EP3257776A1 - Sac et son procédé de fabrication - Google Patents

Sac et son procédé de fabrication Download PDF

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Publication number
EP3257776A1
EP3257776A1 EP17170571.8A EP17170571A EP3257776A1 EP 3257776 A1 EP3257776 A1 EP 3257776A1 EP 17170571 A EP17170571 A EP 17170571A EP 3257776 A1 EP3257776 A1 EP 3257776A1
Authority
EP
European Patent Office
Prior art keywords
load
bag
load element
region
sack
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
Application number
EP17170571.8A
Other languages
German (de)
English (en)
Other versions
EP3257776B1 (fr
Inventor
Thomas Bruns
Peter LÜTTMANN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE102016119113.2A external-priority patent/DE102016119113A1/de
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP3257776A1 publication Critical patent/EP3257776A1/fr
Application granted granted Critical
Publication of EP3257776B1 publication Critical patent/EP3257776B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/06—Handles
    • B65D33/065—Integral handles
    • 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
    • B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/06—Handles
    • B65D33/10—Handles formed of similar material to that used for the bag

Definitions

  • the present invention relates to a bag according to the preamble of independent claim 1 and to a method for producing a bag.
  • Bags that can be filled with a bulk material are known in principle.
  • Sacks usually comprise a shell which forms an interior space in which the bulk material can be introduced.
  • construction materials such as cement or the like in question, but in the field of end consumers increasingly bags for example for consumer goods are used.
  • products for animals, especially animal feed are often offered in bags.
  • different types of materials are provided for these bags, in particular sacks, which are made of a fiber material, in particular a fabric, a high strength and thus a high possible load guarantee.
  • the fibers or bands of the overall structure of the bag in particular by their arrangement allow such strength, it is often problematic to provide further functional elements on the bag.
  • Such functional elements are connected to the shell material of the bag, wherein at very high temperatures, such as when welding at very high temperatures, the mechanical properties of the material can be changed, so that, for example, a bias in bands of a fabric is annealed.
  • very high temperatures such as when welding at very high temperatures
  • the mechanical properties of the material can be changed, so that, for example, a bias in bands of a fabric is annealed.
  • the load introduction is problematic because the handle should normally carry the weight of the bag, or should transfer the load to the shell of the bag.
  • Sacks with handles are known in the prior art, with the handles arranged, for example, in a filling area of the bag, so that a user of the bag grips both handles and transmits the load substantially in half across the handles.
  • the handles are usually mounted on an inner side of the bag parallel to the shell, so that the force introduced to lift the handle as a shearing force in the bag and the connection is charged accordingly.
  • the handles usually stand out of the filling opening of the bag, so that the appearance of the bag is impaired.
  • a closure element is usually possible only below the handle assembly, in particular because the handles would otherwise protrude through the closure element and prevent a closure.
  • the object of the present invention at least partially overcome the above known from the prior art disadvantages.
  • a bag which can be filled with a bulk material, has a casing with at least one surface element, the casing having a fabric and the surface element having a gripping means.
  • the gripping means comprises a load element, on which a carrying capacity for lifting the bag can be applied.
  • the load element is designed such that it, i. the load element, at least in a load state, in which the carrying force acts on the load element, at least partially protrudes from an outer side of the surface element.
  • the bag is a pinch bottom bag or a pinch bottom bag.
  • Such a bag may preferably have a side fold and a folded bottom so that it can be used particularly advantageously for palletizing.
  • such a shape of the bag provides an easy way to provide a mechanism for opening, such as several folds at the top.
  • an interior of the bag can be formed by the shell of the bag, which can be filled with the bulk material.
  • a bag according to the invention may be suitable for handling animal feed or foods.
  • fields of application such as building materials, in particular cement or other materials, preferably with a high density and thus a high weight per cm 3 come into question.
  • a region of the shell are preferably understood, which has an at least partially planar extent. In this case, the surface element may for example be folded in the unfilled state of the bag, so that the planar extension is visible only in a filled state of the bag.
  • the gripping means may preferably be a handle, which can be grasped in particular from the outside or in which it can be intervened, in particular, from the outside.
  • the gripping means on the load element.
  • the load element can be arranged, for example, indirectly or directly on the surface element, in particular on the outside or inside of the surface element, with at least one first end of the load element, particularly preferably with a first and a second end of the load element.
  • the application of the carrying capacity can be understood in such a way that the weight of the bag with or without filling by the bulk material during lifting at least partially counteracts the carrying capacity, so that, for example, in a connection region of the load element with the surface element creates a load.
  • the fact that the load element at least partially protrudes from the outside can therefore be understood in particular to mean that the load element protrudes relative to the outside or in comparison to the outside.
  • the load element can at least partially extend in a direction which is substantially perpendicular to the surface element and / or parallel to the carrying capacity.
  • the load element can thus be formed, for example, as a survey on the surface element.
  • the load element can be at least partially spaced from the outside of the surface element.
  • the outside of the surface element can be understood in particular as the outer surface of the surface element.
  • the load element can thus extend at least in the load state like an arc on the outside of the surface element.
  • the load condition may be a condition of the grip means.
  • the load element and / or the surface element can be made flexible.
  • the bag can be particularly easily folded and thus be storable in the unfilled state in a small space.
  • a flexibility of the material also offers advantages in the storage of the bulk material itself, since thus the shape of the content or the load conditions can be at least partially adaptable.
  • the load element can furthermore be arranged directly or indirectly on the surface element.
  • an inventive bag is particularly easy to handle.
  • the handle means is thereby concealed, so that the appearance of the bag can be improved, which ultimately also products that can be sold, for example in a sack, can be easier to advertise.
  • the constructive freedom, which allows such an arrangement of the handle means is high, so that there may be various design possibilities of a bag with such a handle means.
  • a gripping means according to the invention can furthermore ensure in particular a good force transmission, so that a plastic flow in the region of the gripping means is reduced or even excluded.
  • a grip means can be sufficient for introducing the complete load capacity.
  • the constructive freedom may extend to the handle means, so that this is particularly comfortable ausgestaltbar.
  • a filling region of the bag can be configured without a handle, so that the total surface of the casing can be used essentially or completely for the filling, the closure and the folding of the bag and thus the material requirement for the bag is reduced.
  • a fabric can be understood to mean a material which is preferably formed from strips or tapes which, for example, have a bias due to stretching or are brought into an inherent stress state.
  • the bands may preferably be arranged at least partially perpendicular or substantially perpendicular to one another, so that in particular a checkerboard-like weave pattern is formed.
  • the weave pattern is preferably regular, in particular a portion of the bands of the fabric extending parallel to each other in a first direction and another portion of the bands extending parallel to each other in a second direction, wherein the first and second directions are preferably perpendicular.
  • the fabric may also be advantageously surrounded by a plastic layer, wherein the plastic layer may be formed in particular as a film.
  • the strips can be glued to the plastic layer or the plastic layer can be applied as a melt.
  • the bands of the fabric preferably comprise a plastic, such as a polyolefin, particularly preferably a polypropylene.
  • the bands may also consist of the polyolefin or polypropylene.
  • the width of the ribbons which can greatly influence the properties of the weave pattern, may be between 2 mm and 4 mm, preferably between 2.3 mm and 3.4 mm
  • the basis weight of the fabric is preferably between 50 g / m 2 and 100 g / m 2 , with about 70 g / m 2 being particularly suitable.
  • the entire fabric consists of a polyolefin, more preferably of a polypropylene, so that a pairing of two different materials is not necessary.
  • the plastic layer may also comprise a particularly biaxially oriented polypropylene, wherein the layer thickness of the plastic layer may preferably be ⁇ 50 g / m 2, more preferably ⁇ 40 g / m 2 . It is also possible to provide an adhesion-promoting agent which favors a connection of the plastic layer to the bands. By the tissue, the bag thus has a high strength at low cost and low weight.
  • the handle means in a discharge state and in the load state can be brought, wherein the load element terminates in the relief state with an inside and / or outside of the surface element at least substantially flush.
  • the unloading state is preferably defined by the fact that the carrying force does not act on the load element of the grip means or no force acts on the load element, so that the load element has little or a low internal stress.
  • the handle means may preferably be in the discharge state when the bag is sold.
  • an opening in the surface element may be pre-punched, so that a user can first first release the load element for applying the carrying capacity from the surface element and then transfer it into the load state.
  • the load state may be a state of the handle means and further defined by acting on a force, preferably the carrying capacity, at which the bag may for example be carried, lifted or otherwise moved.
  • the inner side and / or the outer side can preferably lie in a plane with the main direction of extent of the surface element, or run at least partially tangentially to the surface element.
  • the inner or the outer surface of the load element parallel to the inner or outer side of the Surface element lie.
  • the load element has a reinforcing means, in particular wherein the reinforcing means may preferably be arranged centrally on the load element.
  • the reinforcing agent may preferably be an additional component.
  • the reinforcing means may be a reinforcing label, in particular which can be applied to an inner and / or outer surface of the load element.
  • the reinforcing agent may form a second layer below a first layer of the load element.
  • the reinforcing means may comprise a plurality of reinforcing tabs.
  • the reinforcing means thus provides for a thickening at least in a partial region of the load element, so that the load bearing of the grip means is improved overall and thus the strength of the grip means is increased.
  • the reinforcing means may advantageously be fastened to the surface element and / or to the load element, in particular wherein the reinforcing means may be welded to the surface element and / or the load element.
  • the reinforcing agent may form a second layer below a first layer of the load element.
  • the reinforcing agent can be fastened on the surface element and / or on the load element in a material-locking manner, particularly preferably hot-air welded or adhesively bonded.
  • Adhesive bonding has at least the advantage that adhesive, which can preferably be a hot-melt adhesive, is particularly favorable and further apparatuses for producing the connection can be kept simple, since only application of the adhesive is necessary.
  • the reinforcing agent may further preferably be mounted on the outside and / or an inside of the surface element. Likewise, the reinforcing means may be mounted on an outer and / or inner surface of the load element.
  • the attachment of the reinforcing agent on the inside of the load element and / or the surface element has at least the advantage that the reinforcing agent is not or only slightly perceptible, at least the first impression of the bag, so that the appearance of the bag is not affected by the reinforcing agent and the Reinforcement can be made low, for example, especially since it may not be directly visible.
  • An attachment of the reinforcing means on the outside has the advantage that the reinforcing means can be used simultaneously to highlight the handle means, so that a user of the bag is particularly pointed directly to the presence of the handle means and this does not overlook.
  • the reinforcing agent can simultaneously provide protection at least for the load element against environmental conditions when the reinforcing means is disposed on the outside.
  • the reinforcing means can be designed in one piece with the load element.
  • the load element may preferably be created by fastening the reinforcing means, in particular a reinforcing label, to the surface element, so that only one production step is necessary in order to arrange the load element with sufficient strength on the surface element.
  • the number of components required can be reduced so that the manufacturing costs for the bag are further reduced.
  • the gripping means in the surface element and / or in the reinforcing means in a bag according to the invention comprises at least one opening, so that the load element is movable.
  • Such an opening may be, for example, an interruption in the surface element.
  • the fabric of the surface element for example, in this area at least partially not related, so that the load element is movable at least in a certain region of the load element relative to a region of the surface element.
  • two openings may be provided, so that the load element is arranged between the two openings.
  • an opening in the surface element and / or in the reinforcing means is obtained by simple manufacturing methods, such as a separation of the material by cutting or punching a high freedom of movement of the load element and / or a simple manufacturing method of the same.
  • a single opening in the surface element can thus in particular the load element in the load state only partially protrude from the outer surface of the surface element, so that a user can grip the load element by hand and the carrying capacity at least partially via a curvature, in which the load element continuously can go into the surface element, is transferable.
  • the opening may comprise an incision.
  • the load element can be manufactured or through the opening, a passage can form in the surface element, through which the load element can be passed, so that, for example, the load element can be fastened to the inside of the surface element.
  • An incision can preferably be understood to mean a separation of the material, in particular wherein the width of the incision is zero or substantially zero and / or preferably no material removal takes place when the incision is made.
  • the opening may preferably extend along the load element.
  • the opening may further advantageously be a recess, which may preferably have a width of 2 mm to 5 mm.
  • the width may preferably extend perpendicular to the main extension direction of the load element or the opening.
  • the opening parallel to the load element has a length of> 90 mm, preferably from 100 mm to 180 mm.
  • the load element may preferably have the same length as the opening in a one-piece design with the surface element, the length extending parallel to the load element.
  • At least one first layer of the load element can be integrally formed with the surface element in a sack according to the invention.
  • the load element can be configured completely in one piece with the surface element.
  • the load element may be formed for example by providing an opening in the surface element.
  • the outside of the surface element and the outer surface of the load element steplessly merge into one another. This can be particularly cost-effective to manufacture and cause a high strength of the handle means by a favorable power flow.
  • At least or only one upper or lower layer of the load element can also be designed in one piece with the surface element, so that the above-mentioned advantages result, wherein the respective other side of the load element can be reinforced at the same time, for example by a reinforcing means.
  • the opening in a load introduction region of the handle means has a fillet.
  • a rounding advantageously a radius of a circular, oval or elliptical end.
  • the fillet may advantageously also be a circle which is stamped, for example, at the end of an incision.
  • a tear propagation resistance of the fabric can be improved, wherein the tear strength of the fabric can preferably be a resistance of the material to crack propagation in this area. This is particularly advantageous in the load introduction region of the grip means, since a strong local stress can occur here.
  • the load introduction region of the gripping means can be understood as the region which is located in particular directly on the load element or adjacent to the load element, so that, for example, the load can be introduced from the load element to the surface element and / or the reinforcing element in the load introduction region.
  • the load introduction region may be located at a first and / or second end of the load element, and in particular the attachment region of the load element, wherein the Opening may protrude into the load application area or adjacent to this.
  • the grip means comprises a planar sealing element, which is arranged at the opening such that a loss of bulk material is prevented by the opening, wherein the sealing element with the surface element, in particular around the opening circulating, connected is.
  • a point can arise on the bag, at which bulk material can escape from the bag, this being prevented by the flat sealing element.
  • a leak especially if the material begins to flow plastically the surface element and / or the reinforcing agent due to a load.
  • the sealing element at least in the context of a tolerance, which is essentially determined by the size of the sealing element, prevent the loss of bulk material in a tearing of the material or at least delay it. Since the bulk material, for example, when it comes to a consumer good, is usually the focus of the end user, preventing the loss of bulk material improves the quality of the bag, especially in the eyes of the end user, so that this ultimately also on a further purchase of the product. Furthermore, the sealing element can reverse the bulk material also protect against environmental influences, in particular against moisture or liquids. Thus, the sealing element may preferably be designed as a sealing strip, which is preferably applied to the inside of the surface element and / or the reinforcing agent.
  • the connecting portion of the sealing means may surround the opening directly or comprise a further region, so that, for example, a second opening is still within the circulation of the compound.
  • a connecting portion of the sealing element may be sufficient to seal a plurality of openings.
  • the gripping means may have an engagement region which can be formed at least partially by the load element, in particular, wherein the load element in the engagement region can be engaged under at least substantially parallel to an outer side of the surface element.
  • the engagement region By providing the engagement region, the user can manually engage in the grip means and thereby introduce a load from the underside of the load element into the load element or the grip means.
  • the load element can simultaneously be folded in and out and thus be able to be transferred from the unloaded state into the load state, wherein the load element in the unloaded state can be hidden in particular optically.
  • the load element and / or the engagement region is configured sealing element-free.
  • the sealing element does not protrude into the engagement region on the underside of the load element, so that a user does not notice any edge during the transition from the sealing element to the sealing element-free section when worn.
  • the wearing comfort can be further increased.
  • the sealing element is not loaded directly, so that only small demands can be placed on the sealing element with respect to the strength. A contamination of the sealing element can be reduced so that it is not visually impaired by the pollution and is not significantly reduced in its strength.
  • the sealing element with the reinforcing means and / or the load element in particular be materially connected.
  • the sealing element may also preferably be glued or hot-air welded, so that a secure connection is given with a simple manufacturing possibility.
  • the sealing element can further support or improve the load transfer from the load element into the surface element.
  • the connecting portion may further comprise a rounding and / or in the load introduction area of the handle means tangential to the rounding of the opening.
  • a rounding can be understood to mean an outer radius which preferably extends at least partially or completely over the width of the connecting section.
  • Such a rounding can further improve the power flow and thus the strength, so that the reliability of the grip means when carrying the bag can be further increased.
  • a tangency in the load introduction area to improve the power flow is suitable, so that this can further increase the strength of the handle means.
  • each of the components may comprise a tissue or consist of a tissue, more preferably the same tissue or consist of the same tissue.
  • This allows a particularly simple connection of the components, since the connection can be matched to the properties of a single material or type of material. Furthermore, this may also promote the strength, since the fabric as such may preferably have a high strength. Furthermore, the production costs can be facilitated by a uniformity of materials that less different materials must be handled.
  • the surface element is a side region of the sack, in particular wherein the surface element has a gusset.
  • the side area may preferably be foldable, so that the bag in the unfilled state has only small transport dimensions and thus many bags can be stored in a small space.
  • the gripping means can be arranged hidden in the side region of the bag, so that the appearance of the bag is not affected by the gripping means.
  • a comfortable pouring out of the bulk material from the bag is possible.
  • a second gripping means is arranged on a second surface element of a side region of the sack opposite the first side region.
  • the shell has a filling limit, wherein above the filling boundary, a filling region is provided, on which the bulk material can be discharged from the bag, and the gripping means is provided below the filling limit.
  • the filling area can have, for example, a quick-release closure, a seam or an adhesive bond, so that the sack can be easily opened by a user at this point. Due to the quick release, this can even be provided resealable.
  • the arrangement of the handle means below the filling limit results in a favorable power distribution when the bag is worn or when the bag is tilted. For example, a simple tilting of the bag from the wrist for a pouring sufficient, if the handle means is positioned advantageously advantageous.
  • bulging of the surface element is reduced when introducing the carrying capacity when the bag in the vicinity of the handle means is at least partially stabilized by the bulk material.
  • the gripping means may preferably be below a center of gravity of the bag, in particular when the bag is filled with the bulk material.
  • the pouring out of the bulk material can be further simplified, at least for the completely filled bag, since the weight of the bulk material generates a moment when the bag is tilted, which can assist a further tilting and thus pouring out.
  • the filling limit may be given by the shape of the bag, so that a specially designated filling limit is not necessary.
  • the outside of the surface element and / or an outer surface of the load element can be coated in a sack according to the invention.
  • a coating may preferably be understood to mean printing, painting and / or lamination. This can on the one hand improve the appearance of the bag and at the same time improve the strength of the shell on the other hand. A protection against environmental influences can also be improved by the coating, wherein at the same time the production costs can be reduced by a simpler printing on the coating.
  • the bag has a display area in order to guide a user to the gripping means. It can the Display area, for example, a user point to the position or generally the presence of the grip means. Thus, to improve the appearance of the handle means may be hidden and at the same time easily be found by the user.
  • the load element can be designed in such a way that at least substantially a normal force can be introduced into the surface element by the carrying force. That by the carrying capacity substantially a normal force in the surface element can be introduced, can also be understood in the sense of the present invention that the surface element may be at least partially partially or substantially resilient to bending.
  • the normal force can preferably be understood to mean a force which acts at least substantially perpendicular to the planar extent of the surface element.
  • the normal force may also preferably represent a component of a force acting in a different direction, wherein such a component exists only when the force is different from a pure shear force and does not act exclusively in the plane of the planar extension of the surface element.
  • the normal force can also act in parallel to the carrying capacity.
  • the normal force can be e.g. in particular act as a cutting force within the material, so that the transfer of the carrying capacity, for example, in a local bending and / or bending of the surface element may result.
  • the normal force in the connection region between the surface element and the load element of the grip means can be introduced into the surface element.
  • Such a configuration of the grip means or the load element results in a high strength of the grip means, since the load introduction is well distributed and thus the stress can be kept low.
  • the connection areas of the components can not be charged or only slightly by a shearing force and thus the requirements for the connection as such can be reduced.
  • a bag in particular a pinch bottom bag is claimed, which is filled with a bulk material and having a shell with at least one surface element, wherein the shell comprises a nonwoven material and the surface element comprises a handle means, which is a load element comprises, on which a carrying capacity for lifting the bag can be applied.
  • the load element is designed such that it at least in a load condition, in which the load capacity on Load element acts, at least partially protrudes with respect to an outer side of the surface element.
  • a bag according to the invention comprising a fabric
  • a nonwoven material brings the same advantages as have been described in detail with reference to a bag according to the invention with a fabric.
  • a nonwoven material can be produced inexpensively and have a uniform surface.
  • the provision of the flat material web can take place, for example, by first weaving a tube, wherein the weaving can be in particular a placement of plastic bands in a regular, crossing sequence. Thereupon, the tube can preferably be separated, so that the flat material web is formed when spreading the tube material. Thus, a continuous strand of Tissue are generated, which is the flat material web in a subsequent manufacturing station.
  • the flat material web has at least one area on which the grip means is provided.
  • the separation of the surface area according to step c) may preferably take place after the provision of the gripping means according to step b) or, for example, before step b), so that first the area areas are separated and then the gripping means is applied to the isolated area areas.
  • the processing of the envelope section into a casing can preferably take place in that the surface regions are folded along the later folded edges of the bag, which may preferably be opposite diagonally. Under the surface area may further preferably be understood a portion of the material web, which forms at least a portion of the shell of the bag in the manufacture of the bag. Preferably, the material web may have a plurality of surface areas, which follow each other in particular. Thus, in particular, a high degree of automation can be achieved if the material web continuously has further surface areas which are processed at least in accordance with steps b) to d) or a) to d).
  • the method for producing the bag is preferably automatable, since at least the method steps a) to d) are at least substantially executable by a machine.
  • a strand of web material may be produced which, for example, is moved at about 70 m / min.
  • the coating may in particular be a coating and / or a lamination.
  • the application of the coating can also take place at an earlier or later point in time in the process, wherein, for example, the coating can already be applied to the round-woven tube or to the particular isolated area. This results in a protection of the material against environmental influences and increased strength.
  • a printing which may represent a further coating, be simplified by a first coating, so that the dye adheres better to the bag.
  • coating, printing and further coating can also be applied alternately, so that initially a printing-promoting surface is created, this is then printed and then a protective layer is applied over the print.
  • reinforcing means can be applied at regular intervals to the surface regions, so that each surface region, which preferably subsequently forms an enveloping section, has reinforcing means.
  • the reinforcing agent may be a reinforcing tab, which is materially connected to the surface area or the material web.
  • the application of the reinforcing agent is thus automated possible, with a simple machine can be used for production.
  • a rotating element can be provided which deposits and connects the reinforcing means, for example in the form of reinforcing sheets.
  • the reinforcing agent can also be applied in a raw state of the material web, hardly any other components have influences on the positioning of the reinforcing agent at this time, so that tolerances of other components need to be considered only slightly or not at all. This further favors automated manufacturing and thus the cost of making the bag.
  • the opening into the surface area it is possible, for example, to produce a load element of the gripping means which is configured in one piece with the surface area.
  • the reinforcing means may protrude beyond the load element, wherein the openings may be introduced simultaneously, for example, by the surface area and the reinforcing means, so that the load element may be configured with the surface area and / or the reinforcing means.
  • This step is also possible in a simple automated process of production, resulting in a cost-effective production.
  • the introduction of the at least one opening can be effected by a cutting and / or punching process.
  • a rotating punch may be provided, which introduces the opening in the surface area at regular intervals, so that a simple production is possible, which can be very reliable in particular by low error rate.
  • the bag can be automated by simple production steps and / or produced material-saving.
  • a separation of the at least one surface area can be understood, for example, as meaning that it takes a different direction from the current material flow or is otherwise processed further.
  • folding surface area for example, preferably a pinch bottom sack or at least one envelope portion of a shell of a pinch bottom sack can be produced.
  • the bag can be made from a single area only by folding and joining two edge areas.
  • a single surface area can be combined with other surface areas in order to achieve a shell of the bag of several components.
  • a first folding of the surface area before the separation of the surface area and a second folding of the area area after singulation can take place.
  • the application of the sealing element can be made such that it is arranged above the opening, so that a loss of bulk material is prevented by the opening.
  • the sealing element can on the one hand protect against loss of bulk material and on the other hand provide protection of the bulk material itself, in which this is protected by the sealing element from environmental influences.
  • the connection of the sealing element with surface area, the reinforcing agent and / or the load element can be carried out such that first a release coating is applied to the areas over which the fastened sealing element is to extend, and only then the connection takes place.
  • the connection portions can be designed reliably and with high accuracy. For example, it may be provided that the sealing element does not protrude into an engagement region of the grip means, so that a user does not feel an edge and thus the comfort when lifting the bag is improved.
  • the method steps in the order a) to d) can be performed.
  • individual steps or all steps can be repeated, for example to ensure mass production.
  • another sequence of steps a) to d) is conceivable.
  • the surface area or at least one of the Area is formed into a tube before it is separated and then sealed to a shell to save further costs.
  • FIG. 1 shows a bag 1 according to the invention in a first embodiment in a schematic perspective view.
  • the bag 1 shown here is in particular a pinch bottom bag or a pinch bottom bag, although other types of bags are also conceivable.
  • the bag 1 can be filled with a bulk material, wherein a filling limit 6 is provided, up to which the bag 1 is preferably filled with the bulk material.
  • the filling region can preferably be closed by one or more folds.
  • a filling region 8 is provided, from which bulk material can be released from the bag 1.
  • the bag 1 has a shell 2, which in turn comprises a fabric.
  • the shell 2 of the bag 1 is folded several times, so that a plurality of surface elements 3, 3.3 arise.
  • At least one of the surface elements 3 in this case has a grip means 10 which comprises a load element 11 for applying a carrying force 4 or for transmitting the carrying force 4 to the surface element 3.
  • the load element 11 is designed in such a way that, at least in a load state II in which the load-bearing force 4 acts on the load element 11, it protrudes at least in regions relative to an outer side 3.2 of the surface element 3.
  • the carrying capacity 4, in particular at least partially or substantially a normal force can be introduced into the surface element 3.
  • the surface element 3, which has the grip means 10 is in particular a side region 1.1 of the bag 1, the side region 1.1. has a gusset 1.2.
  • the grip means 10 is preferably arranged substantially symmetrically to the side fold 1.2, so that the grip means 10, in particular the load element 11 of the grip means 10, likewise has the side fold 1.2.
  • the bag 1 is folded flat in the unfilled state, so that a required storage space for the bag 1 is reduced when the bag 1 is unfilled.
  • the bag 1 has a second gripping means 10 on a side of the bag 1 opposite the side area 1.1. Additionally or alternatively, however, the grip means 10 or a further grip means may be provided on each of the further surface areas 3.3.
  • a display area 7 is further provided on the shell 2 of the bag 1, which can give the user, for example, the indication that the handle means 10 exists or at which point of the bag 1, the handle means 10 can be found.
  • the handle means 10 a handle means of one of the following embodiments, in particular the FIGS. 2 to 8 , be.
  • FIG. 2a shows a handle means 10 of a bag 1 according to the invention in a second embodiment.
  • the grip 10 has a load element 11.
  • an upper first layer 11. 4 of the load element 11 is formed integrally with a surface element 3 of a casing 2 of the bag 1, which is shown here schematically in a section.
  • Extending in parallel with the load element 11 are two openings 13 which, in a load introduction region 16 of the grip means 10 on the surface element 3, have fillets 13.2. Therefore, the load element 11 is connected at a first and a second end 11.1, 11.2 of the load element 11 with the surface element 3.
  • the fillets 13.2 of the openings 13 in particular have a radius which corresponds to half a width 13.1 of the opening 13, in particular so that the openings 13 are particularly easy to manufacture.
  • the width 13.1 of the openings 13 may preferably be 2 mm to 5 mm.
  • the load element 11 and the reinforcing means 12 may be attached, for example, by gluing or by hot air welding, wherein in the case of bonding preferably a hot melt adhesive is used, so that in particular adhesive residues are reduced outside the bonding area.
  • a flat sealing element 14, in particular a sealing strip is provided, which is arranged at the openings 13 such that a loss of bulk material through the openings 13 is prevented.
  • the sealing element 14 is connected to the surface element 3 around the openings 13 circumferentially.
  • the handle means 10 is in the illustration of FIGS. 2a and 2b in a state of relief I. So shows FIG. 2b which in particular a sectional view of the embodiment of FIG.
  • FIG. 2a shows that the load element 11 at least substantially flush with an outside 3.2 and an inside 3.1 of the Surface element 3 terminates in the unloading state I, so that the outer side of the surface element 3 3.2 passes in particular continuously in an outer surface 11.3 of the load element 11.
  • a coating and / or printing can be applied or already applied to the outside 3.2 and the outside surface 11.3 in a particularly simple manner.
  • FIG. 2b shows that the openings 13 are introduced into the surface element 3 and the reinforcing means 12, so that the load element 11 can move at least partially or can be solved by the surface element 3.
  • FIG. 3 shows the handle means 10 of the second embodiment of the FIGS. 2a and 2b In a load state II.
  • the load element 11 of the grip means 10 is loaded by a carrying force 4, so that it lifts off from the surface element 3 in particular arcuately or at least partially protrudes against an outer side 3.2 of the surface element 3.
  • the gripping means 10 in this case has the reinforcing means 12 on the load element 11, so that the reinforcing means 12 also lifts off the surface element 3 in the region of the load element 11.
  • When lifting the load element 11 from the surface element 3 also creates an engagement region 15 between the load element 11 and the surface element 3 and between the load element 11 and the sealing element 14, in which a user can engage to carry the bag.
  • this engaging portion 15 can first be generated by slightly lifting the load element 11, so that the user can engage in the engaging portion 15 and the carrying capacity 4 can apply comfortably.
  • the carrying capacity 4 in particular at least partially or essentially a normal force 5 can be introduced into the surface element 3, in particular so that the surface element 3 is subjected to bending at least in some areas.
  • the normal force 5 may preferably be a cutting force, the occurrence of which manifests itself by the bending of the surface element 3.
  • FIG. 4 shows a partial view of a handle means 10 according to the invention in a further embodiment with a first end 11.1 of a load element 11, wherein the load element 11 has a reinforcing means 12. Further, a first layer 11.4 of the load element 11 is integrally formed with a surface element 3, wherein openings 13 are introduced into the surface element 3 and the openings 13 in one Load introduction region 16 at a first end 11.1 of the load element 11 of the handle means 10 have rounded portions 13.2. In the load introduction region 16, furthermore, preferably at least part of the carrying force 4 is transmitted from the load element 11 to the surface element 3.
  • the reinforcing means 12 is arranged centrally of the load element 11 and connected to the surface element 3, in particular on an inner side 3.1 of the surface element 3, wherein the reinforcing means 12 in the load introduction region 16 at least partially tangent to the fillet 13.2 of the opening 13.
  • the connecting section 12.1 of the reinforcing means 12, which connects the reinforcing means 12 to the planar element 3 is likewise rounded, so that here too the force flow from the load element 11 into the planar element 3 is favored, so that as few as possible sharp edges are created and thus one Strength of the bag 1 is increased compared to a crack propagation.
  • FIG. 5a shows a handle according to the invention 10 of a bag 1 in a further embodiment in a schematic perspective view.
  • the grip means 10 is arranged on an outer side 3.2 of a surface element 3 and provided in one piece with a reinforcing means 12.
  • openings 13 are further introduced in the form of incisions, so that a load element 11 at least partially substantially independently of the surface element 3 is movable. Since the load element 11 in particular has the same length as the openings 13, the mobility of the load element 11 and / or the surface element 3 is designed to be flexible, so that the load element 11 can easily deform at least in the region of the grip means 10 to the load element 11 the To allow mobility.
  • At least one engagement region 15 is created at the openings 13, which ensures that the load element 11 can be engaged by a user, so that a bearing force 4 can be introduced from below into the load element 11.
  • a connecting portion 12.1 of the reinforcing means 12 is further provided circumferentially around the load element 11 (shown dotted here), so that a high stability of the grip means 10 is ensured.
  • the illustrated embodiment of the grip means 10, the load element 11 in the load state II and in a discharge state I may be similar or even the same.
  • the carrying capacity 4, in the load state II in particular at least partially or substantially a normal force 5 can be introduced into the surface element 3, preferably so that the surface element 3 is subjected to bending at least in some areas.
  • FIG. 6 shows a handle according to the invention 10 of a bag 1 in another embodiment in the plan view of the inside of the bag 1.
  • a load element 11 of the handle means 10 is formed by openings 13 are introduced into a surface element 3 of the bag 1, so that at least one first layer 11.4 of the load element 11 is formed integrally with the surface element 3.
  • the grip means 10 further comprises a reinforcing means 12, which is arranged centrally of the load element 11, so that the strength of the grip means 10 is improved.
  • the reinforcing means 12 is further connected by two connecting portions 12.1 of the reinforcing means 12 with the surface element 3 in particular cohesively.
  • a flat sealing element 14 is arranged on the inside 3.1 of the surface element 3, which is connected circumferentially around the openings 13 with the surface element 3 and partially with the reinforcing means 12, so that a loss of bulk material through the openings 13 is prevented.
  • the openings 13 in load introduction areas 16 of the handle means 10 fillets 13.2 to counteract cracking.
  • a connecting portion 14.1 of the sealing element 14 is at least partially tangential to the openings 13 and their fillets 13.2 formed, wherein the connecting portion 14.1 (shown here with circles) of the sealing element 14 at least in the load state II, in particular of the grip means 10, at least partially into an engagement region 15 of the load element 11 projects and is also rounded in the engagement region 15.
  • the sealing element 14 can also support the strength of the grip means 10.
  • FIG. 7a shows an inventive handle means 10 of a bag 1 on an outer side 3.2 of a surface element 3 in a schematic perspective view.
  • a load element 11 of the grip means 10 is formed integrally with a reinforcing means 12, wherein the reinforcing means 12 is connected in at least one connecting portion 12.1, preferably two connecting portions 12.1, the reinforcing means 12 with the outside 3.2 of the surface element 3.
  • the connecting portions 12.1 are formed at a first and a second end 11.1, 11.2 of the load element 11, it is for example possible that an engagement region 15 is formed by the load element 11 in a discharge state I, wherein the load element 11 is at least partially spaced from the surface element 3 in the engagement region 15, since the length of the load element 11 is independent of the surface element 3.
  • the reinforcing means 12 may be integrally connected in a connecting portion 12.1 of the reinforcing means 12 with the surface element 3, wherein the reinforcing means 12 is preferably glued to the surface element 3 and / or welded.
  • FIG. 7b shows the embodiment of the handle means 10 of Figure 7a in a side view, wherein it is clear that on the outer side 3.2 of the surface element 3, a connecting portion 12.1 of the reinforcing means 12 is provided, so that an engagement portion 15 is formed by the load element 11.
  • the connecting portion 12.1 of the reinforcing means 12 also represents a load introduction portion 16 of the handle means 10.
  • FIG. 8 shows a further embodiment of a handle according to the invention 10 in a schematic sectional view.
  • the handle 10 has a load element 11, which is designed in one piece with a reinforcing means 12.
  • the reinforcing means 12 is further connected to the surface element 3 on an inner side 3.1 of a surface element 3 of the bag 1, wherein the load element 11 or the reinforcing means 12 is preferably materially connected in a connecting portion 12.1 of the reinforcing means 12 with the surface element 3.
  • the handle means 10 is further in a load state II, so that this at least partially protrudes beyond an outer side 3.2 of the surface element 3 and an engagement portion 15 is formed, in which a user can engage.
  • the load element 11 is further arranged in an opening 13 of the surface element 3, wherein the opening 13 by a flat sealing element 14th is closed, so that bulk material, which preferably bears against the inside 3.1 of the surface element 3 when the bag is filled, can not escape from the opening 13.
  • the connecting portion 12.1 of the reinforcing means 12 also represents a load introduction region 16, in which the surface element 3 is at least partially subjected to bending, in particular by acting on a normal force 5, when in the illustrated load state II, a load capacity 4 is applied.
  • FIG. 9 shows inventive method steps for producing a bag 1 in a further embodiment.
  • a flat material web 200 is provided which has a fabric and comprises at least one surface region 201.
  • the material web 200 is shown purely schematically, in particular from an inner side of a later surface element 3, with further components such as the surface region 201, which in particular represents a section of the material web 200 and can later form an envelope section of the finished sack, so that in particular the dimensions , such as the width of the web 200, do not represent the actual dimensions.
  • the material web 200 can be provided, for example, from a round-woven tube, wherein the round-woven tube is preferably cut after weaving.
  • the flat material web 200 further has a plurality of surface regions 201 and moves along a transport direction 200.1 so that successive process steps can be carried out for the surface regions 201.
  • provision of such a grip means 10 on the surface region 201 results in a carrying force 4 being able to be applied to a load element 11 of the grip means 10 on later use of the finished bag 1 and the load element 11 is designed such that it at least in a load state II, in which the load capacity 4 acts on the load element 11, at least partially protrudes from the outer side 3.2 of the surface element 3.
  • the area 201 after completion of the bag 1, the surface element 3 at least partially or completely form.
  • openings 13 with fillets 13.2 are preferably introduced parallel to one another into the surface area 201, so that a first layer 11.4 of the load element 11 is created.
  • a reinforcing means 12 in particular in the form of a reinforcing tab, is preferably also introduced and in particular centrally connected between the openings 13 with the surface area 201, so that the load element 11 thickened and reinforced this area of the reinforcing means 12 is, so that a higher strength of the grip means 10 can be achieved.
  • the reinforcing means 12 is arranged on the surface area 201 before the openings 13 are introduced.
  • the reinforcing means 12 may for example also be made wider, so that the openings 13 are introduced simultaneously into the reinforcing means 12 and the surface area 201.
  • a planar sealing element 14 is preferably applied centrally above the load element 11, which is arranged at the openings 13 such that a loss of bulk material is prevented by the openings 13, wherein the sealing element 14 is connected in particular with the surface area 201 circumferentially , This is followed by separating at least one surface region 201 from the material web 200, so that the surface region 201 is singulated.
  • the separation of the surface area 201 may also be carried out, in particular, alternatively directly after the provision of the material web or one of the intermediate steps during the application of the grip means 10 in order to be able to handle the surface area individually.
  • the surface area 201 is further processed into a shell, wherein the surface area 201 can be folded and / or can be connected to other surface areas 201 to the shell 2.
  • a first edge region 201.1 of the surface region 201 can be connected to a second edge region 201.2 of the surface region 201, so that a circumferentially closed envelope results, wherein further folds can be made, for example, in a bottom region.
  • a bag according to the first embodiment can be produced by the method steps shown, wherein preferably the grip means according to one of the embodiments of FIGS. 2 to 4 or 6 is trained. Furthermore, it is also conceivable that only an opening in the surface area 201 is introduced, so that the method steps shown also on the handle means according to the embodiment of FIG. 8 can be transferable.
  • FIG. 10 shows inventive method steps for producing a bag 1 in a further embodiment.
  • a flat material web 200 is provided, which comprises a fabric and comprises at least one surface area 201.
  • the material web 200 is further shown purely schematically, in particular by a later outer side 3.2 of a surface element 3, with further components such as the surface region 201, which in particular represents a section of the material web 200 and can later form an envelope section of the finished sack, so that in particular the Dimensions, such as the width of the web 200, do not represent the actual dimensions.
  • the material web 200 can be provided, for example, from a round-woven tube, which is preferably cut open after weaving.
  • the flat material web 200 furthermore has a plurality of surface regions 201 and moves along a transport direction 200.1 so that successive process steps can be carried out for the surface regions 201.
  • provision of such a grip means 10 on the surface region 201 results in a carrying force 4 being able to be applied to a load element 11 of the grip means 10 on later use of the finished bag 1 and the load element 11 is designed such that it at least in a load state II, in which the load capacity 4 acts on the load element 11, at least partially protrudes from the outer side 3.2 of the surface element 3.
  • the area 201 after completion of the bag 1, the surface element 3 at least partially or completely form.
  • a reinforcement means 12 in particular in the form of a reinforcing tab, is preferably applied to at least one of the surface regions 201, so that the load element 11 is formed and connected to the surface region 201 in two connection regions 12.1.
  • This is followed by separating at least one surface region 201 from the material web 200, so that the surface region 201 is singulated.
  • the separation of the surface area 201 may also be carried out, in particular, alternatively directly after the provision of the material web or one of the intermediate steps during the application of the grip means 10 in order to be able to handle the surface area individually.
  • the surface area 201 is further processed into a shell, wherein the surface area 201 can be folded and / or can be connected to other surface areas 201 to the shell 2.
  • a first edge region 201.1 of the surface region 201 can be connected to a second edge region 201.2 of the surface region 201, so that a circumferentially closed envelope results, wherein further folds can be made, for example, in a bottom region.
  • a plurality of surface areas 201 are connected to each other or further envelope sections are added to the Form shell.
  • a bag according to the first embodiment can be produced by the method steps shown, wherein preferably the grip means according to one of the embodiments of Figures 5 or 7 is trained.
  • provision can be made for a hose to be formed before the surface area 201 is separated, and for the hose to be at least partially closed after the separation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
EP17170571.8A 2016-06-16 2017-05-11 Sac et son procédé de fabrication Active EP3257776B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016111030 2016-06-16
DE102016119113.2A DE102016119113A1 (de) 2016-06-16 2016-10-07 Sack, sowie Verfahren zur Herstellung eines Sackes

Publications (2)

Publication Number Publication Date
EP3257776A1 true EP3257776A1 (fr) 2017-12-20
EP3257776B1 EP3257776B1 (fr) 2021-09-01

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EP17170571.8A Active EP3257776B1 (fr) 2016-06-16 2017-05-11 Sac et son procédé de fabrication

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2468650A1 (fr) * 2010-12-23 2012-06-27 Mondi AG Sac dotée d'une ligne d'ouverture et d'une poignée
US20150049965A1 (en) * 2013-08-18 2015-02-19 Mark Gum Film bag
WO2015193914A2 (fr) * 2014-06-18 2015-12-23 Ashok Chaturvedi Procédé de fabrication d'emballage à poignée intégrée sur soufflet latéral et emballage associé
EP2998236A1 (fr) * 2014-09-16 2016-03-23 Mondi Consumer Packaging Technologies GmbH Sachet à soufflets latéraux et procédé de fabrication d'un sachet à soufflets latéraux

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2468650A1 (fr) * 2010-12-23 2012-06-27 Mondi AG Sac dotée d'une ligne d'ouverture et d'une poignée
US20150049965A1 (en) * 2013-08-18 2015-02-19 Mark Gum Film bag
WO2015193914A2 (fr) * 2014-06-18 2015-12-23 Ashok Chaturvedi Procédé de fabrication d'emballage à poignée intégrée sur soufflet latéral et emballage associé
EP2998236A1 (fr) * 2014-09-16 2016-03-23 Mondi Consumer Packaging Technologies GmbH Sachet à soufflets latéraux et procédé de fabrication d'un sachet à soufflets latéraux

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