EDGE STRIP AND METHOD FOR ITS MANUFACTURING

Description

[0001] The present invention relates to an edge strip for furniture comprising a base body with a bottom surface that can be placed against a piece of furniture and a top surface facing away from the bottom surface, wherein the top surface has at least one transition section sloping down towards an edge of the base body.

[0002] Furthermore, the invention relates to a method for manufacturing an edge strip according to the invention.

[0003] Edge trims are known from the prior art that have a base body with a transition section sloping down towards one edge of the base body. Such edge trims are typically attached to the narrow sides of furniture panels as a decorative finish. The transition section of the edge trim sloping down towards the edge of the base body creates a more visually appealing transition from the edge trim to the furniture panel than the transition from an edge trim without a sloping transition section.

[0004] WO 2009 / 053016 A1 and EP1990206A2 each describe a generic edge banding where the transition section has a decorative finish, at least in part. The edge banding described in WO 2009 / 053016 A1 is manufactured to the exact thickness of the furniture piece, thus eliminating the need for any material-removing post-processing of the edge banding's narrow side. The decorative finish present in the tapered transition section of the edge banding is intended to create an improved visual appearance. However, manufacturing the edge banding according to WO 2009 / 053016 A1 to the exact thickness of the furniture piece makes it difficult to compensate for thickness variations within the tolerances of furniture components such as furniture panels. Furthermore, precise positioning of the edge banding is challenging.

[0005] Decorative elements can be applied to edge banding in various ways. For example, a decorative element can be applied using printing processes such as digital printing, especially inkjet printing, or gravure printing. A decorative element can also be applied using a printed film or a transfer film. Of the printing methods mentioned, digital printing is the most flexible, as it does not require special printing rollers for every decorative element, nor does it necessitate the separate creation of a film for the decorative element or from which the decorative element is applied.

[0006] While a decor can be applied to edge strips without a sloping transition section using the aforementioned methods, applying a decor to edge strips with a transition section sloping towards an edge of the base body presents greater technical challenges.

[0007] With contact-based printing processes like gravure printing, maintaining contact across the entire surface of the sloping transition section can be challenging. In printing processes using liquid inks, such as gravure or inkjet printing, the ink can bleed in the sloping transition section, resulting in a different appearance of the design there. Furthermore, the design in the transition section can appear uneven because the increasingly vertical surfaces in the transition section come into contact with progressively less ink. A design can also be applied to a sloping transition section using foils. However, this requires an additional process step in which the foil or transfer foil is coated with the design to be transferred before the design is applied to the edge banding.

[0008] Due to the flexibility of digital printing, especially inkjet printing, it would be desirable to be able to use it for applying decorations to edge strips with a transition section that slopes down towards an edge of the base body, whereby the edge strip as a whole has an appealing visual appearance.

[0009] The object of the invention was therefore to provide an edge trim with a transition section sloping down towards an edge of the base body, which is further improved with regard to the application of a decoration. A further object of the invention was to provide an edge trim which is further improved with regard to its optical properties.

[0010] All or some of these tasks are accomplished according to one embodiment of the present invention in an edge strip according to claim 1.

[0011] According to the invention, the transition section is designed to slope down in steps towards an edge of the base body. The transition section has at least two steps, each with a top surface and a side surface.

[0012] The upper surfaces preferably run parallel to or are inclined to the underside of the edge strip, such that the smallest angles of the upper surfaces with respect to the underside average from -45° to 75°, in particular from -45° to 45°. Likewise, the edge surfaces are preferably inclined with respect to the underside such that the smallest angles of the edge surfaces with respect to the underside average from 20° to less than 90°, in particular from 46° to less than 90°, in particular up to 80°.

[0013] The specified angle range applies to each top surface of a step. Furthermore, the specified angle range applies to each edge surface of a step. The top surfaces can all have the same angle within the specified angle range, or they can each have different angles. Similarly, the edge surfaces can all have the same angle within the specified angle range, or they can each have different angles.

[0014] The angles of the surfaces are measured with reference to the uncurved plane between the edges defining the underside of the base body.

[0015] The presence of the transition section ensures a more visually appealing transition from the edge banding to the furniture. Furthermore, it has been recognized that the stepped shape of the transition section allows for greater flexibility in the printing methods used to apply a decorative finish to the edge banding, including the transition section. This also allows for improved printing of the transition section itself. In particular, the bleeding of applied decorative inks is reduced. Moreover, the transition within the section can be made more uniform. This can be achieved, in particular, without the need to tilt the print heads when applying the decorative finish using inkjet printing. This enhances the overall visual appearance of the edge banding.

[0016] The top of the edge strip can also have two transition sections sloping down towards opposite edges of the base body.

[0017] The top surface preferably has not just one or more transition sections. The width of one or more transition sections is 0.1 to 30%, preferably 0.1 to 20%, and most preferably 0.1 to 10%, of the total width of the top surface. The aforementioned percentages refer to an edge trim according to the invention that is fully attached to a piece of furniture and for which all work steps have been carried out, including processing to ensure a flush finish of the edge with the furniture. Before the edge trim is attached, the width of the transition section can preferably be 0.1 to 90%, more preferably 0.1 to 70%, even more preferably 0.1 to 50%, even more preferably 0.1 to 30%, and most preferably 0.1 to 20%, of the total width of the top surface. Furthermore, the top surface of the edge trim outside the transition section is preferably essentially unstepped.

[0018] The edge trim has a base body with an underside that can be attached to a piece of furniture. This underside is preferably attached to a narrow side of a furniture panel. The narrow sides of the furniture panels are preferably formed by sawing. The narrow sides of the furniture panel are preferably essentially flat.

[0019] According to one embodiment of the edge trim according to the invention, the edge trim can also have a pre-tension, particularly across its width. This pre-tension, especially across the width of the edge trim, ensures that an adhesive layer, such as a layer of glue, is concealed by the edge trim after it has been attached to a piece of furniture. Advantageously, the pre-tension of the edge trim across its width is selected such that the edge has a concave shape with a protrusion of 0.3 mm or less, preferably 0.05 to 0.25 mm. The pre-tension described above has proven particularly advantageous for edge trims with a width of up to 50 mm.

[0020] An inclination of the step surfaces relative to the underside has proven advantageous. It is therefore preferably provided that the edge surfaces of the steps are not orthogonal to the underside, as is usual for steps, but rather inclined. This inclination of the edge surfaces of the steps allows them to be more easily decorated using various printing methods.

[0021] The upper surfaces can be parallel to the underside or they can be inclined. If the smallest angles of the upper surfaces relative to the underside are 0°, meaning the upper surfaces are parallel to the underside, then the upper surfaces can be easily decorated. If the smallest angles of the upper surfaces relative to the underside are greater than 0° and up to 75°, especially up to 45°, then they can also be decorated. At the same time, steeper transition sections can be achieved. If the smallest angles of the upper surfaces relative to the underside are less than 0° and up to -45°, then they can also be decorated. At the same time, a pattern of decoration across multiple steps can be avoided.Preferably, the upper surfaces are inclined relative to the underside such that the smallest angles of the upper surfaces relative to the underside average from 10° to 45° or from -10° to -45°.

[0022] In the following, various embodiments of the edge strip according to the invention and of the method according to the invention for producing the edge strip according to the invention are described, which are also the subject of the dependent claims.

[0023] The upper surfaces of the steps are preferably oriented independently of one another such that the smallest angles of the upper surfaces with respect to the underside average from -45° to 75°, in particular up to 45°. Furthermore, the edge surfaces of the steps are preferably oriented independently of one another such that the smallest angles of the edge surfaces with respect to the underside average from 20° to less than 90°, in particular from 46° to less than 90°, in particular up to 80°.

[0024] It is conceivable that the top and edge surfaces of the steps are straight, particularly without any change in angle relative to the underside. It is also conceivable that the respective surface of the steps is designed such that individual sections of the surface of a step have different angles relative to the underside, while the surface of the step, on average, lies within the aforementioned angle ranges. Sections of the surface can also be arranged with angles outside the aforementioned ranges relative to the underside. For example, a top surface could have a section that lies in the range of 0° to 45° relative to the underside, and another section that lies in the range of -1° to -45° relative to the underside. In this way, for example, a cupped structure of the steps can be achieved. The same applies to the edge surfaces.Preferably, the upper and side surfaces of the steps are straight.

[0025] The steps of the transition section can have a jagged shape. The steps of the transition section can also have a corrugated shape. Steps with a corrugated shape preferably have a crest. Between two successive steps with a corrugated shape, there is preferably a trough. For successive steps with a corrugated shape, the smallest angles of the steps with a corrugated shape with respect to the underside are preferably measured from the line connecting the highest point of the crest to the lowest point of the trough, for example, the secant through these two points. In particular, for the step height and step width, the edge surface and the top surface of a step with a corrugated shape can be defined accordingly by the planes that each contain these connecting lines. It is clear to those skilled in the art that not just any planes containing the respective connecting lines are suitable for this purpose.Rather, the corresponding plane preferably contains several connecting lines of the same step with a corrugated shape along the length of the edge strip. The upper surfaces are preferably those surfaces that exhibit the smallest angles to the underside. Steps of the transition section with a corrugated shape can therefore be considered, in particular, as steps that have bulges. For steps with a corrugated shape, the connecting lines, for example, the secants, and thus the smallest angles, can be determined, in particular, in microscopic images of cross-sections of an edge strip. The lowest point of a corrugation trough is preferably the point where two successive steps with a corrugated shape touch. The highest point of a corrugation crest of a step with a corrugated shape is preferably the point that is at the greatest distance perpendicular to the connecting line between the lowest points of the two adjacent corrugation troughs.

[0026] It is also conceivable that one or more of the steps have a jagged shape and one or more of the steps have a wavy shape. If a wavy step follows a jagged step, or vice versa, the smallest angles of the wavy step with respect to its underside are preferably measured from the line connecting the highest point of the wave crest to the transition point between the wavy step and the jagged step. The above applies accordingly to the edge and top surfaces of the wavy steps. In this case, the highest point of the wave crest of the wavy step is preferably the point that is furthest away perpendicular to the line connecting the two adjacent transition points between the wavy step and the jagged steps.

[0027] For example, steps with a wavy shape can occur when the material, during the production of an edge trim with steps with a jagged shape, assumes a wavy shape after shaping when it cools below its Vicat softening temperature.

[0028] The transition section of the edge strip advantageously has at least two steps, each with a top surface and an edge surface. Preferably, the transition section has at least five steps, more preferably at least twenty steps, more preferably at least fifty steps, more preferably at least eighty steps, and most preferably at least one hundred steps, each with a top surface and an edge surface. A higher number of steps allows for a smoother profile of the transition section.

[0029] The first stage of the transition section of the edge strip according to the invention preferably begins at the edge of the edge strip. The last stage of the transition section of the edge strip according to the invention preferably ends at the non-sloping section of the top surface of the edge strip according to the invention. The last stage can also have only a top surface, which is inclined, in particular, at an angle of 10° to 45° to the underside.

[0030] The edge surfaces of the steps of the transition section of the edge strip have, in particular, a length and a width. The lengths of the edge surfaces of the steps of the transition section are, in particular, determined by the length of the edge strip. Preferably, the lengths of the edge surfaces of the transition section are identical. The widths of the edge surfaces can be the same or different. Preferably, the widths of the edge surfaces of the transition section are identical.

[0031] The upper surfaces of the steps of the transition section of the edge strip have, in particular, a length and a width. The lengths of the upper surfaces of the steps of the transition section are, in particular, determined by the length of the edge strip. Preferably, the lengths of the upper surfaces of the transition section are identical. The widths of the upper surfaces can be the same or different. Preferably, the upper surface of the first step has a greater width than the following step and / or steps.

[0032] Differences in the widths of the edge surfaces and the top surfaces depend primarily on the desired profile of the transition section. For straight profiles such as a chamfer, it can be advantageous if the edge surfaces of the steps and the top surfaces of the steps following the first step have the same width. Conversely, for a curved profile of the transition section, it can be advantageous if the widths of the edge surfaces of the steps and the widths of the top surfaces of the steps following the first step are not identical.

[0033] Particularly preferably, in the edge strip according to the invention, the upper surface of the first step extends to the edge of the base body, wherein the length of the upper surfaces of the steps is identical and determined by the length of the edge strip, and wherein the upper surface of the first step has a greater width than the upper surface of the subsequent step and / or steps. It is preferred if the upper surface of the first step does not run parallel to the underside of the edge strip, but is inclined with respect to the underside such that the smallest angle of the upper surface of the first step with respect to the underside averages between 10° and 45°. Particularly preferably, the first step forms a nose-shaped projection.

[0034] If the first step has a greater width than the subsequent step(s), particularly by forming a nose-shaped projection, it can protrude beyond the narrow side of a piece of furniture, even if the opposite edge of the edge trim is flush with the edge of the furniture's narrow side. The protruding part of the projection can be removed in a subsequent material removal step, advantageously leaving the majority of the edge trim unprocessed. The protrusion can be cut off, in particular, when joining the edge trim to the furniture panel. This removal can be achieved by mechanical processing such as milling or cutting, preferably with a scraper. Alternatively, the protrusion can be removed by melting, for example, using a laser, hot air, or microwaves.Melting off the excess material is particularly useful for edge trims that include a functional layer. This preserves the majority of the decorative element, especially in the transition area. Therefore, the appearance of the edge trim's edge remains largely unchanged thanks to the nose-shaped projection.

[0035] The greater width of the first stage of the edge trim also offers the advantage that thickness tolerances of the furniture pieces, especially the furniture panels to which it is applied, can be effectively concealed. This also makes it easier to attach the edge trim according to the invention flush with the furniture piece. An edge trim with two transition sections on opposite edges of the base body can be easily adapted to both the top and bottom of the furniture panel. This allows for greater tolerances when attaching the edge trim to the furniture panel.

[0036] Preferably, the width of the top surface of the first step is at least twice, and in particular at least three times, greater than the width of the top surface of the subsequent step and / or steps. Advantageously, the width of the top surface of the first step is 0.1 to 30 mm, preferably 0.1 to 15 mm, more preferably 0.1 to 10 mm, more preferably 0.1 to 5 mm, even more preferably 0.25 to 4 mm, and most preferably 0.3 to 3 mm. Such widths represent a good compromise between an attractive appearance of the edge after application and removal of the excess, and material consumption. In particular, from a width of 0.1 to 5 mm, mechanical finishing is easier because the edge strip is more stable.

[0037] The width of the upper surface of the stage following the first stage and / or the stages following the first stage is preferably from 0.01 to 1 mm, more preferably from 0.01 to 0.5 mm, and particularly preferably from 0.01 to 0.2 mm.

[0038] Furthermore, the base body of the edge trim according to the invention can have a thickness of 0.01 to 3 mm, preferably 0.05 to 1 mm, and more preferably 0.05 to 0.3 mm, at the transition from the upper surface of the first step to the edge surface of the first step. Preferably, the first step of the transition section thus has a small thickness. The first step, or the nose-shaped projection of the edge trim, is therefore thin. If the protruding part of the projection of the edge trim is now removed in a subsequent material removal step, only a very narrow area without decoration is created in the transition section. This also means that the majority of the decoration, particularly in the transition section, is retained. Thus, due to the nose-shaped projection, the appearance of the edge of the edge trim can be essentially preserved. This improves the visual impression of the edge trim on the piece of furniture.

[0039] Preferably, the transition section of the edge trim according to the invention, in particular the upper surfaces and the edge surfaces, has a roughness Rz, measured according to DIN EN ISO 4287, in particular DIN EN ISO 4287:2010-07, of 1 to 10 µm, preferably of 3 to 8 µm or of 4 to 7 µm. This reduces the bleeding of printed inks. Furthermore, it improves the adhesion of printed decorations. Additionally, it creates an aesthetically pleasing visual impression, in particular a so-called smooth-matte appearance.

[0040] The base body of the edge trim according to the invention can have various widths. Preferably, the base body has a width of 9 to 150 mm, more preferably 9 to 100 mm, more preferably 9 to 85 mm, and most preferably 16 to 60 mm. Edge trims with a base body of one of the aforementioned widths can be attached to standard furniture panels.

[0041] The base body of the edge trim according to the invention can be made from various materials. Preferably, the base body of the edge trim according to the invention comprises or consists of at least one material that includes a plastic. More preferably, the base body comprises at least one plastic. The plastic is preferably selected from the group consisting of acrylonitrile butadiene styrene copolymer, polyethylene, cross-linked polyethylene (PE-X), polypropylene, polyamide, polyvinyl chloride, polycarbonate, styrene butadiene, polyethylene terephthalate, polymethyl methacrylate, wood-plastic composite (WPC), and mixtures thereof. For wood-plastic composite, compositions containing polypropylene and 50 to 90 wt.% wood fibers and / or wood flour, based on the total weight of the composition, are particularly suitable. These plastics have proven to be well suited for the production of the edge trim according to the invention.

[0042] The base body of the edge trim according to the invention can be single-layered or multi-layered, in particular two- or three-layered. The base body can comprise several, in particular two or three, layers. The layers can contain the same or different materials, preferably different materials. Multi-layered base bodies can be obtained by co-extrusion. For example, the base body can have an upper and a lower layer that have different colors. Preferably, the lower layer is darker than the upper layer. The upper layer can, in particular, be a decorative base. Furthermore, the base body can have an upper, a middle, and a lower layer, wherein the lower layer comprises the underside of the base body and wherein adhesion to a piece of furniture is achieved via the lower layer. The lower layer can, in particular, be a functional layer.A suitable functional layer is one that allows the edge banding to be attached to a furniture panel, particularly by means of a material bond, such as a fused-to-metal layer or a hot-melt adhesive layer. The top layer can be a decorative base. The middle layer can be a layer that provides stability to the edge banding. Preferably, the bottom layer, which comprises the underside of the base body, has a thickness of 0.05 to 3 mm, more preferably 0.1 to 1.5 mm, even more preferably 0.1 to 1 mm, even more preferably 0.1 to 0.5 mm, and most preferably 0.1 to 0.4 mm.

[0043] The top surface of the base body of the edge trim according to the invention can have a decorative finish. The decorative finish can cover the top surface of the base body, excluding the transition section. Preferably, the top surface of the base body, excluding the transition section, is fully or partially covered by the decorative finish.

[0044] The decorative finish can cover the top surface of the base body only in the transition section. Preferably, the top surface of the base body in the transition section is completely covered by the decorative finish. Furthermore, the decorative finish can cover the top surface of the base body including the transition section. Preferably, the top surface of the base body including the transition section is covered by the decorative finish. Particularly preferably, the top surface of the base body including the transition section is completely covered by the decorative finish. The decorative finish on the top surface of the base body in the transition section can differ from the decorative finish on the top surface of the rest of the base body. This can, for example, create an end-grain effect. Preferably, the decorative finish on the top surface of the base body, including the transition section, can be the same. This allows for precise adjustment of the visual appearance of the edge trim.Furthermore, this allows the edge trim to be visually adapted to different pieces of furniture.

[0045] The decoration can be applied to the edge trim according to the invention in various ways. For example, the decoration can be applied by gravure printing, in particular indirect gravure printing, by screen printing, by flexographic printing, by dipping processes, in particular cubic printing, by digital printing, in particular inkjet printing, by applying a printed film, or by means of a transfer film. Preferably, the decoration is printed. More preferably, the decoration is applied by digital printing. Particularly preferred is the decoration applied by means of a non-contact printing process, in particular by inkjet printing.

[0046] Before applying the decoration, a primer can be applied to the top surface of the base body. Applying a primer can be helpful when the decoration is applied using printing inks, particularly gravure, screen printing, flexographic printing, digital printing, or inkjet printing. A primer allows for better control of the ink flow. A primer can be applied to the top surface of the base body only in the transition area. Alternatively, a primer can be applied to the top surface of the base body excluding the transition area. A primer can also be applied to the top surface of the base body, including the transition area. The application location of the primer depends primarily on where the decoration is to be applied. Preferably, the primer is applied to the area of ​​the top surface of the base body where the decoration is to be applied.

[0047] The edge trim according to the invention can also have a structure. The structure can have a depth of up to 400 µm, preferably from 1 to 300 µm, more preferably from 10 to 200 µm, and even more preferably from 15 to 100 µm. The top surface of the base body can have a structure only in the transition section. Likewise, the top surface of the base body can have a structure up to and including the transition section. Furthermore, the top surface of the base body, including the transition section, can have a structure. The structure on the top surface of the base body in the transition section can differ from the structure on the top surface of the rest of the base body. Likewise, the structure on the top surface of the base body, including the transition section, can be the same. The structure can be formed by raised areas and / or depressions. Raised areas can, in particular, be applied by means of a textured coating.Indentations can be embossed. Alternatively, indentations can also be created using a laser.

[0048] Furthermore, the edge trim according to the invention can be glossy. For example, the top surface of the base body can have a glossy finish only in the transition section. Similarly, the top surface can have a glossy finish except for the transition section. Alternatively, the top surface of the base body, including the transition section, can have a glossy finish. The glossy finish on the top surface of the base body in the transition section can differ from the glossy finish on the top surface of the rest of the base body. Preferably, the glossy finish on the top surface of the base body, including the transition section, can be the same. Instead of a glossy finish, the edge trim can also be matte. The above statements regarding a glossy edge trim apply accordingly to a matte edge trim. The edge trim according to the invention can advantageously have all levels of gloss, in particular from matte to high gloss.Preferably, the edge trim can have the gloss levels in the previously described variations with respect to uniformity on the top surface of the base body.

[0049] The base body of the edge strip according to the invention can also have at least one stepped recess transversely to the longitudinal direction. This stepped recess can be produced, for example, by embossing, machining, laser cutting, or with a media jet, such as a water jet. The stepped recess preferably has a stepped profile, particularly on both sides of the stepped recess. Preferably, the at least one stepped recess has the same stepped profile as a stepped groove with a stepped profile on both sides described herein in connection with the second alternative of the method according to the invention, but in the transverse direction of the base body. Several stepped recesses in the base body are also conceivable. These can, in particular, have a certain distance from one another, for example, 60 cm or more.Such stepped recesses can be used to create a visually appealing design, especially at the corners of furniture panels.

[0050] The edge trim can also have an additional stepped edge at each end of the base body, independently of each other, in the longitudinal direction. The same principles apply to the shape of the stepped edge as described for the transition section. The stepped edge can improve the visual appearance at the corners of a piece of furniture based on the same principle as explained for the transition section.

[0051] The present invention further provides a method for manufacturing the edge strip according to the invention, in which the base body of the edge strip, comprising a bottom and a top with a transition section, is formed from at least one material.

[0052] An edge strip according to the invention can be produced using the method according to the invention. Accordingly, the following applies to the base body of the edge strip, in particular to the underside, the top side, the transition section, the step shape of the transition section, the upper surface of the first step, the upper surfaces of the step(s) following the first step, the edge surfaces and the base body, as well as to the at least one material, as stated above for the edge strip according to the invention.

[0053] The method according to the invention preferably comprises an extrusion step, in particular a coextrusion step. The base body can be directly extruded or coextruded. Furthermore, a precursor, for example a strip, an edge band, or a base body precursor, can also be extruded or coextruded. The base body of the edge band can further comprise one or more additional materials, preferably one or more additional plastics, particularly if the method includes a coextrusion step. For example, the base body or the precursor, such as the strip or the edge band, can have a decorative base. This is advantageously applied during the production of the edge band, in particular by coextrusion as the top layer of the base body or the precursor. This ensures color uniformity on the top surface, including in the transition section.Furthermore, a functional layer and / or a color layer can be co-extruded on the underside of the base body or the precursor. The same applies to the functional layer as described for the functional layer of the edge strip according to the invention. It is also conceivable that different materials are co-extruded section by section in a single co-extrusion step. For example, the transition section can be co-extruded in a different material than the rest of the edge strip. The same applies to a precursor of the base body.

[0054] In the process according to the invention, the base body can be manufactured in various ways. For example, the base body can be formed directly by profile extrusion. Alternatively, a strip or edge band can first be extruded and then processed in various ways. Finally, the base body can also be formed by injection molding. The formed base body can form the edge strip according to the invention, in particular an undecorated edge strip. Additionally, a decoration and / or a texture and / or a coating can be applied, especially to the top surface. Preferably, at least one decoration is applied. Some alternative embodiments of the process according to the invention are described below by way of example.

[0055] Experts are familiar with various methods for creating differences in a decorative or varnished surface, for example, differences in the decorative element at the transition point to the rest of the surface. For instance, when applying a decorative or varnish using inkjet printing, multiple printheads can be used. If a decorative or varnish is applied using gravure or flexographic printing, a different visual appearance at the transition point to the rest of the surface can be achieved by using rubber rollers of varying hardness.

[0056] According to a first preferred alternative of the inventive method, the base body is formed by profile extrusion. The base body is preferably formed from the melt. According to this alternative, the base body comprising the transition section is formed directly.

[0057] According to the first alternative of the method according to the invention, the base body, particularly on its upper surface, can be covered with a decoration. The decoration can be applied to the base body, for example, by gravure printing, particularly indirect gravure printing, by flexographic printing, by dipping printing, particularly cubic printing, by digital printing, particularly inkjet printing, by applying a printed film, or by means of a transfer film. Preferably, the decoration is printed. Preferably, the base body, particularly on its upper surface, is printed with a decoration by digital printing. The preceding statements regarding the similarity or difference of the decoration in the transition section and on the remaining upper surface of the base body of the edge strip according to the invention apply accordingly to the method according to the invention.

[0058] A decorative element can be applied using one or more printheads. The printhead(s) can be tilted to improve printing of the transition area. Tilting just a few of the printheads is sufficient.

[0059] In the first preferred embodiment of the method according to the invention, the base body, particularly on its upper surface, can be provided with a structure. A structure can be embossed into the base body, particularly on its upper surface, especially using an embossing roller. Furthermore, a structure can also be applied using a structuring foil or a steel strip, or by means of a laser or by mechanical ablation. Alternatively or additionally, in the first embodiment of the method according to the invention, the base body can also be provided with a structure by applying a textured coating to the base body. In this way, raised structures can be obtained in particular. Alternatively, raised structures can also be applied using a foil. This can advantageously be done when a decorative element is applied to the base body using a transfer foil.Furthermore, a raised structure can also be applied using a 3D printer. The preceding statements regarding the similarity or difference of the structure in the transition section and on the remaining top surface of the base body of the edge strip according to the invention apply accordingly to the edge strip of the method according to the invention.

[0060] Furthermore, in the first preferred alternative of the method according to the invention, the gloss and / or matte finish of the edge strip can also be adjusted. This allows for the production of glossy or matte edge strips. Gloss can be achieved, in particular, by applying a gloss lacquer to the edge strip. The preceding statements regarding the uniformity or difference of gloss in the transition section and on the upper surface of the remaining base body of the edge strip according to the invention apply accordingly to the edge strip produced according to the method of the invention.

[0061] According to a second preferred alternative of the inventive method, the method preferably comprises the steps a. Producing, in particular by extrusion or co-extrusion, a strip having a thickness, a longitudinal direction, a top surface and a bottom surface; b. Introducing, in particular by embossing, at least one stepped groove into the top surface of the strip, thereby obtaining a grooved strip; c. Splitting, in particular by cutting or tearing, the grooved strip in the longitudinal direction, thereby forming at least one base body. where The step groove has a step groove depth and a step-shaped cross-section, which has at least two steps on at least one side of the step groove, each with a top surface and a side surface per step, wherein preferably the top surfaces are oriented independently of each other with respect to the bottom surface such that the smallest angles of the top surfaces with respect to the bottom surface are on average from -45° to 45° and wherein preferably the side surfaces are inclined independently of each other with respect to the bottom surface such that the smallest angles of the side surfaces with respect to the bottom surface are on average from 46° to less than 90°, in particular up to 80° and wherein the step groove depth is at least 70%, preferably at least 80%, of the thickness of the strip.

[0062] The creation of the at least one stepped groove can be achieved, for example, by milling or by embossing. Preferably, the at least one stepped groove is embossed.

[0063] Basically, the second alternative of the inventive method has the advantage that several edge strips can be produced in one operation.

[0064] The strip can be produced by extrusion. It is also conceivable to produce the strip by coextrusion. If the strip is produced by coextrusion, a decorative base layer, for example, can be coextruded on the top side. On the underside, a functional layer and / or a color layer, for example, can be coextruded. The same applies to the functional layer as described for the functional layer of the edge strip according to the invention.

[0065] Preferably, the stepped groove or grooves are introduced into the strip in such a way that the grooved strip has a thickness of 3 mm or less at the lowest point of the stepped groove(s), preferably from 1 µm to 1 mm, more preferably from 10 µm to 500 µm, and particularly preferably from 50 to 100 µm.

[0066] When the stepped groove is embossed, the strip is advantageously above its Vicat softening temperature during the embossing process. Preferably, the strip is in a melt state, particularly a polymer melt, during embossing. Melts, especially polymer melts, have the advantage of being more easily plastically deformable than solid objects. Polymer melts, in particular, have the advantage of retaining shape changes such as embossing well, in addition to their good plastic deformability. Preferably, the grooved strip is cooled during or immediately after embossing, more preferably below the Vicat softening temperature of the strip material. This allows the embossed structure to be effectively frozen.

[0067] The Vicat softening temperature is preferably determined according to DIN EN ISO 306:2014-03, method B50 (force of 50 N, heating rate of 50 K / h).

[0068] Preferably, in the second alternative of the method according to the invention, at least one straight groove is additionally introduced into the strip, wherein the straight groove has a groove depth of at least 70%, preferably at least 80%, of the strip thickness and a straight profile. Preferably, the straight groove runs substantially parallel to the stepped groove. The introduction of the at least one straight groove can be carried out, for example, by milling or by embossing. Preferably, the at least one straight groove is embossed.

[0069] Preferably, the straight groove or grooves are introduced into the strip such that the grooved strip has a thickness of 3 mm or less at the lowest point of the straight groove(s), preferably from 1 µm to 1 mm, more preferably from 10 µm to 500 µm, and particularly preferably from 50 to 100 µm.

[0070] The step groove depth and the straight groove depth can be selected independently of each other. Preferably, however, the step groove depth and the straight groove depth both have the same value.

[0071] The distance between a stepped groove and an adjacent straight groove is preferably selected to correspond to the width of the edge strip according to the invention. In the second alternative of the method according to the invention, the straight groove and the stepped groove preferably have a distance of 9 to 150 mm, more preferably 9 to 100 mm, even more preferably 9 to 85 mm, and most preferably 16 to 60 mm between them.

[0072] As explained above, according to the second alternative of the method according to the invention, several edge strips can be produced in a single operation. For example, a stepped groove can have the stepped profile on both sides of the groove. Furthermore, at least 2, at least 5, at least 10, or at least 15 stepped grooves can be incorporated into the strip. Advantageously, several straight grooves, in particular at least 2, at least 6, at least 11, or at least 16 straight grooves, can also be incorporated into the strip.

[0073] If more than one stepped groove and one straight groove are incorporated, straight and stepped grooves preferably alternate across the width of the strip, with one of the aforementioned spacings occurring independently between each straight and stepped groove. These spacings can vary. This allows edgebands with an identical visual appearance and different widths to be produced in a single operation. This also allows edgebands with an identical visual appearance to be produced for furniture panels of varying widths in a single operation.

[0074] The grooved strip can be separated, for example, by cutting or tearing. Preferably, the separation takes place at the deepest step(s) of the stepped groove(s), particularly along the line with the greatest step groove depth, and / or at the straight groove(s), particularly along the line with the greatest straight groove depth. The cutting can be carried out with a cutting device, for example, a blade, a rotary shear, a hot wire, or a laser. More than one cutting device can be used.

[0075] According to the second preferred alternative of the inventive method, the stepped cross-section of the step groove has at least two steps on at least one side of the step groove, each with a top surface and an edge surface. Preferably, the stepped cross-section of the step groove has at least five steps, in particular at least ten steps, more preferably at least twenty steps, further preferably at least 50 steps, more preferably at least 80 steps, and most preferably at least 100 steps, each with a top surface and an edge surface. The stepped cross-section of the step groove can also have at least five, at least ten, at least twenty, at least 50, at least 80, or at least 100 steps on each side of the step groove.If the stepped cross-section of the groove has steps on both sides, several edge strips can be produced in one operation with virtually no material loss, especially if the strip has the width of two edge strips. In this case, no straight grooves need to be incorporated into the strip.

[0076] The edge surfaces of the steps of the step groove in the second preferred alternative of the method according to the invention have, in particular, a length and a width. What has been said regarding the lengths and widths of the edge surfaces of the steps of the edge strip according to the invention applies accordingly to the edge surfaces of the steps of the step groove.

[0077] The upper surfaces of the steps of the step groove in the second preferred alternative of the method according to the invention have, in particular, a length and a width. What has been said regarding the lengths of the upper surfaces of the steps of the edge strip according to the invention applies accordingly to the upper surfaces of the steps of the step groove. In particular, what has been said regarding the width of the upper surface of the first step of the edge strip according to the invention applies accordingly to the width of the upper surface of the deepest step. In particular, the deepest step of the step groove corresponds to the first step of the edge strip according to the invention.

[0078] According to the second alternative of the inventive method, a decoration can be applied in a further step. To achieve a more visually appealing appearance, a decoration can be applied to the strip or to the grooved strip. Preferably, a decoration is applied to the grooved strip. The decoration can be applied by various methods. For example, the decoration can be applied by gravure printing, in particular indirect gravure printing, by screen printing, by flexographic printing, by dipping processes, in particular cubic printing, by digital printing, in particular inkjet printing, by applying a printed film, or by means of a transfer film. Preferably, the decoration is printed. More preferably, the decoration is applied by digital printing. Particularly preferably, the decoration is applied by means of a non-contact printing process, in particular by inkjet printing.The decoration is applied to the base body, the strip, or the grooved strip, in each case particularly to the top surface, such that what has been said above regarding the similarity or difference of the decoration in the transition section and on the top surface of the remaining base body of the edge strip according to the invention applies accordingly to the edge strips produced according to the second alternative of the method according to the invention. Although the decoration is preferably applied to the strip or the grooved strip, it is also possible to apply the decoration to the edge profile.

[0079] According to the second preferred alternative of the inventive method, an edge strip with a structure can also be produced. An edge strip with a structure can be obtained by embossing, for example, by stamping, the structure into the strip or the grooved strip. If the stepped groove(s) and optionally the straight groove(s) are embossed, the embossing of the structure can, in particular, be carried out simultaneously with the stamping of the stepped groove(s) and optionally the straight groove(s). Furthermore, a structure can also be produced with a structuring foil or a steel strip, or by means of a laser, or by mechanical ablation. Alternatively or additionally, an edge strip with a structure can also be obtained by providing the grooved strip or the shaped base body with a textured coating. In this way, raised structures, in particular, can be obtained.Alternatively, raised structures can also be applied using a film. This is advantageously achieved when a decorative element is applied to the strip or grooved strip using a transfer film. The structure is applied to the base body, the strip, or the grooved strip, particularly to the top surface, in such a way that what has been said above regarding the similarity or difference of the structure in the transition section and on the top surface of the remaining base body of the edge strip according to the invention applies accordingly to the edge strips produced according to the second alternative of the method according to the invention.

[0080] Furthermore, in the second preferred alternative of the method according to the invention, the gloss of the edge strip can also be adjusted. This allows for the production of glossy or matte edge strips. Gloss can be achieved, in particular, by applying a gloss lacquer to the base body. Gloss can also be achieved by applying a gloss lacquer to the strip or the grooved strip. The gloss is applied to the base body, the strip, or the grooved strip, in each case particularly to the top surface, in such a way that what has been said above regarding the uniformity or difference of gloss in the transition section and on the top surface of the remaining base body of the edge strip according to the invention applies accordingly to the edge strips produced according to the second alternative of the method according to the invention.

[0081] According to a third preferred alternative of the inventive method, edge strips according to the invention can also be obtained by first extruding or co-extruding an edge strip that has no transition section. The edge strip preferably has the width of the base body. A transition section can then be obtained by machining, in particular by milling, the edge strip in order to form a base body.

[0082] As an alternative to machining, particularly milling, of the edgeband to form a base body, the edgeband can also be thermally treated using a laser. This thermal treatment with a laser can then be used to form a base body with a transition section.

[0083] As a further alternative to machining, particularly milling, of the edgeband to form a base body, the edgeband can also be treated with a media jet, particularly a water jet. This treatment with the media jet, particularly a water jet, can create a transition section.

[0084] The same principles apply to the application of a decoration and / or a structure and / or a gloss to the base body formed according to the third preferred alternative of the inventive method as have been stated for the application of a decoration and / or a structure to the edge profile according to the first or second alternative of the inventive method. Preferably, a decoration and / or a structure and / or a gloss is applied to the base body according to the third preferred alternative. When applying a decoration and / or a structure and / or a gloss to the edge band, which does not yet have a transition section, these can be removed, particularly in the area of ​​the transition section.

[0085] According to a fourth alternative of the inventive method, the base body is formed by injection molding. The tool used for injection molding can be designed such that the base body is provided with a structure during the injection molding process. In this alternative of the inventive method, the base body is formed directly. The base body can form the edge trim, or it can subsequently be provided with a decoration, a structure, and / or a gloss finish to form the edge trim. Furthermore, a decorative film can also be inserted into the injection mold, which is then back-injected. This allows an edge trim with a decoration to be obtained directly during injection molding. The above statements regarding decoration, structure, and gloss apply accordingly to the first, second, and third embodiments of the inventive method. Injection molding is particularly suitable for the production of very small quantities.A structure on the top surface can also be created directly in the injection mold during injection molding.

[0086] In the method according to the invention, at least one stepped recess can also be incorporated into the base body or into the edge strip. Preferably, the at least one stepped recess is incorporated into the base body before a decoration and / or a structure and / or gloss is applied.

[0087] Preferably, the at least one stepped recess has the same step profile as a stepped groove described herein in connection with the second alternative of the method according to the invention, but is oriented in the transverse direction. The at least one stepped recess can be produced by embossing, machining, laser cutting, or with a media jet, for example, a water jet. The at least one stepped recess can also be produced directly during the production of the edge strip by injection molding. Preferably, the at least one stepped recess is introduced into the base body at regular intervals, for example, every 60 cm or more. However, it is also conceivable that the stepped recess is introduced into the base body when the edge strip is cut to length to fit the piece of furniture.In this case, a decorative element can also be applied to the base body only after the edge trim has been attached to a furniture panel.

[0088] A stepped finish at the ends in the longitudinal direction of the base body can be achieved, for example, during the production of the base body or the edge strip using injection molding.

[0089] Furthermore, the invention also provides an embossing roller with which grooved strips, base bodies and / or edge strips can be produced in an embossing device with a preset roller gap according to the inventive method, comprising a roller core with a roller surface and at least one raised rib structure extending on the roller surface for embossing at least one indentation into a strip, wherein the rib structure has a rib height and a stepped cross-section transverse to the circumferential direction of the roller core, which has at least two steps on at least one side of the rib structure, each with a top surface and a side surface per step, wherein preferably the top surfaces are oriented independently of one another with respect to the roller surface such that the smallest angles of the top surfaces with respect to the roller surface are on average from -45° to 75°.in particular from -45° to 45°, and wherein preferably the edge surfaces are inclined independently of one another with respect to the roll surface such that the smallest angles of the edge surfaces with respect to the roll surface average from 20° to less than 90°, in particular from 46° to less than 90°, in particular up to 80°, and wherein the height of the roll gap is measured from the roll surface and the rib height is at least 70% of the height of the roll gap.

[0090] The rib height can also be at least 80% of the roll gap height. Advantageously, the rib height is selected such that a workpiece embossed with the roll, for example, a grooved strip, has a thickness of 3 mm or less at the deepest indentation, preferably from 1 µm to 1 mm, more preferably from 10 µm to 500 µm, and particularly preferably from 50 to 100 µm. A embossing device, for example, a knife collar, which is advantageously arranged centrally on the rib structure in the circumferential direction, can assist in this process. This facilitates the separation of the grooved strips produced with the embossing roll.

[0091] The same applies to the upper surface of the first stage of the rib structure with a stepped cross-section of the embossing roller according to the invention as to the upper surface of the first stage of the edge strip according to the invention.

[0092] The same applies to the upper surfaces of the step(s) of the rib structure with step-shaped cross-section of the embossing roller according to the invention as to the step(s) of the edge strip according to the invention following the first step.

[0093] The same applies to the edge surfaces of the step(s) of the rib structure with step-shaped cross-section of the embossing roller according to the invention as to the edge surfaces of the edge strip according to the invention.

[0094] The ribbed structure with a stepped cross-section can have a stepped cross-section on one side or on both sides. The stepped cross-section can be identical on both sides or different on each side.

[0095] The embossing roller can further comprise one or more additional rib structures having a substantially straight or stepped cross-section. The embossing roller can be designed such that the rib structure(s) with a stepped cross-section and, optionally, the rib structure(s) with a straight cross-section are fixedly attached to the roller. Edge strips of a fixed width can be produced with such an embossing roller. Similarly, edge strips with two transition sections arranged on opposite sides can be produced by arranging adjacent rib structures with a stepped cross-section on the embossing roller.

[0096] It is also conceivable that embossing segments with different rib structures, featuring stepped and, if necessary, straight cross-sections, are applied, particularly pushed onto, a carrier roller, together forming the outer layer of the embossing roller. In addition to the embossing segments, spacers can also be applied to the carrier roller. This allows the width of the edge strip(s) to be adjusted.

[0097] The embossing segments can be applied, for example, by sliding ring segments onto a carrier roller.

[0098] Additionally, the embossing roller can have embossing elements with which a structure can be embossed.

[0099] There are now numerous possibilities for designing and further developing the edge trim and the method according to the invention. In this regard, reference is made to the description of exemplary embodiments in conjunction with the drawings. The drawings show: Figs. 1a to 1e show schematic side views of various embodiments of the edge strip according to the invention with a transition section, wherein in each embodiment of the edge strip the upper surface of the first step is wider than the upper surface of the subsequent step(s), Fig. 2 shows a schematic representation of the edge strip according to the invention. Fig. 1a in three-dimensional view, Figs. 3a to 3c a schematic representation of an edge strip according to the invention on a piece of furniture immediately after the edge strip has been attached to the piece of furniture ( Fig. 3a ) and immediately after removing the protruding part of the first stage ( Fig. 3b) as well as an increase in the in Fig. 3a circled area ( Fig. 3c), Fig. 4 a schematic representation of the production of an edge strip according to the invention according to the first alternative of the method according to the invention by means of profile extrusion, Fig. 5 a schematic representation of the production of an edge strip according to the invention according to the second alternative of the method according to the invention by means of embossing, Figs. 6a and b schematic representations of the production of an edge strip according to the invention by means of injection molding in two different cross-sections of the injection mold, wherein the edge strip has a stepped end at each of its ends in the longitudinal direction, Fig. 7 a schematic representation of an embossing roller according to the invention, which has a knife collar arranged centrally on the rib structure in the circumferential direction, Figs. 8a to 8c show a schematic representation of an edge strip according to the invention on a piece of furniture immediately after the edge strip has been attached to the piece of furniture ( Fig. 8a) and immediately after removing the protruding part of the first stage ( Fig. 8b ) as well as an increase in the in Fig. 8a circled area ( Fig. 8c The edge trim in Figs. 8a to 8c The transition section has a rounded profile and not a slanted profile; Figures 9a to 9c show a schematic representation of an edge strip according to the invention on a piece of furniture immediately after the edge strip has been attached to the piece of furniture ( Fig. 9a ) and immediately after removing the protruding part of the first stage ( Fig. 9b ) as well as an increase in the in Fig. 9a circled area ( Fig. 9c The edge trim in Figs. 9a to 9c The transition section has a rounded profile, not a slanted one. The edge trim also features steps with a wavy shape.

[0100] The angles of the surfaces given below are specified with reference to the uncurved plane between the edges defining the bottom surface.

[0101] In the Figures 1a to 1e and 2 Exemplary preferred embodiments of edge strips 1 and 1' are shown in side view and of edge strip 1 in three-dimensional representation, in which the upper surface of the first step is wider than the upper surface of the subsequent step(s). Figures 3a to 3c show the preferred embodiment of the edge strip 1 of the Figures 1a to 1e and 2 , in which the upper surface of the first step is also wider than the upper surface of the subsequent steps, but which has a larger number of steps than the edge strip in the Figures 1a to 1e and 2 and which is attached to a piece of furniture. Figures 4 , 5 and 6 show various embodiments of the method according to the invention. Figure 7 shows an embossing roller according to the invention. Figures 8a to 8c show a variant of the edge strip Figures 3a to 3cwith rounded transition section 5. The Figures 9a to 9c show a variant of the edge trim of Figures 8a to 8c , in which the steps have a wavy shape. In the other figures, the steps have a jagged shape.

[0102] The following section describes the exemplary embodiments of the edge strip 1, 1' according to the Figures 1a to 3c as well as 8a to 9c explained.

[0103] The edge strips 1, 1' of the Figures 1a to 3c Figures 8a to 9c have in common that they comprise a basic body 2 with a bottom surface 3 and a top surface 4 facing away from the bottom surface 3. The edge strips 1, 1' have a concave shape with a bulge of 0.15 mm across their width.

[0104] The upper surface 4 also has at least one transition section 5 sloping down towards an edge of the base body 3. This is shown in the Figures 1a, 1c , 1d, 2 , 3a, 3b, 3c and 8a to 9cshown for the edge strip 1. However, it is also conceivable that the top surface 4 has two transition sections 5 sloping down towards opposite edges of the base body 3, as shown in Figure 1b shown for the edge trim 1'.

[0105] The edge strips 1, 1' of the Figures 1a to 3c Items 8a to 9c comprise a plastic. Suitable plastics include acrylonitrile butadiene styrene copolymer, polyethylene, cross-linked polyethylene (PE-X), polypropylene, polyamide, polyvinyl chloride, polycarbonate, styrene butadiene, polyethylene terephthalate, polymethyl methacrylate, wood-plastic composite (WPC), or mixtures thereof.

[0106] The top side 4 of the edge strips 1, 1' in the Figures 1a to 3c Sections 8a to 9c, including transition section 5, are fully covered with a decorative finish. This finish is digitally printed and uniform across the entire surface 4 of the edge trim, including transition section 5.

[0107] As in the Figures 1a to 1e and 2 As can be seen, the transition section 5 slopes down in steps to the edge of the base body 2, with the transition section 5 having several steps, in particular a first step with a top surface 6a and a side surface 7, and at least a second step with a top surface 6 and a side surface 7. However, it is also conceivable that the transition section 5 comprises more than two steps, as shown in the Figures 3a to 3c as in the Figures 8a to 9c depicted. In Figures 9a to 9c The steps with a wavy shape are represented in the form of a circular segment. The length of the circular segment of the steps with a wavy shape is shown in the Figures 9a to 9c They can be the same length. However, they can also be of different lengths.

[0108] The transition section ends in the Figures 1a, 1b, 1c , 1d, 2 , 3a to 3c and 8a to 8c with a border surface 7. However, the transition section can also be as in Figure 1e shown ending with a top surface 6. The transition section can also end with a step with a wavy shape, as shown in the Figures 9a to 9c shown.

[0109] The upper surface 6a of the first step is in the edge strips 1, 1' in the Figures 1a to 3a , 3c , 8a and 8c more than three times wider than the upper surfaces 6 of the subsequent steps. However, it is also conceivable that the upper surface 6a of the first step is the same width as the upper surface(s) of the subsequent step(s).

[0110] In the Figures 9a and 9c The inclinations of the upper surfaces 6 and the edge surfaces 7 of the steps with a wavy shape are determined by the connecting lines between the highest points of the wave crests 51 and the lowest points of the wave troughs 52. Figure 9c Only one wave crest 51 and one wave trough 52 are labeled as examples. However, it is understood that in Figure 9cSeveral wave crests 51 and wave troughs 52 are shown. In the Figures 9a and 9c The upper surface 6a of the first step in the edge strip 1 is more than three times wider than the upper surfaces 6 of the subsequent steps. However, it is also conceivable that the upper surface 6a of the first step is the same width as the upper surface(s) of the subsequent step(s).

[0111] The edge strips 1, 1' in the Figures 1a to 3a , 3c , 8a, 8c , 9a and 9c Furthermore, they are thin at the transition from the upper surface 6a of the first stage to the edge surface 7 of the first stage. In particular, they have a thickness of 0.05 to 0.35 mm. As can be seen from the Figures 3a to 3c and 8a to 9cAs can be seen, manufacturing-related differences in the thickness of the piece of furniture to which the edge strip 1 is attached can be easily compensated for using an edge strip 1, 1' in which the upper surface 6a is wider than the upper surfaces 6 of the subsequent steps. It is particularly advantageous that the edge strip 1 can be fitted flush in the Figures 3a , 8a and 9a Only the thin first layer 6a needs to be removed. This is shown in the Figures 3c , 8c and 9c clearly, the respective enlargements of the in the Figure 3a , 8aor the circled areas shown in 9a. In the case of the edge strip 1', which has two transition sections 5 sloping towards opposite edges of the base body 3, two thin first steps must be removed for a flush fit. This creates only a narrow section without decoration in the transition section 5, so the visual appearance of the edge strips 1, 1' does not change significantly. Furthermore, this ensures a virtually seamless transition from the edge strips 1, 1' to the furniture. The edge strip 1' can be fitted very precisely flush on both the top and bottom surfaces of the furniture.

[0112] Furthermore, the upper surfaces 6 and the edge surfaces 7 of the steps following the first step exhibit in the Figures 3a and 3bthe same width. As a result, edge strip 1 has a chamfer in the transition section 5. Edge strip 1' accordingly has two chamfers. By varying the widths of the top surfaces 6 and the edge surfaces 7 in the transition section 5 of edge strips 1 and 1', differently shaped, in particular rounded, transition sections 5 can also be achieved.

[0113] An edge strip 1 with a rounded transition section 5 on a furniture panel is in the Figures 8a to 8c shown. The transition section 5 from Figure 8a is in Figure 8c Shown enlarged. In transition section 5 of the Figures 8a to 8cThe upper surfaces 6 following the first step have partially different widths. Furthermore, the upper surfaces 6, 6a and the edge surfaces 7 have different inclinations. In this way, the rounded transition section 5 can be realized. The edge surfaces 7 are inclined such that the smallest angles of the edge surfaces 7 with respect to the underside attached to the furniture panel average between 46° and less than 90°. The upper surfaces 6, 6a are in the Figures 8a to 8c inclined with respect to the underside such that the smallest angles of the upper surface 6, 6a with respect to the underside 3 are on average greater than 0° and less than 45°. In contrast to Figure 8a shows Figure 8b the edge strip 1 on the furniture panel after removing the protruding part of the first step.

[0114] In the Figures 9a to 9c is a variant of edge trim 1 from the Figures 8a to 8cwith a rounded transition section 5 on a furniture panel, wherein the steps of the transition section 5 have a wavy shape. The steps with a wavy shape follow one another. Each step with a wavy shape has a wave crest 51, which is Figure 9c This is shown as an example of a stage. Between successive stages lies a wave trough 52, which is in Figure 9c An example of a step is shown. The lowest point of a wave trough 52 is preferably the point where two successive steps with a wavy shape touch. In the Figures 9a to 9c The steps are depicted with a wavy shape resembling circular segments. The lowest point of a wave trough is 52 in Figure 9cThis is preferably the point where two circular segments touch. As described above, the smallest angles of the steps with a wavy shape are preferably measured with respect to the underside, starting from the connecting lines from the wave crests 51 to the lowest points of the wave troughs 52.

[0115] The upper surfaces 6, 6a are in the Figures 1a, 1b , 1e, 2 , 3a, 3b and 3c The upper surfaces 6 and 6a are inclined with respect to the underside such that the smallest angles of the upper surfaces 6 and 6a with respect to the underside 3 are, on average, greater than 0° and less than 45°. All upper surfaces 6 exhibit the same angle. By increasing the inclination of the upper surfaces 6 and 6a, the number of steps in the transition section 5 can be reduced. Figure 1cThe upper surfaces 6 and 6a exhibit different angles with respect to the lower surface 3. The angle of the upper surface 6 of the second stage lies in a range of 10° to 45°, and the angle of the upper surface 6 of the third stage lies in a range of -10° to -45°. Figure 1d The angle of the upper surface 6 of the second stage changes, but on average lies within a range of 5° to 45°. In this way, a cell structure can be created that retains a printed decoration well.

[0116] The edge surfaces 7 are inclined relative to the underside 3 such that the smallest angles of the edge surfaces 7 relative to the underside 3 average between 46° and less than 90°, in particular up to 80°. This inclination of the edge surfaces 7 makes it easier to print them with a design using digital printing processes, especially inkjet printing.

[0117] The upper surfaces 6, 6a and the edge surfaces 7 exhibit in the Figures 1a to 3c and 8a to 8c Furthermore, it has a roughness of 10 µm. This creates a smooth, matte appearance for the edge trim. In the Figures 9a to 9c The steps with their wavy shape have a roughness of 10 µm. This creates a smooth, matte impression of this edge trim.

[0118] In the Figures 3a to 3c and the Figures 8a to 9c The underside 3 of the edge strip 1 also has a layer that is a different color, in particular darker, than the color of the base body 2. This results in a small color difference between the processed first stage and the decoration printed on the edge strip 1. This can also be achieved with a multi-layered, in particular a two-layered, edge strip 1, in which the layer containing the underside 3 is the darkest. The underside 3 also has a melt layer.

[0119] The Figures 4 ,5 and 6 Figure 1 shows various embodiments of the inventive method for producing the edge strip 1 according to the invention. In all embodiments, an edge strip 1 is produced from a material consisting of a plastic. The plastics mentioned above are suitable as possible plastics.

[0120] All embodiments have in common that the base body 2 is molded from a plastic material. The base body 2 is formed in the form of an endless strip. The molded base body 2 has a bottom surface 3 that can be placed against a piece of furniture, a top surface 4 facing away from the bottom surface 3, and a transition section 5 that slopes down towards an edge of the base body 2.

[0121] The transition section 5 of the shaped base body 2 slopes down in steps to the edge of the base body 2 and has, for example, at least two steps, each with a top surface and a side surface per step, wherein the top surfaces are inclined independently of each other with respect to the bottom surface 3 such that the smallest angles of the top surfaces with respect to the bottom surface 3 average 20° and wherein the side surfaces are inclined independently of each other with respect to the bottom surface 3 such that the smallest angles of the side surfaces with respect to the bottom surface 3 average 75°.

[0122] For the possible configurations of the base body 2, in particular the transition section 5 and the upper surface of the first stage, reference is made to the explanations regarding the edge strip 1 according to the invention above.

[0123] In Figure 4The base body 2 is now formed directly by profile extrusion with extruder 10. An advantage of this design is that edge strips 1 can be produced cost-effectively in small quantities.

[0124] This basic body 2 is then provided with a decoration 8. In Figure 4 The decorative element 8 is applied by digital printing using a digital printhead 11, preferably an inkjet printhead. The digital printhead 11 can also be tilted to improve printing on the transition section 5 of the base body 2. Multiple printheads 11 with different tilts can also be used to achieve an optimal visual appearance of the edge trim 1. The decorative element 8 is uniform on the top surface 4 of the base body 2, including the transition section 5, and covers the entire surface of the top surface 4 of the base body 2 of the edge trim 1.

[0125] If desired, the base body 2 can be provided with a texture on its upper surface 4, either in addition to or instead of the decorative element 8. For example, a texture can be embossed into the upper surface 4 of the base body 2 in the form of indentations using an embossing roller. Raised textures can be applied to the upper surface 4 of the base body 2 using textured varnish. A printhead, such as a digital printhead, can be used to apply the textured varnish. It is also conceivable to apply raised textures by applying a textured film to the upper surface 4 of the base body 2. Preferably, the base body 2 is additionally provided with a texture that is uniform across the upper surface 4 of the base body, including the edge strip 1 and the transition section 5.

[0126] The edge strip 1 is in Figure 4The cutting device 12 cuts the material at regular intervals perpendicular to the extrusion direction. This allows, for example, edge strips of uniform length to be obtained. The edge strip 1 is rolled up for storage and transport (not shown).

[0127] In the Figure 5a In the alternative shown of the method according to the invention, a strip 100, having a thickness, a longitudinal direction L, an upper surface 104 and a lower surface 103, is first produced from an extruder 110. A stepped groove 105 is then embossed into the upper surface 104 of the strip 100 in an embossing device 20. For this purpose, the embossing device 20 is equipped with rollers 21 and 21'. Roller 21 is an embossing roller that embosses the stepped groove 105 into the strip 100. This results in a grooved strip 101. The embossing device 20 can, for example, be configured as a calender.

[0128] The strip 100 is extruded as a polymer melt, the temperature of which, at least on its upper surface 104, is above its Vicat softening temperature, measured according to DIN EN ISO 306:2014-03, method B50. The embossing roller 21 is cooled during this process. This cools the grooved strip 101, allowing structures with very good dimensional accuracy to be embossed into the strip 100. Advantageously, the grooved strip 101 wraps around the embossing roller 21 (not shown).

[0129] The stepped groove 105, which is embossed into the strip 100, has a stepped groove depth and a stepped cross-section. In Figure 5aThe cross-section of the stepped groove 105 has two steps on both sides, each with a top surface 106, 106a and a side surface 107, but is shown only as two bevels. However, it is conceivable that the cross-section of the stepped groove 105 has steps only on one side. Furthermore, more than one, in particular two, five, ten, fifteen or more, stepped grooves 105 can be embossed into the strip 100. In the embossing device, a structure can also be embossed into the strip 100 in addition to the stepped groove 105 and optional straight groove(s) (not shown).

[0130] A cross-section of the grooved band 101 along the plane Vb is shown in Figure 5b depicted. In Figure 5bThe cross-section of the stepped groove 105 has two steps on each side. The top surface 106a of the deepest impressed step is 3 mm wide. The top surface 106 of the subsequent step has a width of 0.05 mm. The top surface 106a is therefore wider than the top surface 106. The top surfaces 106a and 106 each have an average angle of 20° with respect to the bottom surface 103. The edge surfaces 107 have an angle of 75° with respect to the bottom surface 103. However, it is conceivable that the cross-section has more steps, for example at least five, at least ten, or at least twenty.

[0131] The stepped groove 105, which is embossed into the strip 100, has a thickness of 0.1 mm at its thinnest point.

[0132] In addition to the stepped groove 105, one or more, in particular two, five, ten, fifteen or more, straight grooves can also be embossed into the band 100 or into the grooved band 101 (not shown).

[0133] In Figure 5a A decorative finish is applied to the top surface of the grooved strip 101 using the printhead 11. The printhead 11 is a digital printhead, specifically an inkjet printhead. The decorative finish is applied uniformly across the surface 104 of the grooved strip 101. It is also conceivable that a textured varnish and / or a gloss varnish could be applied using additional printheads (not shown). Several printheads 11 can be used. These, or some of them, can also be inclined.

[0134] The grooved volume 101 will be in Figure 5a then separated along the longitudinal direction L, resulting in two edge strips 1 with shaped base bodies 2. For this purpose, in Figure 5aThe cutting device 13 is used. The grooved strip 101 is cut along the stepped groove 105 along the line with the greatest groove depth. Alternatively, instead of cutting, the grooved strip 101 can also be torn along the stepped groove 105 in the longitudinal direction L. If the grooved strip 101 has several stepped grooves 105 and optionally one or more straight grooves, the grooved strip 101 is cut multiple times along its longitudinal direction in the cutting device 13. The cuts are made along the straight grooves as well as along the stepped grooves 105.

[0135] In Figure 5a The shaped edge strips 1 are then cut at regular intervals in the cutting device 12, transverse to the longitudinal direction L. The edge strips 1 are subsequently rolled up for storage and transport (not shown).

[0136] Advantages of the design according to Figure 5aThe advantage of the method according to the invention is that several edge strips 1 can be formed in a single operation. The production of the edge strips 1 is carried out with maximum material utilization.

[0137] According to a further embodiment of the inventive method, not shown, an endless edge band can also be extruded, which is approximately the same as band 100 of the embodiment according to Figure 5a This corresponds to, but is narrower and has approximately the width of an edge strip 1. An edge strip 1 with a transition section 5 can then be obtained by machining the edge strip, for example by milling, by thermal treatment with a laser, or with a media jet, in particular a water jet. Alternatively, a transition section 5 can also be embossed into the edge strip. For the application of a decoration 8 and the further steps, refer to the descriptions of the design according to Figure 4 referred.

[0138] The Figures 6a and 6b Figure 1 shows a further embodiment of the inventive method, in which the base body 2, comprising a bottom surface 3, a top surface 4, and a transition section 5, is formed by injection molding. The Figure 6a The transition section 5 shown has two steps with a nose-shaped projection. The same applies to transition section 5 as to transition section 5 in Figure 4 Said as stated.

[0139] In the Figures 6a and 6b In the illustrated alternative of the method according to the invention, a plastic is injected into the tool 30, consisting of the partial forms 31 and 32, via one or more injection nozzle(s) 33. After the plastic has cooled sufficiently in the mold, the resulting base body 2 is ejected from the tool 30. Subsequently, a decoration and, if desired, a gloss finish are applied as described above. Figure 4 described (not shown). This results in edge strip 1.

[0140] Figure 6a This shows a cross-section through the injection mold 30, wherein the cutting plane is such that the longitudinal direction of the base body 2 is perpendicular to the cutting plane. Figure 6b shows a different cross-section through the same injection mold 30, where the cutting plane is perpendicular to the cutting plane of Figure 6a and simultaneously runs perpendicular to the surface 4 of the base body 2. In Figure 6b It can also be seen that the upper surface 4 of the base body 2 slopes down in a stepped manner towards the edge at the ends in the longitudinal direction of the base body 2, thereby forming the stepped termination 9. The shape of the stepped termination 9 is identical to the shape of the transition section 5.

[0141] The embossing roller 21, which is inserted into the embossing device 20, can be designed in various ways. The common feature of the different designs is that they have a raised ribbed structure running along the roller surface.The rib structure has a rib height and a stepped cross-section, which on at least one side of the rib structure has at least two steps, each with a top surface and a side surface per step. The top surfaces are oriented independently of one another with respect to the roller surface such that the smallest angles of the top surfaces with respect to the roller surface average from -45° to 75°, in particular from -45° to 45°. The side surfaces are inclined independently of one another with respect to the roller surface such that the smallest angles of the side surfaces with respect to the roller surface average from 20° to less than 90°, in particular from 46° to less than 90°, in particular up to 80°. The number of raised rib structures with a stepped cross-section corresponds to the number of step grooves to be embossed in a strip.

[0142] To enable the embossing of straight grooves into a strip, the embossing roller can additionally feature raised rib structures with a straight cross-section. The number of rib structures with a straight cross-section corresponds to the number of straight grooves to be embossed into the strip.

[0143] Figure 7 Figure 21 shows an example of an embossing roller 21, which additionally has a knife collar 24 and embossing elements 25. The knife collar 24 is arranged centrally in the circumferential direction on the rib structure 22. Due to the knife collar 24, the rib structure 22 has a total height of at least 90% of the roller gap. Figure 7The rib height is selected such that a workpiece embossed with the roller, for example a strip, has a thickness of 50 µm at the deepest indentation. The knife collar 24 is not required, however. The rib structure 22 of the embossing roller 21" has a stepped cross-section 23 on both sides, which is Figure 7 but is only marked on one side. The stepped cross-section of the rib structure 22 is identical on both sides and corresponds to the stepped cross-section 23. In Figure 7 The stepped ribbed structure of the embossing roller 21" has, by way of example, two steps. However, it is also conceivable that the stepped ribbed structure of the embossing roller 21" has more steps. Furthermore, the embossing roller can be configured as described above for Figure 5a described as being designed.

[0144] The in Figure 7The embossing roller 21 shown also has embossing elements 25. With the embossing elements 25, a structure can be embossed into a workpiece, for example a strip, in the same operation in which a stepped groove is also embossed.

Claims

1. Edge strip (1, 1') for pieces of furniture, comprising a main body (2) having a lower face (3) that can be placed against a piece of furniture and an upper face (4) facing away from the lower face (3), wherein the upper face (4) has at least one transition portion (5) sloping toward an edge of the main body (2), wherein the transition portion (5) slopes in a step-like manner toward the edge of the main body (2), wherein the transition portion (5) has at least two steps with one upper surface (6, 6a) and one edge surface (7) per step, wherein the upper surfaces (6, 6a) are oriented, independently of one another, with respect to the lower face (3) such that the smallest angles of the upper surfaces (6, 6a) with respect to the lower face (3) are each on average from -45° to 75°, in particular from -45° to 45°, and wherein the edge surfaces (7) are inclined, independently of one another, with respect to the lower face (3) such that the smallest angles of the edge surfaces (7) with respect to the lower face(3) are each on average from 20° to less than 90°, in particular from 46° to less than 90°, in particular up to 80°, characterized in that the width of the transition portion (5) is 0.1 to 30% of the total width of the upper face (4).

2. Edge strip (1, 1') according to claim 1, characterized in that the transition portion (5) has at least five steps, in particular at least twenty steps or at least fifty steps or at least eighty steps or at least one hundred steps.

3. Edge strip (1, 1') according to either claim 1 or claim 2, characterized in that the main body (2) has a width of 9 to 150 mm, in particular of 9 to 100 mm or of 9 to 85 mm or of 16 to 60 mm.

4. Edge strip (1, 1') according to any of the preceding claims, characterized in that the main body (2) of the edge strip (1, 1') comprises or consists of at least one material which comprises at least one plastics material, wherein the plastics material is selected in particular from the group consisting of acrylonitrile-butadiene-styrene copolymer, polyethylene, cross-linked polyethylene (PE-X), polypropylene, polyamide, polyvinyl chloride, polycarbonate, styrenebutadiene, polyethylene terephthalate, polymethyl methacrylate, wood-plastic composite (WPC) and mixtures thereof.

5. Edge strip (1, 1') according to any of the preceding claims, characterized in that the main body (2) of the edge strip (1, 1') comprises a plurality of, in particular two or three, layers.

6. Edge strip (1, 1') according to claim 5, characterized in that the layers contain different materials and / or the main body (2) is obtainable by coextrusion.

7. Edge strip (1, 1') according to any of the preceding claims, characterized in that the first step of the transition portion (5) begins at the edge of the edge strip (1, 1') and wherein the first step has a greater width than the subsequent step(s), in particular forms a nose-shaped projection.

8. Edge strip (1, 1') according to any of the preceding claims, characterized in that the steps of the transition portion (5) have a wavy shape.

9. Edge strip (1, 1') according to any of the preceding claims, characterized in that the steps of the transition portion (5) have a jagged shape.

10. Edge strip (1, 1') according to any of the preceding claims, characterized in that the upper surface (6a) of the first step extends to the edge of the main body (2), wherein the length of the upper surfaces (6, 6a) of the steps is identical and is predetermined by the length of the edge strip (1, 1') and wherein the upper surface (6a) of the first step has a greater width than the upper surface (6) of the subsequent step and / or the subsequent steps, in particular in that the width of the upper surface (6a) of the first step is at least twice as great, in particular at least three times as great, as the width of the upper surface (6) of the subsequent step and / or the subsequent steps and in particular is 0.1 to 30 mm or 0.1 to 15 mm or 0.1 to 10 mm or 0.1 to 5 mm or 0.25 to 4 mm or 0.3 to 3 mm and / or the width of the upper surface (6) of the step following the first step and / or the steps following the first step is from 0.01 to 1 mm, in particular from 0.01 to 0.5 mm or from 0.01 to 0.2 mm and / or in that the main body (2) has a thickness of from 0.01 to 3 mm, in particular from 0.05 to 1 mm or from 0.05 to 0.3 mm, at the transition from the upper surface (6a) of the first step to the edge surface (7) of the first step.

11. Method for producing an edge strip (1, 1') according to any of claims 1 to 10, in which the main body (2) comprising a lower face (3) and an upper face (4) with a transition portion (5) is formed from at least one material.

12. Method according to claim 11, characterized in that the method comprises an extrusion step, in particular a coextrusion step, and / or the main body (2) is formed by profile extrusion of the at least one material or the main body (2) is formed by injection molding.

13. Method according to either claim 11 or claim 12, comprising the steps of a. producing, in particular by extrusion or coextrusion, a strip (100) from the at least one material having a thickness, a longitudinal direction (L), an upper surface (104) and a lower surface (103), b. introducing, in particular embossing, at least one stepped groove (105) into the upper surface (104) of the strip (100), whereby a grooved strip (101) is obtained, c. separating, in particular cutting or tearing, the grooved strip (101) in the longitudinal direction (L), whereby at least one main body (2) is formed, wherein the stepped groove (105) has a stepped groove depth and a stepped cross-section, which has at least two steps on at least one side of the stepped groove (105), each with one upper surface (106, 106a) and one edge surface (107) per step, wherein the upper surfaces (106, 106a) are oriented, independently of one another, with respect to the lower face (103) such that the smallest angles of the upper surfaces (106, 106a) with respect to the lower face (103) are each on average from -45° to 75°, in particular from -45° to 45°, and wherein the edge surfaces (107) are inclined, independently of one another, with respect to the lower face (103) such that the smallest angles of the edge surfaces (107) with respect to the lower face (103) are each on average from 20° to less than 90°, in particular from 46° to less than 90°, in particular up to 80°, and wherein the step groove depth is at least 70%, in particular at least 80%, of the thickness of the strip (100).

14. Method according to one of claims 11 to 13, characterized in that at least two, at least five, at least ten or at least fifteen step grooves (105) are introduced into the band (100) and / or in that in the production of the edge strip (1, 1') having steps with a jagged shape, the material takes on a wavy shape after forming when cooling below its Vicat softening temperature in order to produce steps having a wavy shape.

15. Method according to any of claims 11 to 14, characterized in that first, an edge band is extruded, into which a transition portion (5) is incorporated by means of machining, in particular by means of milling, thermal treatment with a laser beam, with a media jet such as a water jet, or by means of embossing, so that a main body (2) is formed.