GB2499009A - Tear opening means for a paperboard container - Google Patents

Tear opening means for a paperboard container Download PDF

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Publication number
GB2499009A
GB2499009A GB201201874A GB201201874A GB2499009A GB 2499009 A GB2499009 A GB 2499009A GB 201201874 A GB201201874 A GB 201201874A GB 201201874 A GB201201874 A GB 201201874A GB 2499009 A GB2499009 A GB 2499009A
Authority
GB
United Kingdom
Prior art keywords
container
line
tab
weakness
flange
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Withdrawn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
GB201201874A
Other versions
GB201201874D0 (en
Inventor
Samantha Moore
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.)
COLPAC Ltd
Original Assignee
COLPAC Ltd
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 COLPAC Ltd filed Critical COLPAC Ltd
Priority to GB201201874A priority Critical patent/GB2499009A/en
Publication of GB201201874D0 publication Critical patent/GB201201874D0/en
Publication of GB2499009A publication Critical patent/GB2499009A/en
Application status is Withdrawn legal-status Critical

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
    • B65D5/02Rigid 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 by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
    • B65D5/029Rigid 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 by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body the tubular body presenting a special 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
    • B65D5/02Rigid 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 by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
    • B65D5/06Rigid 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 by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end-closing or contents-supporting elements formed by folding inwardly a wall extending from, and continuously around, an end of the tubular body
    • B65D5/064Rectangular containers having a body with gusset-flaps folded outwardly or adhered to the side or the top of the container
    • B65D5/065Rectangular containers having a body with gusset-flaps folded outwardly or adhered to the side or the top of the container with supplemental means facilitating the opening, e.g. tear lines, tear tabs
    • 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
    • B65D5/20Rigid 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 by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
    • B65D5/2014Rigid 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 by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form the central panel having a non rectangular shape
    • B65D5/2028Rigid 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 by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form the central panel having a non rectangular shape triangular
    • 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
    • B65D5/4204Inspection openings or windows
    • 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
    • B65D5/54Lines of weakness to facilitate opening of container or dividing it into separate parts by cutting or tearing
    • B65D5/5405Lines of weakness to facilitate opening of container or dividing it into separate parts by cutting or tearing for opening containers formed by erecting a blank in tubular form
    • B65D5/542Lines of weakness to facilitate opening of container or dividing it into separate parts by cutting or tearing for opening containers formed by erecting a blank in tubular form the lines of weakness being provided in the container body
    • 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
    • B65D5/54Lines of weakness to facilitate opening of container or dividing it into separate parts by cutting or tearing
    • B65D5/545Lines of weakness to facilitate opening of container or dividing it into separate parts by cutting or tearing for opening containers formed by erecting a "cross-like" blank
    • B65D5/546Lines of weakness to facilitate opening of container or dividing it into separate parts by cutting or tearing for opening containers formed by erecting a "cross-like" blank the lines of weakness being provided in an extension panel or tab of a hinged closure
    • 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
    • B65D85/00Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/30Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
    • B65D85/36Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for bakery products, e.g. biscuits

Abstract

The invention relates to a means for opening a container, said container being particularly, but not exclusively, for receiving a food product. The container includes opening means 11, said opening means 11 comprising a tab 12, and said tab 12 is bonded to a first flange 8 of said container. The tab 12 of the opening means 11 includes a line of weakness 13 which abuts an edge on said first container flange 8 such that, in use, opening of said container is achieved by initiating a tear in the tab 12 of the opening means 11 along the line of weakness.

Description

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TEAR OPENING MEANS FOR A PAPERBOARD CONTAINER

The invention relates to a means for opening a container, wherein said container is particularly, but not exclusively for receiving a food product. The invention also relates to a blank for 5 forming a container with said opening means and a method of forming said container from said blank.

It is known to package some food products, such as sandwiches, in hermetically sealed containers which are formed from a folded blank of material, such as paperboard: For the 10 purpose of this specification 'paperboard' is considered to encompass paper, cardboard and similar materials.

In order to extend the shelf life of these packaged food products, it is desirable to reduce, preferably to zero, the amount of oxygen remaining in said sealed container. This can be 15 achieved by vacuum packaging, where the air within the packaging is simply removed, or gas flushing, where the atmosphere within the packaging is flushed out by the addition of one or more gases such as nitrogen, argon or carbon dioxide. Most preferably, a technique known as 'modified atmosphere packaging' can be employed, whereby the air in the container is first removed and subsequently replaced by one or more gases as described above. The initial step 20 of sucking out the air prevents residual oxygen being left in the container, which is one typical problem associated with gas flushing.

The success of modified atmosphere packaging is dependent on the quality of the hermetic seal provided on the container. Numerous attempts have been made to modify tthe design of 25 packaging in such a way that a suitable seal can be formed, and numerous patent applications have been filed directed to these developments. One key advance has been the use of plastics films to provide an impermeable layer across the entirety of the interior surface of a paperboard container/blank. However, improving the quality of the hermetic seal leads to packaging that can be difficult to tear open.

30

It is an object of the present invention to provide a hermetically sealable paperboard container formed from a blank wherein, in use, a tear can easily be initiated in said container by a user in order to access the container contents but wherein the integrity of the hermetically sealed container is not compromised in order that said tear can be easily made. It is a further object of 5 the invention that formation of the container should be straightforward.

According to the present invention there is provided a container according to the appended claim 1.

10 The container according to the present invention retains its integrity at the points where one portion of laminated paperboard is sealed to another to create a double layer of paperboard, but also comprises a line of weakness in said paperboard at a point where a single layer of paperboard extends from said double paperboard layer. This enables easy tear opening of said sealed container in conjunction without compromising the quality of hermetic sealing of said 15 container.

Further advantageous features of the invention are recited in the dependent claims 2 to 15.

The container is preferably a food product container, in particular a sandwich pack. The 20 container may be formed from paperboard, in particular from a paperboard blank, in which case a liquid impermeable coating is preferably provided on at least the interior surface of said blank to prevent ingress of liquids into the paperboard.

The line of weakness may be a score line, such as a partial depth cut line or line of compressed 25 paperboard, or a cutout portion of the paperboard, or, preferably a cut through said paperboard and/or laminate. This region of weakness in the paperboard and or laminate allows a user to initiate a tear in said paperboard more easily than compared to paperboard that does not include said feature.

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The closure flap opening means may, advantageously, be bonded to a second flange of said container to improve the integrity of the seal at the opening means. The more easily tearable opening means allows for bonding of said second flange without making tearing open of the opening means overly difficult.

5

Preferably a layer of heat sealable film is provided between the first and second container flanges and bonded to the opening means. The line of weakness may extend through both the the layer of heat sealable film and the paperboard, or alternatively, the line of weakness may abut the edge of the layer of heat sealable film and, further preferably, the line of weakness may 10 not overlap the layer of heat sealable film. A non-overlapping arrangement enables a tear to be initiated in just the paperboard opening means and does not require simultaneous initiation of a tear in the paperboard and heat sealable film.

The container is preferably formed from a folded blank and, advantageously, the bonding is 15 such that the container is hermetically sealed. Advantageously, the blank is formed by bonding the tab of the opening means to the first flange of the container and by forming a line of weakness in said tab which abuts an edge on said first container flange. Preferably, the line of weakness is formed in the blank at approximately the same time in the manufacturing procedure that said blank is cut, i.e. when the blank is cut from a single piece of paperboard using a 20 conventional technique such as die-cutting. Alternatively, the step of bonding the tab to the flange is performed before or substantially simultaneously with the step of forming a line of weakness in said tab which abuts an edge on said first container flange such that said line of weakness formed in the tab of the opening means is aligned with the edge of the flange bonded to the first flange of the container. Performing the steps in #this order enables quick and simple 25 assembly of the container from the blank because it removes the need to accurately align the tab and flange when bonding said features together.

30

A better understanding of the present invention will be obtained from the following detailed description. The description is given by way of example only and makes reference to the accompanying drawings in which:

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Figure 1 is a plan view of a blank suitable for forming a container according to the present invention;

Figure 2 is a perspective view showing a partially folded blank according to the present 5 invention;

Figure 3 is an end view of a partially folded blank according to the present invention;

Figure 4 is a side view of a blank according to the present invention folded to form a sealed container according to the present invention;

Figure 5 is a plan view of the folded blank of Figure 4;

10 Figure 6 is an underside view of the folded blank of Figures 4 and 5;

Figure 7 is a partial view of the underside of the folded blank of Figures 4 to 6, showing initiation of a tear;

Figure 8 is a partial view showing propagation of the tear of Figure 7; and

Figure 9 is partial perspective view of an alternative blank according to the present 15 invention.

Figure 1 shows a plan view of a blank 1 suitable for forming a container according to the present invention. The blank 1 has a paperboard substrate which is cut from a single piece of paperboard using a conventional technique such as die-cutting.

20

The blank 1 shown in Figure 1 is for a sandwich container and, once folded, provides a container with a generally triangular profile for receiving diagonally cut'sandwiches. The surface of the blank 1 shown in Figure 1 (the first surface) will form the inside of the finished container and comprises a layer of laminated plastics film. The second surface of the blank 1, 25 opposite to the first surface, will form the outside of the finished container. The film layer is applied over the entire first surface of the paperboard and serves as both a moisture

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impermeable barrier and as a heat sealable medium for sealing the finished container and, in some cases, also for bonding the container walls together.

The blank 1 comprises first and second generally rectangular end walls 2, 3 which are 5 connected to each other along their common short edge by a fold line to form the apex of the folded container. A pair of generally triangular side walls 4, 5 is connected by further fold lines to the long edges of each of the end walls 2, 3, specifically the pair of generally triangular side walls 4 is connected to the first end wall 2 and the pair of generally triangular side walls 5 is connected to second end wall 3. In the particular embodiment shown, the sides of the first and 10 second generally rectangular end walls 2, 3 taper away from their common fold line such that the finished container has an opening that is wider than the apex of the container to aid insertion of the cut sandwiches. This is not, however, essential.

The blank 1 also comprises a generally rectangular closure flap 6 joined by a fold line along one 15 of its short edges to the short outside edge of the first generally rectangular end wall 2. A window 7 is provided in the closure flap 6 to allow a user to view the contents of the container once it is sealed. In the illustrated embodiment the window 7 is provided as an aperture in the paperboard substrate which is covered by the continuous laminated film layer. This helps to maintain an optimum seal by avoiding discontinuities in the closure flap 6. However, it is also 20 possible for the window 7 to be covered by a separate piece of film if the coating of the paperboard is achieved by alternative means, such as by spraying.

The two outside edges of each of the generally triangular side walls 4, 5 are joined by a fold line to generally rectangular flanges (8. The film layer extends beyond the edges of the 25 paperboard to bridge the gap between the flanges provided on each generally triangular side wall 4, 5, such that substantially triangular areas 9a, 9b, and optionally 9c, 9d, of unsupported film are provided. Similarly, a generally rectangular flange is joined by a fold line to the short outside edge of the second generally rectangular end wall 3 and the film layer extends beyond the edges of the paperboard to bridge the gap between said flange and adjacent flanges provided 30 on the adjacent triangular side walls 5 such that substantially triangular areas 9e, 9f of

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unsupported film are provided. The film areas provide a continuous flange around the side walls 4, 5 of the blank 1 such that the blank 1 can be hermetically sealed when folded into a container.

5 The flange 8 joined by a fold line to the short outside edge of the second generally rectangular end wall 3 forms part of an opening means 11, in conjunction with an adjacent flange 8 on the adjacent triangular side wall 5 and the triangular area 9f positioned between said adjacent flanges 8. The opening means 11 will be described in more detail hereafter.

10 The opening means 11 comprises a tab 12 provided proximate one of the corners of the short outside edge of the generally rectangular closure flap 6. The tab 12 extends outwards from both a long outer edge and the short outer edge of the closure flap 6 at an angle of approximately 45 degrees. The tab 12 is generally rectangular with two outermost corners removed.

15 Extending at an angle of approximately 45 degrees to the closure flap 6 outer edge, substantially parallel to opposing edges of the tab 12 and substantially perpendicular to the long outside edge of the tab 12 is a line of weakness 13 formed in the paperboard of the blank 1. The line of weakness 13 is a line in the paperboard of the blank 1 that is of reduced strength, and so more easily tearable, than compared to the majority of said paperboard. The line of 20 weakness 13 is of the form of a full or partial depth cut line such as a groove or score line. Alternatively, the line of weakness 13 may be provided by removal of a channel of paperboard in the tab 12 or other suitable means.

As mentioned above, when the blank 1 is folded to form a container the adjacent flanges 8 on 25 the generally triangular side walls 4, 5 are bonded together and the remaining flanges 8 are bonded to the closure flap 6. This is shown progressively in Figures 2 to 6. At the corner of the container where the tab 12 of the opening means 11 is provided on the closure flap 6, ends 14 of the two flanges 8 that are coincident with said corner are shaped so as to, in combination with triangular film area 9f, substantially cover the first surface, i.e. the laminated surface, of said tab 30 12.

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The exception to this is that a substantially rectangular portion of the inside, laminated face of the blank 1, is not connected to the flanges 8. Accordingly, and as shown most clearly in Figure 6, when the blank 1 is folded into a container the line of weakness 13 is positioned on the tab 12 5 such that it is aligned with, i.e. abuts, an edge on a flange 8. The position of the line of weakness 13 enables a user to initiate a tear in the tab 12 of the opening means 11 without, at the same time, having to initiate a tear in the flange 8 or film area 9f bonded to said tab 12. In other words, a user is only required to initiate a tear in a single sheet, or thickness, of paperboard rather than through a double thickness of paperboard which is present along the 10 edges of the closure flap 6 where said flap 6 is bonded to the flanges 8 of the folded container.

This design of the opening means 11 greatly improves the ease of which a hermetically sealed container can be opened without compromising the extent, and thus integrity, of hermetically bonded laminate provided between the closure flap 6 and the flanges 8 of the folded container. 15 In addition, the tab 12 of the opening means 11 can be smaller than is typically present on opening means of hermetically sealed paperboard containers because less force is required to initiate a tear in, and thus open, the container.

A further advantage of the alignment of the line of weakness 13 with an edge on a flange 8 20 bonded to the tab 12 of the opening means is that the flange edge controls the direction of propagation of a tear initiated in the tab 12 of the opening means 11. The tear is guided by the flange edge such that it propagates substantially adjacent to said flange edge. This enables a controlled tearing of the closure flap 6 and thus a controlled opening of the container. An example of the propagation of the tear along the line of weakness 13 towards and subsequently 25 through the triangular area of film 9f is shown in Figures 7 and 8.

The line of weakness 13 is preferably formed when the blank 1 is formed. Alternatively, the line of weakness 13 is formed in the tab 12 of the opening means 11 after the blank 1 has been folded to form a container and either following, or at substantially the same time as, the flanges 30 8 are bonded to said tab 12. This enables the line of weakness 13 to be precisely aligned with

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the flange 8 in the manner described above. Forming the line of weakness 13 after or during bonding of the container also removes the need to ensure the tab 12 and flanges 8 are brought together accurately such that the line of weakness 13 is positioned exactly as previously described. This enables the container to be made more quickly and easily than if the line of 5 weakness were formed prior to folding of the blank 1 in to the container.

In addition, forming the line of weakness 13 may involve weakening or cutting a portion of the flange 8 after it is bonded to the tab 12 of the opening means 11. For example, the flange 8 and tab 12 may be bonded together and then, subsequently, a cut is made through overlapping 10 portions of both the tab 12 and the flange 8. This would result in a line of weakness being quickly and simply formed in the tab 12 which is adjacent and abutting an edge of the flange 8.

. As above, this would allow the flange 8 and tab 12 to be bonded together quickly, without the need to align precisely to a pre-formed line of weakness 13.

15 The line of weakness 13 may be formed in the paperboard or the paperboard and laminate by scoring the tab 12 of the opening means 11 with two knives l-2mm apart, by cutting through said tab 12, or by forming a cutout, for example by removal of a 3mm wide piece of paperboard from said tab 12 during the manufacture. It will be understood that the line of weakness 13 may also be a point or notch which enables a user to more easily initiate a tear in a single sheet of 20 paperboard or laminated paperboard. It will also be understood that the line of weakness 13, for example a score line, may continue in the tab 12 adjacent the flange and further continue along the inside, laminated face of the closure flap 6 or along the fold line connecting the flange 8 to the triangular side walls 4, 5, such that tearing open the container is further simplified. An example of the tear propagating in this manner is shown in Figure 8. >

25

The container shown in Figures 2 and 3 is ready to receive a sandwich. Once the container has been filled the closure flap 6 is closed and heat sealed to the flange 8 of the container. Modified atmosphere packaging techniques, for example vacuum packaging or flushing the container with an inert gas, can be used as required.

The invention is not considered to be limited to the configurations and materials described above, for example, the line of weakness 13 may be formed in the ends 14 of the flange 8 proximate the tab 12, rather than the tab 12 itself - the inventive principle of initiating a tear in one layer of paperboard before another and said tear being guided by an edge would remain.

5

While the description is limited to a container formed from a paperboard blank, the principles of the invention would also be applicable to similar containers made by other means. Furthermore, the shape of the container and the blank 1 from which it can be formed may vary from that described as may the dimensions and, to a certain extent, the materials used. For 10 example, a container formed from a blank in which the closure flap 6 hinges along one of its longest sides is shown in Figure 9. The principle of the tear opening means described above is

I

Claims (18)

CLAIMS - 10-
1. A container including opening means, said opening means comprising a tab, 5 wherein said tab is bonded to a first flange of said container and said tab includes a line of weakness which abuts an edge on said first container flange such that, in use, opening of said container is achieved by initiating a tear in the tab of the opening means along the line of weakness.
10
2. A container according to claim 1, wherein the line of weakness is a partial depth cut line.
3. A container according to claim 1, wherein the line of weakness is a cutout portion.
15
4. A container according to claim 1, wherein the line of weakness is a cut-through portion.
5. A container according to any of the preceding claims, wherein the opening means is bonded to a second flange of said container.
20
6. A container according to claim 5, wherein a layer of heat sealable film is provided between the first and second container flanges and bonded to the opening means.
7. A container according to claim 6, wherein an end of the line of weakness abuts the edge of the layer of heat sealable film. t
25
8. A container according to claim 6 or claim 7, wherein the line of weakness does not overlap the layer of heat sealable film.
9. A container according to any of the preceding claims, wherein said container is formed
30 from a folded blank.
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10. A container according to any of the preceding claims, wherein the bonding is such that the container is hermetically sealed.
5
11. A container according to any of the preceding claims, further comprising a closure flap, and wherein said closure flap includes the tab.
12. A blank for forming a container according to any of the preceding claims.
10
13. A method of forming a container from a blank according to claim 12, comprising the steps of a) bonding the tab of the opening means to the first flange of said container and
15 b) forming a line of weakness in said tab which abuts an edge on said first container flange.
14. A method according to claim 13, wherein step (a) is performed before or substantially simultaneously with step (b) such that the line of weakness formed in the tab of the opening
20 means is aligned with the edge of the first flange bonded to said tab.
15. A method according to claim 13, wherein step (b) is performed when the blank is formed.
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25
16. A container substantially as herein described with reference to the accompanying drawings.
17. A blank substantially as herein described with reference to the accompanying drawings.
18. A method of forming a container substantially as herein described with reference to the 30 accompanying drawings.
GB201201874A 2012-02-02 2012-02-02 Tear opening means for a paperboard container Withdrawn GB2499009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB201201874A GB2499009A (en) 2012-02-02 2012-02-02 Tear opening means for a paperboard container

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB201201874A GB2499009A (en) 2012-02-02 2012-02-02 Tear opening means for a paperboard container
PCT/GB2013/000041 WO2013114072A1 (en) 2012-02-02 2013-02-04 Tear opening means for a paperboard container

Publications (2)

Publication Number Publication Date
GB201201874D0 GB201201874D0 (en) 2012-03-21
GB2499009A true GB2499009A (en) 2013-08-07

Family

ID=45896570

Family Applications (1)

Application Number Title Priority Date Filing Date
GB201201874A Withdrawn GB2499009A (en) 2012-02-02 2012-02-02 Tear opening means for a paperboard container

Country Status (2)

Country Link
GB (1) GB2499009A (en)
WO (1) WO2013114072A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1827636A (en) * 1929-03-07 1931-10-13 Charles H Ames Means for sealing packages
US4313542A (en) * 1979-07-13 1982-02-02 Champion International Corporation Single-serving pie carton and blank
GB2397573A (en) * 2002-12-10 2004-07-28 Rapid Action Packaging Ltd Cartons for sandwiches
GB2441314A (en) * 2006-08-29 2008-03-05 Rapid Action Packaging Ltd Blank preparation, plastic sheet laminated to card
GB2441523A (en) * 2006-09-05 2008-03-12 Rapid Action Packaging Ltd Food carton opened by severance of lines of weakness
GB2481491A (en) * 2010-06-23 2011-12-28 Intel Corp Memory controller that monitors the operation of the memory to determine the operating voltage and frequency of the memory.

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