Packaging containing an adhesive protected by a peelable film

Abstract

The invention relates to packaging comprising: - a backing panel (13) a portion of which is coated with an adhesive (20), said adhesive extending from an edge of said backing panel, and - a peelable film (30) covering said adhesive, an end edge (31) of which extends along the edge of said backing panel and overhangs at least one side of said adhesive. According to the invention, the edge of the backing panel and the end edge of the peelable film form, at the level of said adhesive, a notch (40) the depth (P40) of which varies such that the depth of the notch in a first area located on the side of the peelable film that overhangs said adhesive is strictly less than the depth of the notch in a second area located away from said side. Figure for the abstract: Fig. 3

Description

Description Title of the invention: Packaging comprising an adhesive protected by a peelable film Technical field of the invention

[0001] — The present invention relates generally to the field of packaging, and particularly that of cardboard packaging.

[0002] = It relates more specifically to packaging comprising: - a supporting wall, part of which is coated with an adhesive, said adhesive extending to starting from the edge of said supporting wall, and - a peelable film that covers said adhesive and one end edge of which extends the along the edge of said support wall and extends beyond at least one side of said adhesive.

[0003] — It also relates to a method for manufacturing such packaging. State of the art

[0004] — The sending of parcels by carriers has developed considerably during the years past, particularly in the context of digital commerce.

[0005] — In this context, packaging is used to contain a large variety of items of different shapes and capable of withstanding transport conditions and difficult deliveries.

[0006] — For example, American-style box packaging is well known. Such The packaging comprises four walls hinged to each other by lines of fold parallel lines so that these walls, once folded at right angles in pairs, form a belt. On each side is hinged a lower flap and a flap upper. The lower flaps are fixed to each other to form the bottom of the packaging.

[0007] It is known to cover at least one of the upper flaps with a strip of adhesive protected by a removable film (hereinafter referred to as a peelable film). Thus, when The package is full; it can be securely closed by removing the peelable film. to ensure that the adhesive strip sticks the top flap to the other top flaps and This securely closes the package.

[0008] — In warehouses where these packages are filled with items, the operators tra- These are generally best done with gloves. It's then understandable that removing the films Peelable materials often prove difficult to remove.

[0009] = It is in this context that it was planned to make the peelable films overflow from a few millimeters (usually about 3 mm) on either side of the strips of adhesives. Thus, these films are easier to grip. Unfortunately, it is not yet easy enough, especially for operators who carry gloves. Presentation of the invention In order to remedy the aforementioned drawback of the prior art, the present invention proposes to cut the edge of the wall supporting the adhesive and the peelable film in such a way that the removal of this film is significantly easier. More particularly, the invention proposes a packaging as defined in the introduction, in which the edge of the support wall and the end edge of the peelable film form, at the level where the adhesive is located, a notch whose depth varies in such a way that the depth of this notch in a first zone located on the side of the peelable film which extends beyond said adhesive is less than the depth of the notch in a second zone which is further away from said side than the first zone. Thanks to the invention, the peelable film thins out on the side where it extends beyond the adhesive. This forms a sort of wedge or tab at its end that is not, or only slightly, adhered to the substrate and is therefore easily grasped by an operator (or a dedicated machine), even if the operator is wearing gloves. Thus, the peeling of the film is made much easier. Other advantageous and non-limiting features of the packaging according to the invention, taken individually or in all technically possible combinations, are as follows: - the depth of the notch is non-zero across the entire width of the adhesive; - the depth of the notch is zero in at least part of the area where the peelable film overflows from said adhesive; - the depth of the notch varies continuously; - the edge of the notch has a straight side and a concave curved side; -the end edge of the peelable film forms, where it extends beyond said adhesive, a point or a tab of a width less than a width that the peelable film presents at a distance from said end edge: - said notch has an edge which is wavy at least on the side where the peelable film extends beyond said adhesive; - the support wall has a fold line which extends from a point on the edge of said support wall which is located at a distance from said notch, to the edge of said notch; - the area coated with the adhesive forms a longitudinal strip and the peelable film also forms a strip whose width is strictly greater than the width of said area; - the adhesive and said peelable film extending from one to the other on two opposite sides of the edge of said support wall, said peelable film extending beyond said adhesive at at the level of the two opposite sides of the edge of said support wall, said notch is located in one of the two sides and another notch is provided located in the other of the two sides, said other notch having a depth which varies in such a way that the depth of said other notch in a first zone located on the side of the peelable film which overflows from said adhesive is strictly less than the depth of said other notch in a second zone which is further away from said side; - said support wall is made of cardboard. The invention also relates to a method for manufacturing packaging as described above, comprising steps consisting of: - cover the supporting wall with the adhesive and the peelable film, then - cut the backing panel and the peelable film to form the notch. Of course, the various features, variants, and embodiments of the invention can be combined in various ways, provided they are not incompatible or mutually exclusive. Detailed description of the invention The description that follows, with regard to the attached drawings, given by way of non-limiting examples, will make it clear what the invention consists of and how it can be carried out. Regarding the attached drawings: [Fig.1] is a schematic perspective view of packaging according to the invention; [Fig.2] is a schematic plan view of one of the walls of the packaging of [Fig.1]; [Fig.3] is a detailed view of area III of [Fig.2]; [Fig.4] is a perspective view of zone III of [Fig.2], as part of a peelable film is peeled away from the adhesive on which it is held; [Fig.5] is a homologous view of [Fig.3], illustrating a first variant of the realization of the packaging of [Fig.1]; [Fig.6] is a homologous view of [Fig.3], illustrating a second variant of the packaging of [Fig.1]. As a preliminary point, it should be noted that in the plan views (here, Figures 2, 3, 5, and 6), the dashed lines represent pre-folding lines (hereafter referred to as "fold lines"). A fold line is an area of ​​least resistance that ensures the fold between two panels occurs in the desired position. It can be created in various ways. When the panels are made from a multi-layered sheet of cardboard, it can be created by creasing, using a press, or by half-cutting. The creasing operation consists of indenting the A multi-layered cardboard sheet is scored along the desired line. The kiss-cutting operation involves cutting only a portion of the cardboard sheets along this line. The crease line can also be created in other ways, typically by alternating creasing or kiss-cut lines with cutting lines. In [Fig.1], a package 10 has been shown. This packaging could be of any shape. It could typically be an envelope or a box of any size. The example shown in [Fig. 1] is an American-style box, which, as a reminder, has four side panels 11 hinged together by parallel fold lines so that these panels, when folded at right angles in pairs, form a band. Each side panel 11 has a lower flap (not visible) and an upper flap 12, 13 hinged together. The lower flaps cooperate with each other or are fixed to each other to form the bottom of the package. The upper flaps 12, 13 are designed to close the package when it is full. Regardless of the packaging method, a portion of it is coated with an adhesive, allowing, for example, the packaging to be securely resealed. This adhesive is covered with a peelable film, that is, a protective film that can be removed from the adhesive so that it can adhere to a portion of the packaging. In the embodiment illustrated in the figures, the adhesive 20 is located on one of the upper flaps 13 (which therefore forms a "support wall") and it allows the packaging 10 to be closed by sticking this upper flap 13 onto the opposite upper flap 12. Packaging 10 is shown in [Fig.1] once in volume, but it is delivered flat and is formed by cutting a flat panel (usually called a "blank"). More specifically, it is generally carried out by applying the adhesive 20 and its peelable film 30 to a large panel, then cutting and crushing this panel. The blank is preferably made from a multi-layered cardboard sheet (here with three superimposed layers, including a corrugated layer sandwiched between two flat layers). Alternatively, the blank could be pre-cut from a panel made of another material, for example, plastic. In [Fig.2], the upper flap 13 has been shown in detail. It is shown here in a rectangular shape, although it could also be shown in another shape. Thus, in this embodiment, the edge of this upper flap 13 has four sides, including a side 13C which is attached to the corresponding side wall 11 of the packaging 10, a free side 13D opposite, and two lateral sides 13A, 13B. The adhesive 20 is located on an inner face of this upper flap 13 (that is, on a face intended to be turned towards the inside of the package 10 once it is closed). It could extend into any shape. Here, this adhesive is formed by a strip of constant width, which extends parallel to the free side 13D of the edge of the upper flap 13, at a distance from the flap itself. This adhesive strip 20 then extends from one to the other along two lateral sides 13A, 13B of the upper flap 13. The adhesive 20 is not visible on the plan figures since it is hidden by the peelable film 30. However, the parallel edges of the adhesive strip 20 have been represented on these figures as dashed lines. The peelable film 30 covers the entire adhesive 20. This peelable film 30 therefore has here a strip shape, with two parallel sides and two end edges which extend at the level of the two lateral sides 13A, 13B of the upper flap 13. The peelable film 30 extends beyond the adhesive 20 to facilitate handling. It extends at least at both end edges, making it easier to grip at both ends. In practice, here, the peelable film 30 has a width Lio over its entire length that is strictly greater than the width Lay of the adhesive strip 20 so as to overhang on either side of it by at least 1 mm (here about 3 mm). As shown in more detail in figures 3 and 4, the upper flap 13 and the peelable film 30 are cut, at the ends of the latter, by notches 40. The two notches 40, in the embodiment shown here, have symmetrical shapes; only one of them will be described here (namely, the one shown in Figures 3 and 4). Of course, alternatively, these shapes could not be symmetrical. This notch 40 is made at the time of cutting the blank coated with the peelable film 30. It therefore goes through the upper flap 13 and the peelable film 30. In other words, the edges of these two elements at the notch 40 overlap perfectly. This notch 40 is made in relief in the upper flap 13 and the peelable film 30, so that it extends back from the straight line L,34 formed by the corresponding lateral side 13A of the edge of the upper flap 13. In the remainder of this presentation, the notion of depth Pa of notch 40 will then designate the distance between the edge of notch 40 and this straight line L;,4, measured perpendicularly to this straight line. According to a particularly advantageous feature of the invention, this depth P4 varies between the two sides of the peelable film 30, and is shallower on one of these sides than in an area further away from that side. In practice, here, this depth P4 is shallower on one side of the peelable film 30 than at its center. The underlying idea is that the notch 40 cuts into the end edge 31 of the peelable film 30 primarily where the adhesive is located, and that the side of this end edge is not or only slightly cut. Because this side is not covered with adhesive, it is more easily grasped by an operator wearing gloves. In practice, the notch 40 extends over the entire Lay width of the adhesive strip 20. Preferably, however, it does not extend over the entire Lay width of the peelable film 30, so that at least one of the two areas of this film that does not cover adhesive 20 is not cut by this notch 40. Preferably, the depth P4 of the notch 40 varies continuously. Thus, when an operator grasps the peelable film 30 to detach it from the adhesive 20, this film does not tear. Thanks to this continuous variation of the depth P4 of the notch 40, one of the corners of the peelable film 30 forms an easily graspable point. Alternatively, as shown in [Fig. 5], the depth P4 of the notch 40 could vary in steps. In this variant, the corner of the peelable film 30 then has an easily graspable tab shape. In the embodiment of [Fig. 3], the edge of the notch 40 has a straight side 42 extending orthogonally to line L;34, and a curved side 41 that is concave (this side having a general elliptical shape). The straight side 41 is located outside the peelable film 30, so that the edge of the notch 40 that lies at the level of this film is entirely curved. The shape of this notch 40 is such that only one of the corners of the end edge 31 of the peelable film 30 forms an easily graspable point. This corner is preferably the one located on the side of the free edge 13D of the upper flap 13. Alternatively, as shown in [Fig. 6], the edge of the notch 40 could be entirely concave and have a general semicircular shape, so that the two corners of the end edge 31 of the peelable film 30 form easily graspable points. In this variant, it is preferable for the peelable film 30 to extend beyond both sides of the adhesive strip 20. Conversely, in Figs. 3 and 5, it could extend only one side of the adhesive strip 20. To further facilitate the handling of the peelable film, it is possible to provide other additional features. First, as shown in [Fig. 3], the edge of the notch 40 can, at least on the side by which it will be caught, be corrugated. These corrugations, which here form regular waves, make it possible to generate hollows and protrusions, which protrusions facilitate the peeling of the peelable film 30. Of course, the corrugations could have different shapes, for example sawtooth shapes, or different sizes. In the embodiment shown in [Fig.3], these undulations extend over the entire curved side 41 of the notch 40, but not over its straight side 41. As shown in [Fig.5], they could extend over a very restricted part of the edge of the notch 40. Alternatively, they could extend over the entire length of the edge of the notch. Next, a folding line 14 is preferably provided in the upper flap 13, shaped to allow a corner of this flap to fold outwards in order to cause the peeling end of the film 30 to detach. Here, this folding line 14 extends from the free side 13D of the upper flap 13 to the edge of the notch 40. It extends at approximately 45 degrees from line L;34. The present invention is in no way limited to the embodiments described and re-presented, but a person skilled in the art will be able to make any variation in accordance with the invention. Typically, the packaging could be made not from cardboard, but from a simple sheet of paper, for example, to form a mailing envelope. However, preferably, the invention applies to more rigid packaging, particularly cardboard or plastic. Indeed, this type of packaging is generally formed by first applying the adhesive and peelable film to the cardboard or plastic blank, then cutting the entire assembly in a single pass to create the notch. It is this simultaneous cutting of the blank and the peelable film that makes the latter difficult to grasp, hence the advantage of providing a notch. In the embodiment illustrated in the figures, the adhesive extends from an outer edge of the upper flap 13, and the notch 40 is recessed into this outer edge. Thus, the peelable film 30 can be easily removed by grasping it at this notch 40.It should be noted, however, that as an alternative, the edge of the top flap from which the adhesive extends, and at which the notch is located, could be an inner edge rather than an outer one. In other words, the top flap could have an opening (for example, in its center), and the notch could be recessed into the edge of this opening. Thus, the peelable film could be removed by grasping it at this opening. And if the peelable film extended on either side of the opening, in two parts, two recessed notches could be incorporated into the inner edge of the opening.

Claims

Claims

1. Packaging (10) comprising: - a support wall (13) one area of ​​which is coated with an adhesive (20), said adhesive (20) extending from an edge of said support wall {13),and - a peelable film (30) which covers said adhesive (20) and one edge of which end (31) extends along the edge of said supporting wall (13) and overflows on at least one side of said adhesive (20), characterized in that the edge of the supporting wall (13) and the edge end (31) of the peelable film (30) form, at the level of said adhesive (20), a notch (40) whose depth (P40) varies in such a way that the depth (P4) of the notch (40) in a first zone located on the side of the peelable film (30) which extends beyond said adhesive (20) is strictly less than the depth (Pa) of the notch (40) in a second area which is further away from said side than the first area.

2. Package (10) according to claim 1, wherein the depth (P40) of the notch (40) is non-zero across the entire width of the adhesive (20).

3. A package (10) according to claim 1 or 2, wherein the depth (P340) of the notch (40) is zero in at least part of the area where overflows the peelable film (30) overflows said adhesive (20).

4. Packaging (10) according to one of claims 1 to 3, in which the depth (P49) of the notch (40) varies continuously.

5. Packaging (10) according to one of claims 1 to 4, in which the edge of the notch (40) has a straight side (42) and a curved side (41) concave.

6. Packaging (10) according to one of claims 1 to 5, in which the edge end (31) of the peelable film (30) forms, where it overflows from said adhesive (20), a point or a tab of width less than a width that the peelable film (30) has at a distance from said edge end (31).

7. Packaging (10) according to one of claims 1 to 6, wherein said notch (40) has an edge which is wavy at least on the side where the peelable film (30) extends beyond said adhesive (20).

8. Packaging (10) according to one of claims 1 to 7, in which the supporting wall (13) has a fold line (14) which extends from a point on the edge of said supporting wall (13) which is located at a distance from said notch (40), up to the edge of said notch (40).

9. Packaging (10) according to one of claims 1 to 8, in which the area coated with the adhesive (20) forms a longitudinal strip and the film peelable (30) also forms a strip whose width (L30) is strictly greater than the width (Lao) of said zone.

10. Packaging (10) according to one of claims 1 to 9, in which the adhesive (20) and said peelable film (30) extending from one to the other of two opposite sides (13A, 13B) of the edge of said wall- support (13), said peelable film (30) extending beyond said adhesive (20) at level of the two opposite sides (13A, 13B) of the edge of said wall- support (13), said notch (40) is located in one of the two sides (13A, 13B) and another notch (40) is provided located in the other of the two sides (13A, 13B), said other notch (40) having a depth (P49) which varies in such a way that the depth (P40) of said other notch (40) in a first zone located on the film side peelable (30) which protrudes from said adhesive (20) is strictly less than the depth (P49) of said other notch (40) in a second zone distant from said side.

11. Packaging (10) according to one of claims 1 to 10, wherein said support wall (13) is made of cardboard.

12. Method of manufacturing a packaging (10) according to one of the claims- indications 1 to 11, comprising steps consisting of: - cover the support wall (13) with the adhesive (20) and the peelable film (30), Then - cut the support wall (13) and the peelable film (30) so as to form said notch (40).