Abstract
A device for shaping the gable surfaces of packages with a slanted gable is shown and described, including: a conveyor system with cells fixed to it to receive the packages, at least one gable folder to fold a fin seam in the gable region of the packages and at least two ear folders to fold ears in the gable region of the packages. In order to enable rapid and reliable shaping of the gable even in packages with slanted gables, it is proposed that both the gable folder and the ear folders be mounted movably relative to the conveyor system and the packages to be transported therewith. A method for shaping the gable surfaces of packages with a slanted gable is also shown and described.
Claims
1. A device for the shaping of gable surfaces of packages with a slanted gable, comprising: a conveyor system comprising cells for receiving the packages, at least one gable folder for folding a fin seam in a gable region of the packages, at least two ear folders for folding ears in the gable region of the packages, wherein both the gable folder and the ear folders are mounted movably relative to the conveyor system and the packages transported by said conveyor system, and the at least one gable folder is mounted movably in one plane and has at least a two-dimensional mobility, and wherein the at least one gable folder is mounted movably such that it can fold the fin seam in the gable region of the packages forward in the direction of transport of the packages.
2. The device according to claim 1, wherein the at least one gable folder is mounted movably in a plane formed by the direction of transport and the vertical direction of the packages.
3. The device according to claim 1, wherein the at least two ear folders are mounted movably in a plane formed by the vertical direction and the transverse direction of the packages.
4. The device according to claim 1, wherein the at least one gable folder is arranged between the at least two ear folders.
5. The device according to claim 1, comprising at least two gable folders for folding a fin seam in the gable region of the packages, and at least four ear folders for folding ears in the gable region of the packages, wherein one gable folder and two ear folders form a unit for processing a package in each case.
6. The device according to claim 5, wherein all of the gable folders are adjacent to one another and connected to one another, and in that all ear folders are adjacent to one another and connected to one another.
7. A method for the shaping gable surfaces of packages with a slanted gable, comprising: providing packages comprising gables that can be slanted, folding of a fin seam in a gable region of the packages forward in the direction of transport by means of a gable folder, and folding at least one ear in the gable region of the package by means of two ear folders, wherein both the gable folder and the ear folders are moved relative to a conveyor system and the packages are transported using said conveyor system, and wherein at least one of the following is provided: the fin seam on the slanted gable is arranged transverse to the direction of transport of the packages, or the slanted gables rise in the direction of transport of the package.
8. The method according to claim 7, wherein the conveyor system comprises fixed cells.
9. The method according to claim 7, wherein the packages are moved intermittently.
10. The method according to claim 7, wherein the packages are still during the folding of the fin seams and the folding of the ears.
11. The method according to claim 7, wherein the folding of the fin seams is carried out before the folding of the ears.
12. The method according to claim 7, wherein there is an overlap in terms of the time at which the folding of the fin seams and the folding of the ears are carried out.
13. The method according to claim 7, wherein the gable folder moves the fin seam in the gable region of the packages in the direction of transport of the packages.
14. The method according to claim 7, wherein the gable surfaces of at least two packages are shaped simultaneously.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) The invention is explained in greater detail below by means of drawings which merely depict embodiments, in which:
(2) FIG. 1A: shows a blank used to fold a package sleeve,
(3) FIG. 1B: is a front view of a package sleeve which is formed from the blank shown in FIG. 1A when folded flat,
(4) FIG. 1C: is a rear view of the package sleeve from FIG. 1B,
(5) FIG. 1D: shows the package sleeve from FIG. 1B and FIG. 1C in its unfolded state,
(6) FIG. 1E: shows the package sleeve from FIG. 1B to FIG. 1D with the base sealed,
(7) FIG. 1F: shows the package sleeve from FIG. 1B to FIG. 1E with pre-folded gable surfaces,
(8) FIG. 1G: shows a package manufactured from the package sleeve shown in FIG. 1B to FIG. 1F with an unshaped gable,
(9) FIG. 1H: shows the package from FIG. 1G with a shaped gable,
(10) FIG. 2: is a lateral view of a system for the filling and sealing of packages,
(11) FIG. 3A: is a lateral view of a device 24 for shaping the gable surfaces of packages with a slanted gable in accordance with the invention in an open position,
(12) FIG. 3B: is a front view of the device from FIG. 3A,
(13) FIG. 3C: is a lateral view of a device 24 for the shaping of gable surfaces of packages with slanted gables in accordance with the invention in a half closed position,
(14) FIG. 3D: is a front view of the device from FIG. 3C,
(15) FIG. 3E: is a lateral view of a device 24 for the shaping of gable surfaces of packages with a slanted gable in accordance with the invention in a closed position and
(16) FIG. 3F: is a front view of the device from FIG. 3E.
DESCRIPTION OF THE INVENTION
(17) FIG. 1A shows a blank 1 for the folding of a package sleeve. The blank 1 can comprise several layers of different materials, for example paper, cardboard, plastic or metal, in particular aluminium. The blank 1 has several folding lines 2, the purpose of which is to facilitate the folding of the blank 1 and which divide the blank 1 into several surfaces. The blank 1 can be subdivided into a sleeve surface 3, base surface 4, gable surface 5 and sealing surface 6. The base surfaces 4 and the gable surfaces 5 each comprise rectangular surfaces 7, 7B, 7G and triangular surfaces 8. The gable surfaces 5 also comprise a centrally arranged main gable surface 9. With the exception of the sealing surface 6, the sleeve surface 3 extends over the entire width of the blank 1. A package sleeve can be formed from the blank 1 by the blank 1 being folded such that the sealing surface 6 is joined to the opposite end of the sleeve surface 3, in particular this is fused.
(18) The blank 1 shown in FIG. 1A has two apparent folding lines 10 in the region of the sleeve surface 3. Both of the apparent folding lines 10 run in parallel to one another and through a contact point SB of three adjacent triangular surfaces 8 of the base surface 4 and through a contact point SG of three adjacent triangular surfaces 8 of the gable surfaces 5. The sleeve surface 3 is divided into an inner partial region 3A and two outer partial regions 3B by the apparent folding lines 10. The inner partial region 3A is between the two apparent folding lines 10 and the outer partial regions 3B are outside of the two apparent folding lines 10.
(19) While the base surface 4 has a length L4 which is constant over the entire width of the blank 1, the length of the gable surface 5 differs. The gable surface 5 has a decreased length L5.sub.min adjacent to the outer partial regions 3B of the sleeve surface 3. However, adjacent to the inner partial region 3A of the sleeve surface 3 (in other words in the region of the main gable surface 9), the gable surface 5 has an increased length L5.sub.max. This design means that the inner partial region 3A is lower than the outer partial region 3B. This results in an inclined, slanted gable region which slopes in a forward direction for the packages to be manufactured.
(20) The rectangular surfaces 7B in the base region of the blank are rectangular. Both of the external rectangular surfaces 7G in the gable region of the blank are also rectangular. The central main gable surface 9, however, is not precisely rectangular; rather it is formed with a front edge 11 which is curved in a convex manner at least in sections. In the upper corner regions of the main gable surface 9 it is possible to recognise two curved stamped lines 12 which give the main gable surface 9 a shape reminiscent of an ellipse. A circle-shaped tear line S is shown in the centre within the main gable surface 9. This is preferably a circular recess in the carrier material which is overstretched with the remaining plastic and where applicable aluminium layers of the composite material forming what is known as a “coated hole”. The diameter of this can be adapted to the size of the cutting element of a pouring element to be applied there or can be designed to be relatively small to enable a straw to penetrate this.
(21) The base surfaces 4 have two corner points E4 and the gable surfaces 5 have two corner points E5. The corner points E4, E5 are corner points of the package to be manufactured from the blank 1. Each corner point E4 of a base surface 4 is allocated a corresponding corner point E5 of a gable surface 5 which is in each case the corner point E5 which is arranged above this corner point E4 when the packages is standing up. A folding line 2′ runs through two corresponding corner points E4, E5 in each case and is used to form a rear (vertical) edge of the package to be manufactured. However, there are only two continuous folding lines 2′ in the blank 1 shown in FIG. 1A, as there are for the package sleeve manufactured from this and the packages manufactured from this. However, no folding lines are provided between the further corner points of the base surfaces 4 and the corresponding corner points of the gable surfaces 5, in other words on the front sleeve surface 3A.
(22) FIG. 1B is a front view of package sleeve 13 which is formed from the blank 1 shown in FIG. 1A when folded flat. The regions of the package sleeve already described in connection with FIG. 1A are labelled accordingly in FIG. 1B. The package sleeve 13 is created from the blank 1 in two steps: The blank 1 is initially folded along the two apparent folding lines 10. The two partial areas 3B (left) and 3B (right) of the sleeve surface 3 are then joined together in the region of the sealing surface 6, in particular they are fused, resulting in a longitudinal seam 14 (hidden in FIG. 1B). The package sleeve 1 therefore has a structure which is sealed in a circumferential direction with an opening in the region of the base surfaces 4 and with an opening in the region of the gable surfaces 5. The inner partial region 3A of the sleeve surface 3 is visible in the front view, both sides of which are delimited by the apparent folding lines 10. The remaining partial regions 3B of the sleeve surface 3 are on the back of the package sleeve 13 and therefore hidden in FIG. 1B.
(23) FIG. 1C is a rear view of the package sleeve 13 from FIG. 1B. The regions of the package sleeve already described in connection with FIG. 1A and FIG. 1B are labelled accordingly in FIG. 1C. Both of the external partial regions 3B of the sleeve surface 3 are visible in the rear view. They are joined together by means of the longitudinal seam 14 and are delimited on both sides by the apparent folding lines 10. The front partial region 3A of the sleeve surface 3 is on the front of the package sleeve 13 and therefore hidden in FIG. 1C.
(24) FIG. 1D shows the package sleeve 13 from FIG. 1B and FIG. 1C in its unfolded state. The regions of the package sleeve already described in connection with FIG. 1A to FIG. 1C are labelled accordingly in FIG. 1D. The unfolded state is achieved by folding the package sleeve 13 back along the apparent folding lines 10 which run through the sleeve surface 3. It is folded back approximately 180°. This folding back along the apparent folding lines 10 results in the two partial areas 3A, 3B of the sleeve surface 3 adjacent to the apparent folding lines 10 no longer lying flat on top of one another but rather being arranged in the same plane. The package sleeve 13 is therefore only folded along the apparent folding lines 10 when it is flat (FIG. 1B, FIG. 1C); when it is unfolded (FIG. 1D), however, the package sleeve 13 (and the package to be manufactured from this) is no longer folded along the apparent folding lines 10. This is why they are called “apparent” folding lines 10.
(25) FIG. 1E shows the package sleeve from FIG. 1B to FIG. 1D with the base sealed. The regions of the package sleeves already described in connection with FIG. 1A to FIG. 1D are labelled accordingly in FIG. 1D. The base can for example be sealed while the unfolded package sleeve 13 is pushed onto a mandrel on a mandrel wheel. In order to seal the base, the lower triangular surfaces 8 are for example firstly folded inwards before the lower rectangular surfaces 7B are folded inwards. The folded surfaces are then fused by means of pressure and temperature.
(26) FIG. 1F shows the package sleeve from FIG. 1B to FIG. 1E with pre-folded gable surfaces. The regions of the package sleeve already described in connection with FIG. 1A to FIG. 1E are labelled accordingly in FIG. 1F. “Pre-folded state” means a state in which the two folding lines 2 in the region of the gable surfaces 5 have been pre-folded. The rectangular surfaces 7G and the main gable surface 9 are folded inwards during the pre-folding and later form the gable of the packages. The triangular surfaces 8, however, are folded outwards during the pre-folding and form protruding areas of excess material which are also known as “ears” 15 and are placed on the sleeve surface 3 of the package in a later manufacturing step, for example by means of an adhesive process.
(27) FIG. 1G shows a package 16 manufactured from the package sleeve 13 shown in FIG. 1B to FIG. 1F with an unshaped gable. The regions of the packages already described in connection with FIG. 1A to FIG. 1F are labelled accordingly in FIG. 1G. The package 16 is shown after fusing, in other words once it has been filled and sealed. An enlarged main gable surface 9 is generated as a result the enlarged length L5.sub.max of the main gable surface 9 in the region adjacent to the inner partial region 3A of the sleeve surface 3 and the decreased length L5.sub.min of the gable surface 5 in the region adjacent to the outer partial areas 3B of the sleeve surface 3. The package 16 can be provided with a pouring element on this main gable surface 9 which stretches until almost the front edge 11 which is arched forwards. A fin seam 17 is generated in the region of the gable surfaces 5 after sealing. In FIG. 1G the ears 15 and the fin seam 17 both protrude. The ears 15 are applied in a subsequent manufacturing step, for example by means of an adhesive process, resulting in the fin seam 17 automatically remaining in a flat position.
(28) FIG. 1H shows the package 16 from FIG. 1G with the shaped gable, in particular with the ears 15 applied. The regions of the packages already described in connection with FIG. 1A to FIG. 2G are labelled accordingly in FIG. 1H. In addition to the ears 15, the fin seam 17 is also applied to the packages 16. The upper ears 15 arranged in the region of the gable surface 5 are folded down and applied flat to the sleeve surface 3. The ears 15 are preferably attached to the sleeve surface 3 by means of adhesion or fusion. The package 16 shown in FIG. 1H does not have any folding edges in the region of the front sleeve surface 3A. The front side of the package which is curved forwards can clearly be recognised in the horizontal section through plane E of the packages shown on the right. The straight folding lines 2′ on the rear edges of the packages run from the lower corner points E4 to the upper corner points E5.
(29) FIG. 2 is a lateral view of a system 18 for the filling and sealing of packages. The system 18 comprises a circumferential conveyor system 19 with cells 20 fixed to it to receive package sleeves 13. The package sleeves 13 are inserted into the cells 20 as shown in FIG. 1E, in other words with the base surfaces already sealed. The system 18 comprises a device 21 for the pre-folding of the gable surfaces, a device 22 for the filling of the package sleeves, a device 23 for the sealing of the package sleeves and a device 24 for the shaping of the gables of the packages 16. The gable surfaces are pre-folded in the manner described above in the device 21 for the pre-folding of the gable surfaces with the package sleeves 13 taking the shape shown in FIG. 1F. The package sleeves 13 are filled with the contents in the device 22 for filling the package sleeves. The package sleeves 13 are then sealed in the device 23 for sealing the package sleeves, taking the shape shown in FIG. 1G. After sealing the package sleeves 13 are then called packages 16. The packages 16 are then processed in the device 24 for shaping the gables of the packages such that they take the shape shown in FIG. 1H. The processing comprises the movement of the fin seam 17 and the application of the ears 15. The packages 16 are then removed from the cells 20 of the conveyor system 19.
(30) FIG. 3A is a lateral view of a device 24 in accordance with the invention for shaping the gable surfaces of packages with a slanted gable in an open position. FIG. 3B is a front view of the device 24 from FIG. 3A. The device 24 comprises three folding tools: one gable folder 25 arranged in a central location and two ear folders 26A, 26B arranged adjacent to this. The gable folder 25 is mounted in a mobile manner and is used to move the fin seam 17. The two ear folders 26A, 26B are also mounted in a mobile manner and are used to move the two ears 15. The mobile mounting of the gable folder 25 has the advantage that the fin seam 17 can easily be reached although it can be arranged lower than the highest edge of the package 16. The gable folder 25 is mounted such that it can be moved in a plane which is formed by the longitudinal direction corresponding to the direction of transport of the packages 16 (shown as the X direction in FIG. 3A to FIG. 3F) and the vertical direction (shown as the Y direction in FIG. 3A to FIG. 3F). The two ear folders 26A, 26B, however, are mounted such that they can be moved in a plane formed by the transverse direction (shown as the Z direction in FIG. 3A to FIG. 3F) and the vertical direction (shown as the Y direction in FIG. 3A to FIG. 3F) of the packages 16. The direction of movement of the folding tools 25, 26A, 26B is shown schematically using double arrows. The (open) position of the folding tools shown in FIG. 3A and FIG. 3B is characterised in that none of the folding tools comes into contact with the package 16 and in that the package 16 can be moved between the folding tools in a direction of transport T without any collisions.
(31) FIG. 3C is a lateral view of a device 24 in accordance with the invention for shaping the gable surfaces of packages with a slanted gable in a half closed position. FIG. 3D is a front view of the device 24 from FIG. 3C. The regions of the device already described in connection with FIG. 1A to FIG. 3B are labelled accordingly in FIG. 3C and FIG. 3D. The (closed) position of the folding tools shown in FIG. 3C and FIG. 3D is characterised in that the gable folder 25 is pivoted in a downward direction, thereby moving the fin seam 17 in the direction of transport T. The two ear folders 26A, 26B, however, have not yet been moved and take up the same position as in FIG. 3A and FIG. 3B.
(32) FIG. 3E is a lateral view of a device 24 in accordance with the invention for shaping the gable surfaces of packages with a slanted gable in a closed position. Finally, FIG. 3F is a front view of the device 24 from FIG. 3E. The regions of the device already described in connection with FIG. 1A to FIG. 3D are labelled accordingly in FIG. 3E and FIG. 3F. The (closed) position of the folding tools shown in FIG. 3E and FIG. 3F is characterised in that both the gable folder 25 and the two ear folders 26A, 26B are pivoted in a downwards direction. The gable folder 25 has moved the fin seam 17 in the direction of transport T and the two ear folders 26A, 26B have folded the ears 15 in a downward direction and applied them to the sleeve surface 3 of the package 16.
LIST OF REFERENCE NUMERALS
(33) 1: Blank 2, 2′: Folding line 3: Sleeve surface 3A, 3B: Partial region (of the sleeve surface 3) 4: Base surface 5: Gable surface 6: Sealing surface 7, 7B, 7G: Rectangular surface 8: Triangular surface 9: Main gable surface 10: Apparent folding line 11: Front edge 12: Stamped line 13: Package sleeve 14: Longitudinal seam 15: Ear 16: Package 17: Fin seam 18: System 19: Conveyor system 20: Cell 21: Device for pre-folding 22: Device for filling 23: Device for sealing 24: Device for gable shaping 25: Gable folder 26A, 26B: Ear folder E4: Corner point (of base surface 4) E5: Corner point (of gable surface 5) L4: Length (of base surface 4) L5.sub.min: minimum length (of gable surface 5) L5.sub.max: maximum length (of gable surface 5) S: Tear line SB: Contact point (of base surface 4) SG: Contact point (of gable surface 5) T: Direction of transport X: Longitudinal direction Y: Vertical direction Z: Transverse direction
