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EP0519896A1 - Easily sealable bag or sack - Google Patents

Easily sealable bag or sack Download PDF

Info

Publication number
EP0519896A1
EP0519896A1 EP92850147A EP92850147A EP0519896A1 EP 0519896 A1 EP0519896 A1 EP 0519896A1 EP 92850147 A EP92850147 A EP 92850147A EP 92850147 A EP92850147 A EP 92850147A EP 0519896 A1 EP0519896 A1 EP 0519896A1
Authority
EP
European Patent Office
Prior art keywords
bag
sack
incisions
sacks
bags
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Withdrawn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
EP92850147A
Other languages
German (de)
English (en)
French (fr)
Inventor
Roland Lundell
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.)
ROSENLEW EMBALLAGE AB
Original Assignee
ROSENLEW EMBALLAGE 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 ROSENLEW EMBALLAGE AB filed Critical ROSENLEW EMBALLAGE AB
Publication of EP0519896A1 publication Critical patent/EP0519896A1/en
Withdrawn legal-status Critical Current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
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/1616—Elements constricting the neck of the bag
    • B65D33/165—Flexible elongated elements integral with or attached to bags or sacks ; Fastening thereof to the bag before closing

Definitions

  • the present invention relates to a package, and more particularly to a bag or a sack which is easily sealable. Especially, the invention relates to such a sack which is made as a waste bag for the handling of refuse.
  • One very large use is as bags for the packaging of food articles and other consumer goods in stores.
  • Another use of increasing importance is as sacks for waste or refuse. Such sacks are finding an increased use in the handling of waste, such as in municipal waste handling.
  • the prior art bags and sacks may have various shapes, depending on the intended use. They are usually manufactured from a tube of sheet material which is closed by a transversal weld at the bottom of the bag or sack. At their open end, bags for consumer use ar most often shaped in such a way that carrying handles are provided, for instance by punching out holes in the wall of the bag. Sacks for the handling of waste are often shaped at their open end such that they can be hung up on a stand of a conventional type. To increase their capacity, bags and sacks are often provided with longitudinal folds in their sides.
  • SE-A-209 307 describes a bag which is manufactured from a tube of plastic foil, which is provided with longitudinal folds or pleats in its sides, and which is sealed at its bottom by a transversal welding seam.
  • a transversal weld is also provided at the upper end of the bag, but here a rectangular piece has been punched out, such that an opening and two carrying handles have been formed.
  • This so-called "brace bag” has found a very wide use, but it has the disadvantage that a considerable amount of material is wasted when the rectangular piece is punched out. If one tries to manufacture a bigger sack with the same shape, the waste will of course be still greater, and, additionally, such a sack is less suitable to be hung up in a stand of a conventional type.
  • a bag or sack of sheet material which by means of a simple arrangement at its open end may be easily sealed even in bigger bags or sacks.
  • the bag or sack of the invention is also simple to manufacture and only requires small modifications of the conventional apparatus for the manufacture.
  • a bag or a sack of sheet material which is characterized in that it near its opening is provided with at least two incisions in the wall of the bag or the sack, said incisions being situated essentially opposite each other and extending essentially at right angles to the longitudinal direction of the bag or the sack, such that at least two lappets are formed for tying the bag or the sack together.
  • the bag or the sack is preferably made from a tube of sheet material, which is sealed by a welding seam at the bottom of the bag or the sack. Furthermore, the bag or the sack is preferably provided with longitudinal folds in its wall, and the incisions are preferably arranged in said folds.
  • the sole figure shows a bag or a sack in accordance with the invention in a flat state, such as it is usually delivered to users.
  • the bag or the sack consists of a tube 1 of a sheet material, preferably plastic foil or film. It is provided with two longitudinal folds 2 and 3, the inward-facing edges of which are shown at 4 and 5. At its bottom, the bag or the sack is sealed by a transversal welding seam 6.
  • incisions or perforations 8 and 9 Near the open end 7 of the bag or the sack are provided incisions or perforations 8 and 9, which preferably penetrate through all the layers of materials in the folds 2 and 3.
  • the incisions 8 and 9 do not extend over the edges 4 and 5 of the inward-facing folds.
  • the incisions 8 and 9 are arranged essentially opposite each other along the circumference of the opened bag or sack, and they extend at essentially right angles to the longitudinal direction of the bag or the sack. However, small deviations in these respects are of no practical importance.
  • lappets 10 and 11 which may be used for sealing the bag or the sack by tying them together.
  • the incisions are therefore suitably made so long that the lappets may be easily tied together. However, they should not be made too long, as this may cause a larger part of the opening of the bag or the sack to be situated outside of part tied together, which will increase the risk of leaks.
  • the incisions should preferably not extend over the edge of the inward-facing fold. When the incisions do not extend over said inward-facing fold, each of the incisions gives two lappets, which may be tied together with the corresponding two lappets at the opposite edge of the bag or the sack. This gives a more secure seal, as four lappets are provided, which may be tied together two and two.
  • the length of the incisions 8 and 9, as well as their distance from the open end 7 of the bag or the sack may easily be determined by a person skilled in the art, taking into account such factors as the size of the bag or the sack and the strength properties of the sheet material.
  • the sheet material for the bag or the sack is primarily used a plastic material which may be worked to a foil or film having suitable properties.
  • Polyolefins have turned out to be especially suitable here, and preferably polyethylene and polypropylene, and copolymers with these.
  • a great number of such polyolefin materials of different qualities are commercially available, and the person skilled in the art can easily select one that corresponds to the requirements set on the bag or the sack.
  • halogen-containing polymer materials should be avoided, as bags and sacks for the handling of waste are usually destructed by burning, whereby harmful halogen compounds may be formed, such as hydrogen halides.
  • the foil material may also contain conventional additives and auxiliary substances, such as pigments, UV protecting agents, tack inhibitors, friction increasing agents and the like, as is well-known to those skilled in the art.
  • Bags and sacks according to the invention may easily be manufactured in conventional apparatus for the manufacture of prior art bags and sacks.
  • a tube of the sheet material is prepared by blow extrusion, and the tube is then provided with folds, cut, welded and punched into a finished bag or sack in a known way.
  • the only addition necessary us a suitably arranged punching device, which punches out the incisions in the sides of the bags at a suitable stage in the manufacturing process.
  • a punching device which punches out the incisions in the sides of the bags at a suitable stage in the manufacturing process.
  • Bags and sacks according to the invention may be manufactured in very different sizes, but the advantages obtained through the invention are most apparent in bigger sacks, such as waste sacks of a standard type, which have a volume of about 150 liters, and which are intended to be hung up in stands of a conventional type.
  • the advantages of the invention are also obtained in bags and sacks of other sizes and types, as long as they are provided with the incisions according to the invention.
  • the border-line between what should be regarded as a "sack” and a "bag” is rather indefinite, and these expressions are not intended to have any limiting meaning.
  • bags and sacks according to the invention have primarily been described with reference to the embodiment shown in the drawing and to the preferred embodiment for use as a sack for the handling of waste.
  • the invention is not limited to these embodiments only, but that many others are possible within the scope of the claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)
EP92850147A 1991-06-20 1992-06-17 Easily sealable bag or sack Withdrawn EP0519896A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9101911A SE9101911L (sv) 1991-06-20 1991-06-20 Laett foerslutningsbar paase eller saeck
SE9101911 1991-06-20

Publications (1)

Publication Number Publication Date
EP0519896A1 true EP0519896A1 (en) 1992-12-23

Family

ID=20383110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92850147A Withdrawn EP0519896A1 (en) 1991-06-20 1992-06-17 Easily sealable bag or sack

Country Status (4)

Country Link
EP (1) EP0519896A1 (sv)
FI (1) FI922855L (sv)
NO (1) NO922423L (sv)
SE (1) SE9101911L (sv)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5480024A (en) * 1993-04-06 1996-01-02 Hertema; Daryl Computer diskette retainer for file folders
US6443617B2 (en) * 2000-01-18 2002-09-03 Windmoeller & Hoelscher Resealable sack or bag
US6918699B2 (en) * 1999-05-10 2005-07-19 Violet Hanson Flat bottom bag with handle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1496589A (fr) * 1965-10-09 1967-09-29 Sac, spécialement sac à porter, en matière plastique, de préférence en polyéthylène
WO1990008071A1 (en) * 1989-01-20 1990-07-26 Sunrock Corporation S.A. A method and a device for manufacturing a bag and a closing ribbon

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1496589A (fr) * 1965-10-09 1967-09-29 Sac, spécialement sac à porter, en matière plastique, de préférence en polyéthylène
WO1990008071A1 (en) * 1989-01-20 1990-07-26 Sunrock Corporation S.A. A method and a device for manufacturing a bag and a closing ribbon

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5480024A (en) * 1993-04-06 1996-01-02 Hertema; Daryl Computer diskette retainer for file folders
US6918699B2 (en) * 1999-05-10 2005-07-19 Violet Hanson Flat bottom bag with handle
US6443617B2 (en) * 2000-01-18 2002-09-03 Windmoeller & Hoelscher Resealable sack or bag

Also Published As

Publication number Publication date
FI922855A0 (fi) 1992-06-18
SE9101911D0 (sv) 1991-06-20
NO922423D0 (no) 1992-06-19
NO922423L (no) 1992-12-21
FI922855L (fi) 1992-12-21
SE9101911L (sv) 1992-12-21

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Designated state(s): AT CH DE DK ES FR GB GR IT LI SE

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Effective date: 19930624