CA1236783A - Opening arrangement for packing containers - Google Patents

Opening arrangement for packing containers

Info

Publication number
CA1236783A
CA1236783A CA000440009A CA440009A CA1236783A CA 1236783 A CA1236783 A CA 1236783A CA 000440009 A CA000440009 A CA 000440009A CA 440009 A CA440009 A CA 440009A CA 1236783 A CA1236783 A CA 1236783A
Authority
CA
Canada
Prior art keywords
cover strip
grip
opening
lug
moulded
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.)
Expired
Application number
CA000440009A
Other languages
French (fr)
Inventor
Rolf Viberg
Jan-Erik Olsen
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.)
Tetra Pak AB
Original Assignee
Tetra Pak 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 Tetra Pak AB filed Critical Tetra Pak AB
Application granted granted Critical
Publication of CA1236783A publication Critical patent/CA1236783A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D5/00Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/32Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper having bodies formed by folding and interconnecting two or more blanks each blank forming a body part, whereby each body part comprises at least one outside face of the box, carton or tray
    • B65D5/322Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper having bodies formed by folding and interconnecting two or more blanks each blank forming a body part, whereby each body part comprises at least one outside face of the box, carton or tray at least one container body part formed by folding a single blank to essentially U-shape with or without extensions which form openable lid elements
    • B65D5/324Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper having bodies formed by folding and interconnecting two or more blanks each blank forming a body part, whereby each body part comprises at least one outside face of the box, carton or tray at least one container body part formed by folding a single blank to essentially U-shape with or without extensions which form openable lid elements at least two container body parts, each formed by folding a single blank to essentially U-shape
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D5/00Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42Details of containers or of foldable or erectable container blanks
    • B65D5/70Break-in flaps, or members adapted to be torn-off, to provide pouring openings
    • B65D5/708Separate tearable flexible elements covering a discharge opening of a container, e.g. adhesive tape

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Closures For Containers (AREA)
  • Packages (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Bag Frames (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)

Abstract

ABSTRACT

Opening arrangements for packing containers often consist of a pouring opening formed in the packing container wall which is covered by a tear-off cover strip. To faciliate the removal of the cover strip, the same is placed so that it projects with one end portion outside the edge line of the container wall. However, this also increases the risk of unintentional opening. To reduce this risk the projecting end part of the cover strip may be folded about 180° to lie against the main part of the cover strip, at the same time as the cover strip is provided with one or more moulded portions which make it possible to insert a finger underneath the grip lug and lift the same when the cover strip is to be removed.

Description

s~

--A~ tHri-ARR~*~M~T-FOR PA6~6,6~T ~E~S---The present invention relates to an opening arrangement for packing containers comprising a wall with a pouring opening and 5 a tear-off cover strip applied over the same in a sealing manner.
Packing containers of the non-returnable type are used for the packaging of various contents such as milk, juice and the like. The packing containers are usually manufactured by folding and sealing of laminated material in the form of sheets or a web 10 which comprise at least on the outside a layer of thermoplastic material serving on the one hand as a liquid-tight layer, on the other hand makes possible the sealing together of the packing con-tainer. The packing container is usually provided with some form of opening arrangement, e.g. in the form of a cover strip which 15 covers a pre-punched pouring opening in the wall of the packing container and can simply be torn off when the packing container is to be opened and the contents are to be emptied out through the pouring opening.
In packing containers with opening arrangements which comprise 20 a pre-manufactured pouring opening and a cover strip sealing the same, the pouring opening is customarily placed near the edge of one wall of the packing container, in particular a plane top wall.
The cover strip is applied over the pouring opening and is sealed to the wall material around the pouring opening so that a corn-25 pletely liquid-tight seal is achieved. In order to facilitate the removal of the cover strip when the packing con-tainer is to be opened, it is possible to provide the cover strip with a projecting grip-lug which extends outside the actual edge of the container wall, and in this manner makes it possible simply to grip the s-trip 30 between thumb and forefinger and pull it o-ff in connection with the opening of the packing container.
The abovementioned type of cover strip has been found to have a disadvan-tage in that this projecting grip-lug is easily deformable and gets caught on the adjacent packing con-tainer during the hand-35 ling of the packing containers in collective packages of the carriertype. This means among other things an increased risk of leakages.

' '17''' ~36~

The presen-t inven-tion provides an opening arrall(Jement for packing con-tainers, this opening arrange-ent being of -the -type which comprises a pouring opening ancl a cover strip sealing the same, bu-t which is not sub-ject to -the disadvan-tages of -the opening arrangements cle.scribed above.

r~'he presen-t inven-tion also provides an opening arrallgemen-t of the type descrlbed in the introduction in which the grip-lug oE the cover strip does no-t extend out-s:ide -the contour of -the container wall but is nevertheless simple to grip and u-tilize when the packing container is to be opened.

Finally the present invention provides a cover strip where-in the risk of unintentional opening is minimized.

In accordance with the invention in that an open-iny arrangement for packing containers comprising a wall with a pouring opening and tear-off cover strip applied over the same in a sealing manner, one end of the cover strip is cloublecl and given the form of a grip-lug, the cover s-trip havincJ a moulded part which provides a gap be-tween the free encl of the grip-lug and the main part oE the underlying Illain par-t of the cover strip.

Suitably -the moulded part is si-tuated with a lim-ite(l rcgion of the main part of the cover strip and has a s:ize and shape which substantially correspond to -the uncler-Lyill~J pouring opening. Preferably the grip-lug is folded over about 190 in relation to the main part of the cover str:ip and is si-tuated with its free edge on a level with Lhe ullderly:ing pouring opening. ~esirably the moulded part ol the cover strip extencls clown in-to the pouring opening ~:lncl serves as a reclosing element. Suitably the moulded part is situated in the free edge region of the grip-lug.

~3~ 3 Desirably -the doubled grip-lug is detachably joined along its edges -to the main part of the underlying cover strip.
P~eferably a folding line between the main part of the covcr strip and the grip-lug ex-tends substan-tially along the container wall.

~ rhrough -the design of the opening arrangement in accor(.lclnce with the invention a readily openable cover s~rip is provided wherein -the risk of unin-tentional opening L0 hcls been wholly eliminated whilst ma-terial consump-tion and costs have no-t been raised by comparison with known cover strips.

A preferred embodimen-t of the opening arranyement in accordance with the invention will now be described in more de-tail with special reference to the accompanyiny schematic drawings which only show the details required for the understanding of -the invention.

Fig. 1 shows in perspective a packing con-tainer with an opening arrangement according to -the invention.

Fig. 2 shows on a larger scale a part of the top container wall - 2a ~3~

with an opening arrangement according to fig.l.
The packing container shown in fig.l is of a known type and is made from two laminated sheets oF packing material which on the ou-tside have layers of thermoplastic, that is to say heat-sealable, 5 material. One sheet is bent into U-shape and forms a back wall 1, a bo-ttom wall 2 and a top wall 3 of the packing container. The other sheet too is bent substantially into a U-shape and sealed to the first sheet so that it forms a curved casiny wall 4 for the packing con-tainer. The two sheets are heat-sealed to one 10 another at their contact surfaces. This known package type is chosen only as an example of a suitable packing container on which the opening arrangement in accordance with the invention can be used, but it is understood that any known or new type of packing container whatever which has a substantially plane container wall 15 can be provided with an opening arrangement in accordance with the invention.
As is also evident from fig.l, the one container wall of the packing container shown, more particularly the top wall 3, is provided with a cover strip 5 which is applied over a non-visible 20 pouring opening in the -top wall 3. The cover strip 5, which is shown more clearly in fig.2, has a doubled front end which serves as a grip lug 6. The grip-lug 6 is separated from the main portion of the cover strip sealing the pouring opening by a folding line 7 which extends substantially along -the edge line of the container 25 wall 3. The grip lug 6 is folded over about 180 in relation to the main part of the cover strip and situa-ted with its free edge 8 on a level wi-th the underlying powring opening which is not visible in fig.2 but whose contour is indicated by a moulded, recessed part 9 of the main part of the cover strip, -this part 30 having a si~e and shape which substantially correspond to the unclerlying pouring opening. The moulded part 9 extends so far down into the pouring opening that it can serve as a reclosing element, since the contact between the edges of the moulded part 9 and the edges of the pouring opening provides a friction grip 35 which retains the cover strip relatively securely over the pouring opening when the cover strip is applied again in its original '7 ~3 position after the opening of the packing container.
Since the free edge 8 of the grip lug 6 is on a level with the underlying pouring opening 9, a gap will be produced between the doubled grip-lug 6 and the main part of the cover strip 5 in 5 spite of -the doubling over 180 of the cover strip (the grip lug 6 is shown in fig,2 for the sake of clarity not fully in contact with the main part of the cover strip), which makes it possible -to introduce a finger underneath the free edge 8 of the grip lug 6 and lift up the grip lug 6 as a preparation for the tearing off 10 of the main part of the cover strip 5. Through the doubling of the grip tug 6 of the cover strip no part of the cover strip will project outside the edge line of the packing container thus eliminating the risk of unintentional opening. Since the doubled grip lug 6 is folded over about 180 and thus lies flat against 15 the top portion of the packing container, no part of the grip lug will project from the top wal1 3 either, which also contributes to the prevention of any unintentional opening. To prevent the grip lug from "raising itself" and Drojecting from the surface of the top wall 3, it may be suitable in certain cases, P.g. when 20 a material is used for the manufacture of the cover strip 5 which is hard to fold, to seal the grip lug 6 to the cover strip 5. This is accomplished by a de-tachable seal along the edges of the grip lug 6 and in particular by elongated sealing zones along the longi-tudinal edges of the cover strip 5 on both sides of the moulded 25 part 9.
As mentioned earlier, the moulded part 9 may be utilized -for the reclosing o-f the packing container by vir-tue of its friction contact wi-th the edges of the pouring opening. However, it is not always desirable to provide the cover strip 5 with some recessed, 30 moulded part. If this is the case the moulding which is required for facilitating the introduction of a finger underneath the grip lug 6 may be provided in the grip lug itself where a moulded part can be formed in -the vicinity of the Free edge region (not shown in the figures) of the grip lug 6. This moulded part may be in 35 the form of a semicircular raised part or be const-ituted of two parallel projecting zones which prevent the centre portion of the free edge 8 of the grip lug from resting fully against the under-lying main part of the cover strip 5 when the grip lug 6 is folded over about 180. With this design of the cover strip in accordance with the invention it is likewise possible to prevent unintentional unfolding of the grip lug 6 by providing seals of appropriate strength at the free corner or parallel edges of the grip lug.

Claims (6)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An opening arrangement for packing containers comprising a wall with a pouring opening and tear-off cover strip applied over the same in a sealing manner, one end of the cover strip being folded over about 180° to form a grip-lug, the cover strip having a moulded, recessed part which provides a gap between the free end of the grip-lug and the underlying main part of the cover strip wider than the moulded, recessed part and being detachably joined along its edges to the flange portions of the main part of the underlying cover strip.
2. An opening arrangement in accordance with claim 1, in which the moulded, recessed part is situated with a limited region of the main part of the cover strip and has a size and shape which substantially correspond to the under-lying pouring opening.
3. An opening arrangement in accordance with claim 2 in which the grip-lug is folded over about 180° in relation to the main part of the cover s-trip and is situated with its free edge on a level with -the underlying pouring opening.
4. An opening arrangement in accordance with claim 2, in which the moulded part of the cover strip extends down into the pouring opening and serves as a reclosing element.
5. An opening arrangement in accordance with claim 1, in which the moulded part is situated in the free edge region of the grip-lug.
6. An opening arrangement in accordance with claim 1, 4 or 5 in which a folding line between the main part of the cover strip and the grip-lug extends substantially along the edge of the container wall.
CA000440009A 1982-11-08 1983-10-28 Opening arrangement for packing containers Expired CA1236783A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8206311-6 1982-11-08
SE8206311A SE434250B (en) 1982-11-08 1982-11-08 PACKAGING CONTAINER OPENING DEVICE

Publications (1)

Publication Number Publication Date
CA1236783A true CA1236783A (en) 1988-05-17

Family

ID=20348486

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000440009A Expired CA1236783A (en) 1982-11-08 1983-10-28 Opening arrangement for packing containers

Country Status (13)

Country Link
EP (1) EP0108444B1 (en)
JP (1) JPS59103865A (en)
AT (1) ATE35245T1 (en)
AU (1) AU562111B2 (en)
CA (1) CA1236783A (en)
DE (1) DE3377121D1 (en)
DK (1) DK157799C (en)
ES (1) ES285006Y (en)
FI (1) FI70187C (en)
NO (1) NO164589C (en)
PT (1) PT77594B (en)
SE (1) SE434250B (en)
SU (1) SU1364233A3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168312B (en) * 1984-12-13 1989-05-17 Metal Box Plc Containers
US4679693A (en) * 1986-05-14 1987-07-14 Harold Forman Label resealing container
EP0947433A1 (en) 1998-04-03 1999-10-06 Tetra Laval Holdings & Finance SA Device for opening packages of pourable food products

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977591A (en) * 1974-06-28 1976-08-31 Ab Ziristor Cover strip for the pouring opening in a packing container
US3990603A (en) * 1975-12-09 1976-11-09 Minnesota Mining And Manufacturing Company Easy open closure system
US4116359A (en) * 1977-10-21 1978-09-26 The Continental Group, Inc. Through hole deformation and inside sealing tear strip
US4176760A (en) * 1978-12-08 1979-12-04 The Continental Group, Inc. Easy opening container unit having a domed end panel
US4244488A (en) * 1979-09-28 1981-01-13 The Continental Group, Inc. Plastic pull tab with memory

Also Published As

Publication number Publication date
DK157799B (en) 1990-02-19
FI70187B (en) 1986-02-28
NO164589B (en) 1990-07-16
JPS59103865A (en) 1984-06-15
EP0108444A2 (en) 1984-05-16
ES285006U (en) 1985-06-16
SE8206311L (en) 1984-05-09
DK157799C (en) 1990-09-24
DK509983D0 (en) 1983-11-07
NO164589C (en) 1990-10-24
SU1364233A3 (en) 1987-12-30
FI834047A0 (en) 1983-11-03
AU2104783A (en) 1984-05-17
DE3377121D1 (en) 1988-07-28
FI70187C (en) 1986-09-15
DK509983A (en) 1984-05-09
SE8206311D0 (en) 1982-11-08
AU562111B2 (en) 1987-05-28
ATE35245T1 (en) 1988-07-15
SE434250B (en) 1984-07-16
PT77594A (en) 1983-12-01
ES285006Y (en) 1986-04-01
PT77594B (en) 1986-03-12
EP0108444B1 (en) 1988-06-22
FI834047A (en) 1984-05-09
JPH0571469B2 (en) 1993-10-07
EP0108444A3 (en) 1985-08-14
NO834051L (en) 1984-05-09

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Legal Events

Date Code Title Description
MKEX Expiry