Sealing device

Abstract: A new sealing device (30) which has not a capability of the push-through head portion (19) being re-inserted into the socket portion (2) again after the sealing condition has once been broken and further, a new sealing device (30) can be provided in which the evidence showing the fact that the sealed condition of the sealing device had been broken, intentionally, remains visible on the sealing device. The sealing device (30) is provided with a filament portion (3), a push-through head portion (19) provided at least at one end of the filament portion (3) and having a suitable connecting portion (23) which comprises, for example, a hooked portion, and a socket portion (2) provided at another end of the filament portion (3) and having a hole (10) through which the push-through head portion (19) can pass in one direction but not be withdrawn in the opposite direction, and wherein a stretch strength of the push-through head portion (19) is set at a certain level in that it is smaller than that of the filament portion (3).

Description: This invention relates to a sealing device which can be attached to goods including clothes, shoes, bags and so on, so as to make necessary seal for those goods accompanied with a tag including branded label, price tag, explanation about materials used therefor, explanation how to use goods, or the like. This invention specifically relates to a sealing device which cannot be used again for sealing something after it has been used to seal certain goods with a tag through a loop-like filament formed when it is used for seal. In the past, a sealing device as shown in Fig. 6, has been used for sealing goods including any kinds of clothes, boots especially for women, sandals, any kinds of shoes, or the like so as to connect to each other or to attach a branded label or a price tag thereto. As shown in Fig. 6(A), an existing sealing device 30 comprises a filament portion 3 which can make a loop-like configuration through a tag R when it is used for sealing something, a push-through head portion 19 provided at one of the end portions of the filament portion 3 and having a hooked portion, and a socket portion 2 provided at another end of the filament portion 3 and having a hole 10 through which the push-through head portion 19 can pass. In this sealing device, the above-mentioned portions are preferably made of synthetic resin polymer material and preferably being integratedly molded into one piece and further, especially for the filament portion 3, it may be formed by drawing method for drawing synthetic polymer resin material so as to make this portion strong against stretching force. Fig. 6(A) shows a condition in that the push-through head portion 19 is fixed inside the socket portion 2, and it is apparent from Fig. 6(B), when the push-through head portion 19 is completely passed through a narrowed portion of the socket portion 2, that corresponding to a projectedly formed portion 16, a hooked portion, for example, a bladed portion 23, is moved outwardly so that the push-through head portion 19 can be fixed inside the socket portion 2 not to be able to be withdrawn in an opposite direction to which the push-through head portion 19 is inserted into the socket portion 2, and thus a necessary seal can be completed by forming a loop-like label attaching portion. This kind of sealing device has been mainly used not only for combining a couple of boots, sandals, or shoes or the like, but also for fixedly attaching branded labels, tags explaining how to use the certain goods attached thereto. However, recently, very significant problems have arisen in that this kind of sealing device are frequently detached from certain goods by a third person, illegally, and unlawful exchanging operations have been conducted under which correct price tags are intentionally exchanged with price tags of a lower price or of a higher quality branded good and are therefore exchanged with imitation goods, or genuine famous branded labels are stolen by exchanging them with separate imitation labels. Therefore, a situation has arisen such that consumers can no longer rely on the genuineness of these goods. For example, in a department store or supermarket, a selling section in which many goods to be sold are displayed is usually located in an area independently separated from a place in which a cashing portion is provided. Note that as explained above, since the tip end portion of the push-through head portion 19 of the sealing device or the blade portion as provided in a vicinity of the push-through head portion 19, of the projecting portion are usually formed relatively weak, when a little bit higher stretching force is applied to this sealing device, the blade portion or the projecting portion will be deformed so that the push-through head portion 19 can be withdrawn from the socket portion 2 reducing the looped filament 3 into non-looped condition. Accordingly, the labels or the price tags which are held by the looped filament portion 3 can be stolen or exchanged with separate labels or price tags different therefrom, and after that the push-through head portion 19 can be re-inserted into the socket portion 2 to re-establish the original condition; hence appearing as the correct label to an observer. In this case, since the push-though head portion 19 is usually deformed significantly, there exist many cases where the push-through head portion 19 cannot be re-inserted into the socket portion 2 easily but there must exist many cases where it can be realized. Further, in the situation when the push-through head portion 19 can be re-inserted into the socket portion 2, although no guarantee for the push-through head portion 19 to be fixedly held inside the socket portion 2 is available, the third party cannot accurately discriminate such incorrect condition over this sealing device from the correct condition since the incorrect sealing device is externally appears as if it is a correct sealing device. GB-A-2,163,392 discloses a security seal which comprises an elongate strip of flexible material, having a plug at one end and a socket at the other. The socket is provided with two axially spaced rows of flexible tongues and which are engaged, in use, by respective barbs on the plug. This provides double locking of the seal, so enhancing security. The seal may be broken by detaching the strap from the plug by breaking limbs which provide a weakened connection. GB-A-2,164,003 discloses a sealing device which comprises an elongate flexible strip which has a key at one end and a socket at its other end, the socket having at least one internal resilient catch which is capable of receiving the key in a locking relationship. A weakened area may be provided in the strip. Therefore, significant problems have arisen whereby many genuine consumers are forced to buy goods having bad quality or are imitations of high cost branded goods. The above-mentioned problems have arisen since conventional sealing devices have an easily detachable push-through head portion 19 from the socket portion 2. Note that, as shown in Fig. 6(B), even if a good is sealed with the sealing device, when a relatively large amount of stretching force is applied to the sealing device, the hooked portion or a bladed portion 23 of the push-through head portion 19 is deformed so that the push-through head portion 19 can be released from the socket portion 2 and then the push-through head portion 19 can be re-inserted into the socket portion 2 again. It would be desirable that any new sealing device with a push-through head portion should not be resealable by re-inserting the head portion into the socket portion. Also, any new sealing device should be such that if the sealed condition of the sealing device had been broken, this condition would be self-evident. The present invention seeks to provide an improved sealing device. According to an aspect of the present invention, there is provided a sealing device as specified in claim 1. The sealing device is preferably so constructed that after the push-through head portion has been inserted into the socket portion so as to establish a sealed condition, and the sealing device has been cut off at a predetermined portion with a predetermined stretching force, it is impossible for the push-through head portion to be re-inserted into the socket portion so as to re-establish the sealing condition. An embodiment of the present invention is described below, by way of example only, with reference to the accompanying drawings, in which: Fig. 1 shows an example of sealing device; Fig. 2 shows another example of sealing device; Fig. 3 shows an example of sealing device with a slit position; Fig. 4 shows another example of sealing device with a slit position; Fig. 5 shows another example of sealing device with a slit position; Fig. 6 shows an example of a conventional sealing device; Fig. 7 shows a construction of a conventional sealing device; Fig. 8 shows a first embodiment of sealing device of the present invention; Fig. 9 shows a second embodiment of the sealing device of the present invention. Fig. 1 shows a first example of sealing device which comprises a filament portion 3, a push-through head portion 19 provided at least at one end of the filament portion 3 and having a suitable connecting portion 23 which comprises for example, a hooked portion, and a socket portion 2 provided at another end of the filament portion 3 and having a hole 10 through which the push-through head portion 19 can pass in one direction but not be withdrawn in the opposite direction, and wherein the stretch strength of the push-through head portion 19 is set at a certain level in that it is smaller than that of the filament portion 3. In the sealing device 30, it is preferable that a portion of the push-through head portion 19 is constructed so that it can be cut off with a certain amount of stretch force after it had been inserted into the predetermined hole 10 provided in the socket portion 2. Normally, in the sealing device 30, breaking strength force to break the seal of the sealing device 30 is preferably set at relatively higher level but if the level of the breaking strength force of the filament portion 3 and the sealing device 19 are set at too high level, the filament portion 3 would be abnormally stretched leading the blade portions of the push-through head portion 19 or the projecting portion provided inside the socked portion to be deformed or destroyed so as to release the sealing condition of the sealing device 30, and further, the push-through head portion 19 could be re-inserted into the hole 10 of the socket portion 2. A too high level of breaking stretch strength is not preferable it is therefore desirable that the connecting portion 23 of the push-through head portion 19 is designed to have a maximum break stretching strength within a range in which the connecting portion 23 of the push-through head portion 19 cannot be cut off. The sealing device 30 can also be used for fastening a pair of boots, sandals or shoes, and in that case, some significant load would be applied to the sealing device 30 when they are moved from one place to another place, for example. Hence, situations where the sealing device 30 could be broken with relatively lower break stretching force, must be avoided. Therefore, the sealing device 30 can be constructed so that at least a portion thereof can be cut off when it is suffered from break stretching force of 6 to 8 kg, and can be set at the level of 7 to 7.5 kg. Additionally, at least a portion of the push-through head portion 19 can be so constructed that it can remain inside the socket portion 2 after the push-through head portion 19 has been cut off. Since at least a portion of the push-through head portion 19 remains in the hole 10 of the socket portion 2, it can be easily recognised that the push-through head portion 19 has been illegally broken and simultaneously with this, the rest of the portion of the push-through head portion 19 cannot be re-inserted into the socket portion any more. The sealing device 30 could be made of synthetic polymer resin and moulded therefrom and then drawn to form a final product. Alternatively, the push-through head portion 19 could be made of undrawn synthetic polymer resin so that the push-through head portion 19 made of undrawn synthetic polymer resin has break stretching strength being relatively lower than that of the filament portion 3. The filament portion 3 of the sealing device 30 could be made of drawn synthetic polymer resin so that the filament portion 3 has break stretching strength bring relatively higher than that of the push-through head portion 19. The sealing device 30 will be more precisely explained with reference to Fig. 1. A basic construction of the sealing device 30 has a similar construction of a conventional sealing device as shown in Fig. 6. Although, in this case, the socket portion 2 is provided with a hole 10 through which the push-through head portion 19 can pass in one direction but not be withdrawn in the opposite direction, and further a contacting portion 16 which can be connected with a bladed portion or a projecting portion 23, a part of the push-through head portion 19, is provided inside the hole 10 of the socket portion 2. The contacting portion 16 comprises a projecting portion or concaved portion formed inside the hole 10. The push-through head portion 19 of the sealing device 30 can be provided with at least a projecting portion 23 fitted to the contacting portion 16 or at least one blade portion 23 having a bias force directed to an external direction of the push-through head portion 19 so as to contact the contacting portion 16. Accordingly, the strength of the bladed portion 23 including the projecting portion or the wing-like portion of the push-through head portion 19 is increased as compared with that of the push-through head portion 19 of the conventional sealing device as shown in Fig. 7. Thus such a bladed portion 23 cannot be deformed with the breaking stretching force of around 6 to 9kg so that the push-through head portion 19 is intended so as not to be easily withdrawn from the socket portion 2 and therefore a part of the push-through head portion 19 can be cut off. With reference to Fig. 1 (A), the above-mentioned effect can be realized, for example, by enlarging the thickness of the bladed portion 23 which is connected to the head portion 31, that is a tip end portion of the push-through head portion 19, or by enlarging a diameter or the thickness of a connecting root portion formed between the bladed portion 23 and the head portion 31. When reinforcing the root portion of the contacting portion, the push-through head portion is also constructed so that the push-through head portion cannot easily be withdrawn from the socket portion. Other examples will be explained with reference to Figs. 2 to 4. In another example, at least a portion of the push-through head portion 19 is provided with a weak portion 300 which can be easily cut off with a predetermined break stretching force, and as shown in Fig. 2(A), in a specific embodiment thereof, the weak portion comprises a portion 32 provided at least on one portion of the push-through head portion 19 and having a diameter being smaller than that of the push-through head portion. As shown in Fig. 2(A), a portion 32 having a small diameter, is provided between the head portion 31 that is a tip end portion of the push-through head portion 19 and is a separate, connected undrawn portion. Although the construction of this example is similar to that of the push-through head portion 19 of the conventional sealing device, as shown in Fig. 7, the diameter of the connecting portion connecting the head portion 31 to the undrawn portion is intentionally formed to have a small diameter and further, more preferably as shown in Fig. 2(B), a cross-sectional configuration of the portion having a smaller diameter 32 is varied so as to form a more weaker portion. In yet another example of the sealing device 30, as shown in Fig. 3, the weak portion 300 comprises a slit portion 33 formed at least on one portion of the push-through head portion 19 and formed in a direction perpendicular to an axis of the push-through head portion 19. In this example, the slit portion 33 can be formed along an overall circumference of the push-through head portion 19 or it can be formed at least at a part of the circumference thereof. The depth of the slit portion 33 or the space existing between adjacent slits or the number of the slits is not restricted but can be optionally designed within a range so as to meet with the above-mentioned conditions. Although it is shown that such a slit portion 33 is provided on a portion of the push-through head portion 19, which is inserted into the socket portion 2, it is not restricted to this example. The slit portion, for example, can be on a portion of the push-through head portion 19 as shown in Fig. 4. In another example, as shown in Fig. 5, a similar kind of the slit portion 35 to the slit portion 34, can be provided on a portion of the push-through head portion 19n which is away from the socket portion 2. Further, when the slit portion or a section having a narrow diameter is provided on the push-through head portion 19 of the sealing device, the slit portion naturally becomes a weak portion and thus may be broken unnecessarily. To avoid such a problem, the break-strength of the slit portion should be a little bit higher than that used normally, with respect to the object to the sealing device. With reference to Fig. 8(A) and Fig. 8(B), a first described embodiment of the invention is shown, in which at least one suitable lip portion 36 can be provided on the slit portion 34 or the portion having the narrow diameter, as a reinforcement member. As shown in Fig.8(C), for example, a cross-sectional configuration of the lip portion 36 is preferably a cross configuration when viewed from the direction of the push-through head portion 19. The configuration, height and numbers of lip portions can be optionally determined as a design matter. As explained above, the basic construction of the sealing device 30 is such that a sealing device which comprises a filament portion, a push-through head portion provided at least at one end of the filament portion and having a hooked portion, and a socket portion provided at another end of the filament portion and having a hole through which the push-through head portion can pass in one direction but not be withdrawn in the opposite direction, and wherein the sealing device is constructed so that once the push-through head portion has been inserted into the socket portion to seal, a predetermined portion of the push-through head portion is cut off with stretch force so as to prevent the sealing device from being re-sealed, and the sealing device being further characterized in that the socket portion 2 is provided with a hole 10 through which the push-through headportion 19 can pass in one direction but not be withdrawn in the opposite direction and further inside of the hole 10, a contacting portion 16 to which the a portion of the sealing device can be contacted thereto is provided. The contacting portion 16 which is provided in the hole 10 of the socket portion 2, comprises a projecting portion or concaved portion formed inside the hole 10. Further, the push-through head portion 19 is further provided with at least one projecting portion 23 which can be contacted to the connecting portion 16, as provided in the hole 10 Moreover, the push-through head portion 19 is further provided with at least one blade portion 23 having a bias force directed to an external direction of the push-through head portion 19 so as to contact the connecting portion 16. The size of the socket portion 2 as used in the socket portion 30, is preferably set at a size so as to easily be picked up while having as small as an external size as the sealing device 30 push-through head portion 19. In another preferred embodiment, the push-through head portion 19 may be provided with at least one ring-like projected portion 40, as shown in Fig. 9, having a diameter larger than that of the neighbouring portion P1 of the push-through head portion 19 and the ring-like projected portion 40 is preferably formed perpendicular to the axis of the push-through head portion 19. The ring-like projected portion 40 can be integrally formed with the push-through head portion 19. The number, size or configuration of projected portion 40 is optional and can depend upon the situation in which it will be used. A first ring-like projected portion 40 is formed at a portion P1 of the push-through head portion 19 that is closer to the blade portion 23 but separated by the ring-like projected portion 40. A second and third ring-like projected portions 41 and 42 can be provided on a portion P2, which is closer to the weak portion 32. The ring-like projected portions 40 to 42 serve as a stopper portion or serve as a portion which makes it easy to be grasped by user thereof. when he will try to insert the push-through head portion 19 into the hole 10 of the socket portion 2. Since the push-through head portion 19 has the technical construction as mentioned above, a new sealing device which does not have the capability of the push-through head portion being re-inserted into the socket portion 2 again is provided. Further, a new sealing device which maintains the visual appearance of the sealed condition having been broken once the sealing device has been broken is also provided.

Claims: A sealing device (30) which comprises a filament portion (3), a push-through head portion (19) provided at least at one end of said filament portion and a socket portion (2) provided at the other end of said filament portion (3) and including a hole (10) through which said push-through head portion (19) can pass in one direction but not be withdrawn in the opposite direction, a portion of said push-through head portion being provided with a weak portion which can be cut off with a predetermined stretch force, said weak portion comprising a slit portion (33;34;35) formed at least on one portion of said push-through head portion and formed in a direction perpendicular to an axis of said push-through head portion, a diameter of said slit portion being smaller than that of said push-through head portion, and at least one lip portion (36) provided inside said slit portion as a reinforcement member. A sealing device according to claim 1, wherein a cross-sectional configuration of said lip (36) portion along said axis of said push-through head portion, is cross-shaped. A sealing device according to claim 1 or 2, wherein said push-through head portion is made of undrawn synthetic polymer resin. A sealing device according to claim 1, 2 or 3, wherein said filament portion is made of drawn synthetic polymer resin. A sealing device according to any preceding claim, wherein said push-through head portion is constructed that it can be cut off when it is stretched with stretching force of 6 to 8kg. A sealing device according to any preceding claim, wherein said socket portion has a size easily to be picked up while having a small external size.

Inventors: UENO HIDEYUKI, UENO, HIDEYUKI
Applicants: KOTEC S CO LTD, SANYO SEISAKUSHO CO LTD, KOTEC'S CO. LTD., SANYO SEISAKUSHO CO., LTD.
Application year: 1998
Main classification: G09F3
IPC codes: G09F3, B65D63