CN1137012A

CN1137012A - Resin cap

Info

Publication number: CN1137012A
Application number: CN96102936A
Authority: CN
Inventors: 近江英彦; 久保建夫; 熊田光雄
Original assignee: Japan Crown Cork Co Ltd
Current assignee: Nippon Closures Co Ltd
Priority date: 1995-03-03
Filing date: 1996-03-04
Publication date: 1996-12-04
Anticipated expiration: 2016-03-04
Also published as: IN192642B; EP0729895B1; KR100436630B1; SA96170026A; DE69630551D1; KR960034023A; CN1071254C; JPH08244802A; DE69630551T2; EP0729895A3; EP0729895A2; JP3492007B2

Abstract

The resin cap of this invention comprises a cap proper provided with a skirt portion and a continuous ring member provided so as to cover the outer surface of the skirt portion of the cap proper. A plurality of axially extending cuts are circumferentially spaced in the skirt portion of the cap proper, and the skirt portion of the cap proper and the ring-like member are separated via a cutting surface, but are integrally formed via a plurality of frangible bridge portions or connecting portions upwardly or downwardly of the cutting surface. The outer surface of the skirt portion of the cap proper and the inner surface of the ring-like member are intimately adhered at a portion of the cutting surface. This cap can form a sealing structure having sealing reliability, and can be opened without using any particular tool. Furthermore, it has excellent tamper-evident characteristics.

Description

Resin cap

The present invention relates to a kind of resin cap, more particularly, relate to a kind of energy and form splendid sealing property, be easy to correctly open and have the resin cap of usurping obvious property (tamper-evident) with splendid sealing reliability energy and unlatching performance.

Because resin cap can be integrally molded, and molded property and flexible splendid, thereby can it be fitted into the mouth of a container by capping plug operation, therefore, the resin cap of multiple this pattern has been arranged up to now.

Now had and multiplely had splendid leak tightness, need not the patent application that any instrument could take off and have the resin cap of splendid unlatching performance from bottle neck.For example, describe a kind of cover piece of making by artificial resin that can prevent improper operation among the Japanese patent application publication No. NO.10555/1976, had a draw ring on the outside face of the skirt cover wall (sidewall) of this cover piece.The outer peripheral face of the draw ring of this cover piece and skirt cover wall separates and is centered on.This draw ring is not a complete ring, but is circular-arc, and its two ends are connected on the outside face of skirt cover wall securely.The inside face of draw ring is connected in the outside face of skirt cover wall by a plurality of attaching partss that are easy to fracture that are formed on the circumferential suitable interval.Thereby when upwards pulling was contained in the draw ring of the cover piece on the container with hand, described attaching parts fractureed and draw ring only links to each other with skirt cover wall in two end.By further upwards spurring draw ring, described skirt cover wall never forms the part (between two ends of described draw ring) of draw ring and upwards digs, and cover piece is just from container by breakdown like this.

This kind prior art is very good, and this is to need not the plastic closure that the special-purpose instrument of lid opener and so on can be opened with hand because it provides a kind of, and this lid also has the function that prevents improper action.Yet it is having problem aspect the sealing reliability energy.Circumferential all projections are to form on the inside face of skirt cover wall, and when the neck seal of these projections and container, container has obtained sealing.In above-mentioned cover piece, can not projection all be set at the whole periphery of skirt cover wall inside face.In order to open lid, just can not form projection in the part that does not form draw ring with hand.If this part is provided with projection, skirt cover wall just can not be dug easily, and opening performance just can be not satisfactory.Because the whole periphery at skirt cover wall inside face all is not provided with projection, thereby the sealing reliability of the cover piece of above-mentioned prior art can not be satisfactory.

Thereby one object of the present invention is to provide a kind of resin cap with hermetically-sealed construction, but its mat one capping plug operation and have sealing reliability, and need not any specialist tools and can open simply, and have the characteristic of usurping obvious property.

Another object of the present invention is to provide a kind of resin cap, when closed container, it has the skirt cover part that a circular element is being gone along with sb. to guard him a cap body, after covered container, this circular element is close to the skirt cover outside face partly of cap body to guarantee sealing property, and this circular element is removed when opening lid, thereby skirt cover part can open out from container finish at an easy rate, in addition, described circular element has and usurps obvious characteristic.

The invention provides a kind of resinous lid, it comprises: a cap body, this main body comprise an end face and a skirt cover part, described skirt cover partly have one and the interface of container finish match and the leak free projection; And one and cap body integrally formed to cover the circular element of skirt cover outer surface, wherein, be provided with a plurality of notches that extend at axis direction at certain intervals in skirt cover part outer peripheral edges, described skirt cover partial sum circular element separates by cut surface, but the bridgeware by a plurality of frangibility couples together, also can have a hinge portion if desired, the outside face of skirt cover part and the inside face of circular element closely contact each other at cutting part.

In the present invention, the part of described circular element preferably is provided with one and opens tongue piece.

The skirt cover partial sum circular element of cap body preferably forms by the method for injection moulding or compression molded, and then cuts out a cut surface with the parting tool between, the other parts except bridgeware or connecting bridge separately.

Lid of the present invention comprises that the skirt cover part and in the cap body covers in the circular element of skirt cover part outside face, be provided with a plurality of notches that extend along axis direction at certain intervals on the outer peripheral edges of the skirt cover part of cap body, the skirt cover partial sum circular element of described cap body separates by cut surface, this skirt cover partial sum circular element forms by bridgeware or other connecting bridges of a plurality of frangibility at cut surface upside or downside, and the outside face of the skirt cover part of cap body and the inside face of circular element closely contact each other in the cut surface part.

Be provided with a plurality of notches that extend along axis direction at certain intervals on the outer peripheral edges of the skirt cover part of cap body, skirt cover part just radially expands outwardly when lid is opened like this, and the main body of lid is opened out from the mouth of container at an easy rate.

Among the present invention, the skirt cover partial sum circular element of cap body separates by cut surface, but they form by bridgeware or other connecting bridges of a plurality of frangibility at cut surface upside or downside, and the outside face of the skirt cover part of cap body and the inside face of circular element are close together each other in the cut surface part.

At first, skirt cover partial sum circular element is close together at the cut surface place, make the skirt cover part of cap body under closed state, be subjected to sealing of circular element or fixing at least, thus prevented the skirt cover partly expand outwardly and guaranteed and the mouth of container between sealing.This feature partly is provided with at the skirt cover under the situation of the present invention of the notch that axis direction extends and seems particularly important.All notches on the skirt cover part have weakened driving fit effect or the closed state between the projection of the mouth of container and skirt cover part, but because circumferentially the sealing and fix of circular element, it is firm and accurate that described driving fit effect becomes.

Owing at cut surface upside or downside the bridgeware of a plurality of frangibility or skirt cover partial sum circular element that connecting bridge is connecting cap body are arranged, thereby have prevented that just cut surface from influencing bridgeware or connecting bridge unfriendly.When closure cap, because the outside face of the skirt cover of cap body part and the inside face of circular element closely contact each other, thereby can prevent that external force is applied on the bridgeware that fractures easily, so when closure cap, advantageously protected bridgeware.

Open tongue piece owing to be formed with one in the present invention on the part of circular element, thereby this tongue piece of push-and-pull up or down just can make circular element and skirt cover part throw off at the cut surface place, thereby makes the bridgeware that is connecting cap body and circular element be subjected to the effect of a shearing force and disconnect.Because the skirt cover of cap body has formed all notches on partly, so after circular element was partly removed from the skirt cover, skirt cover part just can freely radially outward be expanded.Like this, cap body just can be at an easy rate opens out and need not serviceable tool and can easily be opened from the mouth of container.

On the outside face of opening tongue piece, be provided with a plurality of fins, open the intensity of tongue piece or clearly illustrate its position so that strengthen.

When lid was opened, bridgeware was fractureed, and circular element can move up or down.Thereby know that just lid was opened.This just further provides usurps obvious characteristic.

Because the skirt cover partial sum circular element of cap body of the present invention integrally forms by injection moulding or compression molded, then between cuts out the slit by parting tool so that the part except bridgeware or connecting bridge is separated, so their available moulds of usually being made up of a core rod and die cavity are produced, and molded operation is simple.

Only be easy to the bridgeware that fractures between the skirt cover partial sum circular element of cap body, like this, cap body can be separated with circular element when opening lid.In this case, circular element is made that by dialysis usurping obvious characteristic becomes more obvious.In addition, after the circular element dialysis, available proficiency is pointed to and is gone up the lower end that promotes skirt cover part, because notch is arranged, the main body of lid is opened out at an easy rate.

Be provided with connecting bridge at the opposite side of tongue piece, when opening lid, just can fracture by push-and-pull tongue piece bridgeware up or down in order to the skirt cover partial sum circular element that connects cap body.Subsequently, by the ring tab shape element that makes progress the mouth of the skirt cover partial sum container of cap body is thrown off.In this case, circular element can advantageously be taken as the draw ring of opening cap body.

The summit portion of lid can be provided with ring in, the inner peripheral driving fit of ring and container finish in this.In this case, also obtain sealing, thereby sealing becomes more accurate and reliable at the inner peripheral of container finish.

In lid of the present invention, the lower end of circular element can be positioned under the skirt cover lower end partly of cap body.Like this, the lower end of the skirt cover of cap body part just is hidden in the circular element.When opening lid when inserting the lower end of skirt cover part with an instrument, bridgeware will inevitably be fractureed, and usurps obvious characteristic so also just strengthened.

In addition, the lower end of the skirt cover of the lower end of circular element and cap body part can be positioned on the same horizontal surface.In this case, when adorning empty lid, can prevent that just external force is added on the bridgeware thereby can prevents the bridging part that fractures.

In addition, roughly become 90 ° ground that one the part of weakness such as otch can be set at the tongue piece of the relative circular element in circular element bottom.When pulling is upwards opened tongue piece when opening lid, because circular element is bent and in the vulnerable part fracture, thereby whether lid was opened and just became very clear.When opening the opposite side of tongue piece, that is to say that this vulnerable part is bent and destroys when opening by force in the connecting portion office, so just know whether and carried out opening improperly with instrument.

In addition, in the top or the bottom of connecting bridge the weak part of part can be set.When instrument insertion connecting bridge carried out improper unlatching, circular element was outwards opened, and instrument has also just been thrown off.Like this, usurping obvious characteristic just increases again.

To usurp obvious characteristic in order improving, the weak part of a plurality of parts can be set at the summit portion of connecting bridge one side.When with instrument when connecting bridge one side is carried out improper unlatching, the summit portion of lid splits, thereby just can know and carried out improper unlatching.

In lid of the present invention, interior ring can have a bevelled ora terminalis, and interior like this ring is longer relatively in tongue piece one side, and shorter relatively in connecting bridge one side.As previously mentioned, can open cap body by the circular element that promotes that side of connecting bridge.When connecting bridge one side is opened, gas can be overflowed from short interior ring place, prevent that effectively the material in the container from going out, and just comes up quickly.

Can reach the above-mentioned effect of going out of preventing too effectively by the part that all weakening is set on the inside face of connecting bridge one side of interior ring.This set makes the interior ring of that side of connecting bridge be easy to distortion, thereby the gas in the container can be discharged effectively by interior ring.

In addition, the summit portion at interior ring inside face can be provided with one deck gas barrier material with the method for inserted mode system.This set can prevent that gas permeation plastics tegmental wall from oozing out, thereby can improve the preservation quality of content.

In addition, in lid of the present invention, can be provided with and project upwards forming a complete ring of summit portion outer peripheral edges or interrupted ring, thereby can prevent that the container that has described lid from bothering each other in loading process.When adorning carbonated beverage in the container, the end face of lid can swell.So when loading this container, the summit portion pressurized of protuberance, thereby the driving fit projection of skirt cover part is expanded and cause the leak free unfailing performance to reduce, and just can prevent this inconvenience by forming above-mentioned ring.

Fig. 1 is the lateral plan that lid of the present invention is shown;

Fig. 2 is the upward view of lid among Fig. 1;

Fig. 3 cuts open the cutaway view of getting along Fig. 2 center line A-A;

Fig. 4 cuts open the cutaway view of getting along Fig. 2 center line A-B, and lid wherein has been contained in the mouth of container;

Fig. 5 is the birds-eye view of lid among Fig. 4;

Fig. 6 illustrates the scheme drawing of lid under opening among Fig. 4;

Fig. 7 is the upward view of the lid of lower surface on same horizontal surface of another embodiment;

Fig. 8 cuts open the cutaway view of getting along Fig. 7 center line A-A;

Fig. 9 is the upward view of the embodiment of another lid that connecting bridge is not set;

Figure 10 cuts open the cutaway view of getting along Fig. 9 center line A-A;

Figure 11 is the upward view that connecting bridge and rear surface are in the lid on the same horizontal surface that is not provided with of another embodiment;

Figure 12 cuts open the cutaway view of getting along Figure 11 center line A-A;

Figure 13 is the upper surface birds-eye view of the lid of an embodiment, and the otch that is provided with on it is not exposed on the outer peripheral edges of skirt cover part;

Figure 14 is the front elevation of lid among Figure 13;

Figure 15 is the upward view of lid among Figure 13;

Figure 16 is the cutaway view of lid among Figure 13;

Figure 17 is the left view of lid among Figure 13;

Figure 18 is the birds-eye view of upper surface of the lid of an embodiment, and bridgeware wherein and connecting bridge are arranged on the upside of cut surface;

Figure 19 is the front elevation of lid among Figure 18;

Figure 20 is the upper surface birds-eye view of lid among Figure 18;

Figure 21 is the cutaway view of lid among Figure 18; And

Figure 22 is the left view of lid among Figure 18.

The present invention is described below with reference to accompanying drawings.

From the lateral plan (Fig. 1) of lid that one embodiment of the invention are shown, upward view (Fig. 2), cut open in the cutaway view (Fig. 4) got and the upper surface view (Fig. 5) as can be seen along the cutaway view (Fig. 3) of A-A ' line Fig. 2, mouth that lid is contained in container and along the A-B line, say that roughly lid of the present invention is made up of cap body 1 and circular element 2.Cap body 1 is made up of from the skirt cover part 4 of the outer peripheral edges drawdown of end face 3 summit portion 3 and.

Clearly visible from Fig. 4, be formed with the projection 7 of concave part 6 driving fits on the outer circumferential side with container finish on the inner peripheral of skirt cover part 4, so that make the mouth of container and the medial surface of summit portion 3 closely contact and realize sealing, in this example, summit portion 3 inboards are provided with one and the interior ring 8 of interior all side driving fits of the mouth 5 of container, thereby also realize sealing in interior all sides of the mouth 5 of container, make that sealing is more reliable and accurate.

Circular element 2 is not what separate, and it is arranged to a form that covers in the continuous loop of a skirt cover part at least.Be provided with a plurality of notch or otch 9 that extend at axis direction on the periphery of the skirt cover part 4 of the cap body 1 that covers in by circular element 2 at certain intervals.The skirt cover part 4 of described cap body 1 and circular element 2 are by cut surface 10 separately, skirt cover part 4 forms with (hinged) part 12 that is connected that can not fracture by a plurality of bridgewares 11 that are positioned at the frangibility of cut surface 10 belows with circular element 2, when cap body 1 is filled in the mouth 5 of container (as Fig. 4), the outside face of the skirt cover part 4 of cap body and the inside face of circular element closely link to each other each other at cut surface 10 places.

Radially outward prominently on the part of circular element 2 established one and opened tongue piece 13, when opening lid, pinched just push-and-pull circular element 2 up and down of this tongue piece.As shown in Figure 5, radially extended a fin 14 on the unlatching tongue piece 13 to strengthen unlatching tongue piece 13 or to show its position.

Be provided with a plurality of axially extended notches on the skirt cover part 4 of cap body 1, (at this moment circular element 2 is removed) skirt cover part 4 just can radially expand outwardly when lid is opened, thereby just can break away from closed state between the inside projection 7 of the recess 6 of the outer peripheral face of container finish and skirt cover part, and make the main body 1 of lid be easy in the mouth 5 of container, open out.The quantity of otch 9 or the transverse pitch of these otch can suitably be set.

In lid of the present invention, the quantity of skirt cover part 4 upper cuts can be set according to the diameter of lid, but preferably 2 to 20, particularly between 8 to 12.

Skirt cover part 4 and circular element 2 closely are bonded at cut surface 10 places, make the skirt cover part 4 of cap body under closed state, be subjected to sealing of circular element or fixing at least, thus prevent skirt cover part 4 expand outwardly and guaranteed and the mouth of container between sealing.Partly be provided with at the skirt cover under the situation of lid of the present invention of the notch that axis direction extends, a condition that fits tightly is extremely important.All notches on the skirt cover part have weakened the recess 6 of container finish outer peripheral edges and the driving fit between the skirt cover projection 7 partly.But because circular element circumferentially seals and fix, described driving fit effect is still very firm and accurately.

Owing to the bridgeware 11 of a plurality of frangibility at cut surface 10 downsides or skirt cover part 4 and the circular element 2 that connecting bridge 12 is connecting cap body are arranged, thereby have prevented that just the cut channel of cut surface 10 from influencing bridgeware 11 or connecting bridge 12 unfriendly.When closure cap; because the outside face of the skirt cover part 4 of cap body and the inside face of circular element 2 closely contact each other at cut surface 10 places; prevented that external force is applied on the bridgeware of frangibility, so when closure cap, protected bridgeware perfectly.

In the present invention, the skirt cover part 4 of cap body and circular element 2 closely fit together by cut surface, and the formation of bridgeware 11 and connecting bridge 12 can form with injection molding or compression molded earlier, between forms a kerf by parting tool subsequently, the part except bridgeware 11 or connecting bridge 12 separately.So lid of the present invention can be produced in the very short cycle efficiently with the mould of usually being made up of a core rod and die cavity, and the precision of the various piece of lid is all very high, substandard products are considerably less.

The quantity of bridgeware 11 is arranged to such an extent that make between skirt cover member 4a between per two

adjacent otch

9,9 and the circular element and couple together by at least one bridgeware 11 between the skirt cover part 4 of cap body and the circular element 2.The position that bridgeware 11 is provided with can be different.For example, as shown in Figure 2, on the transom 4a bridgeware can be set, perhaps also two bridgeware parts can be set at the two ends of bridge member 4a.The not special restriction in the quantity of bridgeware part and position, bridgeware is easy to fracture when opening lid as long as can prevent when closure cap that bridgeware from fractureing.The sectional area of bridgeware part 11 on the direction of its cut surface 10 preferably each bridgeware is 0.1 to 0.8mm2, and especially 0.2 to 0.4mm2 for better.

The radially outward prominent unlatching tongue piece 13 of having established on the part of circular element 2.This opens the position of tongue piece and the position opposite (becoming 180 °) of connecting bridge 12.Open tongue piece 13 by push-and-pull up or down and can make circular element and skirt cover part at the cut surface place separately, the bridgeware 11 of at this moment getting in touch cap body 1 and circular element 2 is cut off under the effect of a shearing force.

Situation when Fig. 6 shows enhancing ring linear element 2.Owing to be provided with otch or notch 9 on the skirt cover part 4 of cap body, thus when circular element 2 when skirt cover part 4 is removed, skirt cover member 4a just can freely radially outward expand, so cap body 1 just can be at an easy rate from the mouth taking-up of container.So, need not to use any special instrument openable container simply.Because circular element 2 is fixedly linked at connecting bridge 12 places and cap body in Fig. 6, and can be used as the gripping apparatus that upwards promotes, at this moment connecting bridge 12 becomes a fulcrum, and cap body 1 can open out easily.

When lid was opened, bridgeware 11 was fractureed, and circular element 2 can freely move up and down.Under this state, can find out that just lid was opened.By the breaking and twist also as can be seen whether lid was opened of vulnerable part 17, thereby just given and usurped obvious characteristic.

The multiple mechanism that prevents improper unlatching can be set on the lid of the present invention and show that lid is already by the mechanism of improper unlatching.Some such mechanisms have been shown among Fig. 4.

In the embodiment of lid shown in Figure 4, the lower end 15 of circular element 2 is positioned under the lower end 16 of skirt cover part 4 of cap body.Like this, the lower end 16 of the skirt cover part of cap body is just stashed by circular element 2, so when the lower end 16 insertion instruments of skirt cover part are attempted to open lid, 11 fractures of bridgeware part, thereby know that just lid was opened, improved and usurped obvious characteristic.More suitable is that the lower end 15 of circular element 2 is extended above skirt cover part lower end 16 about 0.8 to 1.2mm downwards.

Also can be in the bottom of circular element 2, open tongue piece 13 relatively and become can be provided with on 90 ° the direction a vulnerable part such as a kerf 17 approximately to show whether lid was opened.When upwards tongue piece was opened in push-and-pull with the unlatching lid, vulnerable part 17 broke and twists (this distortion is a plastic deformation).Even if it returns original state, also can know to be opened, usurp obvious characteristic and more improve.Thereby, when with an instrument from opening the opposite side of tongue piece, just when connecting bridge 12 1 sides were opened lid forcibly, vulnerable part 17 broke, so just know and carried out opening improperly.

In addition, can be provided with the weak part of a part on the top of connecting bridge 12, a groove 18 just perhaps can respectively be provided with a vulnerable part at the two ends of the bottom of connecting bridge 12, and just a kerf 19.When attempting to insert connecting bridge when opening lid undeservedly with an instrument, circular element is outwards opened, and instrument is thrown off, and this has also strengthened usurps obvious characteristic.

In order to strengthen usurping obvious characteristic, connecting bridge 12 these sides of summit portion 3 can be provided with the weak part 20 of a part.Thereby when inserting connecting bridge 12 these sides with an instrument and open improperly, summit portion 3 distortion of lid or break are so just know and opened undeservedly.

In the specific embodiment of lid shown in Figure 4, interior ring 8 has a bevelled ora terminalis, and interior like this ring is longer relatively in a side 21 of opening tongue piece, and shorter relatively in a side 22 of connecting bridge.As previously mentioned, can be by opening out cap body from connecting bridge 12 those side enhancing ring linear elements 2.When connecting bridge 12 1 sides are opened lid, there is gas to overflow from short interior ring 22 places, prevented going out of material in the container effectively, just come up quickly.

Can reach the above-mentioned effect that material is gone out in the container that prevents too effectively by the part 23 that a weakness is set on the inside face of the interior ring of connecting bridge one side of interior ring.This set makes the interior ring of that side of connecting bridge be easy to distortion, thereby the gas in the container can be discharged effectively by interior ring 22 parts.

In addition, the summit portion at the inside face of interior ring 8 can be provided with one deck gas barrier material with the method for inserted mode system.This set can prevent that gas permeation plastics tegmental wall from oozing out, thereby has improved the preservation quality of content.This gas barrier material can be the metallic paper of aluminium foil and so on for example, and such as ethylene/vinyl alcohol copolymer, Koroseal, vinylidene resin, nylon resin gas is played the resin of barrier effect and the polyester material of barrier gas.

Combine without the gas barrier material or with the gas barrier material, can one oxygen uptake layer be set at summit portion.For example can make this oxygen uptake layer with the oxygen uptake medium of the swage of a kind of disperse in resin.

In the lid of specific embodiment shown in Figure 4, can be provided with to upper process and form a complete ring of outer peripheral edges or interrupted ring 25 at summit portion 3.So just can prevent to have the problem that the container of described lid is taken place to each other in loading process.When adorning carbonated beverage in the container, the end face of lid can swell phenomenon.So when loading this container, the summit portion pressurized of protuberance, thereby thereby the driving fit jut branch of skirt cover part radially expand and reduce the leak free unfailing performance, but just can prevent this inconvenience by forming above-mentioned ring 25.

At Fig. 1 (Fig. 1 is more clear) in lid shown in Figure 5, otch 9 is exposed to Outboard Sections.The advantage of the lid of these examples is that those contents that are bonded at mouth when putting into content can be washed off or get rid of by all otch 9.

At other examples, to cut open in the lid shown in the cutaway view of getting (Fig. 8) as upward view (Fig. 7) with along Fig. 7 center line A-A ', the lower end 16 of the skirt cover part 4 of the lower end 15 of circular element 2 and cap body can be arranged on the same horizontal surface.In this case, just can prevent effectively has external force to be added on the bridgeware 11 when the dress lid, thereby can prevent the fracture of connecting bridge 11.

Also having some examples, cut open in the lid shown in the cutaway view of getting (Figure 10) as upward view (Fig. 9) with along Fig. 9 center line A-A ', have only bridgeware 11 between the skirt cover part 4 of cap body and the circular element 2, connecting bridge 12 is not set at the opposite side of opening tongue piece.When opening lid, cap body 1 and circular element 2 cut off and are separated from each other.In this case, circular element 2 dialysis, thereby usurp obvious characteristic and become more obvious.In addition, although circular element 2 has disconnected, hold 16 to add otch or notch 9 with pointing on the other hand to push, thereby also can open the main body of lid at an easy rate.

When only linking to each other between skirt cover part 4 and the circular element 2 by the bridgeware 11 of frangibility, open tongue piece and just be not limited to have only one, two tongue pieces can be set on the position of symmetry.And, the tongue piece more than two can also be set.

In the embodiment of Figure 11 that looks up and the lid shown in the Figure 12 that analyses and observe, the lower end 16 of the skirt cover part 4 of cap body and the lower end 15 of circular element 2 are on the same horizontal surface.Other is all identical with lid among Figure 10 with Fig. 9.

In the present invention, all otch 9 can be arranged to not be exposed on the outer peripheral face of skirt cover part.Birds-eye view (Figure 13), front elevation (Figure 14), upward view (Figure 15), cutaway view (Figure 16) and left view (Figure 17) show such example, and wherein the structure of each parts is identical with above-mentioned structure.But hide part 26 for otch 9 is provided with, so that otch 9 does not reach the outside face of skirt cover part 4, thereby otch 9 is hidden by the upper surface of skirt cover part fully.The advantage of the lid of this example is to prevent that dust from entering otch 9, has guaranteed the health of lid.

In the above-described embodiments, bridgeware 11 and connecting bridge 12 are arranged on cut surface 10 belows, but bridgeware among the present invention and connecting bridge also can be arranged on the cut surface.Birds-eye view (Figure 18), front elevation (Figure 19), upward view (Figure 20), cutaway view (Figure 21) and left view (Figure 22) show such example, wherein the structure of each parts is identical with above-mentioned structure, but bridgeware 11 and connecting bridge 12 are formed on the cut surface top.In this case, from outside a glance as seen whether bridgeware 11 thereby help observing lid and be opened.

The resin that can be used for forming lid is a lot, such as the polyethylene of basic, normal, high density, polyethylene, polypropylene, thermoplastic polyester, amilan, styrene resin and the ABC resin of linea low density.

Plastic closure of the present invention forms with above-mentioned resins, and cap body and circular element form with methods such as injection molding or compression molded.Normally after molded step, make cut surface by a cutting operation again.Certainly, cut surface also can form in molded step.

Can add a liner in addition on the cap body.In this case, can use the plastisol of low-density polyethylene, ethylene copolymer, various rubber or themoplasticity neoprene, acrylic resin, the plastisol of Koroseal.

Above-mentioned structure of the present invention can form a kind of hermetically-sealed construction, and it has when closed with covers Splendid sealing reliability energy, and when lid is opened, need not any specialist tools can the letter Singly open, and have and usurp obvious characteristic. In addition, when closed container, a ring-type unit Part is being gone along with sb. to guard him the skirt cover part of cap body, and this circular element is close to lid when sealing is finished The outer surface of the skirt cover part of main body is to guarantee sealing property, and this circular element is being opened lid In time, removed, thereby skirt cover part can open out from container finish at an easy rate. In addition, its advantage Be that described circular element has usurps obvious characteristic.

Claims

1. resinous lid, it comprises: a cap body, this main body comprise an end face and a skirt cover part, described skirt cover partly have one and the container finish interface match and the leak free projection; And one and cap body integrally formed to cover the circular element of skirt cover outer surface, wherein, be provided with a plurality of notches that extend at axis direction at certain intervals in skirt cover part outer peripheral edges, described skirt cover partial sum circular element separates by cut surface, but the bridgeware by a plurality of frangibility couples together, also can have a hinge portion if desired, the outside face of skirt cover part and the inside face of circular element closely contact each other at cutting part.

2. lid as claimed in claim 1 is characterized in that, described unlatching tongue piece is formed on the part of circular element.

3. lid as claimed in claim 1, it is characterized in that, after injection moulding and compression molded are finished, between the inside face of the outside face of the skirt cover part of described cap body and circular element, form a cutting part, so that the other parts except bridgeware and connecting bridge separately.

4. as claim 1 or 3 described lids, it is characterized in that, only formed the bridgeware of frangibility between the skirt cover partial sum circular element of cap body, when lid was opened, cap body and circular element were separately.

5. lid as claimed in claim 2, it is characterized in that, opposite side at tongue piece is provided with a junction branch the skirt cover partial sum circular element of cap body is got in touch or couple together, when opening lid, the push-and-pull tongue piece is with the bridgeware that fractures up and down, and then mentions circular element the mouth of the skirt cover partial sum container of cap body is thrown off.

6. lid as claimed in claim 1 is characterized in that, described summit portion is provided with one and the interior ring of interior all side driving fits of container finish.

7. lid as claimed in claim 1 is characterized in that, the lower end of described circular element is positioned under the skirt cover lower end partly of described cap body.

8. lid as claimed in claim 1 is characterized in that, the lower end of the skirt cover part of the lower end of described circular element and described cap body is positioned on the same horizontal surface.

9. lid as claimed in claim 2 is characterized in that, becomes 90 ° place to be provided with a vulnerable part approximately at the tongue piece of described relatively circular element, opens so that be clearly shown that improperly.

10. lid as claimed in claim 5 is characterized in that, is provided with the weak part of a part in the top or the bottom of described connecting bridge.

11. lid as claimed in claim 5 is characterized in that, is provided with the weak part of a part at the end face position of described connecting bridge.

12. lid as claimed in claim 6 is characterized in that, described interior ring is longer relatively in tongue piece one side, and interior ring is shorter relatively in connecting bridge one side.

13. lid as claimed in claim 12 is characterized in that, in connecting bridge one side, the inside face of described interior ring is provided with a vulnerable part.

14. lid as claimed in claim 6 is characterized in that, described in the summit portion of inside face of ring inserted mode system one gas barrier material.

15. lid as claimed in claim 1 is characterized in that, is provided with a prominent ring complete or that be interrupted in the outer peripheral edges of described summit portion.

16. lid as claimed in claim 2 is characterized in that, is provided with a plurality of fins on the connecting bridge between the upper surface of described unlatching tongue piece and the described skirt cover part.