WO1993021080A1

WO1993021080A1 - Bottle cap made of synthetic resin

Info

Publication number: WO1993021080A1
Application number: PCT/KR1993/000027
Authority: WO
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-04-20
Filing date: 1993-04-20
Publication date: 1993-10-28
Anticipated expiration: 1994-10-20
Also published as: EP0636093A1; EP0636093B1; AU4272493A

Abstract

The present invention relates to a highly hermetically sealing synthetic resin made bottle cap (1) which can open a bottle cap by one touch manner without any separate opener, and which is high in a sealing effect and possible to use as a single model regardless of a carbonated beverage or non-carbonated beverage, and which is caracterized by a structure that a pulling tab (9) is provided at a side surface (3) of the bottle cap, a cut out portion (2) connected with the pulling tab is formed at the top surface portion and the side surface portion, and a stopper (5) of cylindrical form is integrally formed at inner side and a reinforcing ring (4) is inserted.

Description

BOTTLE CAP MADE OF SYNTHETIC RESIN

TECHNICAL FIELD The present invention relates to a stopper integral type bottle cap made of soft and hard synthetic resin, and more particularly to a highly hermetically sealing synthetic resin made bottle cap capable of using without receiving any limitation for carbonated or non-carbonated beverage and which can be easily open the bottle cap without any opener and excellent in sealing effect.

BACKGROUND ART Presently used caps of various beverage bottles or bottles for filling alcoholic liquors are all made by steel or aluminum.

In case of caps made of steel, the cap can be taken off from a bottle only having to necessarily use an opener, and in the distributing course, since the cap is easily oxidized and corroded, not only it is bad in hygienic but also unpleasantness is given to a consumer in visual as well and hence value of commodity is fallen. And, in case of caps made of aluminum, it has advantage that the cap can be take off from the bottle without separate opener, but after the cap is taken off from the bottle, a portion that a cap is taken off from the bottle is very sharp and it has a worry about to hurt a finger, and the aluminum itself is expensive but its strength is weak whereby the sealing effect is reduced, therefore it has limitation in use that it is almost not in use for the carbonated beverage bottle and mainly can be used only for a cap of non-carbonated beverage or alcohol bottle and the like.

And, the cap made of steel or aluminum as above is more than one hundred years in all in their oxidizing speed and is semi-permanent, therefore in case being thrown away around near place, they have been also a principal offender polluting a peripheral environment or soil.

DISCLOSURE OF INVENTION

The present invention aims to solve all of problems in the steel made bottle cap or aluminum made bottle cap as described above, and it is a first object of the present invention to provide a bottle cap capable of easily taking off by one time action without separate opener, and second object is to provide a bottle cap excellent in sealing effect so as to be able to use commonly without any difference of carbonated beverage or non-carbonated beverage.

And, it is third object to provide a bottle cap which can be easily taken off by one touch system and simultaneously does not make any sharp portion after taking it off, and it is fourth object to provide a bottle cap having a function capable of preventing imitation of contents material and storing a separate contents.

BRIEF DESCRIPTION OF DRAWINGS

FIG.l is a perspective view of a bottle cap in accordance with the present invention,

FIG.2 is a cross sectional view taken along A-A line of FIG.l,

FIG.3 is a cross sectional view taken along B-B line of FIG.l, FIG. is a cross sectional view of a state that a bottle cap of the present invention is coupled to the bottle,

FIG.5 and FIG.6 show a state that a bottle cap of the present invention is being taken off from the bottle,

FIG.7(A)(B) are respectively a perspective view and a cross sectional view of the bottle cap that a pulling tab is integrally formed at a side surface,

FIG.8(A)(B) are respectively a perspective view and a cross sectional view of the bottle cap that a pulling tab is integrally formed around the lower side thereof ,

FIG.9 is a perspective view of a bottle cap that a pulling tab is formed in long below the side surface,

FIG.10(A)(B)(C) are cross sectional views showing a using state of the bottle cap shown in FIG.9,

FIG.11 is a perspective view of the bottle cap made the pulling tab to be able to insert to top surface of the bottle cap,

FIG.12 is a cross sectional view of a bottle cap of a type that a reinforcing ring blocked in its top side is inserted from exterior,

FIG.13 is a cross sectional view of a state that the reinforcing ring is separated,

FIG.14 is a cross sectional view of the bottle cap of a type that a reinforcing ring opened in its top side is inserted from exterior,

FIG.15 is a cross sectional view of a state that the reinforcing ring is separated,

FIG.16 is a cross sectional view of a bottle of a type that an air. tight packing is inserted to a cap portion,

FIG.17 is a cross sectional view of using state of the bottle cap shown in FIG.18,

FIG.18 is a cross sectional view of a state that a cap portion is improved in cross section in order to increase the sealing effect, FIG.19 is a cross sectional view which is improved the structure of the cap potion and the reinforcing ring in order to increase the sealing effect,

FIG.20(A)(B) are respectively a cross sectional view and a view of operating state of the bottle cap suitable in use for a carbonated beverage bottle maintaining a pressure resistance as a bottle cap for increasing the sealing effect,

FIG.21(A)(B) are cross sectional views of the bottle cap suitable in use for a vacuum packaging container as a bottle cap for increasing the sealing effect,

FIG.22 is a modified embodiment of the bottle cap of the present invention and is a cross sectional view structured so as to store a separate contents material within interior of the bottle cap,

FIG.23 is a perspective view of a bottle cap in which an imitation preventing band is integrally formed, ° FIG.24 is a diagram showing an effect of the imitation preventing band,

FIG.25(A)(B) show the bottle cap for preventing an imitation of the contents material, and are respectively a cross sectional view and a view of operating state of a bottle cap manufactured so as to use for carbonated beverage bottle maintaining a pressure resistance,

FIG.26(A)(B) show the bottle cap for preventing an imitation of the contents material, and are cross sectional views of. the bottle cap manufactured so as to use for a vacuum packaging container,

FIG.27, FIG.28 and FIG.29 are diagrams showing a second embodiment of the present invention, and FIG.27 is a perspective view, FIG.28 is a perspective view of a state that a pulling tab is turned over to backward, and FIG.29 is a cross sectional view of a using state, FIG.30(A)(B) are a modified example of the second embodiment, and show a state that the pulling tab is integrally formed to a side wall,

FIG.31(A)(B) are a modified example of the second embodiment, and show a state that the pulling tab is formed at lower side of side wall,

FIG.32(A)(B) are diagrams of a state that the pulling tab described in the first embodiment is integrally formed at lower* side of the side wall, FIG.33(A)(B) are diagrams of a state that the pulling tab described in the first embodiment is integrally formed at upper side of the side wall,

FIG.34(A)(B) are diagrams of a state that the pulling tab is formed at upper side of the side wall and coupled,

FIG.35(A)(B) are views showing a third embodiment of the present invention, and show that an air discharging path is formed,

FIG.36(A)(B) are views showing a fourth embodiment of the present invention, and respectively a cross sectional view and a perspective view of a state that a separate cap is covered to top side of the bottle cap,

FIG.37 is a view showing a fifth embodiment of the present invention,

FIG.38 is a cross sectional view taken along A-A line of FIG.37,

FIG.39 is a cross sectional view taken along B-B line of FIG.37,

FIG.40 is a view of using state of FIG.37, FIG.41(A)(B) are magnified view of essential part of FIG.37,

FIG.42 shows a sixth embodiment of the present invention .

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described more in detail with reference to the accompanying drawings.

FIG.l shows a first embodiment of a synthetic resin bottle cap of the present invention. This bottle cap 1 is made of entirely synthetic resin and consists of a side surface portion 3 and a top surface portion 2, and a stopper 4 is integrally formed at interior. And, a reinforcing ring 5 made of material being strong in strength than the cap is inserted into inner side of the stopper 4, and a band- shaped protrusion 6 is protruded around the external circumference of the stopper 4, and a circular inserting groove 7 to be inserted with the bottle opening and a fastening protrusion 8 to be fastened to outer side of the bottle opening are formed between the side surface portion 3 and the stopper 4 as shown in FIG.2 and FIG.3.

And, a pulling tab 9 is integrally provided to top surface portion 2, and about 3/4 of the pulling tab is attached in a point contacting form maintaining a predetermined distance at the top edge of the bottle cap, and remaining about 1/4 drops down in slant along the side surface portion 3 of the bottle cap and integrally attached to lower side end of the side surface portion with forming an adhering surface 9'. And, side surface cut out portion 10 is formed in two rows from a place that the pulling tab 9 and the side surface portion 3 are integrally attached, and this side surface cut out portion is connected in vertical on the side surface portion 3 and maintains a circular form to right and left at the top surface portion 2 and divided to right and left whereby circular cut out portion 12 having a non-cut out portion 11 is formed. On the other hand, the circular cut out portion 12, as shown in FIG.3, is made by forming a cut out groove from inside of the circular inserting groove 7 toward the top surface portion 2, and the side surface cut out portion 10 is made by oppositely forming a cut out groove from the outer side of the side surface toward the inner side.

And, the reinforce ring 5 to be inserted to inner side of the stopper 4 is a hollow tube type and formed with protruded portion 5' at a side end whereby a spatial portion 14 is formed between the reinforce ring

5 and the stopper 4.

The synthetic resin bottle cap 1 of the present invention constructed as these is covered to a bottle A in a manufactured state as shown in FIG.l, in case of covering it, it is forcibly covered by instantaneously applying a strong force to the bottle cap in a state that the cap is positioned to the opening of the bottle A, at this moment, the synthetic resin made bottle cap has an elasticity and hence instantaneously expanded whereby covered to the bottle and covered without damage of the cut out portion 12 and the side surface cut out portion 10, and such process is made by a presently using automatic machine.

Therefore, the stopper 4 portion is inserted into inside of the bottle A and closely contacted to the opening and more tightly contacted by the reinforce ring, and the fastening protrusion 8 at inner side of the side surface portion is hooked up by a fastening groove at outside of the bottle whereby it is not taken off. And, a protrusion 6 is formed at outer side of the stopper 4, and this protrusion 6 is closely contacted to inner side of the bottle by being forcibly pressed as shown in FIG.4, and the protrusion 6 portion is pushed toward the spatial portion 14 formed between the backward reinforce ring 5 and becomes to have a tension whereby more firmly and closely contacted to the opening of the bottle.

Accordingly, the synthetic resin made bottle cap 1 of the present invention as above makes complete hermetic sealing even if it is used for the carbonated beverage bottle same as using an existing metal made cap.

FIG.5 and FIG.6 show an operation taking off the synthetic resin made bottle cap 1 of the present invention from the bottle.

That is, in case of intending to take off the bottle cap 1 for drinking the contents material, firstly the pulling tab 9 is pulled to upward and a portion other than the adhering surface 9' with the side surface portion 3 is separated from the side surface portion 3 of the bottle cap 1. At this moment the pulling tab 9 is adhered in a point contacting form only at few points with the side surface portion 3, therefore it is easily separated even if a little force is applied.

When the pulling tab 9 is further pulled to upward in this state, the side surface cut out portion 10 is cut out and the cut out portion 3' is lifted up to upward as shown in FIG.5, and when it is continuously pulled, the cut out portion 12 formed to the top surface portion 2 of the bottle cap 1 is cut out in a state that the side surface portion 3 is successively covered around the opening of the bottle and the stopper 4 portion is taken off from the bottle, at this moment, when the cut out portion 12 is completely cut out up to the non-cut out portion 11, the stopper 4 portion is completely removed out from the opening of the bottle, and when it is successively pulled out, the side surface portion 3 is opened to right and left and the bottle cap is completely taken off from the bottle.

The form of the bottle cap 1 completely taken off from the bottle as this, although showing is deleted, becomes a form that the cut out portion 12 and the side cut out portion 10 is completely cut out and they are connected one another only at the non-cut out portion and the side surface portion 3 is completely cut out in its one side .

On the other hand, it is possible to use by changing the form and attached position of the pulling tab 9 in this embodiment, but in the bottle cap 1 formed with the side wall 3 in long, FIG(A)(B) are so constructed that the pulling tab 9 is integrally formed to the side wall but extended from the side surface cut out portion to the cut out portion 9'.

Accordingly, in case of using, when the pulling tab 9 is pulled up, the cut out portion 9' is firstly cut out and successively the side surface cut out portion 10 and the cut out portion 12 are cut out in turn and the stopper 4 is taken off from the bottle whereby the whole cap is taken off. FIG.8(A)(B) show that the position of the pulling tab 9 is simply placed at lower side of circumference of the side surface portion 3, which is same as a state of FIG.l.

FIG.9 shows that the pulling tab 9 is formed to be extended long to lower side of the side surface portion 3, and a hole 15 capable of inserting a finger is perforated on the pulling tab 9, and the adhering surface 9' abutting with the side surface portion is made to be free to bend, and a protrusion operating hole 16 is formed ^'to a center portion, a protrusion 17 is formed at the side surface portion 3 confronting with this protrusion operating hole 16, and said protrusion 17 is protruded to lower end of the side surface portion 3.

FIG.10(A)(B)(C) are cross sectional views of a state that the bottle cap shown in FIG.9 is covered to the bottle, which are cross sectional views for explaining a state of the pulling tab 9.

That is, the bottle cap 1 covered to the bottle A as figure A firstly by an automatic machine, of which pulling tab 9 is pressed to lower side by a continuous operation of the machine, and the pulling tab 9 becomes a state of aligned with the side surface portion 3 of the bottle cap, at this moment, the protrusion operating hole 16 formed to the pulling tab 9 forcibly pushes and turns over the protrusion 17 formed to the side surface portion 3 as figure B, and thereafter since a length of the protrusion 17 itself is slightly longer than a length of the protrusion operating hole 16, the pulling tab is hooked up by the protrusion 17 and it can not be returned to original position, and becomes maintained in a state of aligned with the side surface portion 3 of the bottle cap 1 to up and downward as figure C.

FIG.11 is a diagram constructed so as to be able to cover the pulling tab 9 on the top surface of the bottle cap 1. That is, the pulling tab 9 is Integrally formed from a point terminating with the cut out portion 10 to the connecting portion, which is made to cover the pulling tab 9 portion to the top surface of the bottle cap 1, in case of taking off the bottle cap, it is taken off as same as the previously mentioned method only when pulling the pulling tab 9 to upward.

That is, FIG.12 and FIG.13 are structures made to couple the reinforce ring 5 at the top surface portion of the bottle cap, which is so made that thickness of the stopper 4 portion of the bottle cap is made a little thick and simultaneously an inserting groove 19 is formed to this and a reinforce ring 5 of hermetically sealed form in top side is inserted to this so that a spatial portion 14 is formed between the external wall of the cap and the reinforce ring 5. At this moment, a hooking . groove 20 and a hooking protrusion 21 are formed to the inserting groove 19 and the reinforce ring 5 and they are made not to be taken off in a state of being once coupled, and In a state covered to the bottle,the protrusion portion 6 is pushed in toward the spatial portion 14 and a tension is produced and further closely contacted to the opening of the bottle whereby a hermetically sealing effect can be increased.

FIG.14 and FIG.15 are similar system with FIG.13, - 15 - in which the reinforce ring 5 coupled at the top surface portion of the bottle cap is a form of opened to up and downward, and it has a difference that a reinforcing rib 22 is formed to inner side surface 5 whereby a hermetical sealing effect and aesthetic sense are improved a little.

FIG.16 is a system inserting a separate sealing cap 23 to outer side of the stopper 4 of inner side of the bottle cap. That is, a hooking protrusion 28 is

10 formed at outer circumference of the stopper 4, a wing portion 24 is formed to the sealing cap 23, an annular band 25 is formed. at a side surface 29, and a spatial portion 26 is formed to opposite side of the annular band 25 while a hooking groove 27 is formed to its

15 upper side. Accordingly, when the sealing cap 23 is inserted to the stopper portion 4 and then covered to the bottle, as shown in FIG.17, the wing portion 24 of the sealing cap 23 seals by surrounding the bottle opening, the annular portion 25 is pushed to the

20 spatial portion 26 whereby a tension is produced, and further closely contacted to the inner surface of the bottle opening, therefore an entire sealing effect is further increased.

FIG.16 is a system inserting a separate sealing

25 cap 23 to outer side of the stopper 4 of inner side of the bottle cap. That is, a hooking protrusion 28 is formed at outer circumference of the stopper 4j a wing portion 24 is formed to the sealing cap 23, an annular band 25 is formed to a side surface 29, and a spatial portion 26 is defined to opposite side of the annular band 25 while a hooking groove 27 is defined at its upper side. Accordingly, when the sealing cap 23 is inserted to the stopper portion 4 and then covered to the bottle, as shown in FIG.17, the wing portion 24 of the sealing cap 23 surrounds the bottle opening and seals and the annular band portion is pushed to the spatial portion 26 and a tension is produced whereby further closely contacted to the inner surface of the bottle opening, therefore an entire sealing effect is further increased. FIG.18 is a structure so made that a wall body of the stopper 4 of the bottle cap is formed to a crease portion 30 so as to make a spatial portion 35 to be defined between the reinforce ring 5 and to have a tension when the stopper 4 contacts closely to the bottle whereby a sealing effect is further increased, and FIG.19 is a structure in which a spatial portion 32 is defined at inner side surface of the protrusion 6 formed at outer side of the stopper and a reinforce ring 5 formed with two protruded shoulders 31 is Inserted to couple, and the protrusion 6 receives a tension by the spatial portion 32 whereby a closely contacting force with the wall is increased.

FIG.20(A)(B) are structure in which a lower portion 33 of the bottle cap stopper is hermetically sealed but protruded roundly to lower side and the reinforce ring 5 is inserted into interior of the stopper at the top side of the bottle cap so as to be suitable for the carbonated beverage.

Claims

What is claimed is :

1. Synthetic resin made bottle cap which is characterized in that : as a bottle cap constructed by a top surface portion and a side surface portion and made of synthetic resin material,

A) a stopper is integrally formed at center of interior; B) a top surface cut out portion and side surface cut out portion are respectively formed to the top surface portion and the side surface portion;

C) a pulling tab is integrally formed at an end of the side cut out portion; D) an inserting groove is defined between the side surface cut out portion and the stopper, and a hermetic sealing promoting means, an imitation preventing means and the like are included.

2. Synthetic resin made bottle cap as defined in claim 1, wherein a protrusion is protruded at outer circumference of the stopper formed at inner center, a reinforce ring is inserted to inner sid-e, and a spatial portion id defined between the inner side of the protrusion and the reinforce ring.

3. Synthetic resin made bottle cap as defined in claim 1, wherein a pulling tab is integrally formed with a terminal end of the side surface cut out portion at one side while another side is fixed with point contact manner around upper end of the side surface portion. 5 4. Synthetic* resin made bottle cap as defined in claim 1, wherein said pulling tab is integrally made with a terminal end of the side surface cut out portion at one side and another side is fixed with point contact manner around the side surface portion end. G 5. Synthetic resin made bottle cap as defined in claim 1, wherein said pulling tab is integrally formed to a cut out portion at the bottle cap side surface itself by the cut out portion.

6. Synthetic resin made bottle cap as defined in 5 claim 1, wherein said pulling tab is integrally formed at the terminal end of the side surface cut out portion but it has a fixing means.

7. Synthetic resin made bottle cap as defined in claim 6, wherein said fixing means is an operating hole 0 of the protrusion protruded to lower side of the side surface portion and the protrusion formed to the pulling tab.

8. Synthetic resin made bottle cap as defined in claim 1, wherein it is manufactured in a cap form 5 capable of covering the pulling tab to the top surface of the bottle cap and connected with the side surface cut out portion by a connecting portion.

9. Synthetic resin made bottle cap as defined in claim 2, said reinforce ring is made in a sealed form in upper portion and inserted into interior of t he inserting hole formed at upper portion of the bottle cap, and a spatial portion is defined between the outer side of the stopper and the reinforce ring.

10. Synthetic resin made bottle cap as defined in claim 9, wherein top side of the reinforce ring is made in an open form.

11. Synthetic resin made bottle cap as defined in claim 1, wherein said sealing means is a matter covered with a sealing cap provided with a wing portion, an annular band portion and a spatial portion at exterior of the stopper.

12. Synthetic resin made bottle, cap as defined in claim 1, wherein said sealing means is formed with a crease portion in the wall body of the stopper.

13. Synthetic resin made bottle cap as defined in claim 1, wherein bottom surface of the stopper Is made to be recessed deeply and roundly to downward as a sealing means, and when receiving a pressure resistance, the bottom surface of the stopper is raised so as to make the side surface of the stopper to be strongly and closely contacted.

14. Synthetic resin made bottle cap as defined in claim 1, wherein the bottom surface of the stopper is made to be protruded roundly to upward as a sealing means, and when it becomes a vacuum state, the bottom surface of the stopper is going to descend so as to make the side surface of the stopper to be strongly and closely contacted to the bottle inner surface.

15. Synthetic resin made bottle cap which is characterized in that it is structured with a top surface portion and a side surface portion, a stopper and a pulling tab are integrally formed, a top surface portion of the synthetic resin made bottle cap having a cut out portion and a side surface cut out portion is made to be protruded to upward whereby wide space is provided, and a reinforce ring integrally formed with a tab is provided at lower side of the stopper.

16. Synthetic resin made bottle cap as defined in claim 1, wherein an imitation preventing band is integrally formed around the lower side of the bottle cap side surface portion as an imitation preventing means.

17. Synthetic resin made bottle cap as defined in claim 1, wherein a top surface portion of the stopper of the bottle cap is made to be deeply and roundly recessed to downward as an imitation preventing means, and a tension piece is integrally provided at the top surface so as to make the top surface itself to have a restoring force.

18. Synthetic resin made bottle cap as defined in claim 1, wherein a stopper top surface portion Is made to be roundly protruded to upward, and a tension piece is integrally provided to its lower surface so as to make the top surface itself to have a restoring force as an imitation preventing means.

19. Synthetic resin made bottle cap which Is characterized in that : as a bottle cap structured with a top surface portion and a side surface portion of considerably long form and made of synthetic resin material,

A) a stopper is integrally formed at central interior; B) side surface cut out grooves are formed at upper and lower circumferences of the side surface portion, and side surface cut out grooves for connecting upper and lower portions of them are formed;

C) a pulling tab is integrally formed at a upper side circumference of the side surface portion; and

D) a spiral groove is formed at an inner surface of the side surface portion.

20. Synthetic resin made bottle cap as defined in claim 19, wherein a pulling tab Is directly formed to the side surface portion of the bottle cap by a cut out groove, and said cut out groove is connected to the top surface cut out groove and the side surface cut out groove.

21. Synthetic resin made bottle cap as defined in claim 19, wherein said pulling tab is formed by contacting with the lower end of the side cut out groove, and a coupling protrusion is formed to the pulling tab while a coupling groove is formed at top side of the side surface portion.

22. Synthetic resin made bottle cap as defined in claim 19, wherein said pulling tab is formed by contacting to a lower end of the side surface cut out- groove connected with the cut out groove of the top surface, and a fixing means is provided.

23. Synthetic resin made bottle cap as defined in claim 19, said pulling tab is formed by abutting to the cut out groove of the top surface and a fixing means is provided.

24. synthetic resin made bottle cap as defined in claim 22 or 23, wherein said fixing means is a protrusion protruded to downward of the side surface portion and a protrusion operating hole formed to the pulling tab.

25. Synthetic resin made bottle cap as defined in claim 19, wherein said pulling tab is made to a same magnitude as a diameter of the bottle cap and connected to the bottle cap and the connecting portion so as to be able to Insert to the protrusion of the bottle cap.

26. In a synthetic resin made bottle cap which is structured by a side surface portion of long form integrally formed with a top surface portion and a pulling tab, and in which a stopper and an inserting groove are provided at the interior, a synthetic resin made bottle cap which is characterized in that : a gas discharging groove is formed to the outer surface of the stopper and the circumference of the inserting groove but a closely contacting portion is formed to the center portion of the inserting groove and the lower end of the stopper portion.

27. In a synthetic resin made bottle cap which includes a top surface portion and a side surface portion, and a stopper sealed in lower side and a pulling tab are integrally made, and a cut out groove is defined at the top surface portion and the side surface portion, a synthetic resin made bottle cap which is characterized in that a cap in which a stopper is formed to inner side and a cut out line is provided at circumference of the side surface portion is covered to the interior side.

28. In a synthetic resin made bottle cap which iε structured by a side surface portion and a top surface portion and formed with a cut out portion and a side surface cut out portion and a pulling tab is formed so as to be connected with the side surface cut out portion, and which is made to couple the reinforce ring at upper side of the stopper, a synthetic resin made bottle cap which is characterized in that a crescent shaped fixing piece is integrally formed to the lower circumference of the side surface portion, and a holding portion provided with a elastic portion is integrally formed at a lifting operation hole of the pulling tab.

29. Synthetic resin made bottle cap as defined in claim 28, wherein a cut out film having a pulling hook is integrally formed to the lower surface of the stopper and a cut. out portion is formed to the circumference of the cut out film, and a shaping portion reinforcing ring defined with a spatial portion is coupled to the top portion groove of the stopper.