DE3441431A1 - PLASTIC CAP AND DEVICE FOR THEIR PRODUCTION - Google Patents

Description

PRINZ, LEISER, "BUNKE & PARTNER

atent Atto

Stuttgart

Patent Attorneys European Patent Attorneys

Munich Stuttgart 3 A 4 1 4 3 1

Anchor Hocking Corporation November 13, 1984 109 North Broad Street
Lancaster, Ohio 43130, USA

Our reference: A 1934

Plastic cap and device for its manufacture

The invention relates to molded plastic caps for containers and packs, such as those used for food or the like. In particular, the invention relates to a closure cap with an integrally formed band, which any

Identifies interventions and when the container or the like is normally closed together with the closure cap is applied to the container. If anyone tries to open the container or the package without authorization, 10

or if the closure cap is completely or partially removed due to damage during transport or when classifying the goods in shops, the tape steps with stops working together with it on the container engaged / which tear the tape from the closure cap.

There are a number of caps of such a general type, either aluminum caps or plastic closures made in a mold. The aluminum locks usually require while Closure of the pack special operation when the tapes indicating an intervention open at the end rolled onto the container. The previously known, cast-made closure caps with interventions Marking tapes are applied directly to the fastener when the fasteners are on the Container are screwed on. Such closures pose problems. For example, there are closures with score lines delimiting the tape or other predetermined breaking lines, manufacturing difficulties. trouble were also found when using special notching agents or with tools for cap production, which require a large number of tool parts.

Finally, it was found in the manufacture of such closure caps also a particularly high level of tool wear.

The closure cap according to the invention eliminates these difficulties by an improved design, which simplifies the manufacture and casting of the cap and requires only relatively simple molding tools. At the same time, the invention provides a closure cap which can easily be removed without injury or premature breakage of the Tape can be applied. The tape after the

^ 5 underlying invention has a clear, an intervention indicating Effect so that for everyone an intended

'~ j

or accidental interference in the closure is recognizable.

Accordingly, the object of the invention is to provide a fifth

improved, molded plastic closure, which indicates unauthorized or accidental interference. Another object of the invention is to provide an easy-to-manufacture molded plastic closure that prevents unauthorized or accidental tampering indicates. Another object of the invention is to provide such a closure that does not require premature Separation of a tamper-evident tape can be easily applied. After all, it is up to the job the invention the creation of such a closure,

which is reliable and insensitive to damage.

Other and further objects of the invention emerge from the exemplary embodiments shown in the drawing of the invention from which those skilled in the art still

In addition, advantages not mentioned here can be recognized.

In the drawing are:

Fig. 1 is a perspective view of one with a closure cap
Container,

Closure cap closed according to the invention

Fig. 2 is an exploded view of the closure cap prior to its application to a Be-30

container,

3 shows an enlarged side view of the container according to FIG. 1,

Fig. 4 is a horizontal section along line 4/4 in

Figure 3,

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* Fig. 5 is an exploded view of that of the cap removed from the container,

6 shows an even further enlarged section along line 6/6 in FIG. 5,

Fig. 7 is a vertical section along line 7/7 in Fig. 5.,

8 shows a vertical section through a preferred embodiment of a device for injection molding production a closure cap according to the invention,

9 is an enlarged vertical section of part of the device according to FIG. 8,

Fig. 10 is a horizontal section along line 10/10 in

Figure 9 and
20th

11 is a vertical section through another embodiment the molding device.

The invention relates to a one-piece molded closure cap for containers made of glass or plastic or other containers. The closure cap has an integral band that indicates any interference with or damage to the closure. As will be described in detail below, the tamper evident tape is formed simultaneously with the remainder of the cap. The tape is released bar to the lower part of the cap shell is attached. It cooperates with parts located at the mouth of the container so that it is torn off _and falls off the cap shell when the closure cap is rotated when it is removed. This reliable

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Casually occurring detachment of the tape indicates immediately if anyone intentionally or accidentally removed the cap loosens. There is thus a sure sign that the pack closure is no longer in It's okay when someone has partially or completely removed the lock. Such an ad will the end user is protected and he can reject suspicious packs and a pack with reliable ones and choose an undamaged lock. 10

The preferred embodiment of the closure cap 1 has a cover 2 and a jacket 3 hanging thereon as well one on the lower edge of the jacket 3 seated in one piece, downwardly extending band 4, for

¹ ^ show any deliberate or accidental tampering with the lock. The inner surface of the cap shell 3 has means to be brought into engagement with the container, such as continuous threads 5 or others in connection with the container by rotation.

^ O mende parts. At the top of the container 7 are corresponding means for connection to the closure, such as, for example, continuous threads 6 or others Engaging means, which by rotation with the closure to

connect are.
25th

A collar 8 cooperating with the belt 4 is located at the upper end of the container 7 below the Threads 6. The outwardly protruding rim 8 has a number of spaced apart Stops 9, which protrude radially outward and with stops 10 on the inside of any impact on the closure indicating tape 4 cooperate. The stops 9 on the container have inclined surfaces 11, which are inclined outwards, as can best be seen from FIG. In this way, the Attacks 9 via appropriately beveled stops

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run across the band 4 like a pawl when the closure cap 1 is screwed onto the container 7. The beveled edges of the container stops 9 and

of the tape stops 10 opposite sides of the An-5

Beats are generally radial to the container mouth and to the belt. This will come when the cap is unscrewed from the container 7, the stops 9 and 10 with each other j_n engagement, making them a further Prevent the belt 4 from rotating relative to the container 7. As a result, the tape 4 is torn off, so that it of the jacket 3 of the closure cap comes free because the connecting bridges 12, which the band 4 with the jacket 3 connect, break.

A circular slot or a corresponding predetermined breaking line is produced when the closure cap is formed, to separate the tape from the cap shell, several spaced apart

Bridges the band 4 with the jacket 3 in a tearable manner

the. In the embodiment shown in Figures 1 to 7, there are eight bridges 12, which are generally around the circumference of the cap shell 3 and the band 4 have the same distance and are on the outside of the jacket 3 and the band 4 are located outside the slot 13.

As best seen in Figures 6 and 7, the bridges 12 extend from the lower part of the _or . Mantle 3 down and over the tape, being around

the cap 1 between the lower edge of the jacket 3 and the upper edge of the band 4 is a full 360 ° extending slot 13 remains, of the part behind each of the bridges 12 pass through.

Figure 2 shows the closure cap 1 before it is applied to a filled container 7. The cap 1 is on the

Container 7 screwed down until between the container and the sealing ribs 14 on the underside of the cap cover 2 a seal is achieved. The band 4, which identifies any effects, moves down over the ring 8 and the stops 9 and 10 slide away on top of each other. The relationships and mutual positions of the threads 5 and 6 of the cap and the container, the band 4 and the stops 9 and 10 are chosen so that the stops 10 on the belt 4 and the stops 9 on the container 7 for are in a fully sealed position.

In the illustrated embodiment, the arrangement of four stops 9 and 10 results in a separation of the band 4 when the cap 1 is rotated 90 ° or less, thereby indicating an action on the closure before the cap 1 more than a small part of the twisting required for cap removal

has run.

For the purpose of a relatively easy and quick production of the closure caps, the caps are in formed in a single operation. The complete closure cap 1 including the cover 2 and the jacket 3 and any effects on the closure Identifying tape 4 is manufactured in the single casting process. Inserting the core 15 for the Shaping of the cap 1 also results in the manufacture of the

Threads 5 of the cap.

A new improved apparatus for forming the strip 4 simultaneously, including those from one another spaced stops 10 leaving the annular slot 13 is also the subject of the invention. A preferred embodiment of the mold for the

The cap according to FIG. 1 is shown in FIGS. 8 and 9 / wherein the core forming the cover and the jacket can be seen at 16 within the mold cavity 17. The core has a core sleeve portion 18 forming a slot and the tape forming vertical slots 19 in the mold cavity 17 serve to receive plastic material from the feed channel 23 over the cap shell portion 3 when the closure is being molded, thereby surrounding the various spaced bridges to form, which ^{protrude from 1} ^ lower parts of the jacket 3 and the outside of the band 4 to the outside (Figure 10). The sleeve part 18 has an inner band surface forming portion 20 with spaced cutouts 21 to form the spaced stops 10 on the inside of the band 4. A protruding outer edge 22 of the sleeve part 18 is arranged so that it extends in the direction of and moved against the parallel projecting surface of the mold cavity 17. The protruding edge seals on the protruding surface of the cavity 17 at all locations with the exception of those where the slots 19 for the bridges 20 are located. This stops the plastic and causes the circular slot 13 to be formed.

Earlier formers of this general type have slot-forming edges that are angled or generally rectangular faces of the mold cavity are moved in sliding contact. Movements like that in casting machines operating at high speed showed wear and tear after a relatively short time Dulls in the molding device result, so that no more fully open slots are formed could become.

The protruding edge 22 of the aforesaid sleeve 18 is moved downward within the cavity 17 and

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brought into contact with a correspondingly protruding room surface, but without sliding contact with the resulting friction. The contact therefore takes place at the moment when the protruding edge 22 ° on the surface of the cavity 17 has reached its lowest position without the beveled edge 22 moving over or along the wall of the cavity 17. Thereby, the edge wear is substantially eliminated, and it is thereby pre- ^ Q direction possible to produce the circular slots 13 over very long periods.

FIG. 11 shows another embodiment of a closure cap 30 according to the invention, which has a different arrangement of the cap shell with the any interventions indicating tape has connecting bridges. In this embodiment are the Bridges 31 within the circular slot 32, the forms the predetermined breaking line between the cap jacket 33 and the band 34.

The bridges 31 between the cap shell and the band 34 that identifies any interventions in the closure are formed from plastic, which is spaced apart by a number of circumferentially Slots 35 which are located in the edge of the core sleeve 36 passes therethrough. Here is an advantage of the above-mentioned protrusion of the cap shell 33 pulled at the slot 32, whereby the forming the slot Surface 37 on the cavity wall and on the core sleeve 36 may be conical and shaped as a section of a cone can be, as already mentioned above. Such surfaces are with the required dimensions and tolerances easy to manufacture on the mold space wall 37 and on the core sleeve 36. When forming a closure cap these parallels and conical surfaces are related

moves, whereby a good shape comes about, due to the result of the complementary Conical sections result in precise dimensions and because the movement takes place without greater frictional contact.

The molding device described above is thus not useful in the production of sinwand-free closure caps only the ability to work at high speed in the casting process, but it also stands out due to the simplicity of the molding device, which requires no renewals or repairs over long periods of operation requirement. These advantages reduce the cost of manufacturing the caps by allowing high operating speeds and the production of flawless caps and maintenance costs the molding device can be saved.

The closure cap created by the invention, which any intentional or accidental interventions and influences in the container closure identifies, is resistant to damage and it has compact shape an attractive appearance. The tape indicating actions on the closure joins itself only a small movement of the closure cap in operation, in which case there is also an indication in which only partial removal of the cap was attempted.

The method described and the device described for producing the closure cap, in particular for the formation of an engagement in the closure identifying tape with a groove or a slot, also enables cap manufacture to be operated at high speed with one Minimum of scrap. As a result, significant cost

savings achieved.

The exemplary embodiments can be in their shape, in their construction and in their arrangement of parts can be modified in various ways without departing from the scope of the invention.

Claims (10)

PRINZ, LEISER, BUNKE_ & · PARTNER Patent Attorneys ■ European Patent Attorneys Munich Stuttgart 3 4 4 1 A 3 Anchor Hocking Corporation November 13, 1984 109 North Broad Street Lancaster, Ohio 43130, USA Our reference: A 1934 patent claims 1./ One-piece molded, consisting of a lid and a aaran hanging coat existing plastic cap for containers with an internal thread that can be screwed onto a thread on the container neck and with one on the other edge of the jacket, indicating any interventions in the lock Band, which at least with its upper portion protrudes outwards, characterized by a) a plurality of bridge parts between the protruding band and the lower shell part, b) one running between the lower shell part and the band around the closure cap Slot and ■ * ■ c) a plurality of on the inside of the belt inwardly protruding stops that can cooperate with stops on the container. 2. Closure cap according to claim 1, characterized in that the threads engaging in the container thread at least partially run through. 3. Closure cap according to claim 1, characterized in that the stops of the tape on their when screwing the front edges have inclined surfaces that facilitate the overflow of the container stops and have approximately radially extending rear edges, which when unscrewing the closure against the container stops meet. 4. Sealed container, consisting in combination of a container with located at its mouth, threaded with the closure to be brought into engagement, from a closure cap in the form of a Plastic molding with a lid and a jacket hanging on it, which is threaded through its inside is to be brought into screw connection with the thread of the container, and from one at the lower edge of the jacket attached, any interventions in the closure identifying tape that extends downwards and outwards and connected to the lower part of the shell by a plurality of bridges, one between the cap shell and the top edge of the tape around the closure cap bridging the extending slot, and from a A plurality of stops projecting inwardly from the inside of the belt and engaging with stops on the container can come into engagement below the container thread when unscrewing the closure cap. 5. Container according to claim 4, characterized in that 344U31 that the threads on the container and on the closure cap are at least partially continuous threads to have. 6. Container according to claim 4, characterized in that that the stops of the band on their front edges when screwing tight have inclined surfaces which facilitate the overflow of the container stops and have approximately radially extending rear edges.
10 7. A container according to claim 4, characterized in that the stops on the container mouth at their at Tightening of the fastener front edges have sloping surfaces to facilitate overflow of the tape stops and have approximately radially extending rear edges which, when the closure is unscrewed, abut with the closure meet each other. 8. Forming device for one of a lid and a from this hanging coat with any Interventions identifying tape existing closure cap with a mold cavity and a mold piston, thereby characterized in that the mold cavity for producing protruding parts of the closure cap has a protruding Side wall and a slot portion on the piston has a protruding edge which is in a position opposite the protruding Is to bring mold cavity side wall in order to cooperate with it while forming the predetermined breaking line. 9. Molding device according to claim 8, characterized in that the part of the piston forming the slot has a parallel has protruding surface extending to the cavity sidewall for forming an open slot in the closure. 10. Molding device according to claim 8, characterized by a sleeve arranged on the molding piston, on which the part forming the slot is located.