Abstract
The invention relates to a receptacle (10), in particular a flexible bag (10) made of paper, with a front part (20), a back part (30) and a bottom (50), which is closed by a bottom unit, and with an opening (1) lying opposite the bottom (50), wherein the bottom unit has a bottom portion (120) of the front part (20) and a bottom portion (130) of the back part (30), the bottom portion (130) of the back part (30) is shorter than the bottom portion (120) of the front part (20), such that the bottom portion (120) of the front part (20) is secured directly on the back part (30) by turning the bottom unit (100) back along a fold line (101), and the opening (1) is formed by a peripheral edge (2) which extends at a height of the front part (20) and of the back part (30) and which is at least partially frayed, thereby reducing the danger of injury at the edge (2).
Claims
1. A device (80) for producing receptacles (10) comprising flexible bags (10) made of paper, wherein the receptacle (10) is realized with a front part (20), a rear part (30), a bottom (50) which is closed by a bottom unit, as well as an opening (1) which is located opposite the bottom (50) and is defined by a peripheral edge (2) which is frayed at least in part, wherein the edge is formed by a front part edge (23) of the front part (20) and a rear part edge (33) of the rear part (30), wherein the device (80) comprises the following features: a perforation device (81) for creating perforation lines (60, 70) on a material web (11), wherein the perforation lines (60, 70) can be created substantially transversely with respect to the conveying direction of the material web (11), a tube forming device (92) for forming a tube (12) from the material web (11), a separating device (82) for separating off individual tube portions (13) and/or material portions (14) of tube portions (13) on the perforation lines (60, 70), a bottom folding device (83) for forming a bottom (50) on an end (13a) of the tube portion (13), characterized in that the perforation device (81) is realized in such a manner that a first perforation line (60) can be introduced to create the bottom (50) and a second perforation line (70), which is at a spacing from the first perforation line (60), can be introduced for creating the frayed peripheral edge (2), wherein the front part edge (23) and the rear part edge (33) are at one height.
2. The device (80) as claimed in claim 1, characterized in that the separating device (82) comprises a first (82a) and a second separating station (82b), wherein in the first separating station (82a) individual tube portions (13) can be separated off along the first perforation line (60), and in the second separating station (82b) material portions (14) of tube portions (13) can be separated off along the second perforation line (70), wherein in particular in that the first separating station (82a) is arranged upstream of the bottom folding device (83) and the second separating station (82b) is arranged downstream of the bottom folding device (83).
3. The device (80) as claimed in claim 1, characterized in that a punching device (84) is provided which punches a handle opening (4) at the same time in the front part (20) and the rear part (30), wherein the punching device (84) is incorporated in the tube forming device (82) or is arranged downstream of the tube forming device (82).
4. The device (80) as claimed in claim 1, characterized in that the perforation device (81) comprises at least one strip element (85) which is realized with several receiving means (86) in which cutting elements (87) which serve for introducing the perforation lines (60, 70) onto the material web (11) are held, wherein in particular in that the strip element (85) is fastened on a rotating shaft (88) of the perforation device (81), wherein in particular the outside region (91) of the strip element (85), on which the cutting elements (87) operate, comprises the geometric contour of a segment of a circle.
5. The device (80) as claimed in claim 4, characterized in that the strip element (85) comprises clamping elements (89) which hold the cutting elements (87) in a clamping manner and/or in that holding means (90) are arranged in the strip element (85) which enable simple interchangeability of the cutting elements (87).
6. The device (80) as claimed in claim 1, characterized in producing the receptacle (10), wherein the bottom unit comprises a bottom portion (120) of the front part (20) and a bottom portion (130) of the rear part (30), the bottom portion (130) of the rear part (30) is realized in a shortened manner in relation to the bottom portion (120) of the front part (20) such that the bottom portion (120) of the front part (20) is fastened directly on the rear part (30) as a result of turning the bottom unit (100) along a fold line (101), the opening (1) is formed by the peripheral edge (2) which extends at a height of the front part (20) and of the rear part (30) and which is frayed at least in part, as a result of which the risk of injury on the edge (2) is reduced.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0045] Further advantages, features and details of the invention are produced from the following description in which, with reference to the drawings, several exemplary embodiment of the invention are described in detail. In this case, the features mentioned in the claims and in the description can be fundamental to the invention in each case on their own or in arbitrary combination. The drawings are as follows:
[0046] FIG. 1 shows a first possible device for producing receptacles according to the invention,
[0047] FIG. 2 shows a further exemplary embodiment of a device according to the invention for producing receptacles,
[0048] FIG. 3 shows a top view of a material web which is provided with perforations or perforation lines,
[0049] FIG. 4 shows a top view of a tube portion that has been singled out,
[0050] FIG. 5 shows a top view of a completed receptacle,
[0051] FIG. 6 shows a further exemplary embodiment of a top view of a tube portion which has been singled out,
[0052] FIG. 7 shows a top view of a completed receptacle,
[0053] FIG. 8 shows a purely schematic view of a strip element which is a component part of a perforation device of the device according to the invention for producing receptacles,
[0054] FIG. 9 shows the strip element according to FIG. 8 in a further state and
[0055] FIG. 10 shows a sectional view according to the line of intersection A-A from FIG. 8.
DETAILED DESCRIPTION OF SPECIFIC EMBODIMENTS
[0056] FIGS. 1 and 2 show two possible devices 80 for producing receptacles 10 which are shown as an example in FIG. 5 or in FIG. 7. Said receptacles 10, in the present exemplary embodiment, are flexible bags 10 made of paper. FIGS. 1 and 2 simply show the essential components of said device 80 in a schematic manner. The device 80 includes an unwinding device 93 to which is supplied a material web 11 in the form of a winding. Proceeding from said unwinding device 93, the web 11 is supplied to a perforation device 81 via guide rollers which are not provided explicitly with references. The perforation device 81 includes several transverse perforating blades which serve a cutting elements 87 in order to provide the material web 11 with perforations 60, 70. In this connection, the cutting elements 87 are shown explicitly in FIG. 8, more details thereof being given below. The perforation lines 60, 70, which extend transversely with respect to the conveying direction Z of the material web 11, are shown schematically in FIG. 3. The perforation line 60, 70, in this connection, do not cut through the web 11 but bring about a weakening along the perforation lines 60, 70, along which individual regions of the outer web 11 are subsequently torn off or singled out. Said singling out takes place in a separating device 82, more details thereof being given below.
[0057] Once then the material web 11 has been provided with the perforation lines 60, 70 according to FIG. 3, the material web 11 leaves the right-hand part region of the device 80 and is supplied to tube forming device 92 in which the material web 11 is formed into a tube 12 according to FIG. 4 or FIG. 6. This is effected, for example, by way of guide plates which are knocked in at the side such that the edges 34a, 34b or the defining sides 34a, 34b of the material web 11 then overlap. This is particularly clear in FIG. 4 and FIG. 6 as there is a spacing between the edges 34a and 34b. The edge 34b lies beneath the edge 34a, a suitable adhesive being glued for longitudinal adhesion between said two edges 34a, 34b. The folding is effected along the fold lines 102 and 103.
[0058] Said formed tube 12 leaves the tube forming device 92, the tube 12 still being an endless tube 12 in said stage. The tube 12 is then supplied to a separating device 82 which separates the tube 12 according to the perforation lines 60, 70. According to FIG. 1, the separating device 82 comprise a first 82a and a second 82b separating station. Said two separating stations 82a, 82b are connected directly one behind another in FIG. 1.
[0059] Behind the second separating station 82b is situated a bottom folding device 83, more details of which will follow below. Contrary to this, the bottom folding device 83 in FIG. 2 is arranged between the first 82a and the second separating station 82b. According to FIG. 1 and FIG. 2, the first separating station 82a separates the tube 12 into individual tube portions 13 along the first perforation line 60. The second separating station 82b separates material portions 14 of the tube portions 13 along the second perforation line 70.
[0060] According to FIG. 5 and FIG. 7, a receptacle 10 is created with a front part 20, a rear part 30 and a bottom 50 which is closed by a bottom unit 120, 130. Said bottom unit comprises a bottom portion 120 of the front part 20 and a bottom portion 130 of the rear part 30 which is shown in FIG. 4 and in FIG. 6. The bottom portion 130 of the rear part 30 is realized in a shortened manner in relation to the bottom portion 120 of the front part 20 such that the bottom portion 120 of the front part 20 is fastened, in particular is glued, directly on the rear part 30 as result of folding the bottom unit along a folding line 101, which is effected in the bottom folding device 83.
[0061] The receptacle 10 comprises an opening 1 which is located opposite the bottom 50, is formed by a peripheral edge 2 and is frayed on account of the perforation line 70, as a result of which the risk of injury on the edge 2 is reduced. According to FIG. 5 and FIG. 7, the edge 2 is realized at least in part in the manner of a perforation which can be felt by the user.
[0062] The bottom portion 130 of the rear part 30 and the bottom portion 120 of the front part 20 also comprise a frayed edge 123, 133.
[0063] According to FIG. 4 and FIG. 6, it is shown as an example that at least one side folding 3 can be provided between the front part 20 and the rear part 30. It can also be provided that the front part 20 and/or the rear part 30 can also be realized at least in part from a transparent material.
[0064] By means of a broken line, FIG. 5 and FIG. 7 show in each case a handle opening 4 which is realized on the front part 20 and on the rear part 30. Said handle opening 4 is punched out, it being possible to provide a punching device 84 for this purpose which can be arranged, for example, in the tube forming device 92 or downstream of the tube forming device 92, which is shown schematically in FIG. 1 and FIG. 2.
[0065] So that the handle opening 4 obtains greater stability, the receptacle 10 according to FIG. 5 and according to FIG. 7 comprises a reinforcement strip 5 in the region of the handle opening 4. The reinforcement strips 5 are glued in the region of the handle opening 4 on the inside 22 of the front part as well as on the inside 32 of the rear part 30. In an expedient manner, said reinforcement strips 5 are attached to the material web 11 or to the tube 12 upstream of the punching device 84 inside the device 80.
[0066] The outside surface 121 of the bottom portion 120 of the front part 20 can serve as an information field or information surface which is indicated schematically in FIG. 5 and in FIG. 7.
[0067] According to FIG. 4 and FIG. 6, the front part 20 comprises an outside 21 and an inside 22. The rear part 30, in contrast, comprises an outside 31 and an inside 32, the inside 32 being shown in FIG. 3 according to the material web 11. The inside 22 of the front part 20 faces the inside 32 of the rear part 30, the bottom portion 120 of the front part 20 comprising an inside surface 122 and an outside surface 121. The bottom portion 130 of the rear part 30 is realized with an inside surface 132 and an outside surface 131 which can also be seen in FIG. 3. According to FIG. 5 and FIG. 7, the inside surface 122 of the bottom portion 120 of the front part 20 is glued to the rear part 30.
[0068] The edge 2 of the opening 1 is formed by a front part edge 23 of the front part 20 and a rear part edge 33 of the rear part 30 which is shown in FIG. 3 within the material web 11. In FIG. 5 and in FIG. 7, the front part edge 23 and the rear part edge 33 are at one height. This is brought about in that a straight perforation line 70 is introduced in the material web 11.
[0069] According to FIG. 1 and FIG. 2, the following steps are provided in the method according to the invention for producing receptacles 10: [0070] A) create perforation lines 60, 70 on a material web 11 by means of a perforation device 81, wherein the perforation lines 60, 70 extend substantially transversely relative to the conveying direction Z of the material web 11, [0071] B) form a tube 12 from the material web 11 by means of a tube forming device 92, [0072] C) separate off individual tube portions 13 and/or material portions 14 of tube portions 13 on the perforation lines 60, 70 by means of a separating device 82, [0073] D) form a bottom 50 on one end 13A of the tube portion 13, wherein in step A) the perforation device 81 forms a first perforation line 60 for creating the bottom 50 and a second perforation line 70, which is at a spacing from the first perforation line 60, for creating a frayed edge 2, wherein the front part edge 23 and the rear part edge 33 are at one height.
[0074] In this connection, the first perforation line 60 comprises at least two regions 61, 62 which extend offset, at a spacing from and parallel to one another, which is shown in FIG. 3. The first perforation line 60 consequently extends substantially transversely with respect to the conveying direction Z of the material web 11. The second perforation line 70 is realized as a geometric straight line. The first perforation line 60 is realized in a ramp-shaped manner and has a defined contour. The first region 61 of the first perforation line 60 is at a spacing X to the adjacent second perforation line 70 which lies approximately within the range of between 1 mm17 mm. The second region 62 of the first perforation line 60 is at a greater spacing Y to the adjacent second perforation line 70 than the spacing X which exists between the first region 61 of the first perforation line 60 and the adjacent second perforation line 70. The difference between Y and X can be 20 mm in one exemplary embodiment. Said geometric development is dependent on the geometric forms of the receptacles. With regard to the separating device 82, it must be mentioned in this context that the separating device 82 can operate in said smaller region X and/or Y in order to be able to carry out online a separating process along the perforation line 70 and/or 60.
[0075] The above-mentioned steps A) to D) can be carried out in a sequential manner. It is equally conceivable for the steps to be able to overlap at least in part in a further exemplary embodiment. As FIG. 2 makes clear, it is conceivable for the separating device 82 with its first separating station 82a to be arranged upstream of the bottom folding device 83 and the second separating station 82b to be placed downstream of the bottom folding device 83.
[0076] The strip element 85, which is mounted on the shaft 88 according to FIG. 1 and FIG. 2, is shown in FIG. 8 to FIG. 10. For example, it is conceivable to provide two or a plurality of strip elements 85 on the perforation device 81 such that a corresponding perforation with the perforation lines 60, 70 can be carried out. The strip element 85 comprises two receiving means 86 which are realized in a groove-shaped manner. Cutting elements 87a, 87b, 87c and 87d are arranged in the receiving means 86. The cutting element 87d is responsible for the perforation line 70 according to FIG. 3. Five further cutters 78a, 78b, 78c, which are responsible for the perforation line 60, are arranged above the cutter 87d.
[0077] As is indicated in FIG. 8 and FIG. 10, the outside region 91 of the strip element 85 comprises in cross section the contour of a segment of a circle. The cutting elements 87 project out of the outside region 91 of the strip element 85, which is shown in FIG. 10. The strip element 85 comprises clamping elements 89 which hold the cutting elements 87 in a clamping manner. In addition, two holding means 90 are realized each with two elongated holes 90a which bring about the clamping connection between the clamping elements 89 and the cutting elements 87. If, then, the contour of the cutting elements 87 is to be modified, the holding means 90 can be released by the screw elements in the elongated holes 90a being unscrewed. The cutting elements 87a, 87b, 87c and the clamping elements 89a, 89b, and 89c can then be removed from the strip element 85 such that the situation according to FIG. 9 is set. As is shown in a very clear manner, the strip element 85 comprises a space 96 in which the cutting elements 87a, 87b, 87c and the associated clamping elements 89a, 89b, 89c according to FIG. 8 were inserted beforehand. If it is desired, for example, to shorten the center cutting element 87c, the short cutting elements 87b are pushed toward one another and a corresponding cutting element 87c and two cutting elements 87a are placed into the receiving means 86 or into the space 96 in a modular manner. In addition, clamping elements 89 matching hereto are placed into the space 96 so that a reliable clamping of the cutting elements 87a, 87b and 87c is ensured. The holding means 90 are positioned in a corresponding manner in the space 96 of the strip element 85, the space 96 comprising a plurality of bores 95 in its bottom region so that a reliable and flexible fastening of the holding means 90 is able to be brought about by means of the elongated holes 90a.
[0078] In addition, the strip element 85 includes several openings 94 which serve for fastening the strip element 85 on the rotating shaft 88.
[0079] FIG. 10 additionally shows that the cutters 87a, 87b, 87c are able to be height-adjusted. To this end, the clamping element 89c comprises adjustment openings 98 which are also shown schematically in FIG. 8. An adjustment element 99, which is able to be adjusted by means of a tool, is shown in the adjustment opening 98, as a result of which the height of the cutting elements 87a, 87b, 87c is able to be adjusted. In the present exemplary embodiment, the adjustment element 99 comprises a thread at the side such that by means of a rotation of the adjustment element 99 a height displacement of the cutting elements 87a, 87b, 87c can be brought about. As the height of the clamping element 89c is displaceable, an elongated hole 105 is provided so that no collision with the fastening element 104 takes place. The function of the fastening element 104, which is a threaded pin in the present exemplary embodiment, is to fix the clamping element 89b, 89c and/or the cutting element 87a, 87b, 87c additionally at the side. A fastening element 104, which has the same function, is also arranged on the opposite side on the clamping element 89d.
LIST OF REFERENCES
[0080] 1 Opening [0081] 2 Edge [0082] 3 Side folding [0083] 4 Handle opening [0084] 5 Reinforcement strip [0085] 10 Receptacle, bag [0086] 11 Material web [0087] 12 Tube [0088] 13 Tube portion [0089] 13a End of the tube portion 13 [0090] 14 Material portion [0091] 20 Front part [0092] 21 Outside [0093] 22 Inside [0094] 23 Front part edge [0095] 30 Rear part [0096] 31 Outside [0097] 32 Inside [0098] 33 Rear part edge [0099] 34a Defining side [0100] 34b Defining side [0101] 50 Bottom [0102] 60 Perforation line [0103] 61 First region [0104] 62 Second region [0105] 70 Perforation line [0106] 80 Device, machine [0107] 81 Perforation device [0108] 82 Separating device [0109] 82a First separating station [0110] 82b Second separating station [0111] 83 Bottom folding device [0112] 84 Punching device [0113] 85 Strip element [0114] 86 Receiving means [0115] 87 Cutting element [0116] 88 Shaft [0117] 89 Clamping element [0118] 90 Holding means [0119] 90a Elongated hole [0120] 91 Outside region of 85 [0121] 92 Tube forming device [0122] 93 Unwinding device [0123] 94 Opening [0124] 95 Bore [0125] 96 Space [0126] 97 Fastening element [0127] 98 Adjustment opening [0128] 99 Adjustment element [0129] 101 Fold line [0130] 102 Fold line [0131] 103 Fold line [0132] 104 Fastening element, threaded pin [0133] 105 Elongated hole [0134] 120 Bottom portion [0135] 121 Outside surface [0136] 122 Inside surface [0137] 123 Edge [0138] 130 Bottom portion [0139] 131 Outside surface [0140] 132 Inside surface [0141] 133 Edge
