EP3606835A1 - Mehrlagiger sack - Google Patents
Mehrlagiger sackInfo
- Publication number
- EP3606835A1 EP3606835A1 EP18710375.9A EP18710375A EP3606835A1 EP 3606835 A1 EP3606835 A1 EP 3606835A1 EP 18710375 A EP18710375 A EP 18710375A EP 3606835 A1 EP3606835 A1 EP 3606835A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube piece
- bag
- piece
- inner tube
- outer tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 40
- 239000013590 bulk material Substances 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000004026 adhesive bonding Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 2
- 239000006228 supernatant Substances 0.000 description 16
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000002689 soil Substances 0.000 description 3
- 235000013305 food Nutrition 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 235000009470 Theobroma cacao Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 244000240602 cacao Species 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/04—Bags or like containers made of paper and having structural provision for thickness of contents with multiple walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/02—Feeding or positioning sheets, blanks or webs
- B31B70/10—Feeding or positioning webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
- B31B70/16—Cutting webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/26—Folding sheets, blanks or webs
- B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/08—Bags or like containers made of paper and having structural provision for thickness of contents with block bottoms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/14—Valve bags, i.e. with valves for filling
- B65D31/142—Valve bags, i.e. with valves for filling the filling port being formed by folding a flap connected to a side, e.g. block bottoms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
- B31B2150/003—Flexible containers made from sheets or blanks, e.g. from flattened tubes made from tubular sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2160/00—Shape of flexible containers
- B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2170/00—Construction of flexible containers
- B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2170/00—Construction of flexible containers
- B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
- B31B2170/204—Construction of flexible containers having multi-layered walls, e.g. laminated or lined involving folding a web about an already tubular web
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/74—Auxiliary operations
- B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
- B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
- B31B70/85—Applying patches or flexible valve inserts, e.g. applying film-like valves
Definitions
- the invention relates to a multilayer bag for bulk such.
- cement gypsum, granules, cocoa powder or other powdered food or chemicals.
- Such sacks are generally known and typically formed from two or more layers of a sheet material, preferably paper and / or plastic. They are used in particular for the packaging and distribution of powdered or fine-grained bulk material. Usual sizes are 5 kg, 10 kg and 25 kg.
- a multilayer bag is z. B. in DE 20 2014 000 194 described.
- multi-ply hose pieces comprise a plurality of single-ply hose pieces, which are typically the same length and are interlaced with one another so that their ends are flush with one another.
- Figure 1 a A two-ply paper web section with such flush ends according to the prior art is shown in Figure 1 a, a piece of hose formed therefrom in Figure 1 b. At the ends of the pieces of hose are formed the sack bottoms, z. B. in the form of a cross or block bottom fold.
- Figure 1 a is a Buchgeberfaltung indicated at the top and bottom of the end of the hose piece by dashed fold lines.
- the bottom fold is usually fixed by a suitable bond. Due to the material layers that are flush with one another, bonding of the bottom fold usually results in bonding of the outermost material layer with inner material layers, such as, for example, inner layers of material.
- inner material layers such as, for example, inner layers of material.
- the above-described sacks are increasingly used for bulk or filling material, which is processed under clean room conditions, eg. In the food or pharmaceutical industries.
- filling material there is the need to remove the outer layer of the bag as far as possible shortly before it is introduced into the clean room, without, however, already opening the bag. This is referred to below as stripping or stripping the bag.
- stripping or stripping the bag If necessary, adhering to the outer skin of the bag impurities should be removed before introduction into the clean room, the bag should, however, remain as closed as possible, only to be opened and emptied in the clean room.
- the bag according to the invention should be simple and inexpensive to produce.
- the object is achieved by a bag with the features of claim 1, and a bag with the features of the independent claim 14.
- a method with the features of the independent claim 15 is proposed.
- Advantageous embodiments are the subject of the dependent claims. According to the invention, it is provided that the tube pieces of the individual layers of material do not terminate flush at their ends, but that at least one inner tube piece, hereinafter referred to as inner tube piece, has a projection on at least one end opposite to the outermost piece of tube, hereinafter referred to as outer tube piece. It is therefore provided that at least one inner tube piece projects beyond the outer tube piece at at least one end.
- the supernatant is suitably a few centimeters, preferably at least 1 cm, more preferably at least 2cm, and even more preferably at least 3cm.
- the supernatant is at most 8 cm, more advantageously at most 6 cm and even more advantageously at most 4 cm.
- a bag bottom can be formed in a simple manner, in which the inner tube piece is closed by a bond for closing the bottom, without the outer tube piece is included in this bond. Due to the supernatant of the inner tube piece, bonding of the outer tube piece to the inner tube piece in the bottom area can be avoided and, nevertheless, bonding that closes the floor can be achieved in a simple manner.
- a bond in this sense should also be any similar determination of the closed floor, z. B. a welding or otherwise fixing the closed floor.
- the outer tube piece Since the outer tube piece is not included in the bottom bonding of the inner tube piece or is not glued to the inner tube piece in the area of Bodenverklebung, the outer tube piece can be easily removed from the bottom of the finished or filled bag, without solved the protruding inner tube piece closing bond becomes.
- the invention makes possible a multilayered sack which can be stripped or stripped in a simple manner, ie in which the outer material layer is in a simple manner over a large area - including bottom areas - can be removed from a filled bag, without opening the bag and release the contents.
- the projection of the inner tube piece relative to the outer tube piece is achieved in that the protruding inner tube piece is formed longer than the outer tube piece.
- a projection of an inner tube piece opposite the outer tube piece is formed at both ends of the outer tube piece. Then bottoms can be formed at both ends of the tube piece, which are glued without bonding the outer tube piece with an inner tube piece.
- This makes it possible to design the outer layer in the region of both floors in a simple manner removable, so as to be able to undress or strip a bag with two floors as large as possible.
- This can be realized in a particularly advantageous manner in that an inner tube piece is designed to be longer than the outer tube piece in such a way that it has a projection, advantageously the same length of projection, at both ends of the outer tube piece.
- the bag has two inner tube pieces which are telescopically inserted into one another such that at least one inner tube piece has a projection at one end opposite the end of the outer tube piece.
- the inner tube pieces have the same length as the outer tube piece.
- each of the two inner tube pieces projects beyond this at a different end of the outer tube piece, particularly advantageously over the same length of projection.
- This embodiment is particularly advantageous in terms of manufacturing technology, because a projection can be produced at the same length at both ends using the same length of outer and inner tube pieces.
- more equal or different lengths of inner tube pieces may be present.
- the bag according to the invention has two opposite bottoms which are preferably formed at the ends of the tube pieces in a cross-fold or block bottom fold manner. At least at one bottom, advantageously at both bottoms, an inner tube piece has the supernatant according to the invention, and the tray (s) are closed according to the invention without gluing the inner tube piece to the outer tube piece.
- At least one bottom is additionally reinforced by a cover sheet, which is glued to the outer tube piece and has no adhesion to the inner tube piece.
- a cover sheet which is glued to the outer tube piece and has no adhesion to the inner tube piece.
- the preferred cross or block bottoms have side flaps extending substantially parallel to the longitudinal axis of the floor, as well as corner impacts at the ends of the longitudinal axis of the floor. Such bottoms are typically added by collapsing the overlapping side flaps, and the overlapping side flaps are typically adhered.
- Advantageously, in such bottoms of the supernatant of the inner tube piece according to the invention is designed such that the outer tube piece does not extend into the overlap region of the side flaps.
- an adhesion of the side flaps in the overlapping area without inclusion of the outer tube piece in this bond is particularly well possible, and the outer tube piece forms a frame in the bottom area, which runs along the edges of the finished floor.
- the outer tube piece and / or the bottom cover sheets or at least one tear strip on the outer layer of the bag easily and in a defined manner tear and remove from the bag can.
- the tear strip is formed at least three parts, with two parts of the tear strip extending longitudinally over the two floors and a tear strip between the floors over the side wall of the bag. Further advantageously, the three parts of the tear strip are arranged in a U-shape. As a result, the outer layer of the bag can be torn open and removed particularly well.
- the outer layer of the bag may also have suitable perforation lines and / or creases and / or other suitable means to facilitate tearing open the outer layer and remove it.
- Such perforation lines and / or creases and / or other suitable means are particularly advantageously designed and / or arranged in multiple parts in a similar manner as the tear strips.
- the bag has a bottom formed as a valve bottom into which a valve tube is inserted for filling the bag.
- the valve tube is not glued to the outer tube piece, so that the outer layer can be relatively easily removed without removal of the valve from the bag.
- the closed valve remains on the bag, so that it is closed further. Even if the outer part of the valve had contact with the outer space, the area affected is small in comparison to the total surface of the bag, so that the bag can be very large area undressed, even if the valve tube remains on the bag.
- valve tube is divisible into two pieces of hose z. B. telescopically inserted into each other.
- the divisibility by a circumferential perforation z. B. be made approximately halfway along the valve tube.
- the outer end of the valve tube can be separated without the inner end of the valve tube is removed from the bag or torn out of it.
- the closed inner part of the valve tube can continue to keep the bag closed, while the outer part of the valve tube with the rest of the outer layer of the bag is removable.
- the outer part of the valve tube may also be glued to the outer tube piece, while the inner part of the valve tube is glued to the inner tube piece.
- the bag according to the invention has an inner latch which is inserted into the open floor (s) with a protruding inner tube piece such that the inner latch is adhesively bonded to the inner tube piece and has no adhesion to the outer tube piece.
- This embodiment allows a particularly good sealing of the bottom of the sack with the inner bar, at the same time ensuring the easy removability of the outer layer. Further, it is possible in this embodiment, to close the inner tube piece in the bottom area solely by gluing the inner bar, so that a further bonding of the inner tube piece in the bottom area is not required.
- the added side flaps can be held in the attached position by a cover sheet bonded only to the outer tube piece.
- the inventive multi-layer bag according to claim 14 has two opposite bottoms and an outer layer which is tearable by means of at least one tear strip and / or at least one perforation line and / or other suitable means and extensively removable from the bag without the bag thereby opened and released contents becomes.
- At least one material layer of the bags according to the invention is formed from paper or a paper-like material.
- paper-like materials come z.
- Other material layers of the bags according to the invention can, for. B. be designed as plastic films.
- the inventive method according to claim 15 is based on the previously known use of a tube machine in the bag production.
- material layers of a sheet-like sheet material for example paper and / or plastic film webs, laid one above the other in a tubular machine, cut to suitable length and formed into pieces of hose.
- the multi-layered hose pieces are formed in such a way that at least one inner hose piece projects beyond the outer hose piece at at least one end.
- the supernatant can be produced by making the inner tube piece longer or cut to a greater length than the outer tube piece.
- This can be z. B. be realized in that the material web from which the protruding inner tube piece is formed, runs faster in the tube machine, as the material web from which the outer tube piece is made.
- the bag is produced with at least two inner tube pieces whose length corresponds to the outer tube piece, whereby the outer tube piece and inner tube piece are staggered in the tube machine such that the one inner tube piece towards the outer tube piece in the conveying direction of the web-shaped material forward and the other inner tube piece is shifted backwards.
- the outer tube piece and the two inner tube pieces are brought by staggered cutting of the associated material webs in the aforementioned staggered arrangement.
- trays are formed at the ends of the multi-ply tube pieces in a so-called bottoming machine, preferably in cross or block bottom folds, wherein the inner tube piece is not glued to the outer tube piece when closing or gluing the trays with projection of the inner tube piece ,
- Fig. 1 a / b Flush final paper web sections or hose pieces for bag production according to the prior art
- Fig. 2 The laying of a known from the prior art bag floor
- Fig. 3a A paper web section for a two-ply according to the invention
- Fig. 3b A piece of tubing for a two-ply bag according to the invention
- Fig. 4 A plan view of the open cross bottom of a device according to the invention
- Fig. 5 An oblique view of the partially applied cross bottom of a bag according to the invention
- Fig. 6 The closed cross bottom of a bag according to the invention
- Fig. 7 A paper web section for a three-ply according to the invention
- Fig. 8 The closed bottom of a bag according to the invention with cover sheet
- Fig. 9 An oblique view of a bag according to the invention with tear strip
- Fig. 10 The open valve bottom of a bag according to the invention with glued valve hose
- Fig. 1 1 The open valve bottom of a bag according to the invention with glued, two-piece valve tube
- Fig. 12 The added valve bottom of a bag according to the invention
- Fig. 13 The open cross bottom of a bag according to the invention with inner latch
- Fig. 14 The open cross bottom of a bag according to the invention with valve tube and inner bar
- Fig. 15 A schematic representation of the cutting of paper webs for a two-ply bag according to the invention
- Fig. 16 A schematic representation of the cutting of paper webs for a three-ply bag according to the invention.
- FIG. 1a shows a two-ply paper web section 1 for producing a two-ply paper sack according to the prior art.
- the upper paper layer 3 forms the outer layer of the finished bag, the underlying paper layer 4, the inner layer of the bag wall.
- the right and left edges 5 and 6 of the material layers 3 and 4 are respectively connected to form a tube, which is shown in Figure 1 b.
- the left edge 6 of both material layers 3 and 4 can be seen, while the right edge can only be seen from the material layer 3.
- FIG. 1 b forms a two-lumen tube piece 1 with the outer tube piece 3 and inner tube piece 4, the two paper or tube piece plies 3 and 4 being flush with one another at the ends 7 and 8.
- FIG. 2 shows the laying of the bottom 9 when a cross-bottom bag according to the prior art is formed from the paper web section or hose section 1 according to FIG. 1 a / b.
- the inside of the inner paper layer 4 is characterized by cross-hatching.
- the exterior of the outer tube piece 3 is glued to the inside of the inner tube piece 4 in the bonding of the soil by means of the dotted contour 2 shown dotted. Therefore, the outer layer 3 can not be detached from the bag without loosening the bonding 2 of the soil.
- FIG. 3 a shows a two-ply paper web section 15 for producing a two-ply bag according to the invention.
- the upper paper layer 22 forms the outer layer and the lower paper layer 32 forms the inner layer of the bag.
- a two-ply piece of tubing 15 is formed with the outer tube piece 22 and the inner tube piece 32, as shown schematically in Figure 3b.
- the inner tube piece 32 at its two ends 37 and 38, a projection U relative to the respective end 27 and 28 of the outer tube piece 22, and the outer layer 22 is provided with a tear strip 29.
- the supernatant (U) is between 3cm and 5cm.
- FIG. 4 shows the open cross bottom 50 of a bag according to the invention, which is formed from the two-ply paper web section 15 or hose section 15 shown in FIG.
- Characteristic of the Wienêtfaltung are the Eckeinelle 52 and 53 and the side flaps 55 and 56, which are closed to put the bottom to the sofalzlinien 58 and 59.
- the outer tube piece 22 is provided with a dot / angled pattern in FIG. 4, and the inner tube piece 32 with a crossed hatching.
- Figure 5 shows the laying of the bottom 50 of a bag according to the invention, wherein first the front side flap 56 and then the rear side flap 55 is closed.
- the areas of the inner side of the side flaps alone formed by the inner tube 32 are in the area of the adhesive contour 51 alone on areas of the inner tube piece, so that in the bonding of the added soil inclusion of the outer tube piece 22 is avoided in this bond 51.
- FIG. 6 shows the applied and bonded bottom 50 of a bag according to the invention.
- the outer tube piece 22 forms a frame which extends along the edge of the bottom 50 and leaves in the middle a window in which the overlap of the protruding portion of the side flaps 55 and 56 can be seen.
- the outer tube piece 22 is provided with the tear strip 29 to facilitate the tearing of the outer layer of the bag to the Entmountedsst Shape.
- FIG. 7 shows a three-ply paper web section 15 for a three-ply bag according to the invention, wherein the upper paper ply 22 forms the outer ply of the bag or the outer hose section 22, and the two underlying paper plies 32, 42 form inner layers or inner tube sections 32, 42.
- pieces of tubing are formed from the paper layers 22, 32, 42 by connecting the respective left and right edges 24, 34, 44 and 25, 35, 45 to one another.
- the inner paper layer or the inner tube piece 32 has at its upper end 37 a projection U with respect to the upper end 27 of the outer layer or of the outer tube piece 22.
- the supernatants U are at both En that of the outer tube piece is formed substantially the same size, and all three paper layers or hose pieces 22, 32 and 42 have substantially the same length L between the ends 27, 37, 47 and 28, 38 and 48. Accordingly, the supernatants U are realized in that the paper layers or hose pieces 22, 32, 42 in the direction of the length L, which corresponds to the conveying direction F of the paper web in the tubular machine, are arranged offset to one another.
- the staggered arrangement of the inner paper layers 32 and 42 results in the tube formation that the tube pieces 32 and 42 are telescopically inserted, wherein the telescopic extension corresponds to twice supernatant U, and the two telescopically inserted inner tube pieces are arranged relative to the outer tube piece in that the supernatant U is formed opposite the outer tube piece at its two ends 27 and 28.
- the addition of the bag bottom is as illustrated in Figures 4 to 6, and there is also a tear strip 29 provided in the outer tube piece 22 to more easily tear the outer layer of the bag and remove.
- the embodiment according to FIG. 7 can be realized in a particularly simple manner in terms of production because the paper layers 22, 32 and 42 in the tube machine can be cut to the same length, ie equally long web sections are required for all material layers.
- FIG. 8 shows a sack bottom 50 formed according to the invention, which is additionally reinforced by a cover sheet 60.
- the adhesive contour 61 of the cover sheet is formed such that the cover sheet is glued only to the outer tube piece 22 and the frame formed by it in the region of the bottom. Accordingly, the cover sheet 60 is not adhered to inner tube pieces so that it can be removed from the bag bottom 50 without tearing inner layers with the outer tube piece 22.
- a tear strip 69 is provided next to a tear strip 29 in the outer tube piece.
- Figure 9 shows a bag 17 according to the invention in the filled state with a valve bottom 50 and an opposite bottom 70, wherein both ends of the multi-layered piece of tubing or both bottoms 50, 70 are formed according to the invention, ie with a projection of an inner tube piece relative to the outer tube piece.
- the floors 50, 70 are reinforced with cover sheets 60, each provided with a tear strip 69.
- the outer tube piece 22 is provided with a tear strip 29.
- the arrangement of the tear strip on the bag body forms a U-shaped structure. As a result, the outer layer of the bag can be torn particularly favorable and removed from the bag, without inner layers of the bag are destroyed and the bag is opened.
- FIG. 10 shows an opened bag bottom 50 according to the invention, into which a valve tube 80 is inserted for filling the bag.
- the valve tube 80 is glued by suitable arrangement of the adhesive contour 81 only with the inner tube piece 32.
- the outer layer 22 can be removed from the bag, without the valve is torn out of the remaining bag. After removing the outer layer then remains with the outer end of the valve tube 80, a relatively small area on the rest or undressed bag, which had contact with the outside space.
- the valve tube 80 is divisible, in which the valve tube is formed from an inner and outer section 84, 85, which are telescopically inserted into one another.
- the inner part 84 of the valve tube is glued via the adhesive contour 81 with the inner tube piece, and the outer part 85 of the valve tube 80 via the adhesive contour 82 with the outer tube piece. Due to the divisibility of the valve tube 80, it is possible to remove the outer part of the valve 85 with the outer layer of the bag, the inner tube 84 remains due to the advantageously stronger bond 81 on the remaining bag.
- the valve closure is arranged in the inner part 84 of the valve, so that the valve remains closed even after removal of the outer part 85.
- FIG. 12 shows a closed valve base 50, designed according to the invention, into which a valve tube 80 is inserted.
- the valve tube 80 is in the left area in contact with the outer space, so that with the removal of this outer part which is in contact with the outer space surface of the bag can be removed even larger area.
- the valve bottom 50 shown in FIG. 12 may be reinforced by a cover sheet 60 in the manner illustrated in FIG.
- FIG. 13 shows an unfolded floor 50 according to the invention, which is additionally covered by an inner bar 90. Due to the circumferential adhesive contour 91 of the inner bar is peripherally bonded to the inner tube piece, so that on the one hand a particularly good sealing of the bag is achieved with the inner bar, and on the other hand, a bonding of the outer tube piece 22 is avoided with inner tube pieces. Since the inner tube piece and thus the interior of the bag is already completely closed by the gluing of the inner bar 90, a further bonding of the inner tube piece in the bottom area is not required. After placing the side flaps, these can be held by a cover sheet in the applied position, wherein the cover sheet is bonded only to the outer tube piece 22. Thus, the embodiment of the invention shown in Figure 13 allows a particularly dense bag with inner latch, wherein the outer layer 22 is removable in a simple manner.
- FIGS. 15 and 16 illustrate a stage of the inventive production method for bags according to the invention, namely the production of multi-ply paper web sections 15 or hose sections 22, 32, 42, wherein inner layer or inner hose sections have a projection U with respect to the outer layer or the outer hose section.
- FIG. 15 explains the production of a two-ply paper web section 15 according to FIG. 3. Paper webs are unwound from rolls 20 and 30 and laid one on top of the other in the tubular machine. The paper web 20 is for the outer layer or the outer tube piece 22, and the paper web 30 for the inner tube piece 32 of the bags according to the invention.
- the paper webs are provided with a rectilinear transverse perforation 27, 28, 37, 38, which later form the upper and lower edges 27, 28, 37, 38 of outer and inner tube pieces 22, 32.
- a second station 96 of the tube machine then the paper web sections 22 and 32 are separated.
- two-ply paper web sections 22, 32 are formed in which the upper and lower ends 37 and 38 of the inner tube piece 32 each have a projection U opposite the upper and lower ends 27 and 28 of the outer tube piece 22.
- FIG. 16 shows the production of a three-ply paper web section 15 according to FIG. 7.
- the paper from the paper roll 20 forms the outer ply
- the paper from the paper rolls 30 and 40 forms the inner ply 32, 42
- the paper webs 20, 30, 40 provided with straight transverse perforations, and in the station 96, the paper web sections are separated, so that the inner layers or inner tube pieces 32, 42 form a supernatant U at both ends of the outer tube piece 22.
- the paper web sections or hose pieces 22, 32, 42 in the conveying direction F of the hose machine have the same length L. Only the perforation or cutting lines are offset from each other, wherein the paper web section 32 is shifted relative to the section 22 in the conveying direction to the rear, and the Section 42 opposite the section 22 forward.
- the folding, laying and gluing the floors according to the invention takes place in a floor laying machine, not shown in FIG. 15/16.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017004268.3A DE102017004268B4 (de) | 2017-05-03 | 2017-05-03 | Mehrlagiger Sack |
PCT/EP2018/054937 WO2018202340A1 (de) | 2017-05-03 | 2018-02-28 | Mehrlagiger sack |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3606835A1 true EP3606835A1 (de) | 2020-02-12 |
EP3606835C0 EP3606835C0 (de) | 2023-11-15 |
EP3606835B1 EP3606835B1 (de) | 2023-11-15 |
Family
ID=61622537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18710375.9A Active EP3606835B1 (de) | 2017-05-03 | 2018-02-28 | Mehrlagiger sack und verfahren zur herstellung eines mehrlagigen sackes |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP3606835B1 (de) |
CN (1) | CN110662704B (de) |
DE (1) | DE102017004268B4 (de) |
ES (1) | ES2970566T3 (de) |
TW (1) | TW201843089A (de) |
WO (1) | WO2018202340A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018114001A1 (de) * | 2018-06-12 | 2019-12-12 | Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh | Mehrlagiger Sack |
DE202021102384U1 (de) * | 2021-05-04 | 2022-08-05 | Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh | Sack für Schüttgut |
DE202021102803U1 (de) * | 2021-05-21 | 2022-08-30 | Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh | Papiersack |
DE102021134238B3 (de) | 2021-12-22 | 2023-05-04 | Mondi Ag | Verfahren zum Herstellen von Papiersäcken und Papiersäcke |
Family Cites Families (34)
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DE357123C (de) * | 1922-08-15 | Rheinische Sackfabrik M J Oppe | Papiersack aus mehreren Lagen | |
GB492741A (en) * | 1936-12-24 | 1938-09-26 | Max Goder | Improvements in and relating to methods of making paper bags and apparatus therefor |
GB709750A (en) * | 1951-09-13 | 1954-06-02 | Medway Paper Sacks Ltd | Improvements in or relating to multiply paper bags |
FR1073031A (fr) * | 1952-05-26 | 1954-09-17 | Windmoeller & Hoelscher | Sac en papier, ou similaire, à couches multiples, à fond croise et à clapet et son procédé d'exécution |
CH339804A (fr) * | 1955-12-20 | 1959-07-15 | St Regis Paper Co | Sac à couches multiples et procédé pour sa fabrication |
BE562410A (fr) * | 1957-11-16 | 1958-05-16 | St Regis Paper Co | Tubes a couches multiples a extremites echelonnees, sacs faits de ceux-ci et procedes de fabrication de tels tubes et sacs |
GB853881A (en) * | 1958-01-01 | 1960-11-09 | Paper Sacks Ltd | Improvements in and relating to blockbottom í¡ í¡ multiply paper bags |
GB886335A (en) * | 1959-04-30 | 1962-01-03 | Union Bag Camp Paper Corp | Heat sealable stepped end bag |
FR2028049B1 (de) * | 1969-01-16 | 1975-06-20 | Crafsac | |
DE2360142C3 (de) * | 1973-12-03 | 1979-08-02 | Bischof Und Klein, 4540 Lengerich | Mehrlagiger Kreuz· oder Klotzbodensack |
DE2461828A1 (de) * | 1974-12-30 | 1976-07-08 | Windmoeller & Hoelscher | Einseitig offener mehrlagensack |
DE7537404U (de) * | 1975-11-25 | 1976-03-18 | Natronag Papierprod Gmbh | Kreuzboden-Papiersack mit einer Aufreisseinrichtung |
DE2615543C2 (de) | 1976-04-09 | 1984-08-23 | Bischof Und Klein Gmbh & Co, 4540 Lengerich | Kreuzbodenventilsack aus zueinander gestaffelten Papierlagen |
US4260061A (en) * | 1979-07-05 | 1981-04-07 | Bemis Company, Inc. | Bag with opening and reclosing feature |
US4744466A (en) * | 1981-12-08 | 1988-05-17 | Chase Bag Company | Quick opening pinch seal bag |
DE3761425D1 (de) * | 1986-10-22 | 1990-02-22 | Wilhelmstal Werke Gmbh | Kombinationssack aus einem aussen-und innensack. |
US5653090A (en) * | 1993-03-01 | 1997-08-05 | Ongard Systems, Inc. | Sterilizable flexible pouch package |
US5644900A (en) * | 1994-02-07 | 1997-07-08 | Stone Container Corporation | Multiwall bag |
CN1180338A (zh) * | 1995-02-01 | 1998-04-29 | 麦克尼尔-Ppc公司 | 柔性管状包装 |
JPH08276527A (ja) * | 1995-04-05 | 1996-10-22 | Dainippon Printing Co Ltd | 包装用クリ−ンフィルムおよびそれを使用した包装用袋 |
JP2001058652A (ja) * | 1999-08-25 | 2001-03-06 | Chuo Seitai Kk | 包装用袋における端部の封緘構造及び該封緘構造を備えた包装用袋 |
CN2640939Y (zh) * | 2003-01-23 | 2004-09-15 | 陈宗德 | 一种手卷包装袋改进结构 |
EP1714892A3 (de) * | 2005-04-20 | 2007-02-07 | Alcan Technology & Management Ltd. | Verpackungsbeutel mit umverpackung |
CN200939976Y (zh) * | 2006-11-15 | 2007-08-29 | 吉林华润生化包装有限公司 | 可分离式挝口阀口衬膜纸袋 |
DE102010051579B4 (de) | 2010-08-06 | 2021-11-11 | Segezha Packaging Gmbh | Papiersack |
US9499309B2 (en) * | 2011-07-28 | 2016-11-22 | Intercontinental Great Brands Llc | Reclosable packaging using a low-tack adhesive fastener |
DE202014000194U1 (de) | 2014-01-10 | 2015-04-14 | Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh | Papiersack |
JP6380947B2 (ja) * | 2014-02-20 | 2018-08-29 | 石川株式会社 | 開封容易な防湿性多層袋 |
CN204507614U (zh) * | 2014-12-02 | 2015-07-29 | 上海艾录包装股份有限公司 | 一种阶梯状阀口袋 |
DE202015006392U1 (de) * | 2015-09-11 | 2016-12-13 | Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh | Ventilsack |
CN205327726U (zh) * | 2015-12-17 | 2016-06-22 | 上海艾录包装股份有限公司 | 一种阀口易打开的包装袋结构 |
CN205525609U (zh) * | 2016-04-19 | 2016-08-31 | 河南佰嘉新型节能材料有限公司 | 一种独立pe膜阀口袋 |
CN105923247B (zh) * | 2016-06-29 | 2018-12-11 | 石家庄康益包装有限公司 | 一种纸塑复合密封袋 |
CN206050423U (zh) * | 2016-08-29 | 2017-03-29 | 宜兴威尼特集装袋有限公司 | 易拉条便捷脱包纸包装袋 |
-
2017
- 2017-05-03 DE DE102017004268.3A patent/DE102017004268B4/de active Active
-
2018
- 2018-02-28 EP EP18710375.9A patent/EP3606835B1/de active Active
- 2018-02-28 WO PCT/EP2018/054937 patent/WO2018202340A1/de unknown
- 2018-02-28 ES ES18710375T patent/ES2970566T3/es active Active
- 2018-02-28 CN CN201880029525.4A patent/CN110662704B/zh active Active
- 2018-04-27 TW TW107114525A patent/TW201843089A/zh unknown
Also Published As
Publication number | Publication date |
---|---|
EP3606835C0 (de) | 2023-11-15 |
CN110662704B (zh) | 2022-10-18 |
DE102017004268B4 (de) | 2019-05-16 |
DE102017004268A1 (de) | 2018-11-08 |
WO2018202340A1 (de) | 2018-11-08 |
TW201843089A (zh) | 2018-12-16 |
CN110662704A (zh) | 2020-01-07 |
ES2970566T3 (es) | 2024-05-29 |
EP3606835B1 (de) | 2023-11-15 |
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