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EP0718204A1 - Sack und Verfahren zu dessen Herstellung - Google Patents

Sack und Verfahren zu dessen Herstellung Download PDF

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Publication number
EP0718204A1
EP0718204A1 EP94870202A EP94870202A EP0718204A1 EP 0718204 A1 EP0718204 A1 EP 0718204A1 EP 94870202 A EP94870202 A EP 94870202A EP 94870202 A EP94870202 A EP 94870202A EP 0718204 A1 EP0718204 A1 EP 0718204A1
Authority
EP
European Patent Office
Prior art keywords
bag
slit
bag according
sheet
extremities
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Withdrawn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
EP94870202A
Other languages
English (en)
French (fr)
Inventor
Bernard Cossec, (Nmn)
Jose Angel Ingles Zapater
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.)
ASPLA PLASTICOS ESPANOLES SA
Procter and Gamble Co
Original Assignee
ASPLA PLASTICOS ESPANOLES SA
Procter and Gamble Co
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 ASPLA PLASTICOS ESPANOLES SA, Procter and Gamble Co filed Critical ASPLA PLASTICOS ESPANOLES SA
Priority to EP94870202A priority Critical patent/EP0718204A1/de
Priority to CN 95121453 priority patent/CN1132165A/zh
Publication of EP0718204A1 publication Critical patent/EP0718204A1/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Withdrawn legal-status Critical Current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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/14—Valve bags, i.e. with valves for filling
    • B65D31/147—Valve bags, i.e. with valves for filling the filling port being provided in a side wall
    • 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

Definitions

  • the present invention relates to the field of packaging. More specifically, it relates to containers for the transportation of packaged goods.
  • the present invention proposes a reusable bag for containing a plurality of identical packaged goods.
  • the bag comprises a side wall and two closed ends.
  • the side wall is made of a sheet-like thermoplastic-containing or paper-containing material.
  • the side wall comprises a slit in between overlapping portions of said sheet like material. The slit allows filling and emptying of said bag.
  • the present invention is a transportation container made of a sheet-like flexible material, i.e. a bag.
  • a bag i.e. a bag.
  • the most suitable material used for making the bag of the present invention depends on the use envisioned, i.e. the packaged goods to be transported inside the bag, but generally suitable materials include paper-containing materials, and thermoplastic-containing materials. Paper-containing materials have the advantage that they are more biodegradable and cheaper than plastic, but they are less resistant. Nevertheless, suitable paper materials include simple ply or multyply paper complex made of kraft or recycled paper, resistant laminated paper or paper with reinforcing structure.
  • thermoplastic-containing materials have the advantages, amongst others, that they are resistant, fully flexible, and water-proof, whereby the contained goods are better protected from humidity. There are no restrictions on suitable thermoplastic materials for use herein. Preferred because cheapest are polyethylene or polyproylene based films.
  • the bag (1) comprises at least a side wall (2).
  • the bag may comprise two side walls assembled together (2,2'), or the bag may comprise a single but continuous side wall, as when the bag is manufactured starting from a single sheet which forms a tube.
  • the number of side walls is not an essential feature of the present invention.
  • the bag further comprises at least two closed ends (3,3').
  • the side wall (2) comprises a slit (4) in between overlapping portions (5,5') of said sheet like material. The slit allows the filling and emptying of the bag. Both overlapping portions can belong to the sheet from which the bag is made, as for instance when the bag is made from a single sheet of material in the form of a tube where the ends of the sheet overlap; this method of manufacturing is disclosed hereinafter.
  • a bag according to an invention can be made from a bag initially having a slit but no overlapping portion, i.e. a slit in between to proximal, but not overlapping, edges of sheet material.
  • This arrangement can then be provided with an additional band of material which is fixed onto only one of the proximal edges and which extends over, i.e. which overlaps with, the other proximal edge.
  • the upper overlapping portion i.e. towards the outside of the bag
  • the overlapping portions must be fixed together at least at both of said closed ends of said bag.
  • the upper, overlapping, portion of material (5) is drawn in full line, and the lower, overlapped, portion (5') is drawn in dotted line. It is not essential that the slit corresponds to the whole dimension of the side wall, i.e. from one closed end (3) to the other (3'), but it is essential that the slit be long enough to ensure an easy access to the interior of the bag, for filling it and emptying it.
  • a large overlapping portion favors a tight closure when the bag is filled as indicated hereinafter.
  • the size of the overlapping portion should be at least 1/30, preferably at least 1/15 of the length of the slit.
  • the side wall (2) of the bag is conveniently of a generally square or rectangular shape, and the slit can be arranged lengthwise, i.e. in a direction from one closed end (3) to the other (3'), or widthwise i.e. in a direction perpendicular to a direction from (3) to (3'), or crosswise, i.e. diagonal.
  • the slit is preferably disposed lengthwise, and at equal distance from all corners.
  • the total length of the slit is preferably equal to at least 1/2, preferably 2/3, most preferably 3/4 of the dimension of the side wall in the direction of the slit.
  • the slit (4) may extend to the ends (3,3') of the bag, in which case the overlapping portions (5,5') are fixed together only at the ends of the bag. However, it is preferred that the overlapping portions (5,5') are fixed together in a portion at the distal extremities of said slit, thereby providing reinforced extremities (6,6') for the slit. Such reinforcing extremities are hatched in Figs. 1 and 2. There can be only one reinforced extremity, i.e. extending from one end only, but a preferred embodiment herein comprises two reinforced extremities, one at each end of the slit. The overlapping portions in the reinforced slit extremities can be readily made by sealing or gluing together said overlapping portions.
  • the packaged goods to be contained are introduced through the slit into the bag, and the bag "automatically” closes itself when it is sufficiently filled. Indeed, the packaged goods contained in the bag create a tension inside the flexible bag, and this tension causes the overlapping portions to come together, thereby closing the slit. The bag is not actually closed in the sense that the inside of the bag is still accessible, but the tension and the juxtaposed overlapping portion provide a sufficient closure to prevent the contained goods from escaping from the bag, through the slit.
  • a particular advantage of the present invention is that this arrangement allows for large slits, actually much larger than the goods to be contained. This allows a particularly convenient access to the interior of the bag, for its filling and emptying, without compromising on the security of the closure.
  • the bags herein do not require a separate, possibly complicated, closing operation.
  • the slit remains completely permanently opened.
  • it might be appropriate to close the slit in a simple manner e.g. by means of an adhesive tape or a glue point in the overlapping portions, to prevent theft, in which case the slit may be closed, but in a non-permanent manner.
  • non-permanent it is meant herein a closure which does not require physical destruction of the bag such that its subsequent use as herein described is prevented.
  • a particularly suitable embodiment for a non-permanent closure is a double-faced adhesive tape.
  • such a tape with different faces having different adhesive strength allows an easy opening.
  • a further advantage from having the slit non-permanently closed is that an assembly of stacked bags non permanently closed has been found to be more stable than an assembly of identical bags, but not closed. It is believed that the closure of the bag creates additional rigidity to a stacked assembly of bags.
  • a convenient method for making a bag according to the present invention is to start from a sheet of material.
  • the sheet can then be arranged to form a tube, with the ends of the sheet overlapping each other.
  • the degree of overlapping determines the size of the overlapping portions in the bag eventually manufactured, with the consequences discussed herein above.
  • the tube is then flattened, to form a bag with a continuous side wall and opened ends. At this stage, it is preferred to ensure that the slit is positioned adequately as described before.
  • the two extremities of the tube are then closed, and a bag according to the present invention is obtained.
  • the reinforced slit extremities before closing the ends of the bag.
  • This can be achieved in a number of ways, such as selectively applying glue to the overlapping portions only at the extremities of the slit.
  • Selective welding can be performed either by having welding plates of appropriate size, i.e. corresponding to the size of the overlapping portions.
  • the overlapping portions are welded together so as to close the slit.
  • suitable machines for making bags have welding plates which correspond to the length of the slit.
  • a suitable coating to the end of the sheet which will eventually become the overlapped portion. That coating, for instance, a thermoplastic coating with a printed band will prevent both overlapping portions from being welded together, even if heat is applied, since the printing on the band prevents welding.
  • said ends of said bag can be closed by simply fixing together the side walls, by e.g. gluing or sealing.
  • the heavy duty use foreseen for the bags of the present invention may call for a more robust assembly.
  • a robust end closure can be provided by first folding together the extremities of the side walls, then fixing a separate sheet of material onto said folded arrangement, whereby the folded arrangement is locked. Adhesive tapes can conveniently be used for this purpose. Apart from providing a more robust closing, this arrangement can be used to provide parallelepipedic bags, i.e. bags with a substantially constant thickness.
  • bags according to the present invention are most likely to be stacked when used.
  • a plurality of embossed features i.e. stripes or dots, arranged together in portions (7) on both side walls, which provide some grip between two bags, i.e. prevent them from slipping one on the other.
  • the bags according to the present invention are transportation containers, thus they are useful for containing a plurality of packaged goods.
  • the bags herein particularly useful for containing identical packaged goods, preferably wherein said packaged goods are flexible bags containing a granular or liquid material, or wherein said packages used to package said goods are parallelepipeds.
  • the plurality of packaged goods in the bag of the present invention end up forming a regular shape which provides an optimum tension in the bag, thus an optimum "closing" for the slit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Bag Frames (AREA)
EP94870202A 1994-12-22 1994-12-22 Sack und Verfahren zu dessen Herstellung Withdrawn EP0718204A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP94870202A EP0718204A1 (de) 1994-12-22 1994-12-22 Sack und Verfahren zu dessen Herstellung
CN 95121453 CN1132165A (zh) 1994-12-22 1995-12-21 包囊式容器及其制法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94870202A EP0718204A1 (de) 1994-12-22 1994-12-22 Sack und Verfahren zu dessen Herstellung

Publications (1)

Publication Number Publication Date
EP0718204A1 true EP0718204A1 (de) 1996-06-26

Family

ID=8218688

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94870202A Withdrawn EP0718204A1 (de) 1994-12-22 1994-12-22 Sack und Verfahren zu dessen Herstellung

Country Status (2)

Country Link
EP (1) EP0718204A1 (de)
CN (1) CN1132165A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005027020A1 (de) * 2005-06-08 2006-12-14 Mondi Packaging Ag Schutzverpackung für einen Gegenstand
FR2888220A1 (fr) * 2005-07-11 2007-01-12 Sophie Agnes Christi Tredoulat Sac de conservation a ouverture frontale
PL444697A1 (pl) * 2023-04-28 2024-11-04 Piotr Dziuroń Podkład do transportu płyt wielkogabarytowych

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104590673B (zh) * 2015-02-06 2017-03-15 浙江超伟机械有限公司 一种制作塑料膜侧边阀口袋的制袋机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1073380B (de) * 1960-01-14 Gustav Herzig Fabrik für Friseurbedarf, Schwetzingen (Kr. Mannheim) Flachverpackung aus Kunststoffolie für Haarnetze od dgl
US2929180A (en) * 1958-08-05 1960-03-22 Vizofilm Mfg Corp Method of forming a sales package
FR1327508A (fr) * 1962-06-29 1963-05-17 British Visqueen Ltd Sacs et emballages similaires en matière plastique
DE8621710U1 (de) * 1986-08-13 1986-12-18 M & W Mildenberger u. Willing GmbH & Co KG, 4432 Gronau Aufreißbare Einzelverpackung für einen Hygieneartikel
US5161895A (en) * 1990-09-26 1992-11-10 Myers Marion P Gift sack with drawstring or the like and method for making the same
WO1994018090A1 (en) * 1993-02-05 1994-08-18 Premier Brands U.K. Ltd. Packaging especially for tea bags

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1073380B (de) * 1960-01-14 Gustav Herzig Fabrik für Friseurbedarf, Schwetzingen (Kr. Mannheim) Flachverpackung aus Kunststoffolie für Haarnetze od dgl
US2929180A (en) * 1958-08-05 1960-03-22 Vizofilm Mfg Corp Method of forming a sales package
FR1327508A (fr) * 1962-06-29 1963-05-17 British Visqueen Ltd Sacs et emballages similaires en matière plastique
DE8621710U1 (de) * 1986-08-13 1986-12-18 M & W Mildenberger u. Willing GmbH & Co KG, 4432 Gronau Aufreißbare Einzelverpackung für einen Hygieneartikel
US5161895A (en) * 1990-09-26 1992-11-10 Myers Marion P Gift sack with drawstring or the like and method for making the same
WO1994018090A1 (en) * 1993-02-05 1994-08-18 Premier Brands U.K. Ltd. Packaging especially for tea bags

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005027020A1 (de) * 2005-06-08 2006-12-14 Mondi Packaging Ag Schutzverpackung für einen Gegenstand
DE102005027020B4 (de) * 2005-06-08 2009-06-25 Mondi Ag Schutzverpackung für einen Gegenstand
FR2888220A1 (fr) * 2005-07-11 2007-01-12 Sophie Agnes Christi Tredoulat Sac de conservation a ouverture frontale
PL444697A1 (pl) * 2023-04-28 2024-11-04 Piotr Dziuroń Podkład do transportu płyt wielkogabarytowych

Also Published As

Publication number Publication date
CN1132165A (zh) 1996-10-02

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