EP4640586A1

EP4640586A1 - A packaging insert for the protection of a corner of a packed roof window, a packed roof window and a method for packing a roof window

Info

Publication number: EP4640586A1
Application number: EP25171845.8A
Authority: EP
Inventors: Erik Andersen
Original assignee: VKR Holding AS
Current assignee: VKR Holding AS
Priority date: 2024-04-23
Filing date: 2025-04-23
Publication date: 2025-10-29

Abstract

A packaging insert (1) for the protection of a corner of a packed roof window (2) is disclosed. The packaging insert is made from folded cardboard and comprises a base section (10) having a fold line (F) separating a first part (A) of the packaging insert from a second part (B) of the packaging insert. The first part and the second part extend substantially perpendicular to each other in a folded use state of the packaging insert and along two sides of the roof window when in use. Each of a first projection (111, 121) on the first part and a second projection (121, 122) on the second part projects from the base section, and the projections are located in continuation of each other and at a distance from each of longitudinal edges (103) of the base section. The projections comprise projection engagement elements (13), which are om engagement with each other in the folded use state. A packed roof window and a method for packaging are also disclosed.

Description

Technical Field

The present invention relates to a packaging insert for the protection of a corner of a packed roof window, where the packaging insert is made from folded cardboard and comprises a base section having a length direction and a height direction extending perpendicular to a length direction, where the base section comprises two longitudinal edges extending along the length direction and two end edges extending between the longitudinal edges, where the base section comprises a fold line extending along the height direction and separating a first part of the packaging insert from a second part of the packaging insert, where the first part and the second part extend substantially perpendicular to each other in a folded use state of the packaging insert, and where each of a first projection on the first part and a second projection on the second part projects from the base section in a width direction extending perpendicular to a length direction and to the height direction. The invention further relates to a packed roof window and to a method for packing a roof window.

Background Art

When storing and transporting roof windows prior to installation in a roof structure, it is important to ensure that the roof windows are not damaged. Most roof windows are therefore packed individually in a cardboard box and shock-absorbing packaging inserts are arranged along the outer sides and at the corners of the frame of the roof window between the roof window and the cardboard box to provide a cushioning effect in case the packed roof window is dropped or handled roughly. "Outer sides" is here to be understood as the smaller sides facing away from the opening covered by the pane of the roof window, whereas the larger sides extending in parallel with the pane will be referred to as "interior side" and "exterior side", corresponding to the sides intended to face the interior of a building and the exterior, respectively, in the mounted state of the roof window.
The shock-absorbing packaging inserts have traditionally been made of expanded polystyrene (EPS), which is cheap and has excellent shock-absorbing properties, but in later years it has been desired for environmental reasons to reduce the amount of polymers used in packaging.
Paper-based shock-absorbing packaging inserts of the type mentioned in the introduction, known for example from US4000843 , have therefore gained new popularity, but a paper-based packaging insert which protects roof windows even better is desired.

Summary of Invention

With this background it is an object of the invention to provide a packaging insert for the protection of a corner of a packed roof window by which it is possible to reduce the risk of damages to the roof window during storage and transportation.
In a first aspect of the invention, this and further objects are achieved with a packaging insert of the kind mentioned in the introduction which is furthermore characterised in that the first projection and the second projection are located in continuation of each other in the length direction and at a distance from each of the longitudinal edges of the base section, that the first projection comprises a first projection engagement element, and that the second projection comprises a second projection engagement element.
In a second aspect of the invention, the above and further objects are achieved with a packed roof window comprising a roof window arranged in a cardboard box and at least one packaging insert as defined above, where the cardboard box comprises two primary sides extending along an interior side and an exterior side of the roof window and four secondary sides extending between the primary sides, where the first part of the packaging insert is arranged between a first frame member of the roof window and a secondary side of the cardboard box, and where the second part of the packaging insert is arranged between a second frame member of the roof window and a secondary side of the cardboard box.
In a third aspect of the invention, the above and further objects are achieved with a method for packing a roof window comprising:

Providing a cardboard box,
Arranging the roof window in the cardboard box,
Providing a plurality of packaging inserts as defined above,
Folding each packaging insert along the fold line such that the first part extends perpendicular to the second part and such that the first projection engagement element engages with the second projection engagement element, and
Arranging the folded packaging inserts at corners of the roof window.

Below, one common description of the invention will be given, and it is to be understood that although some embodiments may be described as related primarily to one aspect of the invention, they will also apply to the other aspects unless otherwise stated.
By the first projection and the second projection being located at a distance from each of the longitudinal edges of the base section, they will be located between an outer side of the roof window and a secondary side of the cardboard box in the packed state, keeping the roof window at a distance from the cardboard box. The projections thus create a gap between the roof window and the cardboard box, which will provide a cushioning in case the packed roof window is dropped or handled roughly. As compared to a packaging insert of the type known from US4000843 , where the cushioning is provided by a closed compartment of a rectangular cross-sectional shape inside the packaging inside, the use of projections allow an adaptation to the shape of the outer side of the roof window. The projections may be located such that they will project over, under, or between projecting parts of the roof window. As one example, the projections may project underneath a covering member provided on an exterior side of the frame of the roof window, i.e. a side intended to face the exterior in the mounted state of the roof window. This in turn will allow the loads on the roof window resulting from a transmission of force between the roof window and the projections to affect the roof window where it is the strongest. Typically, the projections will be located such that they contact the frame of the roof window.
By the first projection and the second projection being located at a distance from each of the longitudinal edges of the base section, the risk of the first and/or second projection being pressed aside and into a space between the roof window and a primary side of the cardboard box is considerably reduced. The projections thus stay in contact with the outer side of the roof window, providing some protection of the roof window, even if they are deformed.
By the first projection engagement element and the second projection engagement element coming into a mechanical or frictional engagement with each other, the packaging insert is retained in the use state, giving the packaging insert an angled shape suitable for embracing and protecting a corner of a roof window. A mechanical engagement is to understood as an engagement where one projection engagement element physically hinders another projection engagement element from moving, whereas a frictional engagement is to be understood as an engagement where the two projection engagement elements press against each other. The two types of engagement may be combined so that a frictional engagement hinders the movement necessary to break or open a mechanical engagement between two projection engagement elements.
The engagement between the projection engagement elements results in material of the first projection and material of the second projection overlapping. When using packaging inserts where the first part and the second part just abut on each other in a 45 degrees angle, such as the one known from US4000843 , experience has shown that the roof window tends to press itself in between the two parts, leaving only the base section and the cardboard box to protect the roof window. The overlap established by the engagement between the first projection engagement element and the second projection engagement element hinders such movement of the roof window.
At least one of the first projection engagement element and the second projection engagement element may be hook-shaped and/or the first projection engagement element and the second projection engagement element may be substantially identical, possibly mirror-inverted.
At least one of the first projection and the second projection may be elongate with its longest dimension extending along the length direction of the base section to provide a longer / bigger area of contact with the roof window than if using a more local projection. It is presently considered advantageous that the length of each of the elongate projections along the length direction is at least 15 cm, preferably at least 20 cm, said length being measured where the projections contact the roof window when in use.
The first and second projections do not need to be contact with the roof window in the packed state of the roof window, but this will usually be the case. If the packed roof window is arranged so that it rests on one of the secondary sides of the cardboard box, the roof window will be forced towards the part(s) of the packaging insert(s) extending along this secondary side under the influence of gravity. In that case only the projection(s) on this/these part(s) may be in contact with the roof window. It is, however, also possible to use packaging inserts, which are slightly over-size so that they are jammed between the secondary sides of the cardboard box and the outer sides of the roof window. In that case, packing insert(s) provided on the opposite side of the roof window compared to the side on which the packed roof window rests may remain in contact with the roof window at all times.
The projections may be collapsible, for example by being hollow, allowing them to yield under pressure. This may allow the projections to give way in case the packed roof window is exposed to excessive force, for example by being dropped. One or more projections may then absorb at least some of the force of the impact, thereby protecting the roof window.
In one embodiment at least one of the first part and the second part comprises two projections at different levels in the height direction. If two projections are provided on both the first and the second part and at the same levels they may all be provided with projection engagement elements to provided two sets of overlapping and engaging projections. It is also possible to have three or more projections at different levels in the height direction.
The different levels may be determined by the design of the roof window or by mechanical considerations to achieve the best possible shock-absorbing properties, and the projections at different levels may have different sizes and/or shapes to make the packaging insert match the shape of the roof window.
In one embodiment the projections are arranged symmetrically about the length direction, such that they are located at the same distances from the longitudinal edges. This will mean that it will not matter which side of the packaging insert is up or down in the packed state, thereby eliminating the risk of the packaging insert being arranged in a wrong position, which could result in suboptimal protection of the roof window. If having only one projection on each part, a similar effect may be achieved by each projection being at the centre of the base section, seen along the height direction, and preferably having a symmetrical cross-sectional shape.
Additionally, or alternatively, the first part and the second part may be of the same length so that the same length of the outer side of the roof window is covered regardless how the packaging insert is arranged.
It is presently considered advantageous that the length of each of the first part and the second part along the length direction is at least 15 cm, preferably at least 20 cm. The optimal length may depend on the size of the roof window. It is presently considered advantageous that at least 30% of length/width of the roof window is cover by packaging inserts, and for larger roof windows packaging inserts as described above embracing the corners of the roof window may be used in combination with other linear packaging inserts. Such linear packaging inserts may for example be made from honeycomb cardboard or multilayer corrugated cardboard.
In one embodiment, the height of the base section along height direction corresponds to interior dimension of the cardboard box. This will allow the base section to reinforce the secondary sides of the cardboard box, thereby giving the cardboard box a better compressive strength, which is advantageous when stacking packed roof windows on top of each other.
In one embodiment the projections are made from folded cardboard, and they may be made from the same sheet of cardboard, possibly even from the same sheet of cardboard as the base section, so that the packaging insert can be made from one single sheet of cardboard. This may be achieved by folding the sheet of cardboard such that one section of the sheet forms the base section and the projection(s) is/are formed on another section. It is, however, also possible to simply fold projections on the section forming the base section and subsequently stabilizing these folded projections, for example by applying an adhesive tape spanning the concave side of a folded projection. Making the packaging insert from one sheet of cardboard may facilitate production and/or keep costs down.
Making one or more projections from a separate sheet of cardboard may allow the use of different cardboard materials, such as corrugated cardboard for the projections and multilayer corrugated cardboard for the base section, thereby giving them different properties.
It is also possible to fold the projections and a base section from one sheet of cardboard and then attach them to another piece of material to achieve a stronger base section. This may for example help in reinforcing sides of the cardboard box as described above. The other piece of material may be cardboard but could also be for example a paper-based honeycomb material or a wood-based material.
If made from cardboard by folding, each projection will typically have two legs extending from the base section and converging towards each other, giving the projection a trapezoidal or triangular cross-sectional shape.
In embodiments where two projections on the same part of the packaging insert have converging sides, the distance between these two projections in height direction at the base section may be less than 5 mm, preferably less than 1 mm. In this way the projections may support each other at the base section, thereby hindering a collapse of the projections. Ideally for this purpose the distance between the two projections would be zero, but this may not be possible in practice, especially when the two projections are made from one sheet of folded cardboard.
In embodiments, where the entire packaging insert is made from one sheet of cardboard, where one section of the sheet forms the base section and the projection(s) is/are formed on another section, two edges of the sheet may located at one of the longitudinal edges of the packaging insert. Thereby a fold is eliminated and a joint on a surface of the packaging insert, which may influence on the strength and/or stiffness of the packaging insert, is avoided. However, if the packaging insert comprises two or more projections on each part, the joint may be located between projections, whereby it may contribute to stabilizing the projections, particularly if an adhesive is used at the joint. Here is has been assumed that the sheet of cardboard is folded along fold lines extending in parallel to the length direction, but is it noted that the invention is not limited to such embodiments.
Regardless if made from folded sheet of cardboard or from a different material, such as blocks of honeycomb cardboard or multilayer cardboard, the projections may be attached to the base section by means of an adhesive, such as a hotmelt glue. Alternatively, or additionally, staples or other mechanical means for attachment may be use. If one or more projections form part of a sheet of material, this sheet may be attached to the base section in a similar way. If the entire packaging insert is made from one sheet of cardboard, where one section of the sheet forms the base section and the projection(s) is/are formed on another section, the two sections may be interconnected in a similar way.
In embodiments where one section of a sheet forming the base section and the projection(s) is/are formed on another section, this other section may it itself comprise two or more subsections. As an example, the projections of the first part of the packaging insert may be formed on a first subsection and the projections of the second part of the packaging insert may be formed on a second subsection, said subsections possibly being entirely separated from each other but connected to the base section. Such a separation of a first subsection and a second subsection will typically extend along the fold line, making the packaging insert less stiff at the fold line and thereby potentially facilitating folding. A similar separation to facilitate folding may also be found in embodiments, where the projections are form on sheet(s) of cardboard separate from the base section.
Above the packing insert and the use thereof has been described only with reference to embodiments where the first part extends along a first frame member of the roof window and second part extending along a second frame member of the roof window, i.e. where the packaging insert embraces a corner of the roof window. The packaging insert may, however, also be used in an un-folded state, where it not folded along the fold line. In this un-folded state the base section is linear and the first projection and the first projection engagement element and the second projection engagement element are not in engagement with each other. The un-folded packaging insert will typically be arranged at the outer sides of the roof window, for example between two folded packaging inserts each arranged at a corner of the roof window, but it may also be arranged on the pane of the roof window to protect it from impact or to keep the primary side of the cardboard box at a distance from the pane, for example to prevent abrasive damage.

Brief Description of Drawings

In the following description embodiments of the invention will be described with reference to the schematic drawings, in which

Fig. 1 is a perspective view of a packaging insert in an un-folded state,
Fig. 2 is a perspective view of the packaging insert in Fig. 1 in a folded use state,
Fig. 3 is a series of sketches illustrating how projection engagement elements of the projections of the packaging insert in Fig. 1 and 2 come into engagement with each other,
Fig. 4 is a perspective view of another packaging insert in an un-folded state,
Fig. 5 shows the detail marked IV in Fig. 4 seen from the side,
Fig. 6 shows the detail marked IV in Fig. 4 seen from above,
Fig. 7 is a detail seen from above of a another packaging insert in an un-folded state,
Fig. 8 is a perspective view of another packaging insert in an un-folded state,
Fig. 9 is a perspective view of another packaging insert arranged at a roof window,
Fig. 10 corresponds to Fig. 9, only seen from a slightly different angle and with the cardboard box in an assembled state,
Fig. 11 is a perspective view of another packaging insert arranged at a roof window,
Fig. 12 is a cross-sectional sketch of a packaging insert arranged at a roof window,
Fig. 13 is a cross-sectional sketch of another packaging insert arranged at a roof window,
Fig. 14 is a perspective view of another packaging insert in an un-folded state,
Fig. 15 shows the packaging insert in Fig. 14 seen along the length direction,
Fig. 16 shows the blanks used for making the packaging insert in Fig. 14 and 15 and for making a linear packaging insert, and
Fig. 17 shows a cross-section of the packaging inserts made with the blanks in Fig. 16.

Description of Embodiments

Referring initially to Fig. 1 a packaging insert 1 for the protection of a corner of a packed roof window is shown in an un-folded state. The packaging insert is made from folded corrugated cardboard and comprises a base section 10 and two sets 11, 12 of projections. Each set of projections comprises a first projection 111, 121 projecting from a first section 101 of the base section and a second projection 112, 122 projecting from a second section 102 of the base section. The projections project in a width direction W extending perpendicular to a length direction L and to a height direction H of the base section 10.
In the folded state shown in Fig. 2, the packaging insert 1 has been folded along a fold line F extending along the height direction H and separating a first part A of the packaging insert from a second part B of the packaging insert. In the folded use-state of the packaging insert shown in Fig. 2, the first part A and the second part B extend substantially perpendicular to each other allowing them to embrace a corner of a packed roof window as will be shown later.
The first projection 111, 121 and the second projection 112, 122 of each set are located in continuation of each other in the length direction L and at a distance from each of the longitudinal edges 103 of the base section 10. In this embodiment the projections are elongate with their longest dimensions extending along the length direction L and extend all the way out to the end edges 104 of the base section 10, but this may not be the case in other embodiments.
In the embodiment in Fig. 1 and Fig. 2, the two sets 11, 12 of projections are identical except mirror-inverted and are arranged symmetrically about the length direction L, such that they are located at the same distances from a respective longitudinal edge 103. This means that the packaging insert looks the same no matter if it is arranged as shown in Fig. 2 or upside-down. This in turn means that the risk of the packaging insert being arranged incorrectly when in use is low.
As is best seen in Fig. 1, each of the first projections 111, 121 and each of the second projections 112, 122 comprises a projection engagement element 13. These projection engagement elements are configured for coming into engagement with each other and lock the projections to each other to lock the packaging insert in the state shown in Fig. 2, once it has been folded along the fold line F.
The shape and function of the projection engagement elements 13 are shown in more detail in the schematic representation in Fig. 3, where the projection engagement element shown on the first projection 121 of the second set 12 and on the second projection 112 of the first set 11 in Fig. 1 is designated 13a and the projection engagement element shown on the first projection 111 of the first set 11 and on the second projection 122 of the second set 12 in Fig. 1 is designated 13b.
When the base section 10 is folded along the fold line F, which extends into the drawing plane in Fig. 3, the two projection engagement elements 13a, 13b turn in relation to each other. In Fig. 3 this is shown by a turning of the second projection engagement element 13b, while the projection engagement element 13a is shown as remaining stationary as is seen by comparing Fig. 3a and Fig. 3b.
As the folding and hence the mutual turning progresses the tip section 131 of the second projection engagement element 13b comes in underneath the first projection engagement element 13a as shown in Fig. 3c, and sections 132, 133 of the first projection engagement element 13a come in underneath the second projection engagement element 13b as indicated in Figs 3d and 3e.
When a 90 degrees folding has been achieved, the two triangular recesses 134, 135 in the two projection engagement elements 13a, 13b come into engagement with each other as seen by comparing Fig. 3f and 3g, thereby locking the two projection engagement elements to each other. Furthermore, the tip section 131 of the projection engagement element 13b and the end surface 136 of the projection engagement element 13a comes into engagement with base section 10, thereby blocking a further folding of the packaging insert.
In additional to the mechanical locking of the two projection engagement elements 13a, 13b to each other achieved by the engagement of the two recesses 134, 135, the sections 131, 132, 133 having been inserted under other sections of the projections will press against the inner sides of these other sections due to the elasticity of the cardboard material, thus creating friction which will also hinder unfolding of the packaging insert.
In the embodiment shown in Fig. 2, the projection engagement element on the first projection 111 of the first set 11 is identical to that on the second projection 122 of the second set 12 and that on the second projection 112 of the first set is identical to that on the first projection 121 of the second set. This entails that the packaging insert is truly symmetrical so that it does not matter which side is up or down when the packaging insert is in use.
Another embodiment of a packaging insert is shown in an un-folded state is Fig. 4. In this figure as well as in the following figures the same reference numbers are used as in Figs 1-3 for features having substantially the same function, even if not structurally identical. Only differences between the embodiments will be described. It is to be understood that other features and functions are the same as described with reference to the previous figures.
Just as in Fig. 1 and Fig. 2, the two sets of projections 11, 12 are here made by folding along fold lines extending in parallel to the length direction L and each projection has two legs 14a, 14b extending away from the base section 10 and converging towards each other, giving the projections a triangular cross-sectional shape. Whereas the projections in Fig. 1 and Fig. 2 have the cross-sectional shape of a right-angled triangle and are arranged at a distance D from each other in the height direction H, the projections in Fig. 4 have a cross-sectional shape of a isosceles triangle and are abutting each other at the base section 10, i.e. having a distance of less than 1 mm.
The embodiment in Fig. 4 has been found to have a bigger compression strength in the width direction W than the embodiment in Fig. 1 and Fig. 2, both due to the cross-sectional shape of the projections 11, 12 and to the projections supporting each other where they meet at the base section 10.
Both the packaging insert in Fig. 4 and that in Fig. 1 and Fig. 2 are made by folding a single sheet of corrugated cardboard. The two edges of the sheet together form the lower longitudinal edge in Fig. 2 and the lefthand longitudinal edge 103a in Fig. 4, while the upper longitudinal edge 103 in Fig. 2 and the righthand longitudinal edge 103b are formed by a fold on the sheet. As may be seen faintly in Fig. 2 and Fig. 4 the cardboard has been weakened by intermittent slits going half way through the cardboard at the fold forming a longitudinal edge 103b. This facilitates the folding and helps to provide a straight longitudinal edge of the packaging insert. In both embodiments, the section of the sheet on which the projections 11, 12 are formed is attached to the section forming the base section 10 by means of an adhesive. Where the two projections 11, 12 meet each other and the base section in the embodiment in Fig. 4, a hotmelt glue 15 has been used and can be seen.
The projection engagement elements 13a, 13b of the embodiment in Fig. 4 are shown enlarged and from different angles in Fig. 5 and Fig. 6. They are considerable simpler than the ones in Figs 1-3, being formed largely of a triangular cut-out in each of the projections 11, 12. When folding the base section 10 at the fold line F the tip section 131 of the lefthand projection engagement element 13b comes into the recesses 134 in the righthand projection engagement element 13a and the tip section 132 of the righthand projection engagement element 13a comes into the recess 135 in the lefthand projection engagement elements 13b. When the folding reaches 90 degrees, the ends of the two recesses 134, 135 engage with each other, and the end surfaces 136 abut the base section 10. There is no mechanical locking of the two projection engagement elements to each other as in the embodiment in Figs 1-3, but the friction between the tip sections 131, 132 and the legs of the projections under which they have been inserted will hinder unfolding of the packaging insert. It is noted that the overlapping sections in this embodiment are relatively larger than the overlapping section in the embodiment in Figs 1-3, creating more friction.
A further embodiment of the projection engagement elements 13a, 13b is shown in Fig. 7, where two sets of projections are arranged closely side-by-side and have the cross-sectional shape of a isosceles triangle as described with reference to Fig. 4. The projection engagement elements 13a, 13b in Fig. 7 are a hybrid of those shown in Figs 1-3 and those shown in Figs 4-6, the first projection engagement elements 13a being shaped substantially as those in Figs 1-3 and the second projection engagement elements 13b being shaped substantially as those in Figs 4-6.
In the embodiment in Fig. 7 the two projections of each set have a different width in the height direction and different cross-sectional shapes.
Fig. 8 shows another packaging insert in an un-folded state. Here one set 11 of projections have a cross-sectional shape of a triangle, which is neither right-angled nor isosceles, and the other set 12 of projections have a cross-sectional shape of a right-angled triangle. This means that the packaging insert may need to be used in a particular orientation as it is not symmetrical, but also that the same packaging insert may match the shape of two different roof windows depending on how it is turned.
As in Fig. 1-3, the embodiment in Fig. 8 also has the two sets of projections at a distance D from each other in the height direction H and is folded from a single sheet of cardboard. Here, however, the edges of the sheet meet each other in a joint 18 between the projections, meaning that both longitudinal edges 103 of the packaging insert are created by a fold on the sheet.
The packaging insert in Fig. 8 is shown without projection engagement elements, but it is to be understood that they will be present and may be embodied for example as shown in the previous figures.
The packaging insert in Fig. 8 further comprises four cut-outs 16 at the longitudinal edges 103, which are used for engagement with the cardboard box in the packed state of the roof window.
In Fig. 9 the packaging insert 1 in Fig. 8 is shown in the folded state arranged at the corner of a roof window 2 and in Fig. 10 the packaging insert 1 and the roof window 2 are arranged in a cardboard box 3.
As may be seen in Fig. 9, the packaging insert 1 is arranged with the first set 11 of projections above the second set 12, the first set projecting underneath a sash 21 of the roof window and the second set projecting over a mounting strip 22 at the bottom of the frame 23 of the roof window used for supporting a roofing felt in the mounted state of the roof window.
As may be seen in Fig. 10, a flap 31 of the cardboard box 3 has been bent into one of the cut-outs 16 thereby fixating the packaging insert in relation to the cardboard box. Such a fixation may for example be advantageous if the packaging insert is arranged in the box before the roof window.
Another packaging insert 1 arranged at a roof window 2 identical to that in Figs 9-10 is shown in Fig. 11. Here the projections 11, 12 are flat and engaging with the frame 23 of the roof window below a rubber gasket 24 on the sash 21 and above the mounting strip 22, respectively.
Fig. 12 shows a cross-sectional view of a packaging insert 1 arranged at a roof window 2 as in Fig. 9 except for the packaging insert being embodied substantially as the one in Fig. 4, and Fig. 13 shows another packaging insert 1 arranged at another type of roof window. The packaging insert in Fig. 13 has three projections 11, 12, 17 provided closely adjacent to each other and being of different sizes, so that each of them reaches the part of the roof window, which they are located at. The centre projection 12 projects into a recess formed between a part of the frame 23 and a sash 24 of the roof window.
In Fig. 12 and Fig. 13 the projections 11, 12, 17 are made of a sheet of cardboard separate from the sheet of cardboard forming the base section 10.
In all of the embodiments shown in the drawing, the projections 11, 12, 17 are made from folded corrugated cardboard and having a hollow triangular shape, but it is to be understood that they could also be in the form of blocks of material attached to the base section, that the hollow could be filled by another material, or that the projections could be open at the base section 10.
Another embodiment of a packaging insert 1 is shown in Fig. 14 and Fig. 15, which correspond to Fig. 5 and Fig. 4, respectively.
In this embodiment, the recesses 134, 135 have a flat bottom as in Fig. 5, but the engagement elements 13a, 13b are otherwise shaped largely as in Figs 1-3. The tip section 131 of the second projection engagement element 13b is here formed only by the back side of the projection 111, 122.
In the folded state, this packing insert will look as in Fig. 2.
Incisions 107 in the cardboard material facilitate the folding of the projections 111, 112, 121, 122 and similar incision are found at one of the longitudinal edge 103, where the cardboard material is also folded.
The blank 100 used for making the packaging insert in Fig. 14 and Fig. 15 is shown in Fig. 16 together with a blank 400 for making a corresponding linear packaging insert, which may for example be used at a side of the roof window. Both comprise a series of fold lines G, which form the edges 103 and delimit the projections 11, 12 of the finished packaging insert. These fold lines extend vertically in Fig. 16 and the fold line F used for bringing the packaging insert into its folded state, where it is configured for embracing a corner of a roof window as described above extends horizontally in Fig. 16.
Incisions as those described with reference to Fig. 15 may be provided along one or more of the fold lines G.
Glue 150 used for assembling the packaging inserts are shown as shaped dots and lines interconnecting the dots, and the glue contact areas 150 on the base section 10 are shown in a lighter colour. It is to be understood that the glue could alternatively be or additionally be provided on the glue contact areas.
The blank 100 for making the packaging insert in Fig. 14 and Fig. 15 has a cut-out 300 which forms the engagement elements 13a, 13b in the assembled state of the packaging insert.
The assembled state of packaging inserts made with the blanks 100, 400 in Fig. 16 is shown in cross-section in Fig. 17. As may be seen, one edge 103 is formed by a fold on the cardboard blank, but the shape is other as in Fig. 4 and Fig. 12.

List of reference numerals

1: Packaging insert
10: Base section
100: Blank
101: First section
102: Second section
103: Longitudinal edge
104: End edge
107: Incision
11: Projection
111: Projection
112: Projection
12: Projection
121: Projection
122: Projection
13: Projection engagement element
131: Tip section
132: Section
133: Section
134: Recess
135: Recess
136: End surface
14: Leg of projection
15: Glue
150: Glue contact area
16: Cut-out
17: Projection
2: Roof window
21: Sash
22: Mounting strip
23: Frame
24: Rubber strip
3: Cardboard box
31: Flap
300: Cut-out
400: Blank
A: First part
B: Second part
D: Distance
F: Fold line
G: Fold line
H: Height direction
L: Length direction
W: Width direction

Claims

A packaging insert (1) for the protection of a corner of a packed roof window (2), where the packaging insert is made from folded cardboard and comprises a base section (10) having a length direction (L) and a height direction (H) extending perpendicular to a length direction, where the base section comprises two longitudinal edges (103) extending along the length direction and two end edges (104) extending between the longitudinal edges, where the base section comprises a fold line (F) extending along the height direction and separating a first part (A) of the packaging insert from a second part (B) of the packaging insert, where the first part and the second part extend substantially perpendicular to each other in a folded use state of the packaging insert, and where each of a first projection (11, 111, 121) on the first part and a second projection (12, 121, 122) on the second part projects from the base section in a width direction (W) extending perpendicular to a length direction and to the height direction,
characterised in that the first projection and the second projection are located in continuation of each other in the length direction and at a distance from each of the longitudinal edges of the base section, that the first projection comprises a first projection engagement element (13a, 13b), and that the second projection comprises a second projection engagement element (13a, 13b).
A packaging insert according to claim 1, where each of the first projection and the second projection is elongate with its longest dimension extending along the length direction of the base section.
A packaging insert according to claim 1 or 2, where at least one of the first part and the second part comprises two projections at different levels in the height direction.
A packaging insert according to one or more of the preceding claims, where the projections are arranged symmetrically about the length direction, such that they are located at the same distances from the longitudinal edges.
A packaging insert according to one or more of the preceding claims, where the projections made from folded cardboard.
A packaging insert according to claim 3, claim 4 when depending on claim 3, or claim 5 when depending on claim 3, where each of two projections on the same part has two legs extending from the base section and converging towards each other, giving the projection a trapezoidal or triangular cross-sectional shape, and where the distance between these two projections in height direction at the base section is less than 5 mm, preferably less than 1 mm.
A packed roof window comprising a roof window arranged in a cardboard box and at least one packaging insert according to one or more of claims 1-6, where cardboard box comprises two primary sides extending along an interior side and an exterior side of the roof window and four secondary sides extending between the primary sides, where the first part of the packaging insert is arranged between a first frame member of the roof window and a secondary side of the cardboard box, and where the second part if the packaging insert is arranged between a second frame member of the roof window and a secondary side of the cardboard box.
A packed roof window according to claim 7, where at least some of the projections of the packaging inserts project into recesses in the roof window, under projecting parts of the roof window, or over projecting parts of the roof window.
A method for packing a roof window comprising:
- Providing a cardboard box,

- Arranging the roof window in the cardboard box,

- Providing a plurality of packaging inserts, each made from folded cardboard and comprising a base section (10) having a length direction (L) and a height direction (H) extending perpendicular to a length direction, where the base section comprises two longitudinal edges (103) extending along the length direction and two end edges (104) extending between the longitudinal edges, where the base section comprises a fold line (F) extending along the height direction and separating a first part (A) of the packaging insert from a second part (B) of the packaging insert, where each of a first projection (11, 111, 121) on the first part and a second projection (12, 121, 122) on the second part projects from the base section in a width direction (W) extending perpendicular to a length direction and to the height direction, where the first projection and the second projection are located in continuation of each other in the length direction and at a distance from each of the longitudinal edges of the base section, where the first projection comprises a first projection engagement element (13a, 13b), and where the second projection comprises a second projection engagement element (13a, 13b),

- Folding each packaging insert along the fold line such that the first part extends perpendicular to the second part and such that the first projection engagement element engages with the second projection engagement element, and

- Arranging the folded packaging inserts at corners of the roof window.
A method according to claim 9, further comprising:
Arranging one or more un-folded packaging inserts along outer sides of the roof window.