Plastic cover for container

Abstract

A plastic cover for a container includes a main body, and an anti-theft ring mounted on an end of the main body and having an inner wall provided with a plurality of catch plates each having a mediate section formed with a bent portion. Thus, the bent portion enhances the structural strength of each of the catch plates, so that each of the catch plates can be made with a smaller thickness, thereby decreasing costs of fabrication.

Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a cover, and more particularly to a plastic cover for a container.

[0003] 2. Description of the Related Art

[0004] A conventional plastic cover comprises a main body mounted on the mouth of a container, an anti-theft ring mounted on an end of the main body and having an inner wall provided with a plurality of planar catch plates rested on the catch edge of the container, a plurality of discontinuously arranged cutting seams formed between the main body and the anti-theft ring, and a plurality of connecting bridges connected between the cutting seams.

[0005] However, each of the catch plates has a greater thickness to provide an efficient structural strength, so as to prevent the catch plate from detaching the catch edge of the container, thereby increasing costs of fabrication.

SUMMARY OF THE INVENTION

[0006] The primary objective of the present invention is to provide a plastic cover, wherein each of the catch plates of the anti-theft ring is provided with a bent portion which distributes the transverse compressing force applied on the catch plate when the catch plate is compressed by the transverse force, so as to enhance the transverse structural strength of each of the catch plates, so that each of the catch plates can withstand a larger transverse stress and cannot be bent easily.

[0007] Another objective of the present invention is to provide a plastic cover, wherein the two wings of each of the catch plates are inclined toward different directions so as to enhance the longitudinal structural strength of each of the catch plates, so that each of the catch plates can withstand a larger longitudinal stress.

[0008] A further objective of the present invention is to provide a plastic cover, wherein the bent portion enhances the structural strength of each of the catch plates, so that each of the catch plates can be made with a smaller thickness, thereby decreasing costs of fabrication.

[0009] A further objective of the present invention is to provide a plastic cover, wherein the connecting studs are mounted on the inner wall of the main body and the anti-theft ring, so that the continuously arranged cutting seam is directly formed between the main body and the anti-theft ring after the main body is integrally formed with the anti-theft ring, thereby simplifying the procedure of fabrication.

[0010] A further objective of the present invention is to provide a plastic cover, wherein the anti-theft ring is provided with a plurality of flexible connecting ribs for connecting the catch plates so as to enhance the structural strength of the anti-theft ring.

[0011] A further objective of the present invention is to provide a plastic cover, wherein the flexible connecting ribs are deformed when the catch plates are compressed by the transverse force so as to absorb the compressing force applied on the catch plates.

[0012] A further objective of the present invention is to provide a plastic cover, wherein the two wings of each of the catch plates are rested on the catch edge the container along two different inclined angles, so that each of the catch plates of the anti-theft ring is combined with the catch edge the container rigidly and closely, thereby enhancing the combination strength of the anti-theft ring with the container.

[0013] In accordance with the present invention, there is provided a plastic cover, comprising:

[0014] a main body; and

[0015] an anti-theft ring mounted on an end of the main body and having an inner wall provided with a plurality of catch plates each having a mediate section formed with a bent portion.

[0016] Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG. 1 is a partially cut-away plan cross-sectional assembly view of a plastic cover and a container in accordance with the preferred embodiment of the present invention;

[0018] FIG. 2 is a partially cut-away perspective cross-sectional view of the plastic cover in accordance with the preferred embodiment of the present invention;

[0019] FIG. 3 is a side plan cross-sectional view of the plastic cover as shown in FIG. 2;

[0020] FIG. 4 is a plan cross-sectional view of the plastic cover taken along line 4-4 as shown in FIG. 3;

[0021] FIG. 5 is a partially cut-away perspective cross-sectional view of the plastic cover in accordance with another embodiment of the present invention;

[0022] FIG. 6 is a side plan cross-sectional view of the plastic cover as shown in FIG. 5;

[0023] FIG. 7 is a plan cross-sectional view of the plastic cover as shown in FIG. 6; and

[0024] FIG. 8 is a top plan cross-sectional view of the plastic cover and the container as shown in FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION

[0025] Referring to the drawings and initially to FIGS. 1-4, a plastic cover 13 in accordance with the preferred embodiment of the present invention is mounted on a container 11. The container 11 has a top formed with a mouth 12 having an outer wall formed with an outer thread 18 and an annular catch edge 25.

[0026] The plastic cover 13 comprises a main body 14, and an anti-theft ring 15.

[0027] The main body 14 of the plastic cover 13 is mounted on the mouth 12 of the container 11 and has an inner wall formed with an inner thread 17 screwed on the outer thread 18 of the container 11. The main body 14 of the plastic cover 13 has a first end formed with a closed face 16 and a second end formed with an opening 160.

[0028] The anti-theft ring 15 of the plastic cover 13 is mounted on the second end of the main body 14 of the plastic cover 13, and has an inner wall provided with a plurality of catch plates 21 each bent toward the closed face 16 of the main body 14 of the plastic cover 13. Preferably, the catch plates 21 of the anti-theft ring 15 are equally spaced from each other.

[0029] Each of the catch plates 21 of the anti-theft ring 15 is substantially V-shaped. Each of the catch plates 21 of the anti-theft ring 15 has two ends formed with two wings 28 and a mediate section formed with a bent portion 22. The two wings 28 of each of the catch plates 21 are inclined toward different directions. Preferably, the bent portion 22 of each of the catch plates 21 of the anti-theft ring 15 is directed toward a center of the anti-theft ring 15 as shown in FIG. 4.

[0030] The anti-theft ring 15 includes a plurality of flexible connecting ribs 26 for connecting the catch plates 21 so as to enhance the structural strength of the anti-theft ring 15. In addition, the connecting ribs 26 are deformed when the catch plates 21 are compressed by a transverse force, so as to absorb the transverse compressing force applied on the catch plates 21.

[0031] The plastic cover 13 further comprises a continuously arranged cutting seam 23 formed between the main body 14 and the anti-theft ring 15, so that the main body 14 is not separated from the anti-theft ring 15 completely.

[0032] The plastic cover 13 further comprises a plurality of connecting studs 24 mounted on the inner wall of the main body 14 and the anti-theft ring 15. Each of the connecting studs 24 has a first end connected to the main body 14 and a second end connected to the anti-theft ring 15. Thus, each of the connecting studs 24 is passed through the cutting seam 23 to connect the main body 14 and the anti-theft ring 15.

[0033] Accordingly, each of the catch plates 21 of the anti-theft ring 15 is provided with a bent portion 22 which distributes the transverse compressing force applied on the catch plate 21 when the catch plate 21 is compressed by the transverse force, so as to enhance the transverse structural strength of each of the catch plates 21, so that each of the catch plates 21 of the anti-theft ring 15 can withstand a larger transverse stress and cannot be bent easily.

[0034] In addition, the two wings 28 of each of the catch plates 21 are inclined toward different directions so as to enhance the longitudinal structural strength of each of the catch plates 21, so that each of the catch plates 21 of the anti-theft ring 15 can withstand a larger longitudinal stress.

[0035] Further, each of the catch plates 21 of the anti-theft ring 15 is provided with a bent portion 22 which enhances the structural strength of each of the catch plates 21, so that each of the catch plates 21 of the anti-theft ring 15 can be made with a smaller thickness, thereby decreasing costs of fabrication.

[0036] Further, the connecting studs 24 are mounted on the inner wall of the main body 14 and the anti-theft ring 15, so that the continuously arranged cutting seam 23 is directly formed between the main body 14 and the anti-theft ring 15 after the main body 14 is integrally formed with the anti-theft ring 15, thereby simplifying the procedure of fabrication.

[0037] Further, the anti-theft ring 15 is provided with a plurality of flexible connecting ribs 26 for connecting the catch plates 21 to enhance the structural strength of the anti-theft ring 15.

[0038] Further, the flexible connecting ribs 26 are deformed when the catch plates 21 are compressed by the transverse force, so as to absorb the transverse compressing force applied on the catch plates 21.

[0039] Referring to FIGS. 5-7, a plastic cover in accordance with another embodiment of the present invention is shown, wherein the bent portion 22 of each of the catch plates 21 of the anti-theft ring 15 is directed toward the inner wall of the anti-theft ring 15 as shown in FIG. 7.

[0040] Referring to FIG. 8 with reference to FIGS. 1-4, when the anti-theft ring 15 is combined with the container 11, the two wings 28 of each of the catch plates 21 are rested on the catch edge 25 the container 11 with two different inclined angles, so that each of the catch plates 21 of the anti-theft ring 15 is combined with the catch edge 25 the container 11 rigidly and closely, thereby enhancing the combination strength of the anti-theft ring 15 with the container 11.

[0041] Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.

Claims

What is claimed is:

1. A plastic cover, comprising: a main body; and an anti-theft ring mounted on an end of the main body and having an inner wall provided with a plurality of catch plates each having a mediate section formed with a bent portion.

2. The plastic cover in accordance with claim 1, wherein the main body has an inner wall formed with an inner thread.

3. The plastic cover in accordance with claim 1, wherein the main body of the plastic cover has a first end formed with a closed face and a second end formed with an opening.

4. The plastic cover in accordance with claim 3, wherein the anti-theft ring is mounted on the second end of the main body.

5. The plastic cover in accordance with claim 3, wherein each of the catch plates is bent toward the closed face of the main body.

6. The plastic cover in accordance with claim 1, wherein the catch plates of the anti-theft ring are equally spaced from each other.

7. The plastic cover in accordance with claim 1, wherein each of the catch plates of the anti-theft ring is substantially V-shaped.

8. The plastic cover in accordance with claim 1, wherein each of the catch plates of the anti-theft ring has two ends formed with two wings which are inclined toward different directions.

9. The plastic cover in accordance with claim 1, wherein the bent portion of each of the catch plates of the anti-theft ring is directed toward a center of the anti-theft ring.

10. The plastic cover in accordance with claim 1, wherein the bent portion of each of the catch plates of the anti-theft ring is directed toward the inner wall of the anti-theft ring.

11. The plastic cover in accordance with claim 1, wherein the anti-theft ring includes a plurality of flexible connecting ribs for connecting the catch plates so as to enhance the structural strength of the anti-theft ring.

12. The plastic cover in accordance with claim 11, wherein the connecting ribs are deformed when the catch plates are compressed by a transverse force, so as to absorb the transverse compressing force applied on the catch plates.

13. The plastic cover in accordance with claim 1, further comprising a continuously arranged cutting seam formed between the main body and the anti-theft ring, so that the main body is not separated from the anti-theft ring completely.

14. The plastic cover in accordance with claim 13, further comprising a plurality of connecting studs mounted on the inner wall of the main body and the anti-theft ring.

15. The plastic cover in accordance with claim 14, wherein each of the connecting studs has a first end connected to the main body and a second end connected to the anti-theft ring, so that each of the connecting studs is passed through the cutting seam to connect the main body and the anti-theft ring.