EP0550492B1 - A sack and a packaging method for the sack - Google Patents

A sack and a packaging method for the sack Download PDF

Info

Publication number
EP0550492B1
EP0550492B1 EP91916178A EP91916178A EP0550492B1 EP 0550492 B1 EP0550492 B1 EP 0550492B1 EP 91916178 A EP91916178 A EP 91916178A EP 91916178 A EP91916178 A EP 91916178A EP 0550492 B1 EP0550492 B1 EP 0550492B1
Authority
EP
European Patent Office
Prior art keywords
sack
covering patch
duct
filling
filling duct
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.)
Revoked
Application number
EP91916178A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0550492A1 (en
Inventor
Olavi Niskala
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.)
Wisapak Oy AB
Original Assignee
Wisapak Oy 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8531156&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0550492(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Wisapak Oy AB filed Critical Wisapak Oy AB
Publication of EP0550492A1 publication Critical patent/EP0550492A1/en
Application granted granted Critical
Publication of EP0550492B1 publication Critical patent/EP0550492B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Images

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

Definitions

  • 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-2 177 122).
  • 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.
  • a valve such as a so-called pocket valve must be selected enabling absolute tightness. It is only possible to partly mechanise 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.
  • 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.
  • 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 fringes 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.
  • 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.
  • the advantage is achieved that loss of the product caused by leakage is avoided.
  • 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.
  • other flexible packages such as bags, can be considered in which the application of a similar filling technique is possible.
  • 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.
  • the object of the invention is also to provide a packing method in which fine-ground material is packed into the sack or a similar flexible package through an associated filling duct of flexible material and in which the sack is closed, after the filling, with a covering patch protruding from the sack.
  • the covering patch is folded against the surface of the sack against the end of the filling duct and is attached thereto.
  • the method is characterized in that the filling duct is extended at least to the bending line of the covering patch and is formed, at least at the end thereof, to a width smaller than the covering patch, whereby when closing the sack with the covering patch, a uniform closing zone is obtained closing the end of the filling duct in a cross-direction and extending on each side thereof.
  • Fig. 1 shows unfilled, glued sack 1 according to the invention which is suitable for a package of fine-ground materials, such as PVC plastic, diatomaceous earth or food stuffs such as flour.
  • the sack is a flexible package which is closed except for a filler opening in one corner 2 of the sack which has filling duct 3 fitted to serve as a valve.
  • the material of sack 1 can be, for instance, strong paper and filling duct 3 is of flexible material, such as plastic.
  • Ends 4, 5 of sack 1 are formed by bending the ends of a tubular sack blank so as to overlap and by joining them, for instance, by gluing. According to the figure, other end 4 is further provided with end or botton patch 6 glued thereto. (In practice the bottom patches, when used, are usually provided on both ends of the sack.)
  • FIG. 2 and 3 show that said strip 8 extends in the direction of filling duct 3 past end 11 of the duct forming covering patch 12 protruding from the sack with the aid of which the sack can be closed after the filling.
  • Covering patch 12 is thus bent 180° along bending line 13 which is situated at the edge formed by the base of the patch in the corner of the sack.
  • Fig. 7 shows sack 1 according to the invention, in which the filling duct and the covering patch are situated on the side of the sack in a spot indicated by line 17.
  • Filling duct 3 and covering patch 12 are shown in Fig. 8 in which the construction, with respect to the essential parts, corresponds to the one illustrated in Figs. 2 to 6.
  • Filling duct 3 thus extends past bending line 13 of covering patch 12 in such a way that when closing the sack, end 11 of the duct turns along with the covering patch against the side of the sack.
  • the closed sack with closing zones 16 obtained with the aid of glue or adhesive is shown in Fig. 9.
  • Figs. 10 and 11 show an alternative application of the invention corresponding to Figs. 8 and 9 in which end 11 of filling duct 3 is situated on bending line 13 of covering patch 12.
  • the glue or the adhesive forms closing zone 18 covering the major area of the covering patch and extending past end 11 of the filling duct to each side thereof.
  • covering patch 12 and end patch 6 can be preferably, instead of paper, for instance a plastic film or other plastic-coated or laminated material.
  • the attachment of the covering patch to the end patch forming the surface of the sack can be effected by heat sealing.
  • Plastic which is processed to be antistatic can thus preferably be used as the adhesive, whereby the cleaning of the surfaces attached together is easier.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Basic Packing Technique (AREA)
  • Package Closures (AREA)
  • Container Filling Or Packaging Operations (AREA)
EP91916178A 1990-10-01 1991-10-01 A sack and a packaging method for the sack Revoked EP0550492B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI904844A FI90520C (fi) 1990-10-01 1990-10-01 Säkki sekä sitä käyttävä pakkausmenetelmä
FI904844 1990-10-01
PCT/FI1991/000302 WO1992006014A1 (en) 1990-10-01 1991-10-01 A sack and a packaging method for the sack

Publications (2)

Publication Number Publication Date
EP0550492A1 EP0550492A1 (en) 1993-07-14
EP0550492B1 true EP0550492B1 (en) 1995-08-02

Family

ID=8531156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91916178A Revoked EP0550492B1 (en) 1990-10-01 1991-10-01 A sack and a packaging method for the sack

Country Status (12)

Country Link
EP (1) EP0550492B1 (xx)
AT (1) ATE125767T1 (xx)
DE (1) DE69111819T2 (xx)
DK (1) DK0550492T3 (xx)
ES (1) ES2076546T3 (xx)
FI (1) FI90520C (xx)
GR (1) GR3017757T3 (xx)
IE (1) IE69334B1 (xx)
LV (1) LV10703B (xx)
NO (1) NO931109L (xx)
PT (1) PT99136A (xx)
WO (1) WO1992006014A1 (xx)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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 (fi) * 1997-03-18 2002-06-28 Upm Kymmene Oy Venttiilisäkki
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US429157A (en) * 1890-06-03 Anti-friction alloy

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE755207C (de) * 1934-09-11 1953-10-19 Verpackungsbedarf G M B H Kreuzbodenventilsack
US2177122A (en) * 1938-03-31 1939-10-24 Arkell & Smiths Valve bag
CH285152A (fr) * 1949-06-17 1952-08-31 Jarrier Rene Antoine Récipient, notamment sac en papier, à ouverture de remplissage.
BE496858A (xx) * 1949-07-11
BE571326A (xx) * 1957-09-24 1900-01-01
FR1246814A (fr) * 1959-10-10 1960-11-25 Papeteries Martin Freres Perfectionnement à la fabrication des sacs à valve

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US429157A (en) * 1890-06-03 Anti-friction alloy

Also Published As

Publication number Publication date
FI904844A0 (fi) 1990-10-01
DE69111819D1 (de) 1995-09-07
LV10703A (lv) 1995-06-20
IE913444A1 (en) 1992-04-08
PT99136A (pt) 1993-10-29
GR3017757T3 (en) 1996-01-31
WO1992006014A1 (en) 1992-04-16
ATE125767T1 (de) 1995-08-15
IE69334B1 (en) 1996-09-18
LV10703B (en) 1995-10-20
NO931109D0 (no) 1993-03-25
FI90520C (fi) 1994-02-25
FI90520B (fi) 1993-11-15
ES2076546T3 (es) 1995-11-01
FI904844A (fi) 1992-04-02
EP0550492A1 (en) 1993-07-14
DK0550492T3 (da) 1995-12-18
DE69111819T2 (de) 1996-02-08
NO931109L (no) 1993-03-25

Similar Documents

Publication Publication Date Title
JP7213332B2 (ja) 厚紙トレー上にトップシールホイルを配置する方法
US2848151A (en) Sealed container
US2496043A (en) Leakproof package and method of making same
JP2004526639A (ja) 箱体、ならびに箱体を作製するための半加工品、方法および装置
JP2004526639A5 (xx)
US4413464A (en) Process of producing a package or wrapping for storing or shipping material
EP0550492B1 (en) A sack and a packaging method for the sack
US6595688B2 (en) Sealable valve bag and method for making a sealable valve bag
US4566131A (en) Valved bag
JP3182692B2 (ja) 自動閉鎖式のシール可能なバルブ付きバッグ
US20060035777A1 (en) Self-closing sealable valve bag
EP0108537A1 (en) Packaging elements
US2170364A (en) Packaging structure
US6164823A (en) Valve bag and method for making a valve bag
US4184627A (en) Sack of plastics material with internal fastener and base covering sheet and method of making same
US4406646A (en) Method of producing self-supporting plastic bag
US3443354A (en) Method of sealing cartons
US2359190A (en) Bag
US3035750A (en) Closed-end containers
US4412645A (en) Self-sealing bag sleeve
US3203623A (en) Bags
US2737335A (en) Unitary impervious container
US4976674A (en) Bag and method of making the same
US2527692A (en) Package construction
US3285499A (en) Bag closure device

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19930323

AK Designated contracting states

Kind code of ref document: A1

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

17Q First examination report despatched

Effective date: 19941012

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: WISAPAK OY AB

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

REF Corresponds to:

Ref document number: 125767

Country of ref document: AT

Date of ref document: 19950815

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69111819

Country of ref document: DE

Date of ref document: 19950907

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 19950929

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19951013

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19951017

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19951018

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19951024

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19951030

Year of fee payment: 5

ITF It: translation for a ep patent filed

Owner name: NOTARBARTOLO & GERVASI S.R.L.

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2076546

Country of ref document: ES

Kind code of ref document: T3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19951116

Year of fee payment: 5

ET Fr: translation filed
REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3017757

PLAV Examination of admissibility of opposition

Free format text: ORIGINAL CODE: EPIDOS OPEX

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLAV Examination of admissibility of opposition

Free format text: ORIGINAL CODE: EPIDOS OPEX

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: WALTER DUERBECK PAPIERSACKFABRIKEN GMBH & CO. KG

Effective date: 19960502

NLR1 Nl: opposition has been filed with the epo

Opponent name: WALTER DUERBECK PAPIERSACKFABRIKEN GMBH & CO. KG

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 19960920

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960924

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19960926

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19961002

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19961002

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19961031

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

RDAH Patent revoked

Free format text: ORIGINAL CODE: EPIDOS REVO

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

BERE Be: lapsed

Owner name: WISAPAK OY A.B.

Effective date: 19961031

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19970501

EUG Se: european patent has lapsed

Ref document number: 91916178.6

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

27W Patent revoked

Effective date: 19970414

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state

Free format text: 970414

REG Reference to a national code

Ref country code: CH

Ref legal event code: PK

Free format text: WIDERRUF EPA NACH ERLOESCHEN WEGEN NICHTBEZAHLUNG EINER JAHRESGEBUEHR WURDE IRRTUEMLICH EINGETRAGEN.