JP2007532414A - Yamagata crest package for liquid food and its sizing method - Google Patents

Abstract

  A front and rear inclined top wall (10, 11) manufactured by folding and sealing the sheet-like packaging material (2) and joined together by a top transverse seal (12); And a pair of side top walls (18, 19) connecting the respective side edges (15, 16) of the inclined top walls (10, 11). , 19), each of the portions (46, 47) of the sheet-like packaging material (2) is a predetermined fold that delimits a number of panels (A, B, C, D, E, F, G). Obtained by bending along lines (31, 33, 42, 44, 50, 51, 54, 55, 56, 65; 31, 33, 43, 45, 52, 53, 57, 58, 59, 66) Yamagata top package (1,1 ') for liquid food, (A, B, C, D, E, F, G) are rigid bodies, and each fold line (31, 33, 42, 44, 50, 51, 54, 55, 56, 65; 31, 33, 43, 45) , 52, 53, 57, 58, 59, 66), the fold line (from among a plurality of possible fold lines designed to form the side top wall (18, 19) by being rotated around 31, 33, 42, 44, 50, 1, 54, 55, 56, 65; 31, 33, 43, 45, 52, 53, 57, 58, 59, 66) are determined.

Description

  The present invention relates to a chevron top package for liquid food.

  As is known, many liquid foods such as fruit juice, UHT (ultra high temperature processed) milk, wine and tomato sauce are sold in packages made of sterilized packaging materials.

  The package material has a multilayer structure in which both sides of a fiber material such as paper are covered with a heat-sealable plastic material such as polyethylene, and in the case of a sterile package for long-term storage products such as UHT milk, the package The material also includes an oxygen barrier material layer, for example defined by an aluminum coating overlying a layer of heat-sealable plastic material, which further comprises another heat which will ultimately form the package inner surface in contact with food. Covered by a sealing plastic material.

  A typical example of such a package is a parallelepiped-shaped package known as Tetra Brick Aseptic® for liquid or liquid foods, and two inclined walls or inclined walls with a cross-top seal. It is a so-called “mountain top” package, commonly known under the trade name Tetra Rex®, having a mountain top formed by bonding.

  The package described above can be formed from a continuous tube obtained by folding a web-like package material and sealing it longitudinally. The web-like packaging material is sterilized by applying a chemical sterilizing agent such as a hydrogen peroxide solution in the packaging machine, and the sterilizing agent is heated and evaporated after sterilization and removed from the surface of the packaging material. The package material web thus sterilized is held in a closed sterile environment and folded and sealed longitudinally to form a vertical tube.

  The tube is filled with aseptic or sterilized food, sealed, and cut into equally spaced transverse sections to form a pillow pack, which is then mechanically folded into a finished package. It is formed.

  Two basic types of web-fed filling / forming machines are known. The more common first type is a machine with two pairs of reciprocating jaws. Machines of this type are, for example, the Tetra Pak Carton Ambient AB company in Lunz (Sweden), the Rising Gate, and the Tetra Pak Carton Ambient S. in Modena (Italy), Via Delfini 1. p. Includes TB / 21, TBA / 19 and TAB / 21 series manufactured by Company A. The second type of web feeding type molding machine is an endless chain type, and the forming unit and the sealing unit are carried by an endless chain facing each other instead of a reciprocating jaw. An example of this type of machine is also Tetra Pak Carton Ambient S.P. p. TAB / 22 manufactured by Company A.

  In order to be able to fold the packaging material both in the forming fold and in the final fold, fold lines forming a so-called “fold line pattern” are formed in the packaging material in the production line.

  Alternatively, the blank formed into a package on the forming mandrel can be cut from the packaging material and the formed package can be filled with food and sealed.

  In particular, when formed on a forming mandrel, the unfinished package has the shape of a parallelepiped that opens upward. The tops of the chevron are formed by compressing the opposite side walls of the top of the unfinished package together to align the top edges of the other side walls, and then sealed together to form a lateral seal.

  Once formed in this way, the package of the type described above is subjected to other processes such as attachment of a reclosable opening device.

  The chevron top package is very conveniently used in combination with a reclosable opening device. This is because the angled top wall is wider than the corresponding planar portion of the parallelepiped, which allows for the attachment of larger opening devices, for example with screw caps.

  The package manufacturing industry, in particular, needs to be constantly improved to ensure proper folding of the packaging material while at the same time allowing various shapes and dimensions of the chevron top package. This need is driven by the market demand for the diverse aesthetic appearance of the package and the need to ensure that any type of food can be poured out without the phenomenon known as “breathing”. This “breathing” phenomenon is an intermittent outflow of food from the package and is characterized by a blocked flow phase and a rough and rapid flow phase with food splashing.

  For the latter, it should be noted that different foods have different viscosities, so different heights are required at the top of the chevron to ensure proper pouring.

  It is an object of the present invention to provide a chevron-top package that can meet the above needs in a very simple and inexpensive manner.

  This object is achieved by a chevron top package according to claim 1.

  Another object of the invention relates to an apparatus and method for sizing variously shaped chevron top packages while ensuring proper folding of the packaging material.

  This object is achieved by the method described in claim 5.

  Two preferred non-limiting embodiments of the present invention will now be described by way of example with reference to the drawings.

  Referring to FIG. 1, reference numeral 1 designates a chevron top package for food according to the present invention.

  The package 1 is made of a sheet-like packaging material 2 (FIG. 6) (hereinafter referred to as “material 2”), and in particular includes a main part 3 and a chevron top 4 in the form of a parallelepiped.

  In particular, the material 2 defines the exact length of the packaging material used to produce a single package 1 and has a multilayer structure of the type already described.

  The main part 3 has a base wall 5, preferably a square, a front wall 6, a rear wall 7, and a pair of side walls 8, 9.

  The chevron top 4 includes a front sloped top wall 10 with an opening device 24 (FIG. 1) and a rear sloped top wall 11 joined to the front sloped top wall 10 by a top lateral seal 12 of the package 1.

  The chevron top 4 further includes a pair of top side folds 13, 14 adjacent to the side ends 12 a, 12 b of the top lateral seal 12, respectively. The top side folds 13, 14 are for packages used by food. Folded out of the top space to form respective triangular side top walls 18, 19 that extend along the extensions of the side walls 8, 9.

  Each top side folding allowance 13, 14 is formed by one side surface formed by each side edge 15 of the front inclined top wall 10 and each side end 12 a, 12 b of the top lateral seal 12. And other side surfaces bent on the respective side edges 16 of the rear inclined top wall 11.

  The side folding margins 13, 14 are folded on the respective triangular tops 20 of the side walls 8, 9. The top 20 is flat and is substantially coplanar or slightly inwardly inclined with respect to the respective side walls 8, 9 as will be described in detail below.

  To better understand the package shape, reference is made to FIGS.

  The package 1 is formed from a continuous tube (not shown) of packaging material, which is formed by folding the packaging material web and sealing it longitudinally, and the length of material 2 (FIG. 6) is repeated. Formed. More precisely, the edge 21 of the material 2 is overlaid and sealed over the opposite edge 22 so that it extends longitudinally substantially along the vertical centerline of the rear wall 7 of the finished package 1. A seal 23 is formed.

  Thereafter, the tubes are sealed laterally at regular intervals and cut along the transverse seals to form a so-called pillow-shaped pack (not shown), the pillow-shaped pack being a plurality of final packs. It is transformed into a finished package 1 through a bending step.

  As is known, a pillow-shaped pack has a parallelepipedal base portion and a tapered end that faces away from the base portion to the respective lateral seal.

  FIGS. 3, 4 and 5 show an intermediate pack 26 labeled 26, which is obtained by flattening one tapered end.

  In particular, the intermediate pack 26 is completed with a base part 28 of parallelepipeds formed by a base wall and four side walls respectively corresponding to the walls 5, 6, 7, 8, 9 of the main part 3 of the finished package 1. It includes an upper tapered end 29 that is tapered from a base portion 28 designed to form the chevron top 4 of the package 1 toward the top transverse seal 12.

  More specifically, the upper tapered end portion 29 forms the inclined top walls 10 and 11 on the front side and the rear side of the finished package 1, and protrudes from opposite sides of the inclined top walls 10 and 11, as described above. Side fold margins 13 and 14 are provided which are bent on the top portions 20 of the 8 and 9, respectively.

  Alternatively, the intermediate pack 26 can be formed from blanks of packaging material each equal to the length of the material 2, which blanks are formed and formed into packs on a forming mandrel (not shown). The pack is filled with food and sealed.

  Material 2 (FIG. 6) includes a plurality of weakening lines formed by a fold line pattern 30, i.e., a fold line forming roll, to form a fold line along which the material is folded during the forming and final folding stages.

  The fold line pattern 30 includes four lateral fold lines 31, 32, 33, 34 as is known. Lines 31 and 32 are located near the lateral ends of material 2 and delimit the respective top and bottom lateral seal points 31a and 32a. Lines 33 and 34 form horizontal corners of the chevron crest 4 and the base wall 5 and are also shown in FIGS. 1, 3, 4 and 5 for clarity.

  The fold line pattern 30 also, as is known, forms four side fold lines 35, 36, which form the side corners of the package 1 and extend between the transverse fold lines 33, 34. 37, 38 and a plurality of fold lines 40 included between line 34 and bottom lateral seal portion 32a, the fold line 40 being flattened to be folded to form the base wall 5 Designed to form 26 bottom side folds (not shown as known). Fold line 40 is a well-known arrangement and is not shown in detail.

  The longitudinal fold lines 35, 36 are located near the side edges 21, 22, respectively, and the longitudinal fold lines 37, 38 are arranged between the lines 35, 36.

  For clarity, the front wall 6 of the package 1 is bounded by lines 37, 38, the rear wall 7 is bounded by lines 35, 36, and the side walls 8, 9 are bounded by lines 35, 37. The side wall 9 is bounded by lines 36,38.

  The fold line pattern 30 (FIGS. 5 and 6) further includes a plurality of additional fold lines in a portion included between the horizontal fold lines 31 and 33. The added fold line includes four substantially longitudinal fold lines 42, 43, 44, 45, which fold lines define the side corners of the front inclined top wall 10 and the rear inclined top wall 11. And extends from the intersection of the line 33 and each of the longitudinal lines 35, 36, 37, 38. In the illustrated example, the lines 42, 43, 44, 45 are slightly inclined so as to form upwardly tapered trapezoidal walls 10, 11, but are perfectly longitudinal, ie An extension of the lines 35, 36, 37, 38 can be formed.

  Lines 42, 44, the top lateral seal portion 31 a included between the lines 42, 44, and the portion of the line 33 included between the intersections 35 a, 37 a are the side fold 13 and the top 20 of the side wall 8. Determine. Similarly, the line 43, 45, the top lateral seal portion 31a included between the lines 43, 45, and the portion of the line 33 included between the intersections 36a, 38a are the side fold margin 14 of the side wall 9 and Define the top. Further, the longitudinal fold lines 42, 43, 44, 45, the lateral line 33, and the top lateral seal portion 31a delimit the other two portions 48, 49, each of which is a part. 46 and 47, defining the front and rear inclined top walls 10 and 11, respectively.

  The fold line 37 further includes two inclined fold lines 50 extending from the points 35a, 37a and 36a, 38a at the folding margins 46, 47 and intersecting at points 31b and 31c along the fold line 31, respectively. , 51 and 52, 53, and forms an isosceles triangle with the portion of the line 33 included between the portions 35a, 37a and the portions 36a, 38a, respectively.

  Lines 50, 51 and 52, 53 respectively define the limits of the lateral fold margins 13, 14 extending in the lateral direction.

  Further, there are three fold lines indicated by reference numerals 54, 55, and 56 with respect to the folding margin portion 46, and three fold lines indicated by reference numerals 57, 58, and 59 with respect to the folding margin portion 47, which are respectively point 35a. , 37a, 31b and 36a, 38a, 31c extend to the intermediate points indicated by reference numeral 60 for the folding margin portion 46 located within the respective isosceles triangles and 61 for the folding margin portion 47, respectively. Yes.

  The fold lines 54 and 55 and the fold lines 57 and 58 are symmetric with respect to the fold line 56 and the fold line 59, respectively.

  Lines 54, 55 of the folding allowance 46 extend between the intermediate point 60 and the respective points 35 a, 37 a and define an upward boundary above the top 20 of the side wall 8. Similarly, the lines 57 and 58 of the folding allowance portion 47 extend between the intermediate point 61 and the respective points 36 a and 38 a, and define an upward boundary above the top 20 of the side wall 9.

  The fold line pattern 37 further includes discontinuous fold lines 65, 66, that is, non-interrupted discontinuous lines, in the respective fold portions 46, 47, and the discontinuous lines intersect with the respective fold lines 50, 52. Each intermediate point 60, 61 and the transverse fold line 31 extend between the respective points intersecting the longitudinal fold lines 42, 43. In particular, each discontinuous fold line 65, 66 is divided into two portions 67, 68 that form an angle close to 180 ° but not 180 ° by fold lines 50, 52, respectively. Portions 67 and 68 extend from fold lines 50 and 52 to lateral seal portion 31a and respective midpoints 60 and 61, respectively.

  The above-described folding lines of the folding margin portions 46 and 47 define the boundaries of a large number of triangular panels A, B, C, D, E, F, and G that are folded according to a predetermined procedure described in detail later.

  In particular, referring to the folding margin 46, panel A is delimited by fold lines 31, 44, 51, panel B is delimited by fold lines 51, 55, 56, and panel C is delimited by fold lines 33, 54, 55 delimits the apex 20 of the side wall 8, and the panel D has a fold line 56, a fold line 65 portion 68, and a fold line 50 portion included between the fold lines 65 and 31. The panel E is bounded by the fold line 54, the part 68 of the fold line 65, and the part of the fold line 50 included between the fold line 65 and the point 35a, and the panel F is fold line 31. , The fold line 65 and the fold line 50 included between the fold line 65 and the fold line 31, and the panel G has the fold line 42, the fold line 65 part 67, and the fold line. Fold line 5 included between 65 and point 35a It is bounded in part.

  Since the same definitions of panels A, B, C, D, E, F, and G can be applied to the folding margin portion 47 in a complementary manner, they will not be repeated. This is because the folding margins 46 and 47 extend in the middle and are symmetrical with respect to an axis parallel to the longitudinal folding lines 37 and 38.

  While each folding margin 46, 47 is formed, panels E, B are folded on panel C, panel F is superimposed on panel G, and panel A is all the remaining portions of folding margins 46, 47. The side top walls 18 and 19 are formed.

  According to an important concept of the present invention, the folding line pattern 30 of each folding margin 46, 47 of the material 2 is such that the formation of the side top walls 18, 19 is the respective panel A, B, C, D, E, F. , G rotate as rigid bodies around the respective fold lines (50, 51, 54, 55, 56, 65 in the folding margin 46 and 52, 53, 57, 58, 59, 66 in the folding margin 47). Designed to be achieved by

  In the present description and claims, the expression “rotation of the panel as a rigid body” does not exclude slight deformations of the packaging material, especially due to the thickness that occurs when the panels are superimposed.

More specifically, the value of the angle α formed between opposite side edges concentrated on the top transverse seal 12 along each of the side top walls 18, 19 of the package 1 is selected,
Select the length of the front inclined top wall 10 as measured in the direction intersecting the top transverse seal 12;
The respective panels A, B, C, D, E around the respective folding lines 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 65, 66 of the folding margin portions 46, 47, respectively. , F and G are rotated as rigid bodies to determine the position and range of the fold lines so that the respective side top walls 18 and 19 of the panel are formed, whereby the folding portions 46 and 47 of the material 2 are folded. A line pattern 30 is formed.

  Since each side top wall 18, 19 is defined by the panel A of the respective folding allowances 46, 47, the angle α is also each line 44, 45 and the respective folding line 31 located at each folding allowance 46, 47. And formed by the part.

  Applicants have found that the above-described steps can be used to define another fold line pattern in the fold portions 46 and 47 to obtain another chevron 4 by using a simple geometric formula as described below. .

  For simplicity, the following description refers only to the folding portion 47 and FIGS. 2 and 7, but the same idea applies equally to the folding portion 46 and will not be repeated.

  In particular, the positions and ranges of the folding lines 52 and 53 can be obtained by determining the angle β formed by the lines 52 and 53 and the portion of the folding line 33 included between the points 36a and 38a.

The angle β can be calculated as a function of length l by
[Equation 1]
β = tan ⁻¹ (1 / (c / 2))
Where c is the width of the package 1 and is equal to the distance between the fold lines 36 and 38 or 35 and 37 in the given data.

  The angle β extends from the points 36a and 38a, respectively, to allow the formation of lines 52 and 53 defining the isosceles of the isosceles triangle, the third side of which is indicated by the portion of the folding line 33 contained between the points 36a and 38a. It is.

Location and extent of the fold lines 57, 58, 59, and the position of the intermediate point 61 can be obtained by determining the angle beta ₂ formed by the lines 57, 58 and the fold line 52 and 53 respectively.

Angle beta ₂ can be calculated by the following equation.
[Equation 2]
β ₂ = {β − (θ ₁ −θ)} / 2
Here, θ is an angle formed between the fold lines 43 and 45 and the fold lines 52 and 53 in a state after the folding of the mountain-shaped top 4 is completed and the panel A is overlaid on the panel C. respect represent, theta ₁ and each fold line 43 and 45, it represents the angle formed by the portion of crease line 33 comprised between points 36a, 38a.

More specifically, θ and θ ₁ can be calculated as follows:
[Equation 3]
θ = 180 °-α -β
Considering that α is also an angle formed by each fold line 43, 45 and each part of the fold line 33 located outside the fold margin portion 47 and extending from the points 36a, 38a, respectively.
[Equation 4]
θ ₁ = cos ⁻¹ ((c / 2) / l ₁ )
Here, l ₁ represents the length of the folding lines 43 and 45 and can be calculated as a function of the length l ₁ and the apex angle α by the following equation.
[Equation 5]
l ₁ = 1 / cos (90−α)

The calculation formula of θ ₁ is that the folding line 45 defines a hypotenuse of a right triangle after the peak 4 is bent, and the two sides (catheti) sandwiching the right angle are the folding included between the apex of the side apex wall 9 and the points 36a and 38a. It is derived by considering that it is recognized by the segment extending to the midpoint of the part of the line 33 and by half of the part of the fold line 33 adjacent to the hypotenuse.

The angle β ₂ allows the formation of fold lines 57, 58, 59 and the determination of their intersection 61.

Knowing the angles β ₂ , θ, θ ₁ makes it possible to calculate the angle β ₁ formed by the folding lines 57, 58 and the portion of the folding line 33 included between the points 36a, 38a.
[Equation 6]
β ₁ = β ₂ + (θ ₁ − θ)

  The angles α and θ allow the fold lines 43, 45 to be designed.

  The intersection of the fold lines 52 and 66 is determined by calculating the angle γ formed by the part 67 of the line 66 and the part of the fold line 31 included between the fold lines 43 and 59.

In particular, the angle γ formed by the fold line 45 and the fold line 43 after the folding of the peak 4 and the panel A is overlaid on all the other panels is a function of the angle θ ₂ .

The angle γ can be calculated by the following equation.
[Equation 7]
γ = {α− (θ ₂ −α)} / 2

Here, the angle θ ₂ can be obtained by the following equation.
[Equation 8]
θ ₂ = 2sin ⁻¹ ((c / 2) / l ₁ )

Therefore, the following equation is obtained to calculate the angle γ.

  Once the angle γ is known, the portion 67 of the fold line 66 can be designed to obtain the intersection between the fold lines 52 and 66. A portion 68 of the fold line 66 is obtained by connecting the intersection point and the intermediate point 61 described above.

  FIG. 8 shows another example of a chevron top package, generally designated 1, which can be obtained by the above-described method by changing the values of the top angle α and the length l of the inclined top wall 10.

  The advantages of the packages 1 and 1 'according to the invention will be made clear in the following description.

  In particular, the formation of the packages 1 and 1 'on the side top walls 18, 19 rotates the panels A, B, C, D, E, F, G of the sheet packaging material 2 as rigid bodies around their respective fold lines. The simple conditioning of what is achieved in this way makes it possible to diversify the size and shape of the chevron top 4 while ensuring proper folding of the packaging material and proper closure of the package.

  Furthermore, due to the fact that the folding of the various parts of the packaging material 2 (panels A, B, C, D, E, F, G) is achieved by rotation and thus does not cause the associated deformations and stresses thereby, the packaging material. The integrity of aluminum, which is certainly less flexible than the other layers, is not violated in the formation stage.

  It will be apparent that changes can be made to the packages 1, 1 'as described and illustrated herein without departing from the scope of the dependent claims.

  In particular, it will be understood that the main portion 3 of the package 1, 1 'included between the edge 21 and the fold lines 31, 33 can have any design shape.

  Further, in each folding allowance portion 46, 47, the portion 68 of the fold lines 65, 66 is at least partially due to two parallel lines each having a short portion concentrated on one line toward the intermediate points 60, 61, respectively. Determined. In this way, the deformation of the packaging material due to the thickness of the stacked panels is reduced in the range of the part 68 of the folding lines 65, 66.

1 is a perspective view of a chevron top package according to the present invention; FIG. It is an expansion perspective view of the upper part of the package of FIG. It is a perspective view of the pillow-shaped pack which comprises the intermediate product which manufactures the package of FIG. It is a different perspective view of the pillow-shaped pack which comprises the intermediate product which manufactures the package of FIG. FIG. 5 is an enlarged perspective view of the upper part of the pillow-type pack of FIGS. 3 and 4 when folded. It is a sheet-like packaging material provided with the folding line for manufacturing the package of FIG. It is an enlarged view of a part of the sheet-like packaging material of FIG. It is a perspective view of the other Example of the Yamagata top part package by Ho group.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Package 2 Packaging material 3 Main part 4 Crest-shaped top part 5 Base wall 6 Front wall 7 Rear wall 8, 9 Side wall 10 Front side inclination top wall 11 Rear side inclination top wall 12 Top side horizontal seal 13, 14 Top side folding allowance 15 side Edge 18, 19 Side top wall 20 Top 21 Edge 22 Edge 23 Longitudinal seal 26 Intermediate pack 28 Base part 29 Upper taper end 30 Folding line pattern 31, 33, 35, 36, 37, 38 Folding line 40 , 42, 43, 44, 45 Folding line 46, 47 Folding allowance part 48, 49 Part 50, 52, 53, 54, 55, 56, 57, 58, 59 Folding line 60, 61 Intermediate point 65, 66 Intermittent folding line 67,68 pieces

Claims (11)

  A front and rear inclined top wall (10, 11) manufactured by folding and sealing the sheet-like packaging material (2) and joined together by a top transverse seal (12); And a pair of side top walls (18, 19) connecting the respective side edges (15, 16) of the inclined top walls (10, 11). 18, 19) is determined in advance so as to demarcate the respective panels (46, 47) of the sheet-like packaging material (2) between a number of panels (A, B, C, D, E, F, G). By folding along the folded lines (31, 33, 42, 44, 50, 51, 54, 55, 56, 65; 31, 33, 43, 45, 52, 53, 57, 58, 59, 66) A chevron top package (1, 1 ') for liquid food that is achieved, Panels (A, B, C, D, E, F, G) are rigid bodies, and each fold line (31, 33, 42, 44, 50, 51, 54, 55, 56, 65; 31, 33, 43) , 45, 52, 53, 57, 58, 59, 66) by rotating the fold from a plurality of possible fold lines designed such that the side top wall (18, 19) is shaped by being rotated. The line (31, 33, 42, 44, 50, 5, 1, 54, 55, 56, 65; 31, 33, 43, 45, 52, 53, 57, 58, 59, 66) is determined. A featured Yamagata top package.   Desired folds (31, 33, 42, 44, 50, 51, 54, 55, 56, 65; 31, 33, 43, 45, 52, 53, to form the lateral apical wall (18, 19) 57, 58, 59, 66) formed between opposite opposite edges concentrated on the top transverse seal (12) along at least the respective side top walls (18, 19). And the value of one length (l) of the front and rear inclined top walls (10, 11) along the direction intersecting the top lateral seal (12). The package according to claim 1.   The front and rear inclined top walls having a prismatic body portion (28) and at least one tapered end (29) delimited by a pre-top lateral seal (12) (10, 11) and the opposite laterally projecting top folds designed to be folded outside the package top space available for food to obtain said side top walls (18, 19) ( Package according to claim 1 or 2, characterized in that it is obtained from an intermediate pack (26) with 13,14).   Each of the top side folds (13, 14) has one side surface adjacent to one (10) of the front and rear inclined top walls (10, 11), and the top lateral seal (12). It is characterized by having other side surfaces formed adjacent to the other (11) of the front and rear inclined top walls (10, 11) formed at the respective side end portions (12a, 12b). The package according to claim 3.   A front and rear inclined top wall (10, 11) manufactured by folding and sealing the sheet-like packaging material (2) and joined together by a top transverse seal (12); A chevron crest (4) including a pair of side top walls (18, 19) connecting the respective side edges (15, 16) of the inclined top walls (10, 11), the side top walls (18, 19) pre-determined folding lines (31) defining the boundaries of a number of panels (A, B, C, D, E, F, G) in the respective parts (46, 47) of the sheet-like packaging material (2). 33, 42, 44, 50, 51, 54, 55, 56, 65; 31, 33, 43, 45, 52, 53, 57, 58, 59, 66) The method of determining the dimensions of the mountain-shaped top package (1, 1 ′) Each fold line (31, 33, 42, 44, 50, 51, 54, 55, 56, 65; 31, 33, 43, 45, 52, 53, 57, 58, 59, 66), the fold lines (31, 33, 42, 44, 50, 5, 1, 54, 55, 56, 65; 31, 33, 43, 45, 52, 53, 57, 58, 59, 66).   Position and range of the folding line (31, 33, 42, 44, 50, 5, 1, 54, 55, 56, 65; 31, 33, 43, 45, 52, 53, 57, 58, 59, 66) The desired value of the apex angle (α) formed between opposite opposite edges concentrated on the top lateral seal (12) along the respective side top walls (18, 19); And selecting a value of one length (l) of the front and rear inclined top walls (10, 11) along a direction intersecting the top lateral seal (12). The method according to claim 5. Position and range of the folding line (31, 33, 42, 44, 50, 5, 1, 54, 55, 56, 65; 31, 33, 43, 45, 52, 53, 57, 58, 59, 66) In the portion of the sheet-like packaging material (2) for forming the chevron crest 4 of the package (1, 1 '),
A first lateral fold line (31) delimiting the top lateral seal (12);
A second lateral direction located at a distance from the first lateral fold line (31) equal to the selected length (l) to form a horizontal corner of the chevron top (4) Fold line (33);
A pair of first portions (46; 47) defining the side top walls (18, 19) along with the first and second lateral fold lines (31, 32) and the front and rear inclined top walls. A plurality of longitudinal fold lines (42, 43, 44, 45) defining a boundary between a pair of second parts (48, 49) defining (10, 11), said first part (46; 47) longitudinal fold lines (42, 43, 44, 47) forming respective angles equal to the selected apex angle (α) with respective portions of the second lateral fold line (33) outside of 47). 45. The method of claim 6 including the step of designing 45). The inner fold line is connected to the first lateral fold line (31) at the first lateral fold line (31) with respect to the first portion (46; 47), and the second lateral fold line (33) and the second fold line (33). Designing the inner fold line of the first portion (46; 47), comprising a pair of first inclined fold lines (50, 51; 52, 53) delimiting equilateral triangles The angle formed by each first inclined fold line (50, 51; 52, 53) and a portion of the second lateral fold line defining one side of the isosceles triangle ( β) can be expressed as:

8. The method of claim 7 including calculating c by indicating the width of the package to be formed. Three inclined fold lines (in which the inner fold line extends from the intermediate (60; 61) located in the isosceles triangle to the respective vertex with respect to the first part (46; 47) ( 54, 55, 56; 57, 58, 59), wherein the step of designing said inner fold line comprises said second inclined fold line (54, 55, 56; 57, 58, 59) and each of the first inclined fold lines (50, 51; 52, 53), an angle (β ₂ ) is expressed by the following equation:

Including the step of calculating according to
θ is the angle formed to form between each longitudinal fold line (42, 43, 44, 45) and the first inclined fold line (50, 51; 52, 53) adjacent to it. Θ ₁ denotes the second folding line (42, 43, 44, 45) and the second side defining one side of the isosceles triangle after the folding of the peak (4) is completed. 9. The method according to claim 8, wherein the angle formed with the part of the transverse fold line (33) is shown. The inner fold line extends from the intermediate (60; 61) to the first lateral fold line (31) with respect to the first portion (46; 47) and the first inclined Each of the isosceles triangles intersecting the fold line (50, 51; 52, 53) and forming an angle other than 180 ° between each other by the one of the first inclined fold lines (50; 52) Said method comprising a third inclined fold line (65; 66) divided into first and second portions (67, 68) located outside and inside Performing the first side (67;) of the third inclined fold line (65; 66) and the first side located on the inner side of each of the first parts (46; 47). The angle (γ) formed by the direction fold line (31) is expressed by the following equation, that is,

Including the step of calculating according to
Method according to claim 9, wherein l ₁ indicates the length of the longitudinal fold line (42, 43, 44, 45).   Predetermined fold lines (31, 33, 42, 44, 50, 5, 1, 54, 55, 56, 65; 31, 33, 43 to produce a chevron top package (1, 1 ') for liquid food , 45, 52, 53, 57, 58, 59, 66), and the sheet-like packaging material (2) that is bent and sealed along the fold line (31, 33, 42, 44). , 50, 5, 1, 54, 55, 56, 65; 31, 33, 43, 45, 52, 53, 57, 58, 59, 66) according to any one of claims 5 to 10 A sheet-like packaging material characterized in that it can be dimensioned by the described method.

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