EP2805896A1 - Verstärkter Sack - Google Patents

Verstärkter Sack Download PDF

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Publication number
EP2805896A1
EP2805896A1 EP13188301.9A EP13188301A EP2805896A1 EP 2805896 A1 EP2805896 A1 EP 2805896A1 EP 13188301 A EP13188301 A EP 13188301A EP 2805896 A1 EP2805896 A1 EP 2805896A1
Authority
EP
European Patent Office
Prior art keywords
ply
sack
patches
end portion
sacks
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.)
Withdrawn
Application number
EP13188301.9A
Other languages
English (en)
French (fr)
Inventor
Sture Nilsson
Robert Zakrisson
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.)
Billerudkorsnas AB
Original Assignee
Billerudkorsnas AB
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 Billerudkorsnas AB filed Critical Billerudkorsnas AB
Priority to EP13188301.9A priority Critical patent/EP2805896A1/de
Publication of EP2805896A1 publication Critical patent/EP2805896A1/de
Withdrawn legal-status Critical Current

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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
    • B65D33/02—Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames
    • 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
    • B31B70/008—Stiffening or reinforcing
    • 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
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/001—Flexible containers made from webs by folding webs longitudinally
    • B31B2155/0012—Flexible containers made from webs by folding webs longitudinally having their openings facing in the direction of movement
    • 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/812—Applying patches, strips or strings on sheets or webs
    • B31B70/8122—Applying patches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/812—Applying patches, strips or strings on sheets or webs
    • B31B70/8123—Applying strips

Definitions

  • the present disclosure relates to sacks and the production thereof.
  • it relates to paper sacks for powdery or granularly material for the construction industry.
  • Paper sacks are used for holding a powdery or granularly material, such as cement, building materials, powdered goods for the construction industry, ready-mix building materials, chemicals, minerals or garden fertilizers. Paper sacks may also be used for holding food, animal feed or pet food. Some examples are sugar, flour, rice, potatoes, or seeds.
  • each ply is normally composed of a paper with relatively high tensile strength.
  • the sacks are normally required to meet high standards. Firstly, the sacks need to hold a considerable material weight. Secondly, a material such as cement is sensitive moisture contamination during storage. Hence, the sacks normally require a protection against water and atmospheric vapor penetration. This may be achieved by applying a moisture barrier coating on one or more of the plies and/or incorporating a film as an intermediate layer in the sack, e.g. between the inner and outer plies of a two-ply paper sack.
  • the moisture barrier is typically a plastic film, e.g. of polyethylene (PE), that is impermeable to water.
  • PE polyethylene
  • the coating or film may also improve resistance to grease and prevent contamination by microorganisms.
  • the sacks are often filled with powdery material through a valve.
  • the air that accompanies the powdered material must vent from the sack. This limits the rate at which the bags can be filled. Air trapped in the sack might also lead to under-weight packs, bag rupture and problems when bags are stacked for transportation.
  • the only way for air to escape from the interior of the bag is in most bag designs through the walls of the sack. Therefore, paper of high porosity is often used in the manufacture of sacks to provide the air permeability. If the air permeability of sack walls is further improved, filling pressure and filling speed may be increased. However, an increased porosity normally results in a decrease in the overall strength of the paper. Therefore, the selection of a paper material is often a compromise between tensile strength and porosity.
  • One type of paper frequently selected for paper bags is Kraft paper.
  • Paper sacks for cement or similar materials are often produced from reels of paper (each reel providing the paper of one ply) at the site of a sack converter.
  • the layered paper plies are then folded into a flattened tube. In the tubing, an overlap is formed and glue is provided at the overlapping portions such that a longitudinal seam is formed.
  • the continuous tube is then divided into tube sections corresponding to individual sacks. At least one end of each tube section is then closed by folding and gluing in a well-known manner. Extra paper material may be glued to the folded end so as to strengthen the sack construction and provide further protection as well as a printing surface. One end of the sack may be left open for later filling.
  • both ends are closed, but one end is adapted to receive a filling spout of a filling machine so as to allow automatic filling of the sack.
  • Such sacks are called valve sacks.
  • the sacks which are still flat, are then stacked, normally on a pallet, and transported to the filling site, which may be the site where the sack content, such as cement, is also produced.
  • the filling site which may be the site where the sack content, such as cement, is also produced.
  • air is vented through the walls of the sacks or through a specific venting mechanism providing in the sacks.
  • the filled sacks are then transported and handled in various stages, during which the sack should resists various types of impacts and protect the contents against moisture and possible grease and air, as discussed above.
  • sacks can be made more resistant to breakage by reinforcing the area around the four edges defined by the short sides of the rectangular end portions.
  • a drop test experiment described in more detail below the inventors found that a two-ply paper sack on average survived about 10 drops in a drop tester without breakage, while a three-ply paper sack on average survived about 30 drops.
  • a two-ply sack reinforced with the same material as used for the plies also survived about 30 drops on average, even tough the material consumption for the reinforcements was only 34 % of that for the third ply. Consequently, the present disclosure may provide for a significant reduction in material consumption.
  • the reinforcement material which only covers a part of the sack walls through which air is vented during filling, can have lower air permeability than the ply material while the sacks still efficiently vents air during filling. Accordingly, the invention opens for the use of new materials in the sack that are stronger and less porous than the traditional ply materials. It is thus contemplated that a reinforced two-ply sack can be made more impact resistant than a three-ply sack without impairing the air venting capability.
  • the reinforcement of the present disclosure is also beneficial as the edges in question are more exposed to contact than other parts of the sack, in particular when the filled sacks are stacked.
  • a single- or multiple-ply sack comprising a wall portion, a first end and a second end, wherein at least the first end is closed by folding and optionally gluing to form a first substantially rectangular end portion having a first and a second short side, wherein the sack is reinforced by patches covering the edges defined by the short sides of each rectangular end portion. The patches only cover a part of the wall portion.
  • a sack may be a single-ply sack or a multiple-ply sack, e.g. a sack comprising two, three or four plies.
  • the sack comprises a wall portion, a first end and a second end, wherein at least the first end is closed by folding and optionally gluing to form a first substantially rectangular end portion having a first and a second short side.
  • the sack comprises a closed end portion.
  • the other end may also be closed by folding and optionally gluing, which is normally the case with "valve sacks”.
  • the second end is closed by folding and optionally gluing to form a second substantially rectangular end portion having a first and a second short side.
  • the other end may alternatively be left open.
  • sack is often referred to as an "open mouth sack”.
  • the gluing is optional.
  • Another technique for fixing the folding pattern at the end(s), such as sewing, may also be employed.
  • At least one end portion of the sack is rectangular.
  • the section from which the end portion is formed may have a hexagonal shape when the sack is in a flattened configuration before filling (see figure 3 ).
  • the section from which the end portion is formed may also have the rectangular shape already in the flattened configuration (see figure 2 ).
  • the sack is reinforced by patches covering edges defined by the short sides of each rectangular end portion. Thereby, the most critical parts of the sack are strengthened.
  • the patches are thus covering part of the wall portion of the sack and part or all of the closed end portion(s). This means that part of the wall portion is left uncovered by the patches.
  • the patches cover less than 60 % of the wall portion, such as less than 50 % of the wall portion, such as less than 40 % of the wall portion, such as less than 30 % of the wall portion.
  • the partial coverage of the patches may also be expressed as the relation between the total area of the patches and a ply of the sack.
  • the total area of the patches may be 5-60 %, such as 10-50 %, such as 20-40 %, such as 25-40 % of the area of a ply of the sack.
  • the reinforcement patches cover any point in the end portion(s) or wall portion within 1 or 2 cm of the edges in question.
  • the material of the patches can be any type of flexible sheet material.
  • the patches are composed of paper.
  • the patches may be composed of other woven or non-woven fibrous sheet material, such as a material comprising plastic and/or textile fibers.
  • the tensile strength of the patch material is preferably at least 3 kN/m, such as at least 4, 5, 6 or 8 kN/m, according to Tappi 494.
  • the ply material is preferably paper, such as Kraft paper.
  • Gurley porosity value of the paper may be less than 25 Gurley seconds, such as less than 20, 17, 15 or 12 Gurley seconds, acoording to Tappi 460 (a lower Gurley seconds value means a higher porosity).
  • the tensile strength of the ply material (in case of paper both in the machine and the cross direction) is preferably at least 2 kN/m, such as at least 3, 4 or 5 kN/m, according to Tappi 494.
  • the grammage of the ply material may be 30-160 g/m 2 , preferably 50-130 g/m 2 .
  • the reinforcement patches may be composed of a material having a higher tensile strength than the material of the plies.
  • the tensile strength (measured according to Tappi 494) of the reinforcement patches may be at least 10 % higher, such as at least 20 %, 30 % or 50 % higher, than the tensile strength of the strongest ply (sometimes the plies of a multiple-ply sack have different tensile strengths).
  • the Gurley porosity value of the reinforcement patches may be higher than the Gurley porosity value of the plies.
  • the Gurley porosity value of the patches may be at least 10 Gurley seconds higher than the Gurley porosity of the least porous ply of the sack.
  • the stretch value (%) of the reinforcement patches measured according to ISO 1924/3 may be approximately the same as the stretch value of the ply or plies.
  • the stretch value of the reinforcement patches may be within one percentage unit of the stretch value of the ply or plies.
  • the sack is typically a "25 kg sack” or a "50 kg sack", which are the sack sizes most frequently used in the field.
  • the skilled person is thus well aware of the dimensions of a 25 or 50 kg sack.
  • the sack may also be dimensioned for any weight in the range of 10-100 kg.
  • the volume of the sack may for example be in the range of 10-60 liters.
  • the volume of a "25 kg sack” is typically about 17.4 liters.
  • the volume of a "50 kg sack” is typically about 35 liters.
  • the sack may for example be a valve sack or an open mouth sack.
  • the patches comprise a first and a second strip, wherein each strip extends from the first to the second end in the longitudinal direction of the sack.
  • the first strip covers the first short side of the first rectangular end portion and the second strip covers the second short side of the first rectangular end portion (see figure 4 ).
  • the strips are arranged opposite to each other in the filled sack. If the wall portion of a filled sack is considered comprising two opposite wide sides and two opposite narrow sides, the two strips of the present embodiment will normally cover the narrow sides.
  • the first strip When the second end is closed by folding and optionally gluing to form a second substantially rectangular end portion having a first and a second short side, the first strip will normally cover the first short side of the second rectangular end portion and the second strip will normally cover the second short side of the second rectangular end portion.
  • the first strip may cover and extend between the first short side of the first end portion and the first short side of the second end portion, while the second strip may cover and extend between the second short side of the first end portion and the second short side of the second end portion.
  • the patches comprise a first single strip covering both short sides of the first substantially rectangular end portion (see figure 5 ).
  • the patches may comprise a second single strip covering both short sides of the second substantially rectangular end portion. This means that the strips extend in the cross direction.
  • Strips in the cross direction are less preferred from a manufacturing perspective. However, the reinforcing effect is found to be comparable to that of the longitudinal strips.
  • the reinforcement strips of the present disclosure may for example have a width of 100-200 mm, such as 115-170 mm.
  • the reinforcement patches comprise four patches covering one short side of an end portion each (see e.g. figure 6 ).
  • the reinforcement patches are preferably arranged on the inside of the ply.
  • Such patches are preferably glued to the inside of the ply. However, they may also be attached by means of sewing.
  • the reinforcement patches are preferably arranged between the outer ply and the inner ply.
  • the reinforcement patches are preferably arranged between the outer ply and the middle ply or between the middle ply and the inner ply.
  • the closing of the end(s) may be sufficient for keeping the strips in position.
  • such an embodiment requires no extra gluing compared to a conventional multiple-ply sack.
  • the reinforcement patches are arranged on the inside of the innermost ply of a multiple ply sack.
  • each closed rectangular end portion is covered with a patch that extends over the short sides of the end portion to form the reinforcement patches.
  • the reinforcement patches are thus arranged on the outside of the sack.
  • a drawback of such an embodiment is that the sack may be difficult to produce in existing machinery without substantial modifications.
  • a method of manufacturing folded sacks according to the first aspect comprises the steps of:
  • Step i) may for example comprise unwinding a first reel of ply material to provide the first ply and step iii) may for example comprise unwinding a second reel of ply material to arrange the second ply.
  • step ii) comprises arranging two continuous reinforcement strips extending in the machine direction over the first ply.
  • the step may comprise unwinding two reels of reinforcement material to form the two continuous reinforcement strips.
  • the reinforcement material may for example cover 5-60 %, such as 10-50 %, such as 20-40 %, such as 25-40 % of the area of the first ply.
  • Figure 4a shows the layered material corresponding to three reinforced single-ply sacks.
  • a first paper ply 40 is provided.
  • a first 41a and a second 41b reinforcement strip extending in the machine/longitudinal direction are arranged on the first paper ply 40.
  • Glue is preferably applied between the paper ply 40 and the reinforcement strips 41a, 41b.
  • Perforations 42 are provided in the layered material. The continuous stretch of layered material can be torn apart along the perforations 42 to form sections corresponding to individual sacks.
  • Figure 4b shows a tube section 43 corresponding to an individual sack. The reinforcements 41a, 41b are now located on the inside of the tube section 43.
  • one end of the tube section has been closed by folding and gluing to form a sack 44, which comprises a first rectangular end portion 45 having a first 46a and a second 46b short side and two long sides 47a, 47b.
  • the sack 44 also comprises a tubular wall portion 48.
  • the other end 49 of the sack 44 may be closed before or after filling to form a second rectangular end portion.
  • Figure 4c further shows that the first reinforcement strip 41a covers the first short side 46a of the first rectangular end portion 45 from the inside. It would also cover a first short side of a second rectangular end portion after closing of the other end 49.
  • the second reinforcement strip 41b covers the second short side 46b of the first rectangular end portion 45 and would cover a second short side of the second rectangular end portion.
  • the longitudinal strips 41a, 41b cover only a small part of the tubular wall portion 48.
  • Figure 5a shows the layered material corresponding to three reinforced single-ply sacks according to another embodiment.
  • a first paper ply 50 is provided.
  • Perforations 52 are provided in the ply material.
  • the continuous ply 50 can be torn apart along the perforations 52 to form sections corresponding to individual sacks.
  • a first 51a and a second 51b reinforcement strip extending in the cross direction are arranged on each section.
  • the length of the reinforcement strips 51a, 51b are equal to the width of the ply 50.
  • the reinforcement strips 51a, 51b may also be shorter as long as they cover both short sides of the rectangular end portions(s) of the folded sack 54 (see below).
  • Glue is preferably applied between the paper ply 50 and the reinforcement strips 51a, 51b.
  • Figure 5b shows a tube section 53 corresponding to an individual sack.
  • the reinforcements 51a, 51b are now located on the inside of the tube section 53.
  • one end of the tube section has been closed by folding and gluing to form a sack 54, which comprises a first rectangular end portion 55 having a first 56a and a second 56b short side and two long sides 57a, 57b.
  • the sack 54 also comprises a tubular wall portion 58.
  • the other end 59 of the sack 54 may be closed before or after filling to form a second rectangular end portion.
  • Figure 5c further shows that the first reinforcement strip 51a covers the first 56a and the second 56b short side of the first rectangular end portion 55 from the inside.
  • the second reinforcement strip 51b would cover the short sides of a second rectangular end portion after closing of the other end 59.
  • the cross-directional strips 51a, 51b cover only a small part of the tubular wall portion 58.
  • Figure 6a shows the layered material corresponding to three reinforced single-ply sacks according to yet another embodiment.
  • a first paper ply 60 is provided.
  • Perforations 62 are provided in the ply material.
  • the continuous ply 60 can be torn apart along the perforations 62 to form sections corresponding to individual sacks.
  • a first 61a, a second 61b, a third 61c and a fourth 61d reinforcement patch are arranged on each section.
  • Glue is preferably applied between the paper ply 60 and the reinforcement patches 61a-d.
  • Figure 6b shows a tube section 63 corresponding to an individual sack. The reinforcements 61a-d are now located on the inside of the tube section 63.
  • one end of the tube section has been closed by folding and gluing to form a sack 64, which comprises a first rectangular end portion 65 having a first 66a and a second 66b short side and two long sides 67a, 67b.
  • the sack 64 also comprises a tubular wall portion 68.
  • the other end 69 of the sack 64 may be closed before or after filling to form a second rectangular end portion.
  • the first reinforcement patch 61a is arranged to cover the first short side 66a of the first rectangular end portion 65 from the inside.
  • the second 61a reinforcement patch is arranged to cover the second short side 66b of the first rectangular end portion 65 from the inside.
  • the third 61c and the fourth 61d reinforcement patch would cover the short sides the second rectangular end portion from the inside.
  • the patches 61a-d cover only a small part of the tubular wall portion 68.
  • a benefit of the sack of figure 6 is that it consumes less reinforcement material than the sacks of figures 4 and 5 .
  • the perforations 42, 52, 62 are present already before tubing of the layered material. However, in large scale production of sacks according to the present disclosure, the perforations are preferably made after tubing.
  • Figure 7 illustrates the first stage in a conversion method forming single-ply sacks according to the present disclosure reinforced with longitudinal reinforcement strips 72a, 72b.
  • a paper ply 70 is unwound from a wide paper reel 71 to provide the outer ply of the sacks and glue is applied 74 to the upper side of the ply 70. The upper side corresponds to the inside in the sacks.
  • Paper strips 72a, 72b are unwound from narrow paper reels 73a, 73b and positioned on the glue such that they adhere to the ply 70.
  • the layered material is than formed into a tube 75, in which the paper strips 72a, 72b are opposite to each other.
  • Figure 8 illustrates the first stage in a conversion method forming two-ply sacks according to the present disclosure reinforced with longitudinal reinforcement strips 82a, 82b.
  • a first paper ply 80 is unwound from a first wide paper reel 81 to provide the outer ply of the sacks.
  • Paper strips 82a, 82b are unwound from narrow paper reels 83a, 83b and positioned on the ply 80.
  • a second paper ply 84 is unwound from a second wide paper reel 85 to provide the inner ply of the sacks.
  • the reinforcement strips 82a, 82b will be fixed in position between the plies 80, 84 by the closing (involving folding and gluing) of the ends of the sacks.
  • the layered material is than formed into a tube 86, in which the paper strips 82a, 82b are opposite to each other.
  • drop tests were carried out according to the Constant Drop Height Method ISO 7965/1.
  • the drop was 1.2 m for all sacks, which were filled with cement and closed at both ends.
  • the drop tests were carried out in a controlled atmosphere of 23 °C and a relative humidity of 50 % (according to ISO 6599/1). Each sack was dropped until broken and the number of drops before breakage was counted. Breakage was defined as leakage of cement. 10 sacks of each type were tested and an average number was calculated.
  • the dimensions of the closed sacks were 400x450x100 mm, which corresponds to a volume of 17.4 liters and 25 kg cement.
  • both single- and multiple-ply sacks were tested.
  • the ply material was BillerudKorsnäs' sack paper QuickFill® (white) having a grammage of 120 g/m 2 .
  • the ply material was BillerudKorsnäs' sack paper QuickFill® (white) having a grammage of 80 g/m 2 .
  • the width of each strip was 140 mm and the total area of the reinforcement strips corresponded to 34.1% of a ply.
  • the material of the reinforcement strips was in all cases BillerudKorsnäs' sack paper QuickFill® (brown) having a grammage of 80 g/m 2 .
  • the reinforcement of the single-ply sack resulted in an almost five-fold increase in the number of drops.
  • the reinforced two-ply sack performed slightly better than the three-ply sack.
  • the effect of the reinforcements was better than what the inventors expected.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
EP13188301.9A 2013-10-11 2013-10-11 Verstärkter Sack Withdrawn EP2805896A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13188301.9A EP2805896A1 (de) 2013-10-11 2013-10-11 Verstärkter Sack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13188301.9A EP2805896A1 (de) 2013-10-11 2013-10-11 Verstärkter Sack

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Publication Number Publication Date
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EP13188301.9A Withdrawn EP2805896A1 (de) 2013-10-11 2013-10-11 Verstärkter Sack

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023222814A1 (en) * 2022-05-19 2023-11-23 Gks Packaging B.V. Packaging machine for making reinforced packages
NL2031935B1 (en) * 2022-05-19 2023-11-27 Gks Packaging B V Packaging machine for making reinforced packages

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE512903A (de) *
US2854186A (en) * 1954-03-15 1958-09-30 Bemis Bro Bag Co Bag
US2869772A (en) * 1956-03-26 1959-01-20 Bemis Bro Bag Co Bag

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE512903A (de) *
US2854186A (en) * 1954-03-15 1958-09-30 Bemis Bro Bag Co Bag
US2869772A (en) * 1956-03-26 1959-01-20 Bemis Bro Bag Co Bag

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023222814A1 (en) * 2022-05-19 2023-11-23 Gks Packaging B.V. Packaging machine for making reinforced packages
NL2031935B1 (en) * 2022-05-19 2023-11-27 Gks Packaging B V Packaging machine for making reinforced packages

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