CN88200750U - Packing bag with non-symmetrical stress concentration projecture - Google Patents

Abstract

The utility model discloses a packaging bag used for packaging flowing articles, comprising a hardish plate; a flexible layer is fixed on one side of the plate to form a flexibility bag. A faultage line is carved on the plate before hand and an outward protuberant non-symmetrical stress concentration projecture on the faultage line is arranged on the plate; the projecture is better to be half a non-symmetrical approximately pyramid shape. The plate is bended to be a V-shaped along the faultage line in order to make the faultage line start to break off along a protuberant part, forming at least one outlet supplied for the flowing articles to flow out. The plate can also be fixed with two or more than two independent and adjacent flexibility bags and are provided with at least two stress concentration projectures.

Description

Packing bag with non-symmetrical stress concentration projecture

The utility model is the packaging bag that is used to pack distribution flowable products or similar substance about a kind of, especially about new model and its structure of the area of stress concentration that is used for packaging bag, this packaging bag needing to be generally used for using separately and can to pack and distribute flowable products.

Up to the present, people for can be used to pack flowable products and usually needs use the packaging bag that also can distribute flowable mass to do various trials separately.

The patent the 3rd that U.S. Randt covers, 986, No. 640 (below be designated as patent No. 640) disclose a kind of structure more in the past bigger improved packaging structure, this improvement is that it has a manual activity and is used for dividing effectively the material that issues constant volume, the difficulty that it ran into when not opening in the past: remove lid or tear packaging bag as needs.

The U.S. Randt people's patent such as covers and has showed No. 640 similar packaging bags of patent a kind of and that the Randt covers for the 4th, 493, No. 574, is the stress concentration thrust that is positioned on hard dull and stereotyped at least one position of outside dislocation line or tomography type but its uses.Have one among the embodiment of this thrust and be similar to pyramid and splitting on the fault plane by the summit, the vertical two side portions of its dislocation line both sides and line of centers or dislocation line substantially all is symmetrical.

Though above-mentioned No. 574 patents structurally have really than No. 640 patents and the more significant improvement of all known package bags, have now found that and use in some cases substantially that the stress concentration thrust of symmetric shape has some shortcoming.

It is found that: (i) symmetrical thrust relative height; The (ii) (iv) angle between the two symmetrical sidewalls of the vertical line of stress concentration thrust dislocation line of the (iii) needed opening size of the thickness of sheet material, be to be mutually related between these factors, such as required opening size increases, then the height of thrust must increase, the thrust wall thickness will attenuation, and above-mentioned angle also can diminish.Therefore, because it is big that the size of required opening becomes, the thickness of sheet material must increase so that have enough bracketings firmly to flow out the thickness of material along the wall thickness of dislocation line, especially on cusp, though have enough intensity to be crushed, when hard flat board is bent to " V " font, can break so that flow of material comes out to be unlikely.When required A/F increases if only reduce the thrust height simply is not always feasible, because have now found that thrust is too shallow as under given width, thrust will flatten, thereby lose the ability of stress concentration, cause impassabitity to bend to " V " font and it is broken.

Because opening size increases and the thrust height is increased, another shortcoming of doing like this is that container can not closely be stacked, thereby makes troubles for storage and transportation.

Having some products must independently to deposit before use, have only in use and just mixed, as epoxy resin composition and materia dentica and some other materials, all is just to mix syntheticly in use, then independently deposits at ordinary times.Cold dish condiment (being oil and vinegar) for another example, peanut butter and jam etc.Two or more combined package structures independently of these product needed, placement arranged side by side just as No. 574 patents propositions all has the structure of a thrust on each sack or the box.Yet, there is important disadvantages more in the roughly packaging structure of the thrust of symmetry that has found that No. 574 patent propositions: always the spacing than expectation is far away for the spacing of being separated by that several materials flow out when openable container, is disadvantageous for mixing easily behind the openable container like this.

The purpose of this utility model provides a kind of new improved packaging bag that is used for flowable products.Another purpose of the present utility model is the various shortcoming that overcomes the near symmetrical thrust of above-mentioned No. 574 patents, and provide a kind of stream material, later-model improved packing distribution bag packed, it uses the method for stress concentration, open hard and compound material by bending to " V " font, therefore this method is opened thin but harder plate material is very practical.Another purpose of the present utility model is that a kind of its stress concentration thrust of proposition is asymmetric with the novel package bag that can be used for packaging flowable materials perpendicular to the line of dislocation line or tomography trace.

The purpose of this utility model is that also this novel package bag can be the structure of two or more combinations, can also distribute the flowable products that two or more needs are deposited respectively before use simultaneously.

Again furtherly, it is a kind of later-model improved by two or more packing distribution bags that combine that the purpose of this utility model also is to provide, the improvement of its packaging bag than before also is to pack at least two kinds and deposits separately at ordinary times, the material that just mixes in use only, by two contiguous asymmetric thrusts of placing are set, they are positioned on dislocation line or the tomography trace and from hard dull and stereotyped outside face upper process, when hardboard is crooked, this thrust splits along line of rupture, thereby producing at least two independences but the opening of arranged in proximity, can be the independent above-mentioned flowable mass of discharging simultaneously again from these openings.

The purpose of this utility model is that also it proposes a kind of later-model packing distribution bag that is used for packaging flowable materials, the pyramid stress concentration thrust that is similar to half or splits is arranged on it, it is positioned on hard dull and stereotyped dislocation line or the tomography trace and to outer process, and it is roughly to be symmetrical in dislocation line but to be asymmetric with the vertical line of dislocation line to place.

Another purpose of the present utility model is to propose a kind ofly like this by two or more packaging bags that combine, and it can distribute two or more different flowable products exactly.

Various purpose of the present utility model and advantage, a part as mentioned above, a part can find out from embodiment, recognizes during other all right Accessory Right requires.

The utility model comprises novel parts, structure, position arrangement, array mode, and this paper has also narrated embodiment and innovative approach.

Briefly, the utility model is a kind of later-model packing distribution bag that is used for flowable products, it only forms the controollable opening to multiple packing in some way with one hand, these materials can comprise low price easy fracture material, as Web materials hard, high anti-permeability, as individual layer or lamination, or by polyester, polypropylene or nylon extruded material, the latter can reduce the price of packing and the packing box that is combined by two or more is provided.

By most preferred embodiment of the present utility model, packing distribution bag comprises a harder flat board, at least be fixed with top layer hard, high anti-permeability on it a side, a flexible layer is fixed on a side of hardboard in addition, to form an osed top sack.Than the delineation trace on the hardboard or the cut channel zone or the dislocation line that otherwise form all is along its cross central line, and at least one stress concentration thrust is arranged from than the dislocation line of hardboard or a position upper process of tomography trace.This thrust of splitting is that half or the pyramid thrust split are constituted by one haply.

Above-mentioned half or the pyramid split are the perpendicular line that is asymmetric with dislocation line, and it comprises the sidewall of an approximate vertical, and this wall is towards extending perpendicular to the dislocation line direction and along the direction that is directed upwards towards the thrust summit than hardboard.Have found that half that above-mentioned approximate half or the pyramid split and the different shape that hereinafter will mention change to some extent or the pyramid of splitting have some surprising and unexpected advantage than the thrust of No. 574 said cardinal principle symmetries of patent.

People are surprised to find half or the thrust split has enough intensity, it can be opened more crash-resistant high anti-permeability material and can keep thrust not collapse, under same opening size requires, can also be processed into more thinnerly slightly, on material, can save 10% expense like this than symmetrical thrust material requested.

Though any theory of no use is here explained this result, it is believed that approximately perpendicular sidewall plays pillar stiffener, even this sidewall is thinner than the prism of the symmetrical thrust of cardinal principle, it still can prevent the prism slump of thrust.

Under identical height and identical sidewall wedge angle condition, using opening that approximate half or the thrust split of the present invention form usually less than using the opening that symmetrical thrust forms, is favourable at the low-viscosity material of distribution during as polishing alcohol, soy sauce etc.Under the less situation of required opening size, the size of the thrust of near symmetrical just requires very little like this, approximately is half of thrust size among the present invention, therefore approximately the thrust of symmetry require during fabrication meticulousr, thereby accurately improved expense.

According to another kind of most preferred embodiment of the present utility model, it is a packings distribution bag that is combined by two or more, which comprises at least two independences and adjacent sack or box, each box has one side to be attached on the harder flat board, at least two asymmetric thrusts of stress concentration lay respectively on two sacks or the box, each thrust from least one position of harder dull and stereotyped dislocation line or tomography trace towards the direction projection that deviates from composite bag.Preferably each approximate half or asymmetric pyramid thrust of splitting, be symmetrical in dislocation line or tomography trace substantially, but be asymmetric with the perpendicular line of dislocation line, it comprises the sidewall of an approximate vertical, and this wall is towards extending perpendicular to the dislocation line direction and from the summit that is directed upwards towards thrust than hardboard.

From as can be seen above, multiple box can be packed at least two kinds and have only and just know with the flowable mass that mixes in use and will pack crooked formation opening when forming " V " font so that stream material flows out simultaneously from two isolated openings.

Aforementioned two thrusts that are similar to half or split preferably are provided with like this, and promptly vertical sidewall is tight adjacent being oppositely arranged substantially.People find that unexpectedly this two or Multiple Combination packaging bag can also make in the following manner; After these thrusts are opened, the flowable mass of packing respectively or form one liquid stream or liquid stream that two bursts of spacings of being separated by are very little thereby can be easily flow out and fully mix according to its direction.

Term used herein " dislocation line " or " tomography trace " comprise aforesaid cut.It may be that a straight line that strides across hard dull and stereotyped part or all also may be to form a fault region with other instrument that can reduce its intensity outside the cut instrument.

Curve described above and straight flange have constituted its minor axis of pyramid and preferably have been positioned on dislocation line or the tomography trace.

Clearly, the of the present utility model various purposes of more than enumerating can realize by embodiment of the present utility model.Therefore, form by high strength, high anti-permeability material by most preferred embodiment packing distribution bag of the present utility model, its unlatching is to make asymmetric stresses concentrate thrust to break and availablely make than the more thinner gauge material of packing distribution bag that the near symmetrical thrust was arranged in the past, so it is more more economical.In addition, asymmetric stresses concentrates thrust can make the manufacturing of two or more combination boxlike wrapping bag can be more favourable.Can make the more abundant mixing of flowable mass of independent storage or otherwise use as it.

As can be seen, be exemplary and illustrative to description of the present utility model in the context, but be not determinate.

Below in conjunction with accompanying drawing most preferred embodiment of the present utility model is described, among the figure:

Fig. 1 is according to the top view of a packing distribution bag of the present utility model when not opening, and it shows from be similar to half or the pyramid thrust split than an of lateral process of hardboard, and the minor axis of this thrust is positioned on the dislocation line;

Fig. 2 is the transparent view that packing shown in Figure 1 is distributed bag;

Fig. 3 is the lateral plan that packing shown in Figure 1 is distributed bag, and wherein packaging bag is ruptured by bending and along dislocation line;

Fig. 4 is that packaging bag is in not opening among the figure according to the transparent view of the packing distribution bag of two combinations of a most preferred embodiment of the present utility model;

Fig. 5 is the end elevation of the packing distribution bag of two combinations shown in Figure 4;

Fig. 6 is the transparent view of the packing distribution bag of two combinations shown in Figure 4, is roughly the state that half or the pyramid stress concentration thrust split have been fractureed for packaging bag by bending and each shown in the figure;

Fig. 7 A, 7B, 7C are the top views according to other various forms of packing distribution bags of the present utility model, and Fig. 7 A is depicted as the packing distribution bag of three combinations, Fig. 7 B and Fig. 7 C are depicted as the packaging bag of two combinations, and its packaging bag is of different sizes to distribute the different product of different amounts;

Fig. 8 A, 8B and 8C are the component diagrams that asymmetric stresses of the present utility model is concentrated the various embodiment of thrust, Fig. 8 A is depicted as half of elongation or the pyramid of splitting, its major axis is positioned on the dislocation line like this, Fig. 8 B is depicted as half or the round dome shape of splitting, and Fig. 8 C is depicted as half or the taper shape split.

With reference now to accompanying drawing 1～3,, they have showed the most preferred embodiment of packing distribution bag constructions in the utility model, with label 10 expressions.Packaging bag 10 comprises one more firmly, more flat flat board 12 and be installed in the flexible layer 18 that dull and stereotyped 12 one sides go up outer rim rightly, flexible layer 18 form at least one sack or box and with described dull and stereotyped 12 form can packaging flowable materials container.

In most preferred embodiment, a fine sealing or even bubble-tight plate 14 are fixed in dull and stereotyped 12 on the one side of flexible layer 18 by whole.The making of flexible layer 18 can be by simple method such as vacuum forming, pressure forming, machine up moulding or with synthetic method, and flexible layer 18 integral body similarly is fixed on plate 12 or the complex laminate 12,14.

The barrier material 14 and the joint between the flexible layer 18 of hard flat board 12, high-air-tightness can be formed by prevailing method in the packing technique, as welding, heated sealant, bonding etc., the physical interface method decides according to the character of the flowable mass of the characteristics of material and packaging.

Briefly, hard dull and stereotyped 12 are made up of polystyrene or polyester or different molecule copolymer, high anti-permeability plate 14 by suitable leak free and be bubble-tight material comprise saran, metal foil layer comprise the layer of metal paper tinsel or vinyl or just the paper tinsel layer formed, comply with the character of packaged material particularly and decide.A kind of special crash-resistant high anti-permeability structure comprises the Sa Ran layer, (this material is known as " Saranx " to be surrounded by polyethylene layer in its both sides, in " DOW " chemical company sale is arranged), such material is as high anti-permeability plate 14, and the laminar texture that is formed by polystyrene or polyester is as hard dull and stereotyped 12.

Be appreciated that the various common technology that connection between material 12,14 and 18 is introduced before can using, and depend on the character of packaged flowable mass.These or materials similar and adapter system all have argumentation in aforementioned No. 640 and No. 574 patents, details please be read list of references.

From constructional drawing 1～3, can find out,, store thus and distribute flowable mass by forming osed top sack or box 22 between flexible layer 18 and hard dull and stereotyped 12,14.Can be clear that by Fig. 4 osed top sack or box 22 comprise a pair of closely adjacent box 22A, 22B, are separated by a shallow slot or groove between them, in No. 715 patents that aforementioned Randt covers detailed argumentation are arranged.

Packing on the hard flat board 12 of distribution bag 10, drawing on the outside face that deviates from enclosure 22 has indentation.As previously mentioned, be appreciated that the present invention is not only limited to the tomography trace of straight line, term " dislocation line " refers to also to comprise that various tomography types or weakened zone are to satisfy the needs of various characteristics.

Press the formulation in the utility model, packaging bag 10 has one or more asymmetric stresses and concentrates thrust 26, they all be positioned at along dislocation line 24 outside and from the outside face of hard flat board 12 or lamellated plate 12,14 towards outside direction projection.By preferred example thrust 26 is to be approximate half or the pyramid of splitting, so that dislocation line 24 summit by thrust 26 when splitting.Thrust 26 has a sidewall 27 that cardinal principle is vertical, and is along reach the direction of pointing to pinnacle 26A from hard flat board 12 perpendicular to dislocation line 24.From above introduction and Fig. 1,2 as can be seen: thrust 26 is symmetrical in dislocation line 24, but is asymmetric with the straight line of vertical fault line 24.

By the above introduction or No. 574 patents of covering etc. the people in more detail referring to the Randt, hard dull and stereotyped 12 bending to " V " font and during jackknifing, dislocation line 24 plays guiding on the packing distribution bag 10 along dislocation line 24.When being bent to " V " font, produce stress concentration at pinnacle 26A by external force and from pinnacle 26A to the moment of deflection that forms along distance between hard dull and stereotyped 12 the bending axis than hardboard 12.Just as described abovely produce unexpected flexure stress at approximate non-symmetrical half or thrust 26 places of splitting, its generation type is similar to symmetrical thrust, as described in No. 574 patents, can believe because the buttressing effect of vertical sidewall 27, it is the bigger power of bearing ratio near symmetrical thrust shockingly, causes plate 12 and multilayer board 14 to break to form opening 30 thus.

With breaking of thrust 26 and pinnacle 26A, tomography 24 also ruptures, yet, No. 574 patents of covering etc. the people as the Randt are described, here also be kindred circumstances, when material 14 is crash-resistant high anti-permeability structure, along the understressing of dislocation line 24 with this material that fractures, than the dislocation line on the hardboard 12 just as bending axis, unless it is fractureed by thrust 26.When parallel when applying two parallel power on two parts 10A that is divided into two of packaging bag 10 and 10B, just the flowed material in it is extruded by exporting 30 by sack or box 22 that two parts 10A and 10B and flexible layer 18 are formed.Because high anti-permeability material 14 can not can only split along thrust 26 along dislocation line 24 fractures, so opening 30 is unique outlets of the flowable mass of packaging.

Can find out obviously that from above introduction when than two parts 10A, the 10B of hardboard during simultaneously with flexible layer 18 mutual actions, the flowed materials in the sack 22 will be from exporting 30 a fluid streams that form a rule.

Be appreciated that making 24 of dislocation lines be formed on to stride across on the thrust 26 also can produce identical effect.Perhaps dislocation line 24 also can extend to above thrust 26 but not arrive the edge of packaging bag.

Now can be further with reference to figure 4～6.It is the most preferred embodiment of package construction shown in Fig. 1～3, and above-mentioned packaging bag label is 50.

Can find out by Fig. 4,5, packaging bag 50 may comprise the high anti-permeability of a multilayer, more firmly, more flat plate 12 ', 14 ', one flexible layer 18 ' be fixed on plate 12 ', 14 ' a face on, also shown among the figure a pair of relatively, near place approximate half or split pyramid stress concentration thrust 26 ', 26 " and dislocation line or tomography trace 24 '.Form by preferred example flexible layer 18 two promptly be separated and closely adjacent sack or box 22 ', 22 ", form " dual " packaging bag thus.More advantageously each sack or box 22 ', 22 " container 22A ', the 22B ' and the 22A that comprise a pair of placed adjacent ", 22B ", shallow slot or groove are arranged therebetween.As can be seen thrust 26 ', 26 " respectively sack 22 ', 22 " on.Preferably, thrust 26 ', 26 " be positioned at very near each sack 22 ', 22 " inside edge, and make vertical sidewall separately into face-to-face relationship, can make between the thrust slit very little like this, roughly be 1/16 " or littler.

As seen, dual packet pack 50 can be accomplished: (i) packing needs individualism before use, has product of different nature from above introduction and Fig. 6.(ii) the edge by bends package distribution bag is converted into it " V " font, and the thrust 26 that fractures ', 26 " with form respectively opening 30 ', 30 " thereby can open packaging bag simultaneously, and distribute, mix or synthesize.

Be appreciated that than hardboard 12 or 12 ' formation can use aforementioned various method, also can not adopt sealing or high anti-permeability material 14 or 14 ', and this structure also belongs within the utility model scope.Described in introducing about the effect of the dislocation line that adds in advance in the past, such structure may be particularly suitable for distributing low-viscosity flowable mass such as water, cream, alcohol and require well-regulated a fluid stream, and dripless produces.Such flowable mass does not need special sealing, high anti-permeability layer, and is suitable for other advantages of this packing distribution bag.

Dual packet shown in Fig. 4 and Fig. 5 pack 50 be by one single layer hard, dull and stereotyped 12 ', two sacks 22 of a 14 ' and single layer flexible material layer 18 ' form ', 22 ".Be appreciated that, dual sack as 50 or other as shown in Figure 7A 55, it has 3 or more sack so independently, also can connect and form by the sack shown in Fig. 1～3, shown in Fig. 7 A, have on the inward flange of its each independent box asymmetric stresses concentrate thrust 26 ', 26 ", 26 ' ", 26 " ".Can provide two a fluid streams easily after as can be seen from Figure 7 the stress concentration thrust is fractureed.

Fig. 7 B and 7C have showed other two kinds of structures of two-fold packing distribution bag in the utility model.Two boxes of overpacking distribution bag 60 have identical length but width does not wait among Fig. 7 B, the identical but length difference of two box width of packing distribution bag 65 among Fig. 7 C.Can find out that thus the utility model can be used to pack the product of different in kind, they can independently be deposited, and can be accurately side by side to distribute again.

Now can be further with reference to figure 8A to 8C, they have showed the various forms of packing distribution sack stress concentration thrust in the utility model.

Fig. 8 A has showed the pyramid thrust 56 that is similar to half of Fig. 1 and Fig. 4 or splits that has extended, and it is positioned on its major axis and the position that dislocation line 24 overlaps.Fig. 8 B has showed approximate half or the cheese thrust 66 split.Dislocation line 24 from the arc surface of half or the cheese thrust 66 split and end face center-point 66A pass through, and break it into two.Fig. 8 C has showed approximate half or the conical projections thing 76 split, and by dislocation line 24 from its summit by breaking it into two.

By above discussion, can find out by Fig. 8 A～8C, wherein each structure all can make crooked crack force be delivered to the summit with maximum stress lumped values, guaranteed openability thus, and each thrust comprised a sidewall that cardinal principle is vertical, and it has increased intensity as the upright supports element thereby given under the situation of wall thickness.

Should be appreciated that in described each asymmetric stresses of the utility model is concentrated thrust the upright supports element all is that vertical sidewall is to gain in strength.Yet be appreciated that the asymmetrical graphic that also can comprise other in the utility model, second half this angle of sidewall of for example forming folded angle in half sidewall and bottom surface of thrust and thrust is different.Similarly, asymmetric sidewall can be flat vertical wall, the wall that comprises two or more planes, curved surface or curved surface and planar combination wall.When asymmetric wall was curved surface or curved surface and planar combination, then asymmetric sidewall was less than second half the distance in sidewall solstics of composition thrust on the other side along solstics on the asymmetric wall of dislocation line.

The utility model is not limited in the content described in the above embodiment, for technical personnel in the art, under the utility model spirit, can make various improvement, and these improvement also should be within the utility model scope.

Claims (14)

1, a kind of packing that is used for, the sack of distribution flowable mass, it has one harder, more flat flat board, one flexible layer is fixed on this dull and stereotyped face, and form a sack that can be used for packaging flowable materials, have one to carve thereon in advance on this hard flat board, dislocation line with predetermined length, also have on being positioned at the opposite one side of described sack on the dislocation line of this hard flat board, and can be along the thrust of dislocation line fracture, it is characterized in that: described thrust is symmetrical substantially on the both sides of dislocation line, but asymmetric substantially on the both sides perpendicular to the line of this dislocation line, and the highest point of projection is just on this symmetric line.

2, packing distribution bag as claimed in claim 1 is characterized in that the hard dull and stereotyped high anti-permeability material of metallic paper that is.

3, packing distribution bag as claimed in claim 1 is characterized in that the hard dull and stereotyped saturating property of the plastic leakage-proof material that is.

4, packing distribution bag as claimed in claim 1 is characterized in that hard flat board comprises metallic paper and these two kinds of anti-permeability materials of plastics.

5, packing distribution bag as claimed in claim 1 is characterized in that it has a plurality of thrusts along the dislocation line placed adjacent.

6, packing is distributed bag according to claim 1, it is characterized in that described thrust is being pointed section along the dislocation line direction.

7, packing is distributed bag according to claim 1, it is characterized in that flexible layer forms at least two sacks that promptly separate adjacent again placement arranged side by side in contiguous hard, dull and stereotyped one side, and have at least two thrusts, each thrust all is positioned at the top of an above-mentioned sack, each thrust at least one position of the dislocation line on the hard flat board towards the direction that deviates from sack to outer process.

8, as packing distribution bag as described in the claim 6, it is characterized in that thrust has an approximately perpendicular sidewall, its bearing of trend is perpendicular to this dislocation line, and is directed upwards towards the summit of this thrust from hard flat board.

9, as packing distribution bag as described in the claim 7, each all is the pyramid of half to it is characterized in that described thrust, it has an approximately perpendicular sidewall, its direction is perpendicular to this dislocation line and is directed upwards towards the summit of this thrust from hard flat board, and described thrust is arranged to its vertical wall separately opposite one another and closely adjacent.

10, as packing distribution bag as described in the claim 8, it is characterized in that described thrust is the pyramid that is similar to half, the dislocation line on the above-mentioned hard flat board is by the thrust summit.

11, as packing distribution bag as described in the claim 8, it is characterized in that described thrust is a conical projections thing that is similar to half, and dislocation line passes through from the summit of thrust.

12, as packing distribution bag as described in the claim 8, it is characterized in that described thrust is a cheese thrust that is similar to half, and should the hard dull and stereotyped dislocation line of going up by the thrust summit.

13, as packing distribution bag as described in the claim 9, it is characterized in that the described pyramid thrust that is similar to half has not isometric axle, and minor axis is along the direction of dislocation line.

14, as packing distribution bag as described in the claim 9, it is characterized in that described approximately half pyramid thrust has not isometric axle, and major axis is along the direction of dislocation line.

Images