EP2608954A2 - Sac, procédé et dispositif de fabrication de sacs - Google Patents

Sac, procédé et dispositif de fabrication de sacs

Info

Publication number
EP2608954A2
EP2608954A2 EP11743555.2A EP11743555A EP2608954A2 EP 2608954 A2 EP2608954 A2 EP 2608954A2 EP 11743555 A EP11743555 A EP 11743555A EP 2608954 A2 EP2608954 A2 EP 2608954A2
Authority
EP
European Patent Office
Prior art keywords
layer
cover sheet
web
tabs
air
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
EP11743555.2A
Other languages
German (de)
English (en)
Other versions
EP2608954B1 (fr
Inventor
Uwe Köhn
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 DE102010039770A external-priority patent/DE102010039770A1/de
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Priority to EP11743555.2A priority Critical patent/EP2608954B1/fr
Publication of EP2608954A2 publication Critical patent/EP2608954A2/fr
Application granted granted Critical
Publication of EP2608954B1 publication Critical patent/EP2608954B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/1658—Elements for flattening or folding the mouth portion
    • 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
    • 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
    • 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
    • B65D33/01—Ventilation or drainage of bags
    • 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
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/1691—End- or aperture-closing arrangements or devices using adhesive applied to attached closure elements
    • 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
    • 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
    • B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
    • 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
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without 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
    • 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
    • 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

Definitions

  • the invention relates to a method for producing sacks from pieces of tubing comprising plastic material, according to the preamble of claim 1 and a sack comprising plastic material according to the preamble of claim 12.
  • the invention further relates to an apparatus for producing bottom cover sheet material according to the The preamble of claim 20 and an apparatus for manufacturing sacks according to the preamble of claim 24.
  • Bags and manufacturing methods and devices are well known. In order to produce such bags, it is provided
  • a bottom cover sheet is placed at least on areas of the tabs of the bottom rectangle and / or on areas of the triangular pockets and connected to these.
  • the bags provided with such bottoms are known as cross or block bottom bags.
  • sacks are often made of a round fabric, which includes plastic threads.
  • the round fabric is usually coated on the outside.
  • Such bags can be made by hot air sealing without additional adhesive.
  • the coating of the fabric during the sealing process of the sack and cover sheet is melted without damaging the tissue.
  • the possibility of forming special longitudinal seams is not available.
  • pieces of tubing can be used as starting semi-finished products for the production of sacks, which were produced from a seamless tube produced in a blown film process. Again, no special longitudinal seams can be formed. The production of such hoses is also inexpensive.
  • the object of the invention is therefore to propose a bag and a method and a device for its production, in which a sufficient ventilation of the filling material is made possible.
  • the object is achieved by the claims 1, 12, 20 and 24th
  • a bottom cover sheet which at least partially comprises air-permeable material.
  • a bottom cover sheet is usually the reinforcement of the soil, but according to the invention also assumes the function of venting.
  • Materials that are permeable to air, but impermeable to the contents are known.
  • air-permeable materials are therefore those which by themselves already have the property of permitting air to pass through. This property is inherent in the materials. So it means no materials that have been made permeable to air through subsequent processing, for example by needling or perforation.
  • the air-permeable materials may be nonwovens or filter papers. Further materials are known to the person skilled in the art of bag making.
  • the tabs are folded back so that the edges of the tabs and the edges of the triangular pockets and / or the edge of a valve leaflets surround an opening through which the interior of the bag is accessible. Contrary to the usual manufacturing method in which the bottom flaps overlap, it is therefore provided that an opening is formed between the flaps, so that the air passes unhindered to the air-permeable material and subsequently to the outside. In order to achieve this effect at least approximately, overlapping bottom flaps can also be provided as before, provided with openings, for example perforated.
  • the bottom cover sheet comprises at least two layers. It is envisaged that one of these layers comprises air-permeable material.
  • air-permeable material is usually mechanically less resilient than the actual bag material. Therefore, the further position of the bottom cover sheet, which is not necessarily made of an air-permeable material, can take over the function of soil reinforcement, while the venting function remains in the air-permeable material.
  • a suitable, solid material can be provided for this purpose. An example would be a net of threads or fibers which can absorb tensile forces very well without tearing.
  • the first of the tabs or the triangle pockets facing position consists of air-impermeable material, and in which openings, which allow the passage of air, are introduced.
  • the breakthroughs can be about editions.
  • the openings are advantageously circular, since then the strength is impaired as little as possible.
  • This embodiment of the invention makes it possible to provide the same material, from which the tube pieces are produced, for the first layer.
  • openings or air passages must now be provided in the first layer.
  • the size of the openings is to be chosen so that the strength of the material is impaired only to an acceptable extent.
  • the equality of the materials is particularly advantageous because the ground cover sheet can be connected by the same method or the same adhesives very well with the other bag components, as they are also used in the conventional cover sheet attachment. In this case, the joints are high strength.
  • the second layer then comprises air-permeable material and is expediently applied to the first layer and connected thereto.
  • the bonding is advantageously carried out by gluing, thermal sealing or ultrasonic welding along a connecting seam.
  • application is possible after attaching the first layer to the bottom, it is preferable to perform the application prior to attaching the bottom cover sheet to the bag.
  • ground cover sheets are usually provided as a web material, it is even advantageous to the first layer and the glue together second layer in web-like state together. It is only in the production of the bags that the ground cover sheets forming web material can be singulated to the actual bottom cover sheets.
  • the bonding of the air-permeable material takes place in such a way that all apertures of the first layer are surrounded by the connecting seam.
  • each individual opening is surrounded by a connecting seam, for example an adhesive trace.
  • the respective connecting seam may be at a distance from the surrounding breakthrough, so that the area which is enclosed by the connecting seams is larger than the area of the openings of the first layer.
  • the air which is pressed through the openings during the filling process with comparatively high pressure can be distributed over this area. Then it can escape via the air-permeable material.
  • the distribution over the surface helps to reduce the pressure and to prevent bursting of the adhesive seam. High venting pressures can also occur when the bags are dropped, for example immediately after filling.
  • each of the surfaces surrounded by the adhesive seams is at least twice as large as the area of the associated aperture. For this case, a good venting effect is expected even at high filling speeds.
  • a third layer of the bottom cover sheet is applied to the second layer.
  • This layer is or will be connected to the first and / or the second layer. This can in turn be done after the application of the bottom cover sheet on the bag, but preferably before.
  • the third layer may in particular be or become connected to the long side edges of the first layer of the generally rectangular bottom cover sheet.
  • the third layer can be connected with two adhesive or sealing seams.
  • the first and the third layer can also be formed in one piece. After sticking the second layer can then the overhanging the second layer piece of the first layer are handled.
  • the edges of the first and thereby resulting third layer can be joined together by a seam. It can also be provided on both sides overshooting pieces. These are turned over, with the edges overlapping.
  • the edges are connected to each other, which also adhesive bonding or heat-induced joining methods can be used.
  • the third layer preferably remains unconnected to the two first layers, so that through these openings, the air that passes through the air-permeable material can get into the open.
  • the seams on the large longitudinal sides can be interrupted and / or the end faces partially fixed.
  • mechanically generated openings in the third layer such as needling, may be provided.
  • the described third layer can protect the air-permeable material from external influences and thus from damage. In addition, this layer offers the opportunity to be printed. Finally, penetration of moisture into the interior of the bag is avoided, so that the contents essentially do not change its properties.
  • cuts in the third layer are preferably in the vicinity of the openings of the first layer. These cuts can serve as a valve.
  • the air that penetrates through the air-permeable material must now not only escape through the openings on the front sides of the bottom cover sheet, but can additionally pass through the incisions to the outside. The venting performance of the bag can be significantly increased in this way. If the breakthrough of the first layer is circular, it is advisable to introduce at least one circular-arc incision.
  • the radius of the circular arc should be slightly larger than the radius of the openings, so that the air-permeable material of the second layer continues to be well protected against external influences.
  • the seamlessly produced tube comprises a round fabric made of stretched plastic tape, which is coated with a plastic.
  • the first and the optional third layers of the bottom cover sheet comprise a fabric made of plastic tapes, whereby this fabric is also provided with a coating.
  • the sack and bottom cover sheet can be joined together by a heat-induced joining method. The coatings are melted and the individual parts are pressed together. The coatings fuse together and form a bonding layer between the fabrics upon cooling. Damage to the fabric is avoided in this joining process.
  • the first layer of the bottom cover sheet guarantees a sufficient strength of the bag in the area of the bottom cover sheet. Being made of fabric, it can absorb high forces.
  • the joined connection is suitable for this purpose.
  • the apertures to the air passage are small and do not significantly weaken the cover sheet.
  • the second layer of air-permeable material retains the contents, but allows an air flow.
  • An optimally suitable material can be selected to fulfill this function. This can be, for example, a highly porous paper. It also withstands the heat of the heat-induced joining process. Thus, this material is superior to a plastic fleece. It is expedient, before attaching the bottom cover sheet on the bottom portion of the bag, to apply a release agent to the portions of the bottom cover side facing the bottom of the bag which cover the opening.
  • the subject of the present invention is a bag which comprises plastic material. This sack also includes the following features:
  • a bottom which is folded at least at one end of the hose body and which comprises triangular pockets and these triangular pockets at least partially overlapping tabs,
  • a bottom cover sheet with which the bottom is covered, wherein the bottom cover sheet is placed at least on areas of the flaps and / or on areas of the triangle pockets and connected thereto.
  • the bag according to the invention is characterized according to claim 12 in that the bottom cover sheet comprises at least partially air-permeable material.
  • the bottom cover sheet comprises at least partially air-permeable material.
  • the ground cover sheet material is provided in sheet form. From this ground cover sheet a ground cover sheet is separated and applied to the already folded bag bottom.
  • the device according to the invention now provides a sheet-like ground cover sheet material with which a sack can be produced, in which a sufficient ventilation of the filling material is made possible.
  • the device initially comprises an unwinding device with which a first web comprising plastic can be unwound. Breakthroughs are now being introduced into this lane.
  • a breakthrough generating device for example a punch, is provided.
  • a second web which comprises air-permeable material, can be unwound from a reel.
  • an assembly unit with which the first and the second web can be brought together.
  • the first track is already provided with breakthroughs at this moment.
  • the merging unit may comprise corresponding means by which bonding, thermal sealing or ultrasonic welding is possible.
  • an adhesive unit is provided, with which the first web can be provided with adhesive applications.
  • This adhesive aggregate is expediently arranged upstream of the assembly unit, so that when the webs are brought together, the first web is already provided with adhesive applications.
  • a web transfer device adjoins, with which parts of the first web can be turned over so that the second web is covered.
  • the web transfer device may include guide elements such as guide plates.
  • a further unwinding device can be provided with which a cover web can be unwound from a reel.
  • This web could consist of a particularly inexpensive material.
  • a printing device may be provided, with which a release agent can be imprinted on the first web.
  • This first web then would not need to be printed in a separate printing press.
  • a winding device is provided, with which the bottom cover sheet web produced in the manner described above can be wound up. The winding with such a ground cover sheet can then be brought to a conventional apparatus for producing sacks, so that - without having to change this device and the associated Sackherstell compiler - the inventive method is feasible and bags according to the invention can be produced.
  • the subject matter of the present invention is also a device for producing sacks from pieces of hose into which the described device for producing ground cover sheet material can be integrated.
  • a winding device is not provided in this case, since the ground cover sheet produced with the described devices, devices and units can be separated directly to ground cover sheets, which are then fed to the ground cover sheet station.
  • a preferred device for the production of sacks from hose pieces is described in WO 2009/121842 A1 of the applicant. The content of this document is hereby incorporated by reference into this application in order not to have to repeat the individual device components and method steps for bag production at this point.
  • This device can be associated with a device for the production of ground cover sheet material and then forms a device according to the invention for the production of bags from hose pieces.
  • FIG. 1 partial view of a bag with reared bottom
  • FIG. 2 partial view of a bag with folded tabs of
  • Fig. 3 is a base sheet for the preparation of an inventive Ground cover sheet
  • FIG. 6 View VI - VI of Fig. 5 seen from the hose interior
  • FIG. 7 Perspective view of a bag according to the invention
  • Fig. 8 is a plan view of a cover sheet with circular bottom cuts
  • Fig. 9 top view of a cover sheet with angular cuts
  • FIG. 10 side view of a bag with escaping air
  • Fig. 1 view of an apparatus for producing a ground cover sheet web
  • FIG. 12 Perspective view of the device of Fig. 1 1
  • Fig. 1 shows a partial view of a piece of hose or a bag 1, which consists for example of a flattened circular fabric of stretched plastic tapes, which was provided after the flattening process with a plastic coating.
  • the end portion of the tube piece 1 has already been raised to a Boden rectangle 2.
  • the two superimposed walls of the piece of tubing, which arise during the flattening process are folded over a fold line 3, which also represents the bottom center line of the subsequent floor, so that the resulting machines 4, 5 are then in one plane.
  • the tabs 4 and 5 then form the Boden rectangle.
  • the triangular pockets 6 and 7 are formed in the side regions.
  • On one of the triangular pockets in the case shown on the triangular pocket 7, is a valve leaflet, from which a valve is later formed, or a valve 8 is placed. About this valve 8, the bag can be filled later.
  • FIG. 3 shows the base sheet 12, which has a width B which is at least twice as large as the desired width BD of the subsequent bottom cover sheet (see FIG. 7).
  • the material of the base sheet 12 is preferably the material of the bag 1, so a fabric of plastic tape.
  • the base sheet is in contrast to the piece of tubing preferably from one layer and may be coated on one side. The material in this case is impermeable to air.
  • breakthroughs 13 can be seen, which are preferably circular and which are preferably introduced by means of at least one punching device.
  • the breakthroughs can therefore also be referred to as punched out.
  • the breakthroughs with other devices such as a laser cutter can be produced.
  • the openings 13 are arranged on the base sheet 12 so that they are later on the opening 1 1 of the soil. Only then can the air that passes through the opening 1 1, also pass through the openings 13.
  • the forces which are symbolized by the arrows F and F '.
  • the shape and size of the openings should be chosen so that the durability of the base sheet is limited only to a reasonable extent.
  • break-through areas 14 are provided as possible.
  • the base sheet 12 is already provided with traces of adhesive.
  • These traces of adhesive comprise longitudinal traces of adhesive 15 and transversely extending traces of adhesive 16.
  • Each two traces of adhesive 16 and portions of the two adhesive tracks 15 surround a breakthrough 13.
  • Such an arrangement of traces of adhesive ensures a secure attachment of an air-permeable sheet or a sheet and prevents air and / or contents can escape laterally under the filter paper.
  • the area enclosed by the traces of adhesive surface is preferably twice as large as the area of the apertures 13.
  • the non-piercing regions 14 may be surrounded by traces of adhesive.
  • base sheets 12 are employed. This applies in particular if several base sheets 12 are transported together, for example as a web.
  • FIG. 4 shows the base sheet 12 from FIG. 3, but with a glued-on slip 17 made of air-permeable material, which forms the second layer of the later ground cover sheet.
  • the slip 17 can be made contiguous, such as in the form of a train available. In the figure 4 this note is shown with a hatching.
  • the adhesive tracks 15, 16, which are not visible per se, and the apertures 13 are nevertheless shown.
  • the note 17 consists for example of coarse-pored filter paper, which allows very good air pass, but holds back the contents.
  • the filter paper per se can not absorb the forces F and F '. Stretchability, however, offers a great advantage. In pressure surges, as they can occur when filling or dropping a bag, the air passes through the opening 1 1 and the openings
  • FIG. 4 the lateral sections 18 and 19 of the base sheet 12 are shown, wherein in the vicinity of one of the two outer edges, in the example shown in the vicinity of the edge of the section 18, a further longitudinal adhesive trace 20 is applied.
  • the two lateral sections 18 and 19 are now turned around edges running in the x-direction so that their edges overlap and the adhesive track 20 lies between them. This is shown in FIG.
  • the now not visible adhesive trace 20 is shown here with broken lines.
  • the lateral areas which now form a third layer 22, have different functions. First, they protect the slip 17 from damage and moisture. In addition, they can be used as information carriers. For this purpose, prints can be applied to the basesheets 12 even before their processing. The already mentioned several times as an example coatings on fabric of plastic tapes are a well-suited substrate for printing. An example of a print motif 23 is shown.
  • FIG. 6 now shows a rear view of the generated cover sheet 21. Through the openings 13 of the note 17 can be seen. There is seen a hatched area representing a part 24 provided with a release agent.
  • a release agent is particularly advantageous when the ground cover sheet 21 by means of a heat-induced joining method on the Sack bottom is applied.
  • the bottom cover does not connect to the inner surfaces of the bag.
  • a release agent is in this case a release coating, which can be applied to the processing of the base sheet 12 with a known printing method and by means of a printing device on this.
  • the provided with the release agent surface 24 is preferably congruent with the opening 1 1 of the already folded trays.
  • the surface 24 may also be slightly larger than the opening 1 1 to compensate for manufacturing inaccuracies.
  • the label 17 is expediently also acted upon by a release agent or consists of a material which does not connect to the adhesive or joining process with the inner surfaces of the bag.
  • FIG. 7 shows a section of a finished bag 1, which comprises the finished bag bottom 25, in which the bottom cover sheet 21 has been applied, in particular sealed. Dotted the position of the apertures 13 is shown, with dash-dotted line the position of the tabs 4 and 5. This view illustrates that the openings 13 are in the region of the opening 1 1, which is limited by the tabs 4 and 5 substantially. With a broken line, the position of the valve 8 is shown, the edge also represents a limit for the opening 1 1. The print motif 23 is not shown in this figure.
  • FIG. 8 shows the plan view of another bottom cover sheet 21, which can be used for a further embodiment of the invention.
  • the third layer 22 of the bottom cover sheet 21st With a broken line, the openings 13 of the first layer are shown, which are circular in the embodiment of FIG. Concentric to this circumferential line of the apertures 13 arcuate cuts 26 are provided. By means of these cuts 26 tabs 27 are generated, which can now be lifted off from the third layer, so that the slip 17 can come into direct contact with the environment. The passing through the paper 17 passing air can thus be delivered in a simple way directly to the environment. Shown is that the cuts 26 have a distance to the circumferential lines of the openings. Each incision may occupy a certain angular range, which may be 135 degrees, for example. It follows that the angular range in which the tabs are attached to the third layer is two times 45 degrees.
  • FIG. 9 shows a further embodiment of the invention.
  • the openings 13 are shown as squares.
  • the cuts 26 are formed angular. Shown again is an example in which the cuts 26, the openings 13 surrounded with some distance.
  • FIGS 1 1 and 12 now show a device 30 for the production of bottom cover sheets 21, as shown in Figures 3 to 6.
  • the device initially comprises a first unwinding point 31, in which a winding 32 can be stored rotatably.
  • a base material web 33 is wound, which is the basis for the later bottom cover sheets 21.
  • the base material web 33 is already provided at the desired locations with a release agent and / or with one or more print motifs.
  • a separate printing machine is recommended, since the often desired multicolor printing makes a device necessary, which would unnecessarily increase the device 30 and thus make it more expensive.
  • the printing of the web can sometimes be done much faster in separate printing presses.
  • a printing unit with which the release agent can be applied. Since in the present embodiment of Figures 3 to 6 release agent and print motif is printed on the same side of the web, it is expedient to apply the release agent simultaneously with the print motif in a printing press. Therefore, in Figure 8, a printing unit for applying a release agent is not shown.
  • the web 33 After unwinding, the web 33 first passes through a sensor 34, such as a photo key, with which the position of the print motifs or the release agent orders can be detected.
  • a sensor 34 such as a photo key
  • the web 33 can also be provided with register marks for this purpose.
  • the punching device 35 and adhesive unit 36 described below are controllable, so that punching and adhesive jobs can be done in register.
  • the photo sensor 34 follows in the transport direction A, a punching device 35, with which the openings 13 in the web 33 can be introduced.
  • the cuts 26 can be produced with this or with a similar punching device.
  • the punching device 35 can be circumferential, that is, the punching knife or the can be arranged on a roller, so that the web is transportable at a uniform speed.
  • the punching device 35 can also comprise sinkable and liftable punching blades. Since the web must be at a standstill in this case, at least one web storage device, not shown, may be provided so that the web, despite the standstill of the angle continuously unwound and / or is providable continuously with an adhesive application.
  • the punching device 35 further comprises a likewise not shown suction device, with which incurred punching waste can be sucked.
  • the punching device is followed by an adhesive unit 36, with which the adhesive tracks 15 and 16 can be applied.
  • the adhesive trace 20 can also be applied to the adhesive aggregate 36.
  • a further adhesive aggregate can be provided, which is arranged directly in front of the hose forming station.
  • the adhesive used may be of the "hotmelt" type, but also other types of adhesives that have cold bonding allow, may be appropriate.
  • the adhesive can be applied with a cliché roller 37.
  • a cliché roller comprises in height varied (elevations or depressions) and adhesive-carrying areas whose contour corresponds to the desired adhesive application.
  • it can also be provided a nozzle system in which the adhesive flow with valves on and off. In this way, also the desired traces of adhesive can be applied. Cliché rolls and nozzle systems as such are known to the person skilled in the art and are therefore not further described here.
  • a web 41 containing air-permeable material is now applied to the adhesive-provided web 33.
  • the web 41 is provided in the form of a roll 42.
  • the web 41 is unwound from the winding 42 and fed to the Georgia foundedstation 38 via a plurality of guide rollers 44.
  • the web composite formed in the station 38 is now fed to a hose forming station 45, in which the lateral sections 18 and 19 of the later bottom cover sheets are folded over and their edge regions are glued together.
  • the tube 48 thus produced which may also be referred to as a cover sheet, initially passes the preference 46.
  • This comprises a pair of rollers 47, through the nip of the hose runs and the hose with the for the transport and transport of the not yet merged tracks 33rd and 41 required driving force applied.
  • the tube 48 can be wound up in a winding device 49 to form a winding 50.
  • the thus produced winding with web-shaped cover sheet material can now be brought to a Sackherstellmaschine.
  • Conventional sack-making machines as shown in FIG. 1 of the already mentioned WO 2009/121842 A1, typically include unwinding devices that are populated with wound on cover sheet material. Within the sack making machine, the web is singulated into individual topsheets and secured to the bottoms of sacks. This procedure has proven itself for years.
  • the bag making machine need not be changed.
  • the cover sheet material produced in a described device 30 can be processed in a known manner in a bag making machine. In order to be able to save the winding up of the finished cover sheet, the device 30, reduced by the winding device 49, can take the place of the unwinding devices of the bag making machines.
  • FIG. 12 shows a perspective view of the device 30 according to FIG. 8. Although it is a schematic illustration, it can be seen that the web 33 has a greater width than the web 41.
  • the present application discloses a variety of features and embodiments related to methods, products, and devices of the present invention. Although various features and embodiments are disclosed only in connection with certain other features and embodiments, all features and embodiments are to be considered as freely combinable with one another without the need for explicit mention of these feature combinations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

L'invention concerne un procédé permettant de fabriquer des sacs à partir de pièces tubulaires (1) qui contiennent une matière plastique. Selon ce procédé, au moins sur une zone d'extrémité autour d'une ligne de pliage (3), un rectangle de fond (2) est façonné, formant ainsi des poches triangulaires (6, 7) et comporte des secteurs (4, 5); des parties des secteurs (4, 5) du rectangle de fond (2) sont rabattues; et une feuille de recouvrement de fond (21) est posée au moins sur certaines zones des secteurs (4, 5) du rectangle (2) et/ou sur certaines zones des poches triangulaires (6, 7) et est reliée à celles-ci. Selon l'invention, une feuille de recouvrement de fond (21) contenant au moins en partie un matériau perméable à l'air est utilisée.
EP11743555.2A 2010-08-25 2011-08-15 Sac et procédé de fabrication de sacs Not-in-force EP2608954B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11743555.2A EP2608954B1 (fr) 2010-08-25 2011-08-15 Sac et procédé de fabrication de sacs

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US34458110P 2010-08-25 2010-08-25
DE102010039770A DE102010039770A1 (de) 2010-08-25 2010-08-25 Sack sowie Verfahren und Vorrichtung zur Herstellung von Säcken
EP10189481 2010-10-29
EP11743555.2A EP2608954B1 (fr) 2010-08-25 2011-08-15 Sac et procédé de fabrication de sacs
PCT/EP2011/064004 WO2012025413A2 (fr) 2010-08-25 2011-08-15 Sac, procédé et dispositif de fabrication de sacs

Publications (2)

Publication Number Publication Date
EP2608954A2 true EP2608954A2 (fr) 2013-07-03
EP2608954B1 EP2608954B1 (fr) 2017-03-15

Family

ID=45723850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11743555.2A Not-in-force EP2608954B1 (fr) 2010-08-25 2011-08-15 Sac et procédé de fabrication de sacs

Country Status (4)

Country Link
US (1) US9205957B2 (fr)
EP (1) EP2608954B1 (fr)
BR (1) BR112013004340A2 (fr)
WO (1) WO2012025413A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3269539B1 (fr) * 2016-07-14 2019-02-20 Starlinger & Co. Gesellschaft m.b.H. Dispositif destiné à ouvrir une zone d'extrémité d'un corps de sachet tubulaire
DE202017001357U1 (de) * 2017-03-13 2018-06-14 Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh Mehrlagiger Ventilsack
CN109228525B (zh) * 2018-08-30 2024-04-16 浙江正威机械有限公司 塑料立体袋片料的底部补片对折装置
KR101941897B1 (ko) * 2018-12-18 2019-04-12 최상필 분해성 필름을 이용한 교체형 음식물 거름망 제조장치 및 그 제조방법
WO2022026782A1 (fr) * 2020-07-30 2022-02-03 The Procter & Gamble Company Matériau d'emballage d'article absorbant avec des fibres naturelles
WO2022026783A1 (fr) 2020-07-30 2022-02-03 The Procter & Gamble Company Matériau d'emballage d'article absorbant avec fibres naturelles

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Publication number Priority date Publication date Assignee Title
US333523A (en) * 1886-01-05 honiss
US1121080A (en) 1912-05-11 1914-12-15 Sterling Elliott Machine for making stencil-strips.
US1867399A (en) 1931-06-11 1932-07-12 Harmon P Elliott Method of making stencil frames
DE1761327A1 (de) 1968-05-04 1971-07-22 Hans Lissner Entlueftbarer sackartiger Behaelter und Verfahren zu dessen Herstellung
US3853040A (en) * 1972-05-02 1974-12-10 Windmoeller & Hoelscher Process and apparatus for making crossed-end bags from weldable material
DE2323726A1 (de) * 1973-05-10 1974-11-21 Windmoeller & Hoelscher Kreuzbodensack
US3924521A (en) * 1974-05-22 1975-12-09 Violet M Hanson Method for forming flat bottom plastic bags
DE8337443U1 (de) * 1983-12-28 1984-02-02 Bischof Und Klein Gmbh & Co, 4540 Lengerich Ventilsack aus Kunststoffolie
DE4014600A1 (de) * 1990-05-07 1991-11-14 Windmoeller & Hoelscher Verfahren zur herstellung eines sacks oder beutels mit im gefuellten zustand rechteckigem boden und angesetztem griffteil
DE9217023U1 (de) 1992-12-15 1993-07-08 Nord-West Verpackung GmbH, 51789 Lindlar Verpackungsbeutel aus Papier oder Kunststoff
EP0767105B1 (fr) 1995-10-02 1999-04-14 Korsnäs Wilhelmstal GmbH Papiersackfabriken Sac à valve à fond croisé ventilé
DE102006004291A1 (de) 2006-01-31 2007-08-09 Windmöller & Hölscher Kg Sack und Verfahren zur Herstellung desselben
DE102008017442B4 (de) 2008-04-03 2013-01-17 Windmöller & Hölscher Kg Vorrichtung und Verfahren zur Herstellung von Säcken, welche Gewebe aus gereckten Kunststoffbändchen umfassen
DE102008017446A1 (de) * 2008-04-03 2009-10-15 Windmöller & Hölscher Kg Vorrichtung und Verfahren zur Herstellung von Säcken
DE202009007915U1 (de) 2009-06-05 2009-08-20 Worff, Herwig, Dipl.-Ing. Sack

Also Published As

Publication number Publication date
BR112013004340A2 (pt) 2016-05-31
EP2608954B1 (fr) 2017-03-15
US9205957B2 (en) 2015-12-08
US20130156352A1 (en) 2013-06-20
WO2012025413A2 (fr) 2012-03-01
WO2012025413A3 (fr) 2012-05-10

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