirably promote the breaking of brittle ribs when intended.

Many other features and advantages of the present invention will be readily apparent from the following detailed description, the accompanying drawings, and the appended claims.

Embodiments While the invention is susceptible of various embodiments, embodiments that are presently considered to be preferred are illustrated in the drawings and described below. This disclosure is to be considered as illustrative of the present invention and is not intended to limit the present invention to the particular embodiments illustrated.

Referring to FIG. 1, there is shown a plastic lid device 10 embodying the principles of the present invention. The lid device 10 can be formed by various injection molding and compression molding techniques. Also, the lid device 10 can be formed by the compression molding technique taught in U.S. Pat. No. 4,497,765, which technique is incorporated herein by reference.

As shown, the lid device 10 includes an upper generally cap-shaped lid cap 12. This lid cap 12
Includes a circular top wall 14 and a depending annular cylindrical skirt 16. The skirt 16 is preferably provided with an internal thread 18 which is cooperatively engaged with a thread T of an associated container C to which the lid device is mounted. If desired, the plastic lid device may include an associated seal liner, such as the seal liner illustrated in the above referenced patent.

The lid device of the present invention further includes an annular opening band 20 depending from the lid cap skirt portion 16 and at least partially connected to the skirt portion so as to be separable.
Contains. Opening band 20 is a continuous annular band portion arranged substantially vertically aligned with skirt portion 16
Preferably it contains 22. In the preferred embodiment, the stopper band is releasably at least partially connected to the skirt by a plurality of circumferentially spaced brittle ribs 24. These fragile ribs 24 extend between the inner surface of the skirt 16 and the inner surface of the band 22 at the opening band. As shown, the stopper band 20 is otherwise distinguished and separated from the skirt 16 by a circumferentially extending score line 26.

U.S. Patent Specification No. 4, individually incorporated by reference.
According to the teaching of 418,828, the score line 26 and the frangible rib 24 cooperate with each other to establish the desired frangible connection between the opening band 20 and the lid cap 12. In particular, the lid cap
The 12 and stopper band 20 are formed integrally with each other during molding, and ribs 24 are molded on the inner surface of the skirt and the inner surface of the stopper band. Thereafter, a score line 26 is formed. This is preferably formed using a score line cutting edge. In this manner, the opening band 20 can be distinguished and separated from the skirt portion 16 by the score line 26 partially extended into the inside of the rib 24.

With such a structure, the "remaining" portions of the brittle ribs 24 where no cut lines are formed cooperate to form a brittle connection between the opening band and the skirt. If desired, one integral connection may be formed between the opening band and the skirt (eg, score line).
26, so that the band remains open after the rib breaks, even after the rib breaks. In connection with such a connection, one or more breakable area portions are formed in the opening band itself, whereby the opening band is torn when the lid is removed from the associated container. Can be broken.

Referring to the shape of the opening band 20, the lid device of the present invention is specifically shaped to produce a very high degree of opening resistance, and is particularly susceptible to interference with the mating container. It provides two distinct modes of separation. To this end, the stopper band includes a plurality of circumferentially spaced inwardly projecting flexible tabs 28. These flexible tabs 28 project inward from the annular band portion 22 of the opening band. In the current embodiment,
Twelve equally spaced tabs 28 are provided around the circumference of the stopper band. Each tab is approximately 0.6096mm (0.
024 in) and a width in the range of about 0.3048-0.508 mm (0.012-0.020 in). According to this configuration, the free ends of adjacent tabs 28 are closely spaced (about 0.508 mm) when they protrude horizontally inward.
(Interval of (0.020 in)). The orientation in which the tabs protrude inward in the horizontal direction is indicated by dotted lines, and represents a preferred orientation when molding the flexible tab 28.

As will be further described, these flexible tabs 28 cooperate with the annular locking ring portion L of the container C to cause the breakage of the ribs 24, thereby providing the desired opening feature. It is. In the first mode of interference and breakage, the free end of the flexible tab is engageable with the locking ring L. In the second embodiment of the break, the flexible tab is shaped to cooperate with an annular interference bead 30 provided on the bottom edge of the annular band portion 22 of the opening band 20. I have. To this end, the interference bead 30 is located below the flexible tab 28. The inward edge of the top of the interference bead is positioned relative to the flexible tab, the edge adapted to engage the tab in a second fractured manner. In a preferred configuration, the inside diameter of the interference bead is approximately equal to the inside diameter formed by the cooperating inner surfaces of the circumferentially spaced brittle ribs 24,
It is made slightly smaller.

With reference to FIG. 3, the function of the lid device of the present invention will be described. When attaching this lid device 10 to a related container,
The flexible tab 28 is engaged with the container C, and as the opening band moves downward with respect to the threaded portion T of the container and the container fixing ring L, the flexible tab 28 is directed to the upwardly extending departure position. Is moved upwards as a whole. To this end, the flexible tabs 28 may be of a thickness approximately equal to the radial dimension of the fragile ribs 24, or other shapes such that the dimensions of the aggregates are approximately equal to the inner diameter formed by the ribs 24. It is said.

When the lid device is fully attached to the container, the flexible tab 28 moves past the container retaining ring L, and then the angle as shown in FIG. 4 due to the elastic memory characteristics of the plastic. Thus, a state of projecting upward and inward as a whole is established. The flexible tab 28 is now in a first interfering and breaking position cooperating with the container securing ring. In particular, as the lid is unscrewed and moved upward relative to the container, the generally upwardly and inwardly projecting flexible tab 28 will be pressed against the container securing ring L. This interference engagement with the container fixing ring acts against the upward unscrewing of the lid device, which causes the flexible ribs 24 to be stressed and broken. When the ribs 24 are broken, it is clearly visible that the opening band 20 has been separated from the skirt portion 16, thereby clearly indicating that the container has been opened.

In the present embodiment, each of the flexible tabs 28 has a generally planar shape and is 0.3048-0.508 mm (0.012-0.02 mm).
0 in). However, it will be apparent that each of the flexible tabs 28 is of sufficient thickness from its free end to the base where it is joined to the band 22, to increase the resistance to crushing and deformation to secure the locking ring. Preferably, it is arranged to produce the desired interference with L. To this end, each of the tabs 28 has a slightly curved non-planar shape when viewed in a cross-section perpendicular to the length of each tab, or similarly has a generally inclined angle. Alternatively, it can be formed in a synthesized shape. As will be appreciated, such an arrangement increases the "longitudinal strength" of each flexible tab and serves to provide the desired interference engagement with the retaining ring L.

According to the present invention, the flexible tab 28 is shaped to cooperate with the interference bead 30 to create a second alternative interference engagement with the container securing ring L. If the flexible tab 28 is displaced from an upwardly and inwardly angled position (this is preferably prohibited by the inwardly protruding bead 30, for example, an incorrect operation) The flexible tab establishes a downwardly and inwardly projecting state at an angle as shown in FIG. When the tabs are oriented in this manner, they are positioned between the container retaining ring L and the upper inner edge of the interference bead 30 to cause engagement with the container retaining ring L. It is positioned as follows. In this way, these tabs cooperate with each other in cooperation with the interference bead to re-establish the interference interaction with the container fixing ring, thereby at least partially separating the opening band 20 from the skirt 16. As a result, the brittle rib 24 is broken. This effect is shown in FIGS. 6a and 6b. No.
In FIG. 6a, the flexible tab 28 is shown between the retaining ring L and the interference bead 30, and FIG. 6b shows the subsequent brittle rib.
24 shows the break along 24 and the separation along the score line 26.

Referring to FIG. 7, there is shown another embodiment of the lid device for revealing the opening according to the present invention. In many respects, this embodiment is the same as the previously described embodiment. However, the lid device shown in FIG. 7 is provided with a seal liner 15 so as to approach the top wall portion 14, and the bleed groove 17 extends across the inner screw portion 18. It is noted that 17 extends to the inside of the cylindrical skirt 16 of the lid device. Providing one or more intake grooves 17 allows for the release of gas pressure upon removal of the lid device when the lid device of the present invention is used in connection with a container having carbonated content or the like. To facilitate.

As in the previously described embodiment, the lid device 10 includes an opening band 20. The stopper band 20 is distinguished from the skirt 16 by a circumferentially extending score line 26 and is at least partially separated from the skirt. In addition, the stopper band 20 has a plurality of (currently preferred 12) circumferentially spaced inwardly projecting flexible tabs 28,
This is also shaped to create a double or two mode of interference with the locking ring of the associated container.
For this purpose, an inwardly projecting interference bead 30 is
And the second with the container to be combined
Tab 28 is an interference bead in the interaction of the lid device of the embodiment.
30 to be engaged.

In this embodiment, the stopper band 20 and the skirt 16
The brittle connection between is formed by a plurality of circumferentially spaced brittle ribs 124. The fragile rib 124 extends between the inner surface of the skirt and the inner surface of the stopper band. Importantly, at least some frangible ribs 124 extend along the inner surface of band 22 at stopper band 20 between adjacent mating flexible tabs 28.
In the illustrated embodiment, each of the illustrated brittle ribs 124 has such a shape.

This shape of the fragile rib 124 has the desired effect of centering the opening band 20 with respect to the container fixing ring L in the combined container C. Due to the brittle rib 124 having such a shape, when the lid device 10 is completely attached to the container to be combined, a very slightly limited gap is formed between the container fixing ring L and the brittle rib 124. It will be given between the face toward the direction. This has the desirable effect of increasing the resistance to being unplugged. This is because the fragile ribs 124 act in this manner to prevent the stopper band 20 from deforming out of the rolled state, thereby providing the fragile ribs.
This makes it substantially impossible to remove the opening band from the combined container without breaking 124. Similar to the brittle ribs 24 described above, the ribs 124 are score lines partially extended into the ribs by at least some amount.
It is made to be broken by 26.

In the embodiment of FIG. 7, means are provided for facilitating the formation of the score line 26 efficiently, accurately and easily. In particular, this embodiment includes a score bead 127 extending circumferentially on the inner surface of the lid device. Preferably, the score bead 127 extends continuously along the inside of the lid device. Circumferential score line 26
Is positioned below this score bead.

In processing the score line of the lid device of the present invention, it is preferable to use a score line processing mandrel inserted into the lid device. A score line cutting knife or the like is then applied to the surface of the lid device. In order to perform high-speed machining, it is currently preferred that the scoring knife is based on a scoring mandrel arranged inside.

Therefore, it is preferable to position the lid device in a substantially fixed position on the score line processing mandrel so as not to cause excessive deformation or deviation when machining the score line. In other methods, inaccurate score lines will be machined.

In this manner, the score line bead 127 is shaped to safely engage and seat with the score line mandrel. This allows highly efficient and accurate machining of the score line 26 to be easily achieved with the desired degree of partial cut in the fragile rib 124.

As in the previously described embodiment, the flexible tab 28 has a fragile rib.
It is preferably formed with a thickness approximately equal to the radial dimension of 124. This preferred dimensional relationship is:
The tab 28 allows the inside of the lid device to be supported as desired when performing the score line processing without the score line bead 127. (Tab 28 flexes upwardly against the inner surface of the lid device).

Effective and accurate score line processing is achieved with adjacent tabs
This is further facilitated by placing brittle ribs 124 between the 128. Such an arrangement eliminates the possibility of one of the tabs 128 overlapping adjacent brittle ribs 124 (e.g., caused by deforming or extending the flexible tab upon removal from the molding apparatus). Further, the shape of the extended brittle rib 124 is such that the score line 26 is
To be positioned relatively close to the bottom edge of the vehicle. This desirably enhances the pull-out prevention function of the lid device according to the invention. This is because any improper operation or opening will more likely destroy one or more of the fragile ribs 124.

Yet another feature of the embodiment of FIG. 7 is that each brittle rib 12
4 relating to forming the upper part 125. The upper portion 125 extends along the inner surface of the skirt portion 16 above the cut line bead 127. This shape of the brittle ribs has been found to desirably increase the longitudinal strength of the entire lid device.
This facilitates high speed injection from the associated molding equipment.

Referring to FIG. 8, there is shown still another embodiment of the lid device of the present invention. In most respects, this embodiment is similar to the embodiment shown in FIG. However, the embodiment of FIG. 8 does not include the score bead 127. Not having this score bead, together with the extended shape of the fragile rib 124 (having the upper portion 125), can enhance the gas bleed performance of the lid device.

Two additional features of the embodiment of FIG. 8 must be noted. First of all, this embodiment of the closure device for revealing the closure according to the invention comprises a closure band 20 and a skirt 16.
The structure includes a structure that applies a prestress (initial stress) to a brittle connecting portion formed by the brittle rib 124 therebetween. In particular, a plurality of circumferentially spaced prestress projections 131 are provided on the inner surface of the band portion 22 of the opening band 20. In the illustrated embodiment, and also in a preferred configuration, these prestressing projections 131 are each located on a corresponding one of the brittle ribs 124. In the illustrated embodiment, these prestressing projections
Although 131 is provided on every other brittle rib 124, fewer or more protrusions 131 may be provided as well.

Protrusions 131 can be provided to pre-stress the fragile ribs 124 for both attachment and removal of the lid device. During attachment of the lid device to the associated container, these projections 131 engage with the container fixing ring L, thereby acting to spread the opening band 20 and "bell-shaped" with its attachment. be able to. This action serves to weaken the uncut portion of each of the fragile ribs 124, thereby easily causing the fragile ribs to break as intended upon removal of the lid device. Eggplant

Furthermore, the prestressing projection 131 cooperates with the fixing ring when removing the lid device. In particular, this occurs because when the tab 28 is projected downward at an angle and placed between the container fixing ring L and the interference bead 30, it stresses the rib 124 and breaks it. is there. In conjunction with this action, the projections 131 cause further interference with the container securing ring, thereby applying additional stress to the brittle ribs 124, ensuring that the ribs break and break.

Still another feature of the embodiment of FIG. 8 relates to the shape of the stopper band 20 that causes the band portion 22 to break. This, as described above, relates to forming an unscored connection such that the opening band is integrally connected to the skirt 16 after the rib 124 has been broken. Usually desired. However, according to such a structure, the stopper band remains connected even if it is partially separated from the skirt portion 16.

For this purpose, FIG. 8 shows a vertical cut line with an opening band.
20 shows that it is preferably formed. In particular, the outer scoreline processing knife may be applied to the opening band to form one or more scorelines extending to a depth as indicated by the dotted line 133. preferable. Such a vertical score line is provided between one flexible tab 28 and an adjacent fragile rib 124, tab 2
It is formed so as not to extend inside any of the ribs 8 and the ribs 124.

Notably, this vertical score line extends into the interior of the interference bead 30 rather than being a partial and full length,
As a result, the remaining portion 13 of the opening band that can be broken
Made to form five. This arrangement maintains the desired degree of the opening band, allows for fast mounting, and ensures that the opening band breaks as intended.

Therefore, a high degree of performance against opening is provided by the lid device of the present invention. As will be realized, various modifications and extensions can be made from the illustrated embodiment. For example, a flexible tab
The number, spacing, thickness and shape of the 28 can be varied and selected while maintaining the basics disclosed herein. Similarly, the annular interference bead 30 may be formed substantially continuous, and may be adapted to add additional circumferential hoop strength to the lid device, or may be split or otherwise divided. The annular beads can be alternately used. Further, while the invention has been illustrated as an all-in-one piece plastic lid device, the lid device according to the present invention may be of a composite structure, such as a composite metal and plastic lid device. (A separate seal liner may be provided or omitted).

Referring to FIGS. 9-11, yet another embodiment of the plastic lid device 10 for revealing the opening is shown.
According to the previously described embodiment, this plastic lid device
10 includes a cap-shaped lid cap 12;
Includes a circular top wall portion 14 and a depending annular cylindrical skirt portion 16. The skirt 16 is provided with an internal thread 18. As shown in FIG. 9, the lid device 10 is intended to be mounted on a container C having an external bead-shaped fixing ring L. This fixing ring L extends circumferentially around the neck of the container at right angles to the vertical axis of the container. The fixing ring L is positioned immediately below the external thread portion T of the container.
Has a grip portion or handle H.

In this embodiment, the lid device is an annular opening band 20.
This stopper band is hung from the skirt portion 16. The band 20 is detachably connected at least partially to the skirt 16 by a plurality of circumferentially spaced breakable bridges 24. This breakable bridge is described in U.S. Pat.
As disclosed in U.S. Pat. No. 4,418,828, the inner surface of the opening band and the inner surface of the skirt are alternately provided substantially along the inner surface.

The opening band 20 includes an annular bead-shaped interference lip 30, which extends circumferentially along the inner surface of the lid device 10. Notably, the interference lip 30 does not extend at right angles to the vertical axis of the lid device 10, but extends in a plane disposed at an acute angle to the vertical axis of the lid device. In a preferred form, this plane is disposed at an acute angle with respect to the axis of the lid device in the range of about 1 ° to about 5 °. This interference lip extends continuously in the circumferential direction along the inner surface of the stopper band 20 as shown in the figure, but the lip 30 may be provided as a series of divided portions, lugs and other projections. It has to be recognized that they can also be formed so as to extend discontinuously along the inner surface. Whether the interference lip 30 is continuous or discontinuous, it is assumed that the lip extends at an angle to the vertical axis of the lid system, i.e., not perpendicular.

Since the interference lip 30 is inclined with respect to the axis of the lid, a non-circular engagement state is established between the interference lip and the container fixing ring L when the lid member is attached and detached. Therefore, the stress generated in the lid device is not uniform in the circumferential direction of the lid device.

This non-uniform stress distribution during installation
20 is transformed into a non-circular shape deviating from the round state. That is, it is deformed into an almost elliptical or elliptical shape. Such a deformation of the opening band makes it possible for the interference lip to easily move over the fixing ring L when attaching the lid device to the container, thereby reducing the force required for the attachment and breaking it. The stress generated in the bridge 24 is reduced to a minimum. Upon removal of the lid device, the interference lip 30 again engages the container securing ring L, causing non-uniform stress on the opening band 20 and, in particular, the breakable bridge.
24 generates a stress that promotes rupture. When removing the lid device, the top wall 14 of the lid device of the interference lip 30
Is first engaged with the fixing ring L of the container. As a result, a local stress is generated at the first engagement position. In this way, the breakage of the bridge 24 is promoted.

In order to prevent the interference lip 30 from slipping on the fixing ring L without breaking the bridge 24 when removing the lid device, there is provided a means for preventing the stopper band 20 from becoming non-circular in shape. It is desired. For this purpose, a plurality of centering ribs 26 arranged at intervals in the circumferential direction are provided on the inner surface of the stopper band 20 at a position above the interference lip 30. These centering ribs 26 are positioned to engage the container fixing ring L upon removal of the lid device, thereby maintaining the opening band in a circular shape.

As will be appreciated, other suitable forms of centering means may be used. For example, a continuous ring may be provided inside the lid device, or an area having a relatively reduced inner diameter may be provided immediately above the interference lip. Essentially, such a centering means is an interference lip.
Is considered to be provided to engage the locking ring and prevent the opening band from becoming non-circular in shape, thereby ensuring that the intended breakage of the bridge 24 is achieved.

From the foregoing, it will be appreciated that various changes and modifications can be made without departing from the spirit and novel scope of the invention. It is to be understood that no limitation on a particular embodiment is intended, ie, should be inferred as such. This disclosure is intended to cover all such changes as fall within the scope of the appended claims.

[Brief description of the drawings]

FIG. 1 is a side elevational view, particularly in cross section, of a plastic lid device revealing an opening embodying the principles of the present invention mounted on a combined container. FIG. 2 is a cross-sectional view of the lid device revealing this new opening. FIG. 3 is a cut-away side elevation view, particularly in cross section, showing the installation of the new lid device on the container to be assembled. FIG. 4 is a cutaway elevational view in cross-section similar to FIG. 3 showing the lid device in a position of interfering engagement of the first aspect with the container after being attached to the associated container. . FIG. 5 is a cutaway elevational view in cross-section similar to FIG. 4, showing the lid device at a location where the combined container and the second embodiment will be in interference engagement. FIGS. 6a and 6b further illustrate that the lid device performs the second mode of interference engagement with the associated container.
FIG. 2 is a side elevational view of a fractured side with a cross section similar to the figure. FIG. 7 is a cutaway cross-sectional view showing another embodiment of the plastic lid device for revealing the opening of the present invention. FIG. 8 is a cutaway cross-sectional view similar to FIG. 7, showing still another embodiment of the plastic lid device for revealing the opening of the present invention. FIG. 9 is a cutaway side elevational view of yet another embodiment of a lid device for revealing the opening. FIG. 10 is a cross-sectional view of the lid device shown in FIG. FIG. 11 is a cross-sectional view taken along line 11-11 of FIG. 10 ... lid device, 12 ... lid cap, 14 ... top wall, 16 ...
... Skirt part, 18 ... Inner thread part, 20 ... Opening band, 22
… Band part, 24, 124… brittle rib, 26… cut line, 28… flexible tab, 30… interference bead, 127… cut line bead, 128… tab.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65D 55/02 B65D 41/34

Claims (9)

(57) [Claims] 1. A plastic closure device (10) for revealing an opening for a container with an annular fixing ring, comprising a top wall (14) and an annular depending cylindrical skirt (16). A) a plastic cap (12) having an annular cap which is depending from said skirt (16) and is detachably connected to said skirt (16) at least partially fragile by rib means (24, 124). Band (2
0), wherein the opening band (20) is provided with an annular band portion (22) and a plurality of inwardly projecting flexible tab means (28) spaced circumferentially. And an annular interference bead (30) disposed below the flexible tab means (28) and protruding inward from the bottom edge of the annular band (22); (1) The flexible tab means (28) projects at an angle upward and inward of the annular band portion (22) so as to break the brittle rib means (24, 124). And (2) the flexible tab means (28) is angled downward and inwardly of the annular band (22) so as to break the fragile rib means (24, 124) and generally When protruding and positioned between the annular retaining ring and the interference bead (30), the flexible A closure opening plastic closure device, wherein the closure means (28) is engageable with the retaining ring of the container. 2. A plastic lid device (10) according to claim 1, wherein said brittle rib means (24, 124) is provided on an inner surface of said skirt portion (16) and said opening band (10). 20) Annular band part (2
2) a plurality of brittle ribs extending between the inner surfaces (24,124)
And said stopper band (20) is provided with said skirt portion (16) by means of a circumferentially extending score line (26) extending partially inside their fragile ribs (24,124).
Plastic opening device, characterized in that it is distinguished from the skirt and is at least partially separated from the skirt (16) by the score line (26). 3. A plastic closure device (10) according to claim 2, wherein each of said flexible tab means (28) is provided with said fragile ribs (24,1).
24) has a thickness approximately equal to the radial dimension of,
A plastic lid device for revealing opening. 4. The plastic closure device of claim 1, wherein each of said flexible tab means (28) is about 0.3048-0.508 mm.
A plastic lid device for revealing an opening having a thickness in the range of (0.012 to 0.020 in). 5. A plastic closure device as set forth in claim 1, wherein said closure device is openable and engages with said container securing ring for centering said closure device (10) on a container. A plastic lid device for revealing the opening, characterized in that it comprises a dispensing means (124). 6. A plastic lid device according to claim 5, wherein said brittle rib means (124) is provided on an inner surface of said skirt (16) and on said opening band (20). Annular band part (22)
A plurality of circumferentially spaced brittle ribs (124) extending between the flexible tab means (28) and the centering means (124) adjacent to the flexible tab means (28). A plastic lid device that reveals an opening, comprising at least some portions of said fragile ribs (124) extending therebetween. 7. A plastic lid device (10) according to claim 2, wherein said lid device (10) is uncovered when said circumferentially extending score line (26) is formed. Cut-off bead means (127) extending circumferentially around said lid member (10) to support the inside of said lid member (10); apparatus. 8. A plastic lid device (10) according to claim 2, wherein said plastic lid device (10) is provided with a pre-stress applying means (131) for applying an initial stress to said brittle rib (124). Then, open the band (2
0) includes a plurality of circumferentially spaced prestressing projections (131) formed on the inside of each of the friable ribs (124). The prestressing projections (131), which are provided corresponding to each other, are engagable with the container fixing ring for prestressing the fragile ribs (124). Means (13
1) A plastic lid device for revealing an opening, comprising: 9. A plastic closure device for revealing a closure according to claim 1, wherein said closure band (20) forms a breakable residual portion (135) thereof. A plastic closure device that reveals a closure, comprising at least one vertical score line (133) partially extended inside the interference bead (30).