AT3728U1 - Sack and sealing method for sacks - Google Patents

Sack and sealing method for sacks Download PDF

Info

Publication number
AT3728U1
AT3728U1 AT0048299U AT48299U AT3728U1 AT 3728 U1 AT3728 U1 AT 3728U1 AT 0048299 U AT0048299 U AT 0048299U AT 48299 U AT48299 U AT 48299U AT 3728 U1 AT3728 U1 AT 3728U1
Authority
AT
Austria
Prior art keywords
sack
folded
bag
bags
welding
Prior art date
Application number
AT0048299U
Other languages
German (de)
Inventor
Huemer Franz Starlinger
Original Assignee
Starlinger & Co Gmbh
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
Application filed by Starlinger & Co Gmbh filed Critical Starlinger & Co Gmbh
Priority to AT0048299U priority Critical patent/AT3728U1/en
Publication of AT3728U1 publication Critical patent/AT3728U1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D33/00Details of, or accessories for, sacks or bags
    • B65D33/16End- or aperture-closing arrangements or devices
    • B65D33/18End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
    • B65D33/22End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using heat-activatable adhesive
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D31/00Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/10Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides

Abstract

The invention relates to a method for closing open ends or edges of bags, in particular cushioned bags (1) or gusseted bags (10), or of bag bodies (2, 12) for their production by gluing or welding. The gluing or welding (indicated at 4) takes place between the sack (1, 10) or sack body (2, 12) and the end (2c, 12c) of the sack or sack body, which is folded back at least twice onto the sack or sack body. A sack according to the invention has at least one edge or end region (2c, 12c) which is folded back onto the sack body (2, 12) at least twice, the sack body and the at least one edge or end region on their respective mutually facing surfaces are welded or glued together (indicated at 4).

Description


   <Desc / Clms Page number 1>
 



   The invention relates to a method for closing open ends or edges of bags, in particular cushioned bags or gusseted bags, or of bag bodies for their production by gluing or welding. The invention further relates to sacks, in particular upholstery sacks or gusseted sacks.



  Upholstery bags and gusseted bags for the packaging industry are conventionally manufactured in such a way that first of all from a suitable material, such as. B. paper or plastic, tubular bag body are formed which have opposite open ends. One of these ends is then closed by one or more seams and thus forms the bottom of the sack so produced.



  After the sack has been filled, the upper end of the sack is usually also closed by a seam.



  A disadvantage of this procedure is that, of course, the sack material is weakened by the needle punctures due to the sewing and, moreover, the sack leaks. In addition, sewing machines are prone to failure and have low working speeds.



  The present invention overcomes the aforementioned problems by providing a method for closing open ends or edges of bags, in particular cushioned bags or gusseted bags, or of bag bodies for their production by gluing or welding, which is characterized in that the gluing or welding between the bag or sack body and the end of the sack or sack body which is at least double folded back onto the sack or sack body and is to be closed.



  By folding the open end at least twice, this end is tightly closed, and the welding or gluing of the facing surfaces of the twice or more times folded end and the bag body does not impair the strength of the bag material at the adhesive or welding point.

 <Desc / Clms Page number 2>

 



  Due to the at least two folds, the adjacent layers of the sack body material are pressed against each other and thus secured against slipping and already absorb a large part of the load exerted by the weight of the filling material on the end of the sack, so that the gluing or welding only a fraction of those Must withstand forces that conventional sacks on a seam, for. B. the bottom seam of a sack, act.



  According to the invention, the gluing can be carried out by introducing an adhesive layer, preferably a hot-melt adhesive, between the sack or sack body and the end of the sack or sack body folded back at least twice onto the sack or sack body.



  As an alternative to this, in a further embodiment of the invention the gluing can be carried out by applying an adhesive layer to at least one predetermined contact surface of the sack or sack body and / or the end of the sack or sack body to be folded back, followed by at least double folding back of the end to be closed onto the sack or sack body . If the adhesive layer is applied to both contact surfaces, a two-component adhesive can be used.



  The welding is preferably carried out by means of a hot air nozzle if the sack or sack body has a meltable layer at least on its outside.



    The invention also relates to a sack, in particular an upholstery sack or gusseted sack, which is characterized in that it has at least one edge or end region, which is folded back at least twice onto the sack body and the sack body and the at least one edge or end region their respective mutually facing surfaces are welded or glued together.

 <Desc / Clms Page number 3>

 



   A particularly advantageous embodiment of the sack according to the invention is characterized in that the sack body is tubular and forms an end region of the sack body that is at least double folded back onto the sack body and welded or glued to the sack body on its mutually facing surfaces.



  The sack according to the invention preferably consists of paper, plastic film or plastic fabric, wherein coatings can be provided on the outer surfaces of the sack material.



  The invention will now be explained in more detail using two exemplary embodiments. 1 shows an upholstery bag according to the invention in a perspective view, FIG. 2 shows a longitudinal section through the bag from FIG. 1 along the line AA, FIG. 3 shows a side gusset bag according to the invention in a perspective view, and FIG. 4 shows a longitudinal section through the bag 3 along the line BB.



  First referring to the upholstery bag 1 shown in FIGS. 1 and 2, this bag 1 has a tubular bag body 2 which is formed from two material webs 2a, 2b lying one above the other. The material of the sack can consist of paper or plastic, whereby plastic can be used either in the form of foils or of fabric made of plastic tapes. Optionally, a coating can be applied to at least one surface of the material webs, which can be sealing anti-rust coatings etc. Composite materials made of paper and plastic can also be used.

   The tubular sack body 2 can either be produced by superimposing or longitudinally folding flat webs and connecting the webs on the longitudinal edges, or can be provided particularly expediently by providing round woven fabric or plastic film.

 <Desc / Clms Page number 4>

 



  The lower end of the cushion bag 1 forming the bottom 1a is closed according to the invention in that the lower end 2c of the bag body 2 is first folded back by 180 to the bag body and then folded back again by 180 to the bag body and the mutually facing surfaces of the bag body end 2c and the bag body 2 are glued or welded together (indicated at 4). In principle, gluing is possible with all sack materials, whereby suitable one or two-component glue can be used for the material. It is particularly preferred to use hot melt adhesives which are outstandingly suitable for both paper and plastic, in particular for uncoated fabric bags.



  In the case of plastic bags, in most cases it is appropriate to weld the bag body with its end by fusing the adjacent surface layers. Welding is particularly advantageous in the case of film bags and plastic-coated fabric bags. The welding can either be carried out by introducing a hot plastic melt between the surfaces of the sack body and the end of the sack body after being folded twice, but it is particularly preferably carried out by means of a hot air nozzle which, after being folded twice, blows hot air between the surfaces mentioned and thus up to a predetermined one Material depth melts, followed by pressing the melted surfaces together.



  Compared to sewing the sack bottom, as is known from the prior art, the closing method according to the invention offers the advantage that the sack material is not damaged by needle punctures and that no sewing machine susceptible to faults has to be used in the production line.



  The method according to the invention can be used both for producing a base on a sack body and for closing a sack after it has been filled. In the latter case there is an additional advantage in that

 <Desc / Clms Page number 5>

 the gluing or welding takes place only on the outside of the bag body, so that no contamination of the filling material of the bag can take place.



  FIGS. 3 and 4 show a further embodiment of a sack according to the invention, namely a gusseted sack 10. This exemplary embodiment shows that it is also possible to close sacks according to the method according to the invention in which more than two layers of material are present at the end of the sack body or where the number of layers of material varies.



  The gusseted sack 10 is formed by folding a tubular sack body 12 inwards at its side edges and then closing the lower open end of the sack body. The result of this is that four sack body layers have to be connected to one another at the edge regions 10a, 10c, while there are only two layers in the central region 10b. Fig. 4 shows a section of an edge region 10a of a gusseted bag 10 along the line B-B of Fig.3.

   It can be seen that in the same way as in the case of the upholstery bag described above, the lower end of the gusseted bag 10, which forms the bottom, is closed according to the invention by first folding the lower end 12c of the bag body 12 back onto the bag body by 180 and then a further time by 180 the bag body is folded back and the mutually facing surfaces of the bag body end 12c and the bag body 12 are glued or welded to one another (indicated at 4). The same applies to the gluing or welding as well as the bag materials, as stated above in the explanation of the upholstery bag.



  If the bag body is produced from flat webs, it is also possible to produce the connection of the longitudinal edges of the webs lying one above the other by the method according to the invention.

Claims (6)

  1.  Expectations : 1. Method for closing open ends or edges of bags, in particular Padded bags (1) or gusseted bags (10), or of bag bodies (2, 12) to them Production by welding, welding (indicated at 4) being carried out between the sack (1, 10) or sack body (2, 12) and the end (2c, 12c) of the sack or sack body that is to be closed and folded back at least twice onto the sack or sack body is characterized in that a meltable layer is provided at least on the outside of the sack or sack body and the welding is carried out by means of a hot air nozzle.
  2. 2. The method according to claim 1, characterized in that the fusible layer of an adhesive layer, preferably a hot melt adhesive, is applied between the sack or sack body and the end of the sack or sack body folded back at least twice onto the sack or sack body.
  3. 3. The method according to claim 1, characterized in that as a fusible layer, an adhesive layer, preferably a hot melt adhesive, on at least one predetermined contact surface of the sack or sack body and / or the end of the sack or sack body to be folded back, followed by at least double folding back of the closing end is applied to the sack or bag body.
  4. 4. Sack, in particular an upholstered sack (1) or gusseted sack (10), the sack (1,10) having at least one edge or end region (2c, 12c) which is folded back onto the sack body (2,12) at least twice , characterized in that the sack body and the at least one edge or end region are welded to one another on their respective mutually facing surfaces according to the method according to one of claims 1 to 3 (indicated at 4).  <Desc / Clms Page number 7>  
  5. 5. Sack according to claim 4, characterized in that the sack body (2, 12) is tubular and an end region (2c, 12c) of the sack body that is at least twice folded back onto the sack body and welded or glued to the sack body on the mutually facing surfaces (1a; 10a-10c) bi Idet.
  6. 6. Sack according to claim 4 or 5, characterized in that it consists of plastic film or fabric.
AT0048299U 1999-07-14 1999-07-14 Sack and sealing method for sacks AT3728U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT0048299U AT3728U1 (en) 1999-07-14 1999-07-14 Sack and sealing method for sacks

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT0048299U AT3728U1 (en) 1999-07-14 1999-07-14 Sack and sealing method for sacks
BR0006935A BR0006935B1 (en) 1999-07-14 2000-07-11 bag and method for closing open ends or edges of bags.
PCT/AT2000/000192 WO2001005671A1 (en) 1999-07-14 2000-07-11 Bag and method for closing bags
EP20000951083 EP1113966A1 (en) 1999-07-14 2000-07-11 Bag and method for closing bags

Publications (1)

Publication Number Publication Date
AT3728U1 true AT3728U1 (en) 2000-07-25

Family

ID=3491782

Family Applications (1)

Application Number Title Priority Date Filing Date
AT0048299U AT3728U1 (en) 1999-07-14 1999-07-14 Sack and sealing method for sacks

Country Status (4)

Country Link
EP (1) EP1113966A1 (en)
AT (1) AT3728U1 (en)
BR (1) BR0006935B1 (en)
WO (1) WO2001005671A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060269173A1 (en) * 2005-05-25 2006-11-30 Uwe Koehn Side fold sack with roll bottom
MX2012003786A (en) * 2009-10-02 2012-06-19 Graphic Packaging Int Inc Heat sealing systems and methods, and related articles and materials.
US8826959B2 (en) 2006-06-29 2014-09-09 Graphic Packaging International, Inc. Heat sealing systems and methods, and related articles and materials
US8753012B2 (en) 2006-06-29 2014-06-17 Graphic Flexible Packaging, Llc High strength packages and packaging materials
AT9823U1 (en) * 2007-09-10 2008-04-15 Starlinger & Co Gmbh Coated fabric from monoaxally suppressed plastic belts and sack therefor
DE102009056078B8 (en) * 2009-11-30 2012-06-14 Windmöller & Hölscher Kg Method and apparatus for making pinch sacks and station for forming pinch floors
FR2974068B1 (en) 2011-04-14 2014-03-14 Dune Machine and method for baging extended food products and bagging bag used in such a machine
DE102012101932A1 (en) 2012-03-07 2013-09-12 Nordenia Deutschland Halle Gmbh Side gusset bags made of a plastic fabric composite and method for its production
ES2820708T3 (en) 2016-08-30 2021-04-22 Mondi Ag Process for the manufacture of a product composed of plastic fabric sheets, made of plastic fabric sheets, as well as a packaging bag from a plastic fabric sheet compound

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6502591A (en) * 1964-03-10 1965-09-13
GB1239906A (en) * 1967-09-19 1971-07-21 Robinson E S & A Ltd A method of making bags of paper or like sheet material
GB1369444A (en) * 1971-11-29 1974-10-09 Dickinson Co Ltd John Paper or like bags
FR2178397A5 (en) * 1972-03-30 1973-11-09 Aquitaine Total Emballag
CH607627A5 (en) * 1975-05-07 1978-09-29 Jagenberg Werke Ag
US4323189A (en) * 1980-05-27 1982-04-06 Arvey Corporation Closable pouch

Also Published As

Publication number Publication date
BR0006935B1 (en) 2010-07-27
EP1113966A1 (en) 2001-07-11
WO2001005671A1 (en) 2001-01-25
BR0006935A (en) 2005-04-12

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MN9K Cancelled due to lapse of time