IE69334B1 - A sack and a packaging method for the sack - Google Patents
A sack and a packaging method for the sackInfo
- Publication number
- IE69334B1 IE69334B1 IE344491A IE344491A IE69334B1 IE 69334 B1 IE69334 B1 IE 69334B1 IE 344491 A IE344491 A IE 344491A IE 344491 A IE344491 A IE 344491A IE 69334 B1 IE69334 B1 IE 69334B1
- Authority
- IE
- Ireland
- Prior art keywords
- sack
- covering patch
- duct
- patch
- filling duct
- Prior art date
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
- 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
Abstract
The invention relates to a sack (1) or a similar flexible package and a packing method based on the use of such a sack. The sack (1), which is intended for packing fine-ground material, is provided with a filling duct (3) leading inside the sack and made of flexible material and a bendable covering patch (12) protruding from the sack with the aid of which the end (11) of the filling duct can be closed after the filling of the sack. It is essential to the invention that the filing duct (3) extends at least to the bending line (13) of the covering patch (12) and preferably past it and that the filling duct (3) is, at least at the end thereof, narrower than the covering patch (12). Thus the covering patch (12) can be bent against the surface of the sack and attached thereto in such a way that it forms a uniform closing zone closing the end (11) of the filling duct in a cross-direction and extending to each side thereof.
Description
The object of this invention is a sack or a similar flexible package, intended for packing powdery material, which is provided with a filling duct of flexible material leading inside the sack and with a flexible covering patch protruding from the sack with the aid of which the end of the filling duct can be closed after the filling of the sack (see for example US-A-2 177 922).
In the sack according to the invention, the flexible filling duct acts as a valve which in the filling process lets the material to be packed flow into the sack and flatten out after the filling, in such a way that the path of flow is closed. An advantage of the sack provided with a valve compared to open sacks has been, amongst other things, that it allows for a fast mechanical filling process. When the valve of the sack is self-closing, it does not require other closing procedures. A drawback of a simple valve like this is, however, that some of the packed material tends to leak out of the filled sack through the valve.
When the nature of the material to be packed is such that it is not desirable or permitted to let it come out of the sack in the form of a leak through the valve, a valve such as a so-called pocket valve must be selected enabling absolute tightness. It is only possible to partly mechanize the filling of such a sack and the valve usually must be closed by manually bending it which on the other hand is slow and requires man-power.
It is known in the art that a duct acting as a valve can be closed after the filling of the sack by adhering a covering patch on top of it. It is also known that an extra patch can be attached, in conjunction with the manufacture of the sack, on the upper or lower sides of the valve. The extra patch is folded over the valve and attached by glue after the filling of the sack. It is further known that the inner surface of the valve can be of a material which can be glued or heat-sealed shut after the filling.
All the said, known packages have drawbacks when a tight package is required for a product which is difficult to controlf moves very easily and is very powdery and which, because of its nature, has to be packed on a fully automated packing line and which is not allowed to leak from the package even during very difficult transportation conditions.
The purpose of this invention, is to form a sack or a similar flexible package in which the above problems of known sacks are avoided. This is achieved with the sack as defined in claim 1.
The solution according to the invention prevents leakage Through the fi’inges of the filling duct serving as a valve which is a problem of the known sacks in which the filling duct and the covering patch are of the same width. The invention thus prevents the material possibly remaining in the filling duct from leaking out of the package, as well as leakage through channels caused by the corrugations of the filling duct, which so far have been very common occurences in the case of under-filled sacks. When using the sacks according to the invention, the packing process can be carried out fully-automated without manual procedures.
The sack or a similar flexible package according to the invention is particularly suitable for such fine-ground, powdery products which, because of leakage, would cause contamination of their surroundings or other damage or risks or which themselves would suffer from environmental effects, such as air humidity. As a result of the prevention of the leakage, the advantage is achieved that loss of the product caused by leakage is avoided.
As for the material of the sack according to the invention, different flexible materials are well adapted, such as paper, plastic and textiles or combinations thereof which can be provided in the sack as one or more layers. In addition to sacks, other flexible packages such as bags, can be considered in which the application of a similar filling technique is possible.
According to a preferred embodiment of the invention, the filling duct of the sack extends past the bending line of the covering patch in such a way that while closing the sack, the end of the duct is turned, along with the covering patch, against the surface of the sack. An extremely safe closure is obtained by this solution in which the covering patch engages the surface of the sack on the uniform closing sone, closing the end of the filling duct in a crossdirection and extending axially between the end of the duct and the bending line on each side of the duct.
With respect to the other embodiments of the sack according to the invention, a reference is made to the appended
Claims (10)
1.« A sack (1) or a similar flexible package intended for the packing of fine-ground material and provided with a filling duct (3) leading inside the sack and made of flexible material and a flexible covering patch (12) protruding from the sack with the aid of which the end (11) of the filling duct can be closed after the filling of the sack, the filling duct (3) extending at least to the bending line (13) of the covering patch (12), characterized in that the end (11) of the filling duct is narrower than the covering patch, whereby the covering patch can be bent against the surface of the sack (1) and attached thereto in such a way that it forms a uniform closing zone (16, 18) closing the end of the filling duct in an axial direction and extending to each side thereof.
2. A sack or a similar package according to Claim 1, wherein the filling duct 1 (3) extends past the bending line (13) of the covering patch (12) in such a wav that when closing the sack (1) the end (11) of the duct turns along with the covering patch against the surface of the sack.
3. A sack or a similar package according to Claim 1 or 2, wherein the sack (1) comprises a strip-like part (8) which is attached under the filling duct (3) and extends in the direction of the filling duct as a projection forming the covering patch (12), whereby the sack can be closed by bending the covering patch 180’ along the bending line (13) formed at its base.
4. A sack according to any of the preceding Claims characterized in that the end (11) of the filling duct (3) and the covering patch (12) are situated in the corner (2) of the sack (1) which has a shape of an essentially rectangular prism in such a way that the covering patch can be bent along the corner against the end (4) of the sack and attached thereto.
5. A sack or a similar package according to any of Claims 1 to 3, wherein the end (11) of the filling duct (3) and the covering patch (12) are situated on the side of the essentially flat-shaped sack (1) or a similar package.
6. A Sack or a similar package according to any of the preceding Claims, characteriz e d in that the covering patch (12) and/or the surface of the sack (1) comprises adhesive, whereby the covering patch can be attached to the surface of the sack by heat sealing.
7. A packing method in which fine-ground material is packed into a sack (1) or a similar flexible package through an associated filling duct (3) of flexible material and in which the sack is closed after the filling by the covering patch (12) protruding from the sack which is bent along the end (11) of the filling duct against the surface of the sack and attached thereto, characterized in that the filling duct (3) is extended at least to the bending line (13) of the covering patch (12) and formed, at least at the end (11) thereof, so as to be narrower than the covering patch, whereby when closing the sack (1) with the covering patch, a uniform closing zone (16, 18) is obtained which closes the end of the filling duct in a cross-direction and extends to each side thereof.
8. A method according to Claim 7, characterized in that the filling duct (3) is extended past the bendingline (13) of the covering patch (12), whereby when bending the covering patch, the end (11) of the duct turns along with the patch against the surface of the sack (1) and in th'at the sack is closed by attaching the covering patch on the surface of the sack on a uniform closing zone (16) which closes the end of the filling duct in a cross-direction and r. extends axially between the end or the duct and the bending line to each side of the duct. 9. A method according to Claim 7 or 8, char acterised in that t he attachment of the covering patch (12) to the surface of the sack (1) is effected by gluing. 10. A method according to Claim 7 or 8, characterised in that the covering patch (12) and/or the surface of the sack (1) is provided with adhesive and that the sack is closed by heat sealing the covering patch shut to the surface of the sack.
9. 11. A sack or similar package according to any preceding claim substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
10. 12. A packing method according to any preceding claim substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI904844A FI90520C (en) | 1990-10-01 | 1990-10-01 | The sack and the packaging method using it |
Publications (2)
Publication Number | Publication Date |
---|---|
IE913444A1 IE913444A1 (en) | 1992-04-08 |
IE69334B1 true IE69334B1 (en) | 1996-09-18 |
Family
ID=8531156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IE344491A IE69334B1 (en) | 1990-10-01 | 1991-09-30 | A sack and a packaging method for the sack |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP0550492B1 (en) |
AT (1) | ATE125767T1 (en) |
DE (1) | DE69111819T2 (en) |
DK (1) | DK0550492T3 (en) |
ES (1) | ES2076546T3 (en) |
FI (1) | FI90520C (en) |
GR (1) | GR3017757T3 (en) |
IE (1) | IE69334B1 (en) |
LV (1) | LV10703B (en) |
NO (1) | NO931109L (en) |
PT (1) | PT99136A (en) |
WO (1) | WO1992006014A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5806982A (en) * | 1994-05-10 | 1998-09-15 | Stone Container Corporation | Self-closing sealable valve bag |
FI109290B (en) * | 1997-03-18 | 2002-06-28 | Upm Kymmene Oy | valve Sack |
US6164823A (en) * | 1998-12-07 | 2000-12-26 | Southern Bag Corporation, Ltd. | Valve bag and method for making a valve bag |
GB9914851D0 (en) * | 1999-06-24 | 1999-08-25 | Blue Circle Ind Ltd | Containers for particulate materials |
US6499879B2 (en) | 2001-05-02 | 2002-12-31 | Hood Packaging Corporation | Sealable valve bag and method for making a sealable valve bag |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US429157A (en) * | 1890-06-03 | Anti-friction alloy | ||
DE755207C (en) * | 1934-09-11 | 1953-10-19 | Verpackungsbedarf G M B H | Cross bottom valve bag |
US2177122A (en) * | 1938-03-31 | 1939-10-24 | Arkell & Smiths | Valve bag |
CH285152A (en) * | 1949-06-17 | 1952-08-31 | Jarrier Rene Antoine | Container, in particular paper bag, with filling opening. |
BE496858A (en) * | 1949-07-11 | |||
BE571326A (en) * | 1957-09-24 | 1900-01-01 | ||
FR1246814A (en) * | 1959-10-10 | 1960-11-25 | Papeteries Martin Freres | Improvement in the manufacture of valve bags |
-
1990
- 1990-10-01 FI FI904844A patent/FI90520C/en not_active IP Right Cessation
-
1991
- 1991-09-30 IE IE344491A patent/IE69334B1/en not_active IP Right Cessation
- 1991-10-01 PT PT99136A patent/PT99136A/en not_active Application Discontinuation
- 1991-10-01 AT AT91916178T patent/ATE125767T1/en not_active IP Right Cessation
- 1991-10-01 WO PCT/FI1991/000302 patent/WO1992006014A1/en not_active Application Discontinuation
- 1991-10-01 DK DK91916178.6T patent/DK0550492T3/en active
- 1991-10-01 ES ES91916178T patent/ES2076546T3/en not_active Expired - Lifetime
- 1991-10-01 DE DE69111819T patent/DE69111819T2/en not_active Revoked
- 1991-10-01 EP EP91916178A patent/EP0550492B1/en not_active Revoked
-
1993
- 1993-03-25 NO NO93931109A patent/NO931109L/en unknown
- 1993-04-01 LV LVP-93-218A patent/LV10703B/en unknown
-
1995
- 1995-10-17 GR GR950402857T patent/GR3017757T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
GR3017757T3 (en) | 1996-01-31 |
ES2076546T3 (en) | 1995-11-01 |
FI90520C (en) | 1994-02-25 |
DE69111819T2 (en) | 1996-02-08 |
FI90520B (en) | 1993-11-15 |
FI904844A (en) | 1992-04-02 |
FI904844A0 (en) | 1990-10-01 |
NO931109D0 (en) | 1993-03-25 |
NO931109L (en) | 1993-03-25 |
EP0550492B1 (en) | 1995-08-02 |
DE69111819D1 (en) | 1995-09-07 |
ATE125767T1 (en) | 1995-08-15 |
EP0550492A1 (en) | 1993-07-14 |
LV10703B (en) | 1995-10-20 |
PT99136A (en) | 1993-10-29 |
WO1992006014A1 (en) | 1992-04-16 |
LV10703A (en) | 1995-06-20 |
DK0550492T3 (en) | 1995-12-18 |
IE913444A1 (en) | 1992-04-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Patent lapsed |