CN1474775A

CN1474775A - Removable closure device

Info

Publication number: CN1474775A
Application number: CNA01818801XA
Authority: CN
Inventors: 安德鲁・M・博耶; 安德鲁·M·博耶; ・L・比松; 杰拉德·L·比松; ・A・罗马尼亚奇; 贝尼托·A·罗马尼亚奇; D・吉布斯; 里基·D·吉布斯
Original assignee: Procter and Gamble Ltd
Current assignee: Procter and Gamble Ltd; Procter and Gamble Co
Priority date: 2000-11-13
Filing date: 2001-11-13
Publication date: 2004-02-11
Also published as: BR0115267A; AU2002230666A1; EP1334046A2; WO2002038462A3; CA2424582A1; MXPA03004200A; WO2002038462A2; JP2004513036A; US20020117500A1

Abstract

A membrane lid with a surface with a substantially triangular-shaped perimeter. The perimeter includes first, second and third corner portions, wherein each corner portion is bisected by an imaginary line. The membrane lid further includes a projection with a tab and adapted to initially direct a lifting force to at least one of the corner portions. The projection either extends outwardly from the perimeter such that the projection is non-symmetrically disposed with respect to the imaginary line of any adjacent corner portion, or the projection extends non-continuously from an adjacent corner portion and is substantially symmetrically disposed with respect to the imaginary line of the adjacent corner portion. Containers are also provided with a lip having a substantially triangular-shaped horizontal cross-section. The lip includes three corner portions and three sides, wherein the sides of the lip are structured differently than the corner portions of the lip to increase the relative rigidity of the sides with respect to the corner portions such that the corner portions and the sides are adapted to exhibit a substantially uniform reaction pressure when applying a membrane lid to the lip of the container.

Description

Removable closure

The cross reference of related application

The application requires to benefit from U.S. Provisional Application 60/248,026 and 60/248,340, and they are filed on November 13rd, 2000 separately, and each application all is incorporated herein by reference.

Invention field

The present invention relates to container provides a kind of capping, especially relate to a kind of removable closure is provided.

Background of invention

Preformed snack chip is frangible typically, also may be frangible and easy breakage in packing, transportation and/or other handling process.Traditional packing technique provides sack and/or box, and this class sack and/or box just break a large amount of snack chips or crushed before consumption.The most well-known Pringles ^The potato chips of shape is the Procter ﹠amp that is positioned at the Cincinnati, Ohio; A kind of product of Gamble company, these independently snack chip be " saddle " shape, its manner of packing has overcome the shortcoming of prior art.Pringles ^Snack chip is packaged in a kind of cylindrical container in the nested mode of piling up of a kind of mono-usually, and this packing has strengthened in packing, transportation and/or other handling process the protection of snack chip.Thereby, Pringles ^Snack chip can be presented in face of the customer usually intactly.

Need to continue a kind of user-friendly and relatively inexpensive again container to be used to pack frangible snack chip, in packing, transportation and/or other handling process, to provide protection.Further expectation can be provided for the block of container to protect a kind of film cover and/or provide capping for a kind of container after removing film cover to small part.

Also wishing provides this type of cheap container for the frangible and/or crisp goods of other type, to reduce the goods breakage that causes in transportation and/or other handling process, with the desirable performance of maintenance goods, and provides a kind of user-friendly packing.

Summary of the invention

Therefore, the present invention is applicable to that in order to provide a kind of the removable formula capping of container has proposed various structure.

In first embodiment, provide a kind of membrane cover.This membrane cover comprises a surface with the periphery that is generally triangular.This periphery comprises first, second, third angle part, wherein each angle part by an imaginary line to dividing.This membrane cover also comprises the bossing that has a band protrusion, and it is used for guiding a hoisting force after adjusting at first, makes this power at least towards an angle part.This projection or stretch out from periphery, its imaginary line right and wrong with respect to any part of adjacent angular with it are symmetrically arranged like this, or from a discontinuous extension in adjacent with it angle part, and its imaginary line with respect to any adjacent with it angle part is symmetrically arranged.

In another embodiment, provide a kind of container that has antelabium, this antelabium has a level cross-sectionn that is generally triangular.Antelabium comprises three angle parts and three limits, wherein the structure of the angle part of the structure on the limit of antelabium and antelabium is different, this is in order to increase the relative rigidity of limit with respect to the angle part, so that in the time of on the antelabium that membrane cover is applied to container, limit and angle part can produce a basic antagonistic force uniformly through adjusting.

Membrane cover of the present invention, container lip and container are favourable to packing articles, and for example, it can prevent that the product that is generally triangular from breaking.For instance, structure of the present invention can be used for packing tortilla chips and similar products, to be product and the prolongation product frame Tibetan phase that the customer provides the preceding minimum rupture rate of consumption easily.

Membrane cover of the present invention can be used one and have high reliability and it is had the block of minimum interference effect.Membrane cover of the present invention can remove in needs easily, but can avoid it to be removed unexpectedly in packing, transportation or other handling process simultaneously again.And container lip of the present invention also allows to form a reliability and durability vacuum seal structure help keeping block with membrane cover, even can use this container under the pressure differential environment existing, for example in the place of high height above sea level.

With reference to following detailed description, other purpose of the present invention and advantage can become more remarkable.

Summary of drawings

In conjunction with figure, below detailed description meeting easier to understand, wherein:

Fig. 1 is the top plan view of the membrane cover in one embodiment of the invention;

Fig. 2 A is the top plan view of the membrane cover of second embodiment of the invention;

Fig. 2 B is the partial plan layout of the membrane cover of third embodiment of the invention;

Fig. 2 C is the partial plan layout of the membrane cover of four embodiment of the invention;

Fig. 2 D is the partial plan layout of the membrane cover of fifth embodiment of the invention;

Fig. 2 E is the partial plan layout of the membrane cover of sixth embodiment of the invention;

Fig. 2 F is the partial plan layout of the membrane cover of seventh embodiment of the invention;

Fig. 2 G is the partial plan layout of the membrane cover of eighth embodiment of the invention;

Fig. 2 H is the partial plan layout of the membrane cover of ninth embodiment of the invention;

Fig. 3 is the cross section of a pile membrane cover, and wherein each membrane cover comprises that at least one inclined plane part assigns to assist alignment;

Fig. 4 is the front elevation of an exemplary containers of the present invention;

Fig. 5 is the top plan view of container among Fig. 4;

Fig. 5 A is the part sectional view of cutting open along the 5A-5A line among Fig. 5;

Fig. 5 B is the part sectional view of describing the lip configuration of second embodiment;

Fig. 5 C is the part sectional view of describing the lip configuration of the 3rd embodiment;

Fig. 6 is the enlarged view at 6 places among Fig. 4;

Fig. 7 is the enlarged view at 7 places among Fig. 4;

Fig. 7 A is the enlarged view of lip configuration in second embodiment;

Fig. 7 B is the enlarged view of lip configuration in the 3rd embodiment;

Fig. 8 is according to the present invention and the top plan view of the exemplary block that uses together of container;

Fig. 9 is the front elevation on a limit of block shown in Figure 8.

The detailed description of exemplary

The present invention is directed to provides a kind of removable formula capping to allow packing one or more parts (that is, one or more goods), the parts that for example are generally triangular.In one application, one or more snack chips can be packed, in special embodiment, one or more snack chips that are generally triangular can be packed so that the product with minimum breakage rate to be provided to the customer.The present invention estimates that the snack chip of a lot of class kinds can use this structure to pack.For example, have be generally triangular, subcircular, near oval, near rectangle, subquadrate snack chip, or the snack chip of other shape is such as laminar (for example, tortilla, potato chips, vegetables thin slice, fruit thin slice, white lucky cake thin slice), cracker, biscuit, biscuit, candy and similar articles.The chip shapes of above-mentioned each shape can be packed, for example, use to have various difform containers, such as rotund, closely oval-shaped, nearly rectangle, subquadrate, be generally triangular or other shapes of containers.According to principle of the present invention, available exemplary containers by people such as Buisson at U.S. Provisional Application 60/248, open in 340, this application was submitted on November 13rd, 2000, and name is called " a kind of plastic wrapping of improved snack chip " (An ImprovedPlastic Package for Snack Pieces).Other container of making according to the principle of the invention and structure thereof by people such as Buisson at U.S. Provisional Application 60/248, open in 103, this application was submitted on November 13rd, 2000, its number of patent application is _ _ _ _ _ _ _ _ _ _ _, name is called " bottom of container and method " (Container Bottom and Methods), herewith lawyer's number of putting on record of Ti Jiaoing is 8331M, and its whole disclosures all are incorporated herein by reference.Though exemplary configurations of the present invention only is described the application of edible snack chip, but structure of the present invention also is applicable to storage, packs or transports other article, include but not limited to easy the to be cracked goods (that is multiple easy cracked goods) that are deposited in together a plurality of.

Provide the structure of capping can comprise membrane cover, container lip and be particularly useful for the container of packing articles, the goods that for example are generally triangular.Membrane cover of the present invention, container lip and container have obtained improvement, those improvement have made things convenient for packing, reduced the breakage of article in packing, transportation and/or other handling process, when a membrane cover that uses easily and can remove arbitrarily is provided for the user, also help to keep the vacuum leakproofness of container.In a specific embodiment of the present invention, exemplary membrane cover, container lip and container all are generally triangular, and can be used to pack the goods that are generally triangular.In the context of the present invention, " being generally triangular " comprises a common polygonal part in three limits, and wherein each limit is connected to each other in office, bight separately, and the limit comprises acute angle portion and obtuse angle part.In exemplary membrane cover (for example, shown in Figure 1), obtuse angle part bonded assembly is straight flange or straight haply limit.In the present invention, " straight flange " comprises the distance between the angle part, and do not require it is any surface or the profile pattern on limit.

One aspect of the present invention is included as the membrane cover structure that container provides capping.For example, membrane cover has the shape of being generally triangular and matches with the opening that is generally triangular of container.

In exemplary, the film that is generally triangular has three limits and three angle parts, wherein each angle part all by an imaginary line to dividing.Exemplary membrane cover comprises one or more projectioies, and these projectioies stretch out from the periphery that is generally triangular, and the imaginary line of adjacent with it angle part intersects but get along well arbitrarily.The embodiment of membrane cover also comprises the projection of one or more asymmetric settings of imaginary line for the part of adjacent angular with it and the projection that is provided with from the imaginary line substantial symmetry for this angle part of the discontinuous extension of an adjacent angular part.For example, membrane cover can comprise one or more along the interrupted projection of adjacent angular part imaginary line with it.The structure of each exemplary bumps of the present invention is intended to guide a hoisting force, makes the direction of this power towards at least one angle part, and no matter this angle part is on which position of film week edge line.

Provide one or several projection can reduce or prevent that the membrane cover projection is with the mutual interference effect between the inside extension of container lip and/or block with said structure.After a membrane cover is sealed on the container, typically on membrane cover, use a block to protect this membrane cover and/or in case when at least a portion of this membrane cover is removed, can carry out optionally capping to container.The exemplary block that is suitable for the principle of the invention is at U.S. Provisional Application 60/248, open in 089, and submit on November 13rd, 2000, its Application No. is _ _ _ _ _ _ _ _, name is called " block is generally triangular " (Substantially Triangular-Shaped Over-Cap), lawyer's number of putting on record of submitting to is 8329M, and all disclosure is incorporated herein by reference.

Interference effect between any membrane cover projection and the block all trends towards reducing block with bonded assembly reliability between the membrane type sealed container.For example, when using block on the container on a high speed fitting line, the interference effect between membrane cover projection and the block can produce a significant inhibition to it.And after using block, any interference effect between projection and the block all can cause block unexpectedly to come off from container.For example, the above-mentioned interference effect can change when barometric pressure or have problems when the pressure of the extraneous air of the variation that causes container intracavity pressure changes.If external air pressure descends (for example, this thing happens in the area of high height above sea level possibility), container expands in order to respond the chamber pressure that increases, and causes block to come off.

At length with reference to figure, wherein identical sequence number is represented components identical in all views now, and Fig. 1 has described the exemplary arrangement of a membrane cover 10, and it comprises a mean level surface 12 with the periphery 14 that is generally triangular.The periphery of film comprises three limits 16, and wherein at least one limit (for example " 16a ") can be showed by a dotted line.All the dotted line among the figure is represented the shape that is generally triangular of the periphery adjacent with one or more projectioies, and it is not to be used for representing the perforation on the mean level surface 12 or the change of other type.In one embodiment, membrane cover 10 has the periphery of a nearly equilateral triangle, wherein leg-of-mutton limit 16 equal in length or equal substantially.

Membrane cover 10 also comprises

angle part

20a, 20b and 20c, they assign to represent with fillet part in the drawings, but all angled as required more or less, and all there are imaginary line 18a, a 18b and 18c in each angle part, these lines with its

cooresponding angle part

20a, 20b and 20c to dividing.Membrane cover 10 will determine that size and size are used for covering a container that similarly is generally triangular, such as the periphery of a vessel port.In an exemplary, membrane cover 10 can be used to connect near the container lip 54 (seeing Fig. 4 and Fig. 5) that is positioned at container body 52 1 ends.The Design of length on the limit 16 of membrane cover 10 is the periphery that can cover opening, and if possible it can be sealed on the container lip.In exemplary, as shown in Figure 1, the length of side of membrane cover " L " can be about 4 centimetres to about 14 centimetres, such as about 6 centimetres to about 9 centimetres.In some specific exemplary, its length of side " L " is about 7.5 centimetres to about 8.5 centimetres.Yet above-mentioned being for the purpose of illustration only property of length purpose, therefore, according to concrete application, the length of side can have different length.

As shown in Figure 1, membrane cover 10 can comprise one outward extending protruding 24 from its periphery 14, and the adjacent with it angle part 20a of discord and imaginary line 18a and the 18b of 20b intersect.Although do not show, membrane cover can have a plurality of projectioies, for example, can comprise the array configuration of any exemplary bumps described in the application or the associated documents.When the periphery of membrane cover adhered to from the teeth outwards, each membrane cover projection of Miao Shuing had certain size herein, and was guiding a hoisting force in initial just location, made this power towards at least one angle part wherein.

As shown in Figure 1, for example, projection 24 usually stretches out from least one limit 16a of periphery 14, and therefore projection 24 is symmetrically arranged with respect to imaginary line 18a and the 18b right and wrong of adjacent

angular part

20a and 20b with it.Projection can also comprise two

protrusion

26a and 26b, and these two protrusions can be provided with symmetrically along the imaginary line 18c of periphery with respect to the angle part 20c of end.Have dual protrusion and can make things convenient for a left-handed or dexterous people to take, and assist to remove the remainder that removes the later membrane cover that breaks that may be remaining of capping for the first time.In addition, above-mentioned one or more projectioies can comprise one or more protrusions, and protrusion extends out from two or more limits of the membrane cover that is generally triangular, and are that customer's protrusion of taking is provided convenience with the different position at container.And although do not show, projection described herein can be according to the present invention includes the protrusion that three or more extends from periphery.Among 26a and the 26b each can be come easily the surface of membrane cover 10 from container lip or the adhesion of other membrane cover to be removed projection 24 is applied a hoisting force by the customer in hoist point 28a or the grasping of 28b place.

The structure design of projection of the present invention is intended to prevent when removing that when the customer is applying on a hoisting force adheres to membrane cover from it the surface (for example, the antelabium of a container) at least one protrusion of membrane cover film from tearing.In one embodiment, substantially a projection that has covered the lifting region that is limited by two imaginary lines can make hoisting force obtain suitable distribution, and these two imaginary lines extend to a hoist point that is used for firmly grasping membrane cover and applies hoisting force from the point of contact of two adjacent with it angle parts respectively.Hoist point should keep enough distances with the periphery of membrane cover, and the customer is enough to promptly protruding membrane cover be removed from container like this.For example, in exemplary embodiment, the position of hoist point is at least about 4 millimeters apart from the periphery of membrane cover.In other embodiment, the position of hoist point is at least about 8 millimeters apart from the periphery of membrane cover.Under the situation that does not break away from these claims scope, also can use other hoist point distance according to the principle of the invention.

As shown in Figure 1, for example, the first lifting region 34a at least partly or entirely is by periphery 14, the first outer phantom line 30a at point of contact and the first inner imaginary line 32a that extends to the outside point of contact of the second angle part 20b from the first hoist point 28a limit outside the first hoist point 28a extends to of the first angle part 20a.The second lifting region 34b at least partly or entirely be by periphery 14, outside the second hoist point 28b extends to of the second angle part 20b point of contact the second outer phantom line 30b and outside the second hoist point 28b extends to of the second angle part 20b the second inner imaginary line 32b at point of contact limit.Therefore, according to Fig. 1, projection 24 protrusion 26a will be at least substantially or is covered the lifting region 34a that is limited by periphery 14,

straight line

30a and 32a fully, and the protrusion 26b of projection 24 will be at least or covered the lifting region 34b that is limited by peripheral 14, straight line 30b and 32b fully.Therefore, projection 24 size should be able to be substantially or is covered each lifting region of 34a and 34b fully, when initial boot hoisting force during towards at least one adjacent

angular part

20a or 20b, the hoisting force that can in lifting region, distribute, thereby by stress concentration being reduced to the possibility that minimum reduces film breaks.

Projection 24 can also be constructed like this, be that lifting region 34a and 34b limit crossover zone 36 to provide an additional support further to prevent breaking of film, for example, when whole hoisting forcees is applied on the independent protrusion (for example,

protrusion

26a or 26b).Such arrangement makes and removes at the rapid hoisting force that is added on the film of naming a person for a particular job near the middle part of corresponding edge, therefore also just reduced the possibility of not wishing the film breaks that takes place.

Fig. 2 A has showed that has surface 112 and the alternative membrane cover 110 of the periphery 114 that is generally triangular.Periphery 114 comprises limit 116, and wherein at least one limit (for example " 116a ") can represent by a dotted line.Membrane cover 110 also comprises

angle part

120a, 120b and 120c, they respectively by

imaginary line

118a, 118b and 118c to dividing.Exemplary membrane cover 110 comprises a projection 124 that has single protrusion 126.Projection 124 is symmetrically arranged for imaginary line 118a and the 118b right and wrong of angle part 120a and 120b.As mentioned above, include the independent or a plurality of protrusions that (for example, from the limit " 116a ") extends out from a limit in embodiments of the invention, they can be symmetrically arranged along periphery with respect to the imaginary line 118c of terminal angular part 120c.Dual arbitrarily protrusion can be used to disperse a hoisting force and a convenient lefthanded or dexterous people to grasp.

The protrusion of each exemplary of the present invention described in the application can be placed in the position near one of them or another angle part, and protrusion is not symmetrically arranged with respect to any imaginary line like this.

Shown in Fig. 2 A, projection 124 comprises an independent protrusion 126, and its size is suitable for customer's grasping and can applies a hoisting force in 128 pairs of projectioies 124 of a hoist point membrane cover is removed from container lip or other surface of adhering to.The size of membrane cover 110 and structure can prevent to spur protrusion 126 with membrane cover the breaking of film when the surface of container or other adhesion removes as the customer.Can design projection 124 structure makes it can be substantially or cover lifting region 134 reduces film breaks by the direction that changes hoisting force generation fully.Lifting region 134 should be at least partly or entirely by periphery 114, outside hoist point 128 extends to of first angle part 120a the point of contact first imaginary line 130 and outside hoist point 128 extends to of second angle part 120b second imaginary line 132 at point of contact limit.Therefore, projection 124 size should be able to be at least substantially or is covered lifting region 134 fully, during with at least one direction in

respective corners part

120a and 120b of the protruding initial boot hoisting force of box lunch, and its hoisting force that can in lifting region, distribute.

Shown in Fig. 2 A, the outer periphery 127 of protrusion 126 can curve inwardly for another example, and protrusion 126 can go easy material like this.The consumption that reduces material can reduce the expense of flower on material, can also prevent that protrusion from showing do smudgy with lip-deep advertisement of external container or out of Memory simultaneously, and membrane cover also is that will to stick to external container lip-deep.Yet the size of outer periphery 127 should allow protrusion 126 can substantially or be completely covered at least the lifting region 134 that is partly or entirely limited by periphery 114, straight line 130 and straight line 132 at least.

Fig. 2 B comprises the membrane cover 210 of a similar above-mentioned membrane cover 110.In fact, unless otherwise noted, otherwise membrane cover 210 can be identical with membrane cover 110.Yet different with membrane cover 110 is, membrane cover 210 comprises a projection 224 with outer periphery 227, and outer periphery 227 does not have the part that reduces, and does not curve inwardly.In fact, shown in Fig. 2 B, outer periphery 227 has a straight line part, although do not show among the figure, it in addition can be outwardly-bent.The such structure of outer periphery makes part that projection not have a minimizing yet (for example, straight line portion as shown in the figure), but comprised that but the part that can increase (for example, bandy part), thus can increase projection 224 structural strength like this reduces breaking of stress concentration and respective films.

Fig. 2 C to 2H has illustrated several alternate embodiment of a projection, and this projection is from discontinuous extending out of adjacent angular part, with respect to it is symmetrically arranged to the imaginary line that divides this adjacent angular part.When the extension feature of a noncontinuity can't be provided, the projection of a basic symmetry comprised some projectioies with respect to the imaginary line symmetry.From the outer surface level of projection or a section by projection as can be seen, the discontinuous extension of projection is that configuration, structure, composition, interruption or the similar phenomenon owing to interchangeable raised material produces.For example, the weakness zone of a projection can cause discontinuous extension.This weakness zone can comprise a part or the whole bossing of projection, and weakness zone defines some other fitfull things such as hole, eyelet, slit, indentation, cockle, otch, passage.For example, this weakness zone can comprise whole bossing or less than the part of whole projection.Weakness zone of the present invention design after having used block is used for reducing or extend with the mutual interference effect between the container lip inside that prevents to block a shot, simultaneously, after having used block,, bossing also can reduce or prevent that projection from being crumpled when complying with the outer surface of container when bending.

Fig. 2 C has illustrated an exemplary membrane cover 310, and wherein periphery comprises limit 316, and wherein at least one limit (for example " 316a ") can represent by a dotted line.At least one angle part 320 is by 318 pairs of branches of an imaginary line, wherein from the adjacent angular part 320 outward extending protruding 324 of periphery 314 with respect to minute imaginary line of adjacent angular part 320 318 is symmetrically set substantially.Projection 324 comprises an independent protrusion 326, and it provides a hoist point 328 for the customer.Protruding 324 from the 320 discontinuous extensions of adjacent angular part, and comprise that a weakness zone of being made up of bossing, bossing also define one or more holes 338 with closed perimeter 340.Hole 338 can be made amendment and is used for preventing blocking a shot and the mutual interference effect of opening of container between dividing.For example, provide hole 338 or to prevent conveniently block a shot the interconnecting of antelabium 54 of extension 78 of 70 inside and container 50 of projection and the interference effect between block and the antelabium interface by restriction.In fact, hole 338 can be positioned on the projection, and when block 70 was installed on the container 50, inner extension 78 will engage with antelabium 54 by hole 338 at least like this.

Hole 338 makes hole 338 interrupt the projection 324 on the imaginary line 318 along the symmetric position of imaginary line 318.In another embodiment, can come and/or provide a plurality of holes that projection 324 is not interrupted on imaginary line 318 in the position of hole 338 from imaginary line 318 skew.For example, although do not show among the figure, comprise a plurality of symmetrically arranged holes that depart from imaginary line 318 in exemplary, their discord imaginary lines 318 intersect mutually, thereby projection 324 just is not interrupted along imaginary line 318 yet.

Shown in Fig. 2 C, hole 338 can be that one and a half months shape or " D " shape are further to prevent the mutual interference effect between projection 324 and the container 50.The ability that need to strengthen the anti tear of projection 324 is damaged or tears at the less relatively corner 342 of the angle of hole 338 preventing.

Fig. 2 D has described the embodiment of the another kind of membrane cover 410 that is similar to above-mentioned membrane cover 310, as does not have other explanation, and they can be identical.For example, membrane cover 410 also comprises a periphery 414 that is generally triangular with limit 416, wherein has at least the available dotted line in a limit (for example " 416a ") to represent.At least one angle part 420 is by 418 pairs of branches of an imaginary line.Projection 424 stretches out from the periphery 414 of adjacent angle part 420, and it is with respect to being symmetrically arranged substantially to minute imaginary line of adjacent angular part 420 418.Projection 424 comprises at least one protrusion 426, and from the 420 discontinuous extensions of adjacent angular part, it also comprises a weakness zone, and this weakness zone comprises the part of projection, and this defines one or more holes 438 with closed perimeter 440.Yet, different with the membrane cover 310 shown in Fig. 2 C is, the hole 438 of membrane cover 410 comprises a periphery 440 with fillet part 442, and when applying a hoisting force at hoist point 428, it can reduce stress concentration on the film to reduce or to prevent that capping from breaking.

The same with the hole on any one embodiment projection of the present invention, the hole 438 among Fig. 2 D can be to be near-ring shape.If necessary, the hole on any projection can also for nearly oval or other shape prevent to block a shot with the functional characteristic of simplifying manufacture craft or improving hole and container between mutual interference effect.

The same with hole 338, hole 438 makes hole 438 interrupt along the projection on the imaginary line 418 424 along the position that is symmetrical arranged of imaginary line 418.Substitute in the embodiment at it, hole 438 can depart from imaginary line 418 or construct a plurality of holes so that projection is not interrupted on imaginary line 418.For example, although do not show among the figure, exemplary comprises a plurality of imaginary line 418 and mutual symmetrically arranged holes of departing from, and their discord imaginary lines 418 intersect, so projection just is not interrupted on imaginary line 418 yet.

Fig. 2 E is still according to the embodiment that the invention describes another kind of membrane cover 510.If not in addition explanation, membrane cover 510 can be identical with the embodiment described in Fig. 2 C, 2D and this application, includes a projection that has hole.For example, membrane cover 510 comprises a periphery 514 that is generally triangular with limit 516, and wherein the available dotted line at least one limit (for example " 516a ") is represented.At least one angle part 520 is by 518 pairs of branches of an imaginary line.Projection 524 stretches out from the periphery 514 of an adjacent angular part 520, and it is symmetrically arranged substantially with respect to the imaginary line 518 of bipartition angle part 520.Projection 524 comprises at least one protrusion 526, and this protrusion will provide at least one hoist point 528a, 528b.Projection 524 is extended from adjacent angular part 520 noncontinuities ground, and comprises that a weakness zone of being made up of bossing, bossing define one or more holes 538 to make things convenient for above-mentioned block with interconnecting between the container.

The same with hole 438 as above-mentioned hole 338, hole 538 makes hole 538 interrupt along the projection on the imaginary line 518 524 along the position that is symmetrical arranged of imaginary line 518.In an alternative embodiment, hole 538 can depart from imaginary line 518 or provide a plurality of holes not to be interrupted along imaginary line to guarantee projection.For example, although do not show among the figure, exemplary comprises a plurality of imaginary line 518 and mutual symmetrically arranged holes of departing from, and their discord imaginary lines 518 intersect, and therefore projection 524 just is not interrupted on imaginary line 518 yet.

Shown in Fig. 2 E, each hole of describing among hole 538 and the application is the same, comprises an opening 541, and opening 541 provides the hole 538 with open periphery 540.This open periphery allows the same independent peripheral group of membrane cover altogether, and this independent periphery comprises an outermost periphery, rather than the periphery of and the distinct internal holes of most external periphery.Provide one independently the most external periphery can reduce manufacturing step and/or reduce the cost of producing membrane cover.Opening 541 can be a narrow or roomy seam or similar with it slit.In one embodiment, opening 541 extends along the imaginary line of bipartition angle part 520, to guarantee that simultaneously hoisting force can be symmetrically distributed when hoist point 528a and 528b promote protrusion.

Fig. 2 F has described the embodiment of another membrane cover 610 of the present invention.If not explanation in addition, membrane cover 610 can be identical with diagram 2C to 2E and the described membrane cover of other embodiment of the present invention.For example, membrane cover 610 comprises a periphery 614 that is generally triangular with limit 616, and at least one limit in limit 616 (for example " 616a ") can represent with a dotted line.At least one angle part 620 is by 618 pairs of branches of an imaginary line.Projection 624 stretches out from the periphery 614 of an adjacent angular part 620, and it is with respect to being symmetrically arranged substantially to minute imaginary line of adjacent angular part 620 618.Simultaneously, projection 624 is from the 620 discontinuous extensions of adjacent angular part.A weakness zone of projection 624 comprises a scratch part, and its protrusions comprises one or more slits 638.One or more slits can be formed by the otch that runs through whole projection thickness.In other embodiments, slit can form the otch that only passes protruding a part of thickness.

The position that is symmetrical arranged of the slit 638 on the imaginary line 618 makes projection 624 be interrupted on imaginary line 618.In an alternative embodiment, slit 638 can depart from imaginary line 618 or provide a plurality of slits to allow projection 624 not be interrupted on imaginary line 618.For example, although do not show among the figure, exemplary comprises a plurality of imaginary line 618 and symmetrically arranged slits of departing from, and their discord imaginary lines 618 intersect, and therefore projection 624 just is not interrupted on imaginary line 618 yet.

One or more slits 638 can be made different shape, for example waveform, sinusoidal, arc and other shape.In addition, can provide a plurality of slits further to weaken projection.Shown in Fig. 2 F, a slit can be intersected by a plurality of cross one another slits.That bigger arcuate slots should and extend the inside of block and antelabium between contact area be complementary to reduce or to prevent mutual interference effect between them.Can construct an independent slit rather than a plurality of slit and weaken projection, thereby reduce interference effect, but it can not be impaired to its degree of tearing or breaking easily when giving hoisting force of projection simultaneously.In an alternative embodiment, can provide a plurality of slits to come further the interference effect of weakness zone is dropped to minimum.In one embodiment, slit can form right-angled crossing (that is two cross one another slits).

When reducing manufacturing cost, slit 638 can be very narrow (shown in Fig. 2 F) or wide slightly strengthen that it is functional.A very thin kerf slots is than a wide slightly slit or the easier making of groove, and can prevent the accumulation of scrappy material.Yet wide slightly slit or groove can further reduce interference effect each other.A wide slit can be ditch shape (that is, wherein slit is not through the whole thickness of membrane cover) or open groove (that is, slit is through the whole thickness of membrane cover).

Fig. 2 G shows the embodiment of another membrane cover 710 of the present invention.If there is not other explanation, membrane cover 710 can be identical with diagram 2C to 2F and the described membrane cover of other embodiment of the present invention.For example, membrane cover 710 comprises a triangular perimeter 714 with limit 716, and wherein the available dotted line at least one limit (for example " 716a ") is represented.At least one angle part 720 is by 718 pairs of branches of an imaginary line.Projection 724 stretches out from the periphery 714 of an adjacent angular part 720, and it is with respect to the imaginary line 718 of adjacent angular part 720 is symmetrically arranged substantially to dividing with it.This projection 724 is 720 discontinuous extensions from the angle part.A weakness zone on the projection 724 comprises a scratch part, and wherein this projection comprises a plurality of perforation or slit 738.These one or more perforation or slit can be tiny perforation or otch, and they are through the part or all of thickness of projection.

Perforation or slit 738 can be symmetrically arranged for imaginary line 718, and be also can right and wrong symmetrically arranged.In one embodiment, one or more slits and imaginary line intersect, and have therefore caused projection 724 to be interrupted on imaginary line 718.In an alternative embodiment, each perforation or otch 738 can depart from imaginary line 718, and projection 724 just is not interrupted on imaginary line 718 yet like this.For example, although not expression among the figure, exemplary embodiment comprises a plurality of perforation or slit 738, and they are symmetrically arranged with respect to imaginary line 718 substantially, and gets along well that it intersects, and therefore projection 724 just is not interrupted on imaginary line 718 yet.

Perforation or otch 738 can be settled along projection 724 in a variety of forms.In one embodiment, perforation or otch 738 with arc mode settle be complementary substantially from 70 the inside extendible portion 78 of blocking a shot, also will block a shot simultaneously and container lip between interference effect drop to minimum.

Fig. 2 H shows the embodiment of another membrane cover 810 of the present invention.If not explanation in addition, membrane cover 810 can be identical with diagram 2C to 2G and the described membrane cover of other embodiment of the present invention.For example, membrane cover 810 comprises a periphery 814 that is generally triangular with limit 816, and wherein the available dotted line at least one limit (for example " 816a ") is represented.At least one angle part 820 is by 818 pairs of branches of an imaginary line.Projection 824 stretches out from the periphery 814 of an adjacent with it angle part 820, and it is with respect to being symmetrically arranged substantially to the imaginary line 818 that divides this adjacent angular part 820.Projection 824 is from these adjacent angular part 820 discontinuous extensions.A weakness zone on the projection 824 comprises a scratch part, and its protrusions comprises one or more gauffers 838.

Gauffer 838 can be symmetrically arranged with respect to imaginary line 818, and is also can right and wrong symmetrically arranged.In one embodiment, one or more gauffers and imaginary line 818 intersect mutually and have caused the interruption of projection 824 on imaginary line 818.In its embodiment that substitutes, each gauffer 838 can depart from imaginary line 818, and like this projection 824 is not just interrupted on imaginary line 818.For example, although do not show among the figure, comprise a plurality of gauffers that depart from imaginary line 818 in the exemplary, their discord imaginary lines 818 intersect, and therefore projection 824 is not interrupted on imaginary line 818.

Gauffer 838 can be settled in a variety of forms along projection 824.In one embodiment, gauffer 838 is settled to extend 78 with block 70 inside in arc mode and is complementary substantially, therefore reduce to block a shot and container lip between mutual interference effect.

Above-mentioned embodiment in fact all is exemplary, and it can also comprise that other meets the embodiment of the principle of the invention.For example, any combination of above-mentioned feature or their equivalent can be combined into discontinuous extension mutually.In addition, when the discontinuous partial sum of above-mentioned exemplary when the symmetrically arranged projection of imaginary line of adjacent angular part is associated with it, projection also can the peripheral discontinuous extension from other embodiment further limits or prevents that bossing from producing mutual interference effect with the connecting bridge of block and antelabium.For example, this projection can be from the discontinuous extension of periphery, and it is symmetrically arranged with respect to the imaginary line right and wrong of any part of adjacent angular with it simultaneously.In addition, the exemplary membrane cover of the present invention can comprise described projection of a plurality of the application or its equivalent (for example, one or more projectioies shown in Fig. 1,2A to 2E and 3).

Above-mentioned any one comprise in the embodiment of the projection that has a plurality of protrusions, protrusion can connect together with film portion, this film portion has a periphery that has the outer periphery of curved periphery or do not have wedge angle, otherwise it is bound to breaking of film produced potential focal point of stress.

As mentioned above, a projection that has a plurality of protrusions can assist a lefthanded or dexterous people that membrane cover is removed from container.If removing the process of membrane cover from container, membrane cover breaks, and so extra protrusion can be assisted equally with residual thin film removing.For example, first protrusion can promptly be come mobile capping.After having applied a hoisting force, film may unexpectedly be torn into two parts, and wherein only some is removed by the customer.Second protrusion can be used for removing the remainder of capping so.

In addition, preferably above-mentioned membrane cover also will reduce the consumption of material with expense that reduces material and the size that reduces protruding overhang as far as possible as far as possible, otherwise it can the very male display surface part that maybe can cover container of seeing.The amount of the pendle around the remainder of capping or unnecessary membraneous material will typically be certain proportion with the function that removes of membrane cover, and they will pass a seal point on the container lip.The variation surplus of pendle can be from 0 millimeter, this moment strip of paper used for sealing just in time on the edge of membrane cover, in other embodiments, it can extend to 3 millimeters from the strip of paper used for sealing between container and the membrane cover.In another embodiment, the pendle that passes the membrane cover of sealing band is about 0 millimeter to about 1 millimeter, or is about 0 millimeter to about 0.5 millimeter in other exemplary.In another embodiment, this pendle can be wrapped in advance antelabium below, membrane cover is applied to this antelabium.

This membrane cover can be used multiple material.Membrane cover can be made up of the single or multiple lift material.The representative type multilayer material has the anti-oxidation and damp-proof material of one deck at least, paillon foil for example, and one deck is sealed in the leakproofing material of container lip, and for example a kind of thermoplastic polymer is formed.This layer leakproofing material can be that a continuous or discrete layer of coating (for example coating) seals suitable surface.For example, before sealing, leakproofing material can be on film or container lip be used for reducing the consumption of leakproofing material as discontinuous layer, therefore avoids the excess waste of untapped material still.In other was used, it is replaced the continuous material of a monoblock as a pantostrat also was desirable with the composition of simplifying membrane cover.

In one embodiment, membrane cover is made of layer laminates, and laminated material wherein is that the paper tinsel layer of about 0.0015 inch (0.0381 millimeter) and ethylene vinyl acetate that a layer thickness is about 0.00125 inch (0.03175 millimeter) are formed by one deck acrylic primer, a layer thickness.If desired, adhesive phase can be placed between paper tinsel layer and the ethylene vinyl acetate layer.Under the situation of not running counter to the principle of the invention, the membrane type structure of capping herein also can be used for other membraneous material.

Fig. 3 shows a pile membrane cover 1000, and wherein each membrane cover 1010 comprises that at least a chamfered portion 1011 is used for assisting stacking and the alignment of membrane cover before using.For example, one 6.4 millimeters horizontal throw " b1 " can be arranged, its inclined-plane end offset " b2 " is about 1.5 millimeters.Therefore, each embodiment described herein all comprises a stacking and an alignment that has the membrane cover of a chamfered portion with convenient a plurality of membrane covers at least.In addition, this chamfered portion can be on the projection of membrane cover or in other zone, and in additional embodiment, it can extend to the periphery of whole membrane cover.

Membrane cover of the present invention can use various attachment technique to be applied in container and on the opening of container.In exemplary embodiment, membrane cover is to adopt heat-sealing method to stick on the container.In one embodiment, membrane cover can adopt a packing element to stick on the container more than Fahrenheit 300 degree (149 degree Celsius), for example, keep temperature to spend (232 degree Celsius) a period of time, utilize enough pressure that it is sealed on the container lip from about Fahrenheit 350 degree (177 degree Celsius) to about Fahrenheit 450.In one embodiment, packing element acts on membrane cover 0.5 second to 1 second, and it is applied one about 80 pressure to about 100 pounds/sq in.When making a removable formula capping, adopt corresponding sealing method and structure, produces a leak free container, wherein this membrane cover will can make the customer apply a little hoisting force to the acceptable degree just it can be removed from container.

Fig. 4 shows a container that can use together with the membrane cover of manufacturing of the present invention.A suitable containers is open in people's such as Buisson U.S. Provisional Application 60/248,340, is filed on November 13rd, 2000, and exercise question is " a kind of plastic wrapping of improved snack chip ", and its lawyer's number of putting on record is 8332P.As submit on November 13rd, 2000 people's such as Buisson U.S. Provisional Application 60/248,103 with in the same period submit to exercise question be " container bottom and method ", lawyer's number of putting on record be the people such as Buisson of 8331M U. S. application _ _ _ _ _ _ _ _ _ _ in disclosed the same, this container can optionally comprise a container and a container bottom.

Shown in Figure 4 and 5, container 50 comprises a leg-of-mutton container body 52 and one and the contiguous outward extending antelabium 54 in main body 52 upper ends.Fig. 5 is a top plan view of container 50, and it has illustrated that antelabium 54 and container body 52 all have a triangle horizontal profile.

People wish to construct a container that has opening, and this opening just in time is fit to an above-mentioned membrane cover, can make container that good leak tightness is arranged in the removable formula capping that customer of manufacturing arbitrarily removes easily then.Expect a better seal effect, generally need between membrane cover and vessel port, have higher pressure, temperature and/or adhesive bonding property and reach suitable air-proof condition so that enough sealing force to be provided.Yet, improve sealing force and cause the bigger strength of consumer wants that membrane cover is removed.In addition, when exerting pressure, the customer attempts to open sealing or when container removed membrane cover, unsuitable sealing force also may cause film to be torn.Therefore, producing a leakproofing material that can reach air-proof condition and user grasps use and membrane cover that can be easy to remove in needs is desirable easily.

As mentioned above, in seal process, sealing force is normally decided by the effect of pressure, temperature and adhesives.The intrinsic characteristic of a noncircular vessel antelabium shape may cause uneven perpendicular rigid.Uneven rigidity generally can produce different antagonistic forces by the diverse location around antelabium.In order to guarantee all have enough leak tightnesss in all positions of antelabium, the strength that applies that must increase membrane cover reaches minimum requirements with the antagonistic force that all positions at antelabium produce.Therefore, the zone with minimum rigidity will reach minimum antagonistic force in order to reach necessary leak tightness, yet the point that has higher antagonistic force on the antelabium has produced an excessive sealing force, and this makes that the customer is difficult to overcome.

In order to reach one in the leak tightness that requires within the strength scope, producing a vessel port with the strength of immobilizing, therefore to avoid occurring the excessive sealing area of sealing force be useful.Therefore, in seal process, be pressed onto membrane cover on the container in, people wish along antelabium each the point on have uniform antagonistic force.Antagonistic force can allow enough sealing strength to satisfy MIN seal request under the situation that is not difficult to that overcome, unnecessary strong sealing area uniformly.

The bulge structure that has a circular horizontal profile has a uniform antelabium, when being sealed in a membrane cover on the container, produces a uniform antagonistic force on its container lip.Therefore, when applying a sealing force and being added in a membrane cover on traditional bulge, on having point of contact, the institute between container lip and the membrane cover all can produce a changeless antagonistic force.Yet the container lip with the section that is generally triangular is to produce a fixing uniform antagonistic force when being added to membrane cover on the container lip.And, by membrane cover being applied a sealing force it is sealed in meeting uneven antagonistic force of generation on the difference of container lip on the container lip that is generally triangular, and between container lip and membrane cover, also can produces different sealing dynamics.Typically, a triangular shaped container is originally big in the perpendicular rigid intensity of perpendicular rigid intensity ratio on the limit between the angle part of angle part, and therefore, when sealing force was added on the membrane cover, the limit of container was than having more elasticity in the angle part.Therefore, in view of the intrinsic characteristic of antelabium itself that is generally triangular, an antagonistic force that is added in the high slightly sealing force generation in angle part is bigger than the antagonistic force on the limit that is added between each angle part.For the sealing intensity that guarantees on the limit, to reach enough, must on membrane cover, apply bigger strength, it also can make in angle part generation unnecessary antagonistic force and corresponding unnecessary sealing force.The sealing force that the angle part increases makes the customer be difficult to overcome when attempting to remove membrane cover, but also may cause membrane cover to break.

According to principle of the present invention, the structure on the limit that the container lip that is generally triangular has is different with the structure of angle part, and the limit structure of antelabium is wanted to increase its relative rigidity with respect to the angle part.In fact, their different structures reduce or have prevented the difference of angle part with the perpendicular rigid between the limit, so also just make a sealing force can produce a stable unmodified antagonistic force.Therefore, according to principle of the present invention, a membrane cover can be by being sealed on the antelabium that is generally triangular in a basic fixed unmodified sealing force in the vessel port.

For example, Fig. 5,5A, 6 and 7 have illustrated the exemplary arrangement of a container 50, it comprises an antelabium 54, the opening adjacency of this antelabium 54 and a container body 52, wherein in order to increase the relative rigidity of limit 58 with respect to angle part 56, the structure on the limit 58 of antelabium 54 is different with the structure of its angle part 56.In fact, the difference of structure makes and can produce a basic uniform antagonistic force when on the antelabium 54 that a membrane cover is added to container 50 on antelabium between limit 58 and the angle part 56.

Fig. 6 is the enlarged side view at 6 places of the exemplary angular part 56 of antelabium 54 among Fig. 4, and Fig. 7 is the enlarged side view at 7 places of the side 58 of antelabium 54 among Fig. 4.In addition, Fig. 5 A shows the angle part 56 of antelabium 54 and a cross section view of side 58.Antelabium 54 has 62,63 and bottom surfaces 64 of 60, one outside walls of an end face.In addition, the outside wall 62 of angle part 56 have nearly " U " shape with rounded vertex 68, to the type structure of outer lug.This type structure provides basic structural integrity to accept membrane cover for angle part 56.On the contrary, compare with the outside wall 62 of " U " shape of antelabium angle part 56, the structure of the side with a smooth outside wall 63 58 of antelabium 54 is different with it.Under this configuration, keep having uniform vertical dimension H1 between the end face 60 of antelabium 54 and its bottom surface 64, also can obtain the angle part that people wish and the rigidity of side.As shown in Figure 7, although the outside wall 62 of substantially flat may have a less curvature, and " U " shape profile phase ratio of the outside wall 62 of angle part 56, outside wall 63 is smooth basically.Repair outside wall 63 make its be substantially flat rather than make it to have " U " shape profile, can increase the relative rigidity of limit 58 like this with respect to angle part 56.Therefore, the smooth outside wall 63 on outside wall 62 of " U " shape of angle part 56 and limit 58 constituted the container lip 54 that is generally triangular, the antelabium of the be generally triangular container the same with the limit part-structure with angle part is compared, when a membrane cover is added in it above the time, it can produce a basic antagonistic force uniformly.

Because the lip configuration that the outstanding length very on a large scale can obtain wishing, Fig. 6 shows that the outstanding length L 1 that surpasses container body of antelabium of the container body of an embodiment can be about 0.03 to about 0.10 inch (0.762 to 2.54 millimeter).In a special embodiment, L1 is about 0.08 inch (2.032 millimeters).According to Fig. 7, the length L 2 outstanding from the antelabium of container body can be about 0.01 inch to about 0.10 inch (0.254 to 2.54 millimeter).In a special embodiment, L2 is about 0.06 inch (1.542 millimeters).

Container can have multiple lip configuration, and when being added to membrane cover in the vessel port, antelabium should have a basic antagonistic force uniformly.Fig. 5 B and 7A show the alternate embodiment of a container lip 154, and it is consistent with the other exemplary of the present invention.Shown in Fig. 5 B, the structure of angle part 156 and Fig. 5 A are similar with 6 angle part 56, also can be identical.Container lip 154 comprises an end face 160, a bottom surface 164 and an outside wall 162, and outside wall has a protruding configuration with outside nearly " U " shape of rounded vertex 168.According to Fig. 5 B and 7A, container lip 154 also comprises limit 158 and angle part 156, and their structure is different, and this is in order to increase the relative rigidity of limit 158 with respect to angle part 156.There is the outside wall 163 that is " W " shape of an outside protrusion on exemplary limit 158, and wherein the apex region 167 on " W " shape plane 163 is gone out from the container Subject Extension, and is positioned on the opposite side that falls in core 169.There is a horizontal breadth T1 on " W " shape limit 158 in apex region 167, and its thickness is greater than the horizontal breadth T3 of the core 169 that falls in or the horizontal breadth T2 of angle part 156.The like this big horizontal antelabium thickness of apex region 167 can utilize the limit of air blast method of molding structure " W " shape to obtain.Shown in Fig. 5 B and 7A, have the container lip 154 on " W " shape limit 158, wherein limit 158 is at the horizontal breadth T of the enhancing of apex region 167 ₁Strengthened the relative rigidity of limit 158 with respect to the angle part, therefore, the antelabium of the triangular shaped container the same with the limit structure with angle part is compared, when a membrane cover is added in it above the time, it has a basic antagonistic force uniformly.And shown in the embodiment of Fig. 7, the behavior of structure of antelabium 154 can have the same vertical height by the wall that makes angle part and limit and be achieved between end face 160 and bottom surface 164.

Fig. 5 C and 7B show the additional embodiment of a container lip 254, it comprises the angle part 256 with an outside wall 262, this outside wall 262 has nearly " U " shape configuration that has rounded vertex 268, it also comprises the limit 258 that has an outside wall 263 equally, and this outside wall 263 has and outside wall 262 similar or identical rounded vertex 267.Fig. 5 C further illustrates the horizontal antelabium thickness T on limit 258 ₁Horizontal breadth T greater than angle part 256 ₂This is in order to increase the relative rigidity of limit 258 with respect to angle part 256, therefore, and when on the antelabium that a membrane cover is added to container, the antelabium of the be generally triangular container identical with the limit structure with angle part is compared, and it can have a basic antagonistic force uniformly.In addition, shown in the embodiment of Fig. 7 and 7A, the behavior of structure of antelabium 254 can have identical vertical dimension by the wall with angle part and limit and be achieved between end face 260 and bottom surface 264.

Above-mentioned embodiment all is exemplary.In addition,, can produce a basic antagonistic force uniformly on the limit, can also have other structural difference between limit so in the present invention and the angle part as long as when on the antelabium of container, using a membrane cover.And, with respect to when on the antelabium of an even structure, using a membrane cover, on angle part and limit, producing different antagonistic forces, herein " uniform substantially " comprised antagonistic force on angle part and the limit evenly.Therefore, one " basic pressure uniformly " can comprise different pressure, but more even its antagonistic force on angle part with basic identical lip configuration and limit.

In addition, can be by making up the required rigidity that above-mentioned embodiment obtains limit and angle part.For example, the profile of horizontal breadth of antelabium (shown in Fig. 5 C) and outside wall (as Fig. 5 A with shown in the 5B) is the same can be different.

In the exemplary embodiment of lip configuration, the end face of antelabium can be from the top of outside wall or with an angle horizontal-extending relative and horizontal direction makes progress.Therefore, angle " c " (as Fig. 6,7,7A and 7B) can be about 0 degree to about 20 degree, for example be about 5 degree to about 18 degree, be that about 8 degree extremely about 12 are spent in one embodiment.By level or with an angular arrangement end face greater than 0 degree, when membrane cover of use, container lip has shown the motion of spring-like, but also can provide the counteragent of a membrane type sealed power to make membrane cover reach a better sealing effectiveness.The angle that makes progress of end face can also can produce a basic antagonistic force uniformly along antelabium when using film, and can alleviate because the caused imperfection influence of trimming deburring, seam line and similar operation.Although graphic end face is to make progress with inside, it also can make progress or stretch out.

In one embodiment, can be by the end face that uses can make end face angle " c " on the antelabium limit obtain a basic homogeneous angular greater than the model of the end face angle " c " of antelabium angle part.For example, a model can be configured to, and the end face angle " c " on limit horizontal surface relatively is 15 degree, and the end face angle " c " of angle part horizontal surface relatively is 20 degree.

Because above-mentioned membrane cover and lip configuration all are useful separately, therefore, they can unite use.For example, any membrane cover described here can be used in combination with the antelabium of arbitrary structures, membrane cover can arbitrarily be removed by the customer like this, and can produce basic antagonistic force uniformly on the membrane cover of antelabium periphery to reach and to keep good sealing effectiveness.The sealing layer that above-mentioned membrane cover produces can be prevented oxidation and protection against the tide effectively.

Container 50 of the present invention can utilize diverse ways to constitute.For example, although can use other production method, container 50 can be formed by thermoplastic material, and can blowing form.Suitable thermoplastic material comprises polyolefin, for example polyethylene and polypropylene, and polyvinyl, for example ethyl vinyl alcohol and similarly material, but it is not limited in the middle of these several materials.These materials can be single layer, and some can also be combined.For example, a multilayer material can comprise a polyolefin layer and an ethyl vinyl alcohol layer.In a specific embodiment, container 50 is formed by a multilayer material blowing, and this multilayer material comprises an ethyl vinyl alcohol interlayer that is clipped between two hdpe layers (HDPE).

In the embodiment of a special blow moulding, the multilayer plasticity structure of container is as follows: a pure polyolefin layer, a laminated film tack coat, an ethyl vinyl alcohol layer, another laminated film tack coat and another pure polyolefin layer.Typically, container 50 also has one or more layers break-in material between laminated film tack coat and pure polyolefin layer.The thickness of ethyl vinyl alcohol layer generally is not less than 0.00005 inch (0.00127 millimeter), also be no more than 0.006 inch (0.1524 millimeter), for example, be no less than 0.00005 inch (0.00127 millimeter), and be no more than 0.003 inch (0.0762 millimeter), in other example, be no less than 0.0001 inch (0.00254 millimeter), be no more than 0.0012 inch (0.03048 millimeter).

In one even the more special example, the multilayer plastic structure comprises six layers of structure, comprising with lower floor (from the skin to the internal layer): about 9.31 grams or about 19.4% high-density polyethylene layer by weight; About 18.91 grams or about 39.4% plant break-in layer and high-density polyethylene layer by weight; About 0.62 gram or about 1.3% composite tie layer by weight; About 2.02 grams or about 4.2% ethyl vinyl alcohol layer by weight; About 0.62 gram or about 1.3% composite tie layer by weight; With about 16.51 grams or about 34.4% plant break-in layer and high-density polyethylene layer by weight.

In another six layers of example of structure, it comprises (from the skin to the internal layer): about 10.7 grams or about 19.4% high-density polyethylene layer by weight; About 21.66 grams or about 39.4% plant break-in and high-density polyethylene layer by weight; About 0.69 gram or about 1.3% composite tie layer by weight; About 2.33 grams or about 4.2% ethyl vinyl alcohol layer by weight; About 0.69 gram or about 1.3% composite tie layer by weight; With about 18.94 grams or about 34.4% plant break-in and high-density polyethylene layer by weight.

Yet six layers of structure in another example can comprise (from the skin to the internal layer): about 15.0% by weight high density ethylene (HDEP) homopolymer and dye coating; About 63.3% by weight plant break-in (accounting for 60% by weight) and high density polyethylene (HDPE) homopolymer and dyestuff (accounting for 40% by weight) layer; About 1.4% by weight composite tie layer; About 3.6% by weight ethyl vinyl alcohol layer; About 1.4% by weight composite tie layer; With about 15.0% by weight plant break-in and high density polyethylene (HDPE) homopolymer and dye coating.

The thickness of representative type container is about 0.005 inch to about 0.055 inch (0.127 to 1.397 millimeter), for example about 0.010 inch to about 0.045 inch (0.254 to 1.143 millimeter).Inclusion body 52 and antelabium 54 are moulding integrally, for example, and by a blow molding method moulding.Be that lip configuration described herein is self-support type at the downside of its end face easily.Therefore, lip configuration can be constructed by blow moulding, and can overcome many in order to use film to need the shortcoming of the conventional antelabium of mechanical upholder.

In another embodiment of container of the present invention, container can also comprise a block 70, and Fig. 8 and Fig. 9 show an example sample.For example, it is the people's such as Buisson of " triangle block " U.S. Provisional Application 60/248 that block 70 can be included in the exercise question that is filed on November 13rd, 2000, in 089, be also included within simultaneously the exercise question submitted to for " triangle block ", lawyer's number of putting on record for the people's such as Buisson of 8329M U. S. application _ _ _ _ _ _ _ _ _ block of the inside description, foregoing is incorporated herein by reference.

Exemplary block 70 among Fig. 8 and Fig. 9 comprises be generally triangular an end face 72 and a shirt rim 74 of extending from the periphery 76 of end face 72 downwards.It can also be seen that in Fig. 8 and Fig. 9 shirt rim 74 comprises basic straight basically limit of extending for circular angle part with around the periphery 76 of end face 72.The angle part of shirt rim comprises inner extension 78, and the limit of shirt rim does not comprise inner the extension.Described herein " not having inner the extension substantially " comprises that this situation, the limit of shirt rim have only the inside of enough little percentum to extend, and like this, when the bottom surface at block applied an outside pressure, the inside of angle part was extended and moved inward and can not be obstructed.In one embodiment, the limit of shirt rim does not comprise inner the extension.The shirt rim comprises having inner angle part of extending and do not have inner limit, shirt rim of extending, and it makes block can stick to safely on the antelabium 54 of container described herein 50, and can prevent the internal edges of such container and the pressure difference between the external edge.Be that this structure also allows the customer will block a shot at an easy rate in needs to remove from such container easily.

Specific embodiment set forth above and embodiment have been illustrative effect, are not the scope of having a mind to limit following claims.The present invention other embodiment and the advantage of bringing thus be clearly for ordinary skill professional in this area, and in the scope of claims.

Claims

1. membrane cover, it comprises:

A) surface, it comprises a periphery that is generally triangular, this periphery that is generally triangular has first, second, third angle part, it is characterized in that each angle part by an imaginary line to dividing;

B) projection, it comprises a protrusion, this projection initially is used for guiding a hoisting force, make this power towards at least one angle part, it is characterized in that, this projection or stretch out from periphery, the imaginary line right and wrong of adjacent angular part are symmetrically arranged with it with respect to any one like this; Or since a discontinuous extension in adjacent with it angle part, the imaginary line with respect to this adjacent angular part is symmetrically arranged like this.

2. membrane cover as claimed in claim 1 is characterized in that above-mentioned projection stretches out from periphery, like this should projection for the imaginary line of any adjacent with it angle part right and wrong symmetrically arranged; Preferably but not necessarily, its feature further is: (i) this projection comprises a hoist point and a lifting region, this lifting region is limited by first and second imaginary lines, first imaginary line is the point of contact outside hoist point extends to of first angle part, second imaginary line is the point of contact outside hoist point extends to of second angle part, it is characterized in that this bossing has covered lifting region substantially; (ii) this projection comprises first hoist point and second hoist point and first lifting region and second lifting region, first lifting region by the first outer phantom line that extends to point of contact outside of first angle part from first hoist point and outside first hoist point extends to of second angle part first inner imaginary line at point of contact limit, second lifting region by the second outer phantom line that extends to point of contact outside of second angle part from second hoist point and outside second hoist point extends to of first angle part second inner imaginary line at point of contact limit, and it is characterized in that this projection has covered first and second lifting region substantially.

3. membrane cover as claimed in claim 1 it is characterized in that this projection since a discontinuous extension in adjacent with it angle part, and its imaginary line with respect to adjacent angle part is symmetrically arranged substantially.

4. membrane cover as claimed in claim 3 is characterized in that this projection comprises a weakness zone; Preferably, this weakness zone comprises the bossing that limits a hole; Preferably, this hole has the periphery of an opening; And preferably, this bossing combines with hole and limits a slit so that open periphery to be provided.

5. membrane cover as claimed in claim 4 is characterized in that above-mentioned weakness zone comprises the bossing that limits a hole, and this hole has an osed top periphery; Preferably but not necessarily, this hole by one in the above-mentioned imaginary line to dividing.

6. membrane cover as claimed in claim 4 is characterized in that above-mentioned weakness zone comprises a part that quilt is delineated of above-mentioned projection.

7. membrane cover as claimed in claim 6 is characterized in that above-mentioned projection is by crumpling, punch or cutting and delineated.

8. membrane cover as claimed in claim 7 is characterized in that above-mentioned projection delineates by cutting, so this otch should extend through the thickness of projection partially or completely.

9. as each described membrane cover in the claim 1 to 8, it is characterized in that above-mentioned periphery is equilateral triangle substantially.

10. as each described membrane cover in the claim 1 to 9, it is characterized in that this membrane cover is formed by a paper tinsel layer and a polymeric layer at least; Preferably, this membrane cover is to be formed by the layer laminates that comprises acrylic primer layer, paper tinsel layer and ethylene-vinyl acetate layer sealing layer.

11. as each described membrane cover in the claim 1 to 10, it is characterized in that above-mentioned projection stretches out from periphery, but do not have to intersect with the imaginary line of any part of adjacent angular with it.

12., it is characterized in that above-mentioned protrusion comprises a plurality of protrusions as each described membrane cover in the claim 1 to 11.

13., it is characterized in that above-mentioned projection comprises a plurality of projectioies as each described membrane cover in the claim 1 to 12.

14. container, it comprises an antelabium, this antelabium has the horizontal profile that is generally triangular, this antelabium comprises three angle parts and three limits, the structure that it is characterized in that the structure on limit of above-mentioned antelabium and angle part is different, this is in order to increase the relative rigidity of above-mentioned limit relative angle part, so that on the antelabium that a membrane cover is applied in container the time, can produce a basic reaction pressure uniformly.

15. container as claimed in claim 14 is characterized in that above-mentioned antelabium comprises an end face, an outer wall surface and a bottom surface, the angle part of above-mentioned antelabium has an exterior wall surface that is " U " shape substantially of outwards protruding.

16. container as claimed in claim 14, the above-mentioned limit that it is characterized in that above-mentioned antelabium have an outside wall that outwards protrudes, and this outside wall substantially flat, are " U " shape substantially or are " W " shape substantially.

17. container as claimed in claim 14 is characterized in that also comprising a membrane cover, it comprises:

A) surface, this surface comprise having periphery first, second, third angle part, that be generally triangular, it is characterized in that each angle part by an imaginary line to dividing;

B) projection, this projection comprises a protrusion, and this projection initially is used for guiding a hoisting force, makes this power towards at least one angle part, this projection or stretch out from periphery, the imaginary line right and wrong of adjacent angular part are symmetrically arranged with it with respect to any one like this; Or from a discontinuous extension in adjacent with it angle part, the imaginary line with respect to this adjacent angular part is symmetrically arranged like this.