The invention relates to a method for manufacturing a system configured to receive a panel, for example fa ade system for receiving one or more glass sheets, the system including substantially metal elongated elements and intermediate elongated elements extending between the metal elongated elements.

Systems provided with panels, for example, glass sheets, and with substantially metal (e.g. steel) elements extending parallel to edges of the panels, are known from the prior art.

Prior art methods for manufacturing steel fagade structures involved manufacturing elongated support profiles first, cutting the profiles into sections and manually welding the sections together (e.g. into rectangular or square frame structures). Clearly this was a very labor intensive process, and particularly time consuming is case narrow tolerances had to be met.

Further, as an example, applicant’s international patent apphcation no. WO2010/002258 discloses a system comprising at least a first (strip shaped) element which extends along a first edge of at least one panel, wherein the first element is manufactured from metal, and is of solid design. The system is furthermore provided with at least a further element which extends along a second edge of the at least one panel. In addition, the system is provided with a connection between the first and further element, which connection comprises at least a solid metal, preferably steel), (strip shaped) connecting element. An intermediate, thermally (strip shaped) insulating part extends between the last-mentioned solid metal element and a first element. An advantage of the system is that it can be manufactured from relatively little material and few different components, which is favorable in terms of environmental impact and cost price.

According to W02010/002258 the intermediate (in this case thermally insulating) part can be connected to the neighboring metal (for example, steel) elements by means of a clamping connection. To this end, a first element is provided with one or more clamping recesses and/or grooves, arranged to be engaged by clamping means and/or projections of another system part.

A disadvantage of the system is that when the system is loaded with rainwater, water may end up in the connecting face as a result of capillary action. Under the influence of the water the metal may start to rust at the connection, which gives rise to rust water, with all adverse consequences thereof.

Another disadvantage is that providing clamping recesses in said substantially metal elements is relatively costly, time consuming and hence little efficient.

According to an improvement, WO 2012/064187 discloses coupling an intermediate thermally insulating part to a metal element in a considerably more efficient manner, in particular such that local rust formation and/or rust water formation can be well counteracted. According to the document, that is achieved via connecting means that comprise connecting elements, which connecting elements are each provided with a metal (e.g. steel) connecting flange which by means of a fixing treatment is integrally fixed to a connecting surface of a metal element mentioned. In particular, the insulating parts can be integrally fixed to respective connecting elements by means of clamping fixation, with deformation of those insulating parts.

According to W0’187, in this manner a good coupling between a thermally insulating part and a substantially metal element of the system can be obtained, thereby avoiding the provision of clamping recesses in metal (e.g. steel) elements. The system can be manufactured more rapidly than was possible hitherto, which entails a considerable cost reduction, even utilizing the extra parts (i.e., the connecting elements). According to a relatively compact and yet durable design, the connecting element is a metal (in particular stainless steel) U-profile. An insulating part as mentioned can be coupled, for example, by means of clamping to the U-profile, for example by pressing down the insulating part (partly) into the U-profile. According to W0’187, it is noted that the connecting element may also be configured differently, for example as an H-profile or other profile.

A disadvantage of a known manufacturing method for manufacturing the system is that it is still labor intensive and relatively inefficient. Besides, dimensions of the system can be relatively large, increasing the burden on a manufacturing team to assemble the system in a desired precise manner.

The present invention aims to further improve the manufacturing method and resulting system. In particular, the invention aims to provide a method that can manufacture such a system in a swift, precise, cost-efficient manner.

To this end, according to an aspect of the invention, there is provided a method according to the features of claim 1.

The method preferably includes:

-providing at least one clamp structure which has support surfaces for defining mutual welding positions of an intermediate part and respective two metal elongated elements;

-positioning a first elongated element into the clamp structure when the structure is in a respective opened state;

-positioning an intermediate part into the clamp structure, onto a positioned first elongated element, when the structure is in a respective opened state; -closing at least a first part of the clamp structure for retaining the intermediate part, and preferably also the first elongated element, in a respective welding position, and welding a first metal section of the intermediate part to the first elongated element.

In this way, the system can be manufactured relatively efficiently and precisely, compared to known processes. In particular, the same clamp structure can be configured for mutual positioning (and holding) respective system parts in desired welding positions, allowing a swift and accurate welding process. In a preferred embodiment, one or more welding robots is/are used to carry out each of the welding steps. Also, preferably, continuous welds (providing continuous welding lines) are applied. Alternatively, welding can be carried out manually.

The invention is particularly advantageous for relatively assembly of large and/or complex structures.

According to a preferred embodiment, the method includes providing a base frame of first elongated elements (first). It follows that the method according to the invention preferably includes:

-providing a base frame of first elongated elements;

-providing at least one clamp structure which has support surfaces for defining mutual welding positions of an intermediate part and respective two metal elongated elements;

-positioning a first elongated element of the base frame into the clamp structure when the structure is in a respective opened state;

-positioning an intermediate part into the clamp structure, onto the positioned first elongated element of the base frame, when the structure is in a respective opened state;

-closing at least a first part of the clamp structure for retaining the intermediate part, and preferably also the first elongated element of the base frame, in a respective welding position, and welding a first metal section of the intermediate part to the first elongated element of the base frame.

By providing the base frame first, that frame can be manufactured with high accuracy, e.g. regarding dimensions of a window or fagade that will receive the manufactured system. Thus, narrow tolerances can be met at an early stage of the manufacturing process, wherein the base frame in particular can provide an accurately dimensioned base for the layout of subsequent system elements (i.e. said second and intermediate elements).

For example, according to a further embodiment, the first elongated element can be part of a base frame, for example an angular, rectangular or square frame, for example a frame defining or enclosing a panel receiving opening. For example, the base frame can consist of three or more first strip shaped elements. As follows from the above, onto each of these strip shaped elements, respective intermediate (insulating or metal) parts can be connected, in particular by carrying out the above steps for each of the first strip shaped elements and respective intermediate parts, preferably in/by the same apparatus. The same holds for connecting further (second) strip shaped metal elements, in other to form e.g. a metal (optionally insulating) frame assembly.

In this way, the panel receiving system or facade system can be manufactured swiftly and accurately, e.g. taking into account system mounting dimensions, in a relatively automated manner.

Advantageously the method can include repositioning the base frame of first elements with respect to the clamp structure, to subsequently hold each of its first metal elongated elements and a respective intermediate part and optional second elongated element (so that each section of first metal elongate elements and respective intermediate parts and optional second elongated elements can be connected in respective welding steps).

According to a preferred embodiment, an above-mentioned base frame as such can be made in one piece and has e.g. been in one piece from a single sheet of metal (or steel), thereby improving overall system manufacturability and process efficiency. Laser beam cutting can be applied for cutting out the base frame from the metal or steel sheet, or a different cutting process. Alternatively, the base frame can be made from a plurabty of elongated elements that are joined at their ends (e.g. by welding) to form the base frame.

In a preferred embodiment, the intermediate part is a thermally insulating part. In that case, preferably (in view of weldability), opposite ends of the thermally insulating parts are fixed to additional metal connecting elements, in particular connecting elements that include metal connecting flanges. Thus, the metal connecting element provides a weldable metal section of the intermediate element.

In an alternative embodiment, the intermediate part is a metal (e.g. aluminum or steel) part, wherein an integral section of the part as such provides a weldable metal section.

According to a further preferred embodiment, the method includes:

-positioning the second elongated element into the (same) clamp structure, onto a positioned intermediate part, when the structure is in a respective opened state;

-closing at least a second part of the clamp structure for retaining the second elongated element in a respective welding position; welding a second metal section of the intermediate part to the second elongated element, during which preferably at least the intermediate part is also retained by the clamp structure.

The method preferably includes arranging an array of clamp structures along a longitudinal direction for positioning a first elongated element (of a base frame) thereon. In this way, the first and further system elements can be held together more firmly and also more accurately viewed along said longitudinal direction, in particular allowing improved mutual alignment of the elements. For example, the various clamp structures can be spaced-apart by at least 10 cm and for example by at most 100 cm, for example in the range of about 30 -60 cm.

Further, an aspect of the invention provides an apparatus for manufacturing a system configured to receive a panel, for example fagade system for receiving one or more glass sheets, the system including substantially metal (preferably steel) elongated elements and intermediate elongated elements extending between the metal elongated elements, for example an apparatus configured to be used in a method according to the present invention, wherein the apparatus includes:

-a main support structure, for example a support table or support frame, providing a support surface to support a base frame of first elements;

- at least one clamp structure which has supporting surfaces for defining mutual welding positions of an intermediate part and respective two metal elongated elements; wherein the clamp structure is configured for receiving the intermediate part and respective two metal elongated elements when the structure is in an opened state, wherein the clamp structure includes at least a first part that is configured to be moved to a second, closed, state for retaining the intermediate part, and preferably also a first elongated element of the base frame, in a respective welding position, wherein the apparatus optionally includes a welding device, for example a welding robot, configured to weld a first metal section of the intermediate part to the first elongated element of the base frame.

The apparatus can provide abovementioned advantages.

As follows from the above, in a preferred embodiment, the apparatus is used to weld a plurality of intermediate parts to a plurality of first metal elongated elements, wherein the first metal elongated elements are already integrally connected or made in one piece thereby forming a base frame. It is preferred that the apparatus includes said main support structure, for example a support table or support frame, providing a support surface (preferably a horizontal support surface ), to provide support to the base frame of the first element, e.g. to provide ease of repositioning of system components in-between welding sequence steps.

For example, the base frame (of first elements) can be repositioned several times with respect to the apparatus (i.e. on the main support structure), to subsequently hold each of its first metal elongated elements and a respective intermediate part (using the same clamp structure) so that they can be welded.

Furthermore, advantageously, there is provided a system including at least one panel, for example fa ade system for receiving one or more glass sheets, the system including substantially metal elongated elements and intermediate elongated elements extending between the metal elongated elements, wherein the system has been manufactured by a method according to the invention and/or using an apparatus according to the invention.

Further advantageous embodiments of the invention are described in the dependent claims. Non-limiting examples of the invention will now be explained with reference to the drawings. Therein shows:

Fig. 1 a cross section of an exemplary embodiment of a system known per se;

Fig. 2 a cross-sectional view along line II -II of Fig. 1;

Fig. 3 a cross section of a part of a system according to a non- limitative exemplary further embodiment of the system;

Figure 4 schematically shows a top view of a manufacturing apparatus according to an example of the invention;

Figure 5 is a cross-section over line IV-IV of Fig. 4;

Figure 6 is similar to Fig. 4, showing a first manufacturing step;

Figure 7 is similar to Fig. 5, showing the first manufacturing step in cross-section; Figure 8 is similar to Fig. 7, showing a second manufacturing step in cross-section;

Figure 9 is similar to Fig. 7, showing a third manufacturing step in cross-section;

Figure 10 is similar to Fig. 5, showing a fourth manufacturing step; and

Figures 11A-11H, are similar to Fig. 3, showing alternative arrangements of the elements of the system.

Identical or corresponding features are indicated herein with identical or corresponding reference characters.

Figs. 1, 2 show a first non-limitative exemplary embodiment of a system, described per se in WO 2012/064187, provided with one or more panels P, for instance multiple-glass sheet panel elements P, and with elongated (in this case strip -shaped) profiles or elements 1, 2 which extend along edges of the panels P, parallel to those edges (in particular for holding the panels in position, for instance by exerting a clamping force on the panels P).

In the example, each panel P is a thermal insulation panel which is provided with two parallel glass sheets (“double glazing”). Also, a panel P can for instance comprise only one sheet (for example, of glass) or more than two (for example, three spaced apart parallel glass sheets). In Fig. 1, end faces of neighboring panels P bound a space H. The system PI, P2 shown in Fig. 1 may be positioned in different manners, for example, vertically, horizontally, or at an inclination (with respect to a horizontal plane). The panels PI, P2 can each comprise, for example, a window or door.

As shown in Fig. 1, the system comprises a first element 1 which extends along a first edge of at least one panel P, in this case along two first edges of two neighboring panels P. Thus, the first element 1 covers the edges of these two neighboring panels. Thus, the first element 1 covers the edges of these two neighboring panels (viewed in front view). The first element 1 comprises, for instance, an element 1 extending along outer edges of the panels P. In particular, the first element 1 extends along two longitudinal edges of two panel parts P arranged (at a relatively short distance) with end faces opposite each other, to cover these longitudinal edges.

The first element 1 is of particularly shm design, having a (transversal) width LI, measured in a transverse direction (according to arrow Y) with regard to a respective panel edge (i.e., measured in a direction parallel to the panels P), which is less than approximately 5 cm. Preferably, each first element 1 has a maximum width LI of 4 cm, preferably 3 cm, measured in a direction transverse to the longitudinal edges mentioned.

The present first element 1 has a very simple configuration, and is, for example, of solid metal or steel design, having, for example, a substantially rectangular cross section. The present first element 1 is not provided with any recesses or cavities. The metal mentioned can be simple (non-stainless) steel, or high-alloyed stainless steel, or aluminium.

An outer side of the first element 1 remote from the panels P in this case is parallel to an inner side proximal to these panels P. The element 1 preferably extends parallel to (front) surfaces of the double glazed panels P. The first element 1 can for instance impart a particular stiffness and strength to the system, so that relatively large panels P can be durably held in position. As the drawing further shows, the first element 1 is located wholly outside a panel front plane V (which is parallel to an XY-plane in the present drawing) defined by the panels P (at least, wholly in an area located on a side of that plane V remote from the panels P).

A thickness L2 of the first element 1 can for instance be greater than 1 mm, in particular greater than 2 mm, for instance a thickness in the range of approximately 2 - 15 mm. A ratio between the width LI and thickness L2 of the first element 1, i.e., L1:L2, can for instance be in the range of 10:1 to 2:1, in particular 6:1 to 3:1. Preferably, first thermally insulating means 8 are provided between the first element 1 and the panels P, for instance sealant means or plastic strips 8. The thermally insulating means (which are preferably manufactured from resilient material, for instance rubber, an elastomer or the like), are preferably also designed to form a watertight seal between panel outer sides and an opposite inner side of the first element 1. Preferably, an inner side of the first element 1 is at a relatively short distance L3 from opposite panel outer sides, for instance a distance L3 which is approximately equal to a thickness L2 of this element 1, or a smaller distance.

Further, after assembly, the system is provided with optional elements 2, functioning, for instance, as glazing beads which extend along second edges of the panels P (these second panel edges are parallel to the first edges, and are located at the same oppositely arranged panel end faces as the first edges).

In the embodiment of Figs. 1, 2, each glazing bead element is also of very simple design, and consists in particular of an angle, comprising, in particular, a first flange 2a and a second flange 2b, bent over with respect to the first profile flange. The flanges 2a, 2b have for instance substantially the same dimensions. In the example, the first and second flange 2a, 2b of each glazing bead element 2 mutually include an angle of 90 degrees. In the example, the second flange 2b has an inner side thereof facing the panel P. Preferably, second thermally insulating means 9 are provided between each glazing bead element 2 and an opposite panel side, for instance sealant means or plastic strips 9. These second thermally insulating means (which are preferably also manufactured from resilient material, for instance rubber, an elastomer or the like) can also be designed to form a watertight seal between a panel outer side and an opposite inner side of the glazing bead element 2. A glazing bead element can also be designed differently, and comprise, for instance, a tube, tubular profile, a U-shaped profile, a glazing bead, or the like.

Preferably, each glazing bead element 2 is also manufactured from metal (e.g. steel, which may or may not be stainless steel). Alternatively, a first and/or glazing bead element can be manufactured from, for instance, aluminum, wood or plastic.

According to a non-limitative example, a width L4 of a first flange part 2a (measured in a direction X at right angles to the panels P) can for instance be smaller than 5 cm, and/or for instance be smaller than a thickness L5 of the panels P. In the exemplary embodiment, the flange width L4 is less than half the panel thickness L5. In this manner, a further compactness and slimness of the system can be achieved.

Further, an earlier-mentioned width LI of a first element 1 can for instance be approximately equal to or even less than a panel width L5. Alternatively, the width LI of a first element 1 may be greater than a panel width L5.

The system further comprises metal or steel (which may or may not be stainless steel) carrier elements 3 (i.e. second elements), as well as thermally insulating parts 4 to locally form a thermal separation in the system (at least, between the first element 1 and glazing bead element 2).

Also the carrier element 3 as such (which likewise extends parallel along edges of the panels, and parallel to the first element 1 and glazing bead element 2) is preferably of a particularly simple design. In the example, the carrier element 3 consists of an elongated solid metal connecting element or carrier 3 (for instance, a supporting beam), preferably with a thickness (measured in a direction Y parallel to front face V) that is greater than 1 mm, in particular greater than 2 mm, for instance a thickness in the range of approximately 2-15 mm. The present solid carrier element 3 has no recesses or passages. As follows from the drawing, the carrier element 3 extends at right angles to the first element 1, and reaches between the panels P (i.e., between the end faces thereof). In an alternative embodiment a said carrier element is an elongated tubular profile (instead of a solid profile).

A width of the carrier element 3 (measured in a direction X at right angles with respect to the panels) is preferably at least approximately equal to a thickness L2 of the first system element 1. In the exemplary embodiment, the carrier element has a rectangular cross section; in this example, side surfaces of the carrier element 3 facing away from each other are parallel to each other. The carrier width (measured in the X direction) is for instance approximately equal to or even less than a panel width L5 mentioned.

In this case, the metal carrier element 3 reaches for at least 50% (for instance volume%, mass%, or both, as in this example) opposite (i.e. along) an end face of a panel P, in particular from a glazing bead element 2 in the direction of a first element 1. The carrier element 3 is therefore substantially (at any rate, at least for half of it) in the space H bounded by the end parts of the panels P.

Preferably, the carrier element 3 does not touch the panels P. In this example, the element 3 is indirectly connected to the first element 1 by means of the thermal intermediate piece 4. Side faces of the carrier element 3 are at a distance from opposite end faces of the panels P. The glazing bead elements 2 are connected directly (by the first flanges 2a integrally) to (side surfaces of) the carrier element 3. The connection between the carrier element 3 and the insulation part 4 is preferably completely in the space H (see Fig. 1).

As follows from the Figures, the thermally insulating part 4 is preferably located substantially (for instance for more than 50%, for instance volume%, mass%, or both, as in this example) in the system inner space H. The insulating part 4 is manufactured from, for instance, plastic, rubber, an elastomer, or other suitable, thermally insulating material. The insulating part 4 is designed to substantially prevent heat transfer between the first element 1 and glazing bead element 2 and carrier 3. Further, the insulating part 4 can provide a wind-tight and watertight seal. Preferably, the insulating part 4 does not touch the panels P; in the example, relatively narrow gaps are present between the insulating part 4 and panel end faces. Each insulating part 4 can be manufactured in a particularly advantageous manner simply by means of a plastic extrusion process.

In Figs. 1-2, the thermally insulating part 4 is provided with a first connecting part 4M, to which the carrier 3 is connected, preferably utilizing a suitable (direct, mutual) glue connection. In particular, the first connecting part 4M is provided with a recess in which a part of the carrier 3 is received.

In the embodiment according to Figs. 1-2, the thermally insulating part 4 is provided with a second connecting part 4S, to which the first element 1 is connected, preferably utilizing a suitable glue connection and/or clamping connection. In this system known per se, the second connecting part 4S is provided with a front flap (“glue flap”) 4F in which the first element 1 is fastened (glued).

A particularly advantageous connection (of the insulating part to metal elements 1, 3) according to the present invention is further elucidated hereinafter, with reference to Figs. 3-4, while further a relatively simple embodiment of an insulating part 14 is provided (without glue flap 4F and without glue recess).

The thermally insulating part 4 as such can be designed to be somewhat elastic, for instance resilient, but this is not requisite. The insulating part 4 can for instance be a rigid (i.e. non-elastic) part, for instance a fiber reinforced part 4 (in particular of a part manufactured from insulating material, a fiber reinforced plastic, a composite, or the like). According to a further elaboration, sealant means are provided between the thermally insulating part 4 on one side and the first element 1 and/or the carrier element 3 on the other. According to a further elaboration (not represented), the thermally insulating part 4 can be provided with one or more grooves for receiving sealing means (for instance sealant means), for the purpose of a watertight connection to the first element 1 and/or the carrier element 3.

Fig. 3 shows a further elaboration of a basis part of the system shown in Figs. 1-2, and in particular an extra advantageous elaboration of a coupling of a thermally insulating part 14 to two metal (e.g. steel) elements 1, 3. In particular, Fig. 3 shows a panel receiving assembly 1, 3, 14 for providing a system including at least one panel (for example a fa ade system for receiving one or more glass sheets), having metal elongated elements 1, 3 and a thermally insulating elongated element 14 extending between the metal elongated elements 1, 3. In this case, opposite ends of the thermally insulating parts 14 are fixed to additional metal connecting elements 11, for example connecting elements that include metal connecting flanges 11.

The two metal (e.g. steel) elements can comprise, for example, a first element 1 as mentioned and a carrier element 3 as mentioned. The panels, glazing bead elements, and optional sealing means 8, 9 and optional sealant means are not represented in Fig. 3 for the sake of clarity.

As follows from Fig. 3 additional connecting elements 11 are provided to couple an insulating part 14 to the respective metal elements 1, 3.

The insulating part 14 may be manufactured of the same material as the insulating part 4 shown in Figs. 1-2, and in particular has the same function (namely, substantially preventing heat transfer between the first element 1 and glazing bead element 2 and carrier 3). The insulating part 14 shown in Fig. 3, in a relatively simple embodiment, has a substantially rectangular cross section. The insulating part may also be designed differently, for example with one or more side flaps (for example, distancing side profiles or the like).

Optionally, the insulating part 14 is provided with dedicated coupling sections 14a, 14b facing the metal elements 1, 3, which in this example each have substantially rectangular cross sections. The coupling sections may be shaped differently, for example, with polygonal cross sections other than rectangular, with sidewardly projecting friction- increasing parts, for example, clamping ribs, and/or the hke.

The coupling sections 14a, 14b, after assembly, are engaged by respective elongate connecting elements 11, for example by means of a strong clamping connection and/or via adhesive (glue). As follows from Fig. 3, the insulating part 14 is preferably coupled centrally to an end face longitudinal side of the carrier element 3, utilizing an intermediate connecting element lib. In the example the insulating part 14 is (in this case centrally) coupled to an inner surface of a first element 1 utilizing a respective connecting element 11a. In the exemplary embodiment, the connecting elements 11a, lib have the same shape and the same dimensions, viewed in cross section, but this is not requisite. For example, the present connecting element 11 can be a metal (e.g. steel, preferably stainless steel) connecting profile which consists of a number of parallel profile flanges. The connecting element 11 is in particular provided with an elongate metal connecting flange 12, which is arranged in particular to be fixed to a metal element 1, 3 by means of a thermal treatment, more particularly an energy beam welding treatment.

In this example, the element 11 is of relatively compact design and provided with only one metal connecting flange 12. Alternatively, different metal connecting flanges may be present, for example, two or three, to be fixed on two or three opposite surfaces of a metal element 1, 3. According to a further elaboration, the connecting flange 12 of the metal connecting element 11 has a thickness X3, measured normal to the connecting surface, in the range of about 1-6.5 mm. Other dimensions are also possible.

The metal or metal connecting element 11 can e.g. be provided with a recess 15 to receive at least a part of the intermediate part 14. The recess in this example is bounded by two parallel side flanges 13 of the connecting profile 11. Preferably, a width XI of this recess 15 (i.e., a distance between mutually facing surfaces of the side flanges 13) is slightly smaller than a width X2 of the part of the intermediate part 14 to be received, in order that a firmly clamping coupling can be achieved after insertion of the insulating part 14. However, that is not required. In an other embodiment, the coupling between a metal connecting element 11 and intermediate part 14 is achieved without a clamping connection, for example via a suitable adhesive (glue).

A thickness X4 of each of the side flanges 13 is preferably equal to the thickness X3 of the connecting flange, but that is not requisite.

In a relatively compact design, the connecting element 11 has a width L6, measured in a direction normal to said connecting surface, of less than 5 cm, in particular about 2 cm or less (for example, in the range of 0.5 1 cm).

As follows from the drawing, the present connecting element 11 is a U-profile, which also comprises the two oppositely extending, parallel side flanges 13 to define the recess 15. An alternative connecting profile comprises, for example, an H-profile, which on one side can present three metal connecting flanges to be fixed to three surfaces of a metal element 1,

3, and on the other side a recess to engage the insulating part 14. The connecting element may also be configured in a different manner, for example as a single flat connecting strip. As mentioned, the connecting element 11 is preferably fixed integrally to a connecting surface of a metal element 1, 3 by means of a fixing treatment. According to an extra advantageous, efficient and relatively fast method, the fixing treatment comprises an energy beam welding treatment, preferably laser beam welding, or alternatively electron beam welding. Use of laser beam welding has led to very good results.

More particularly, fixing comprises a welding treatment whereby the connecting flange 12 is fused with the respective connecting surface of a metal element 1, 3 along an uninterrupted, watertight connecting weld. The uninterrupted connecting weld can fuse the flange 12 substantially throughout its length (measured in a direction parallel to near panel longitudinal edges) to a metal element, so that penetration of water via the connection is avoided. Thus, rust issues associated with water penetration (such as formation and spread of rust water) can be counteracted particularly well.

It is noted that in an alternative method, a welding joint can be realized whereby the flange 12 is fixed to a metal element by means of different weld sections.

In the present embodiment, the connecting element 11 can be attached to a respective metal element 1, 3 first, after which the insulating part 14 can e.g. be pressed down with a respective coupling section (14a,

14b) into a clamping recess 15 of the connecting element. The clamping leads in particular to a local deformation of the insulating part 14 (i.e., of the coupling section thereof). In addition, the clamping action can lead to a deformation of the connecting element 11.

In an alternative embodiment, the connecting element 11 can be attached to a respective metal element 1, 3, after which the insulating part 14, is inserted with a respective coupling section (14a, 14b) into a recess 15 of the connecting element, wherein an adhesive (glue) is used to make the connection (i.e. without deformation of the connecting element 11). In yet another embodiment, a or each connecting element 11 is glued to the insulating part 14 first, after which a welding process is carried out to weld the or each connecting element 11 to a respective first and/or second element 1, 3.

Preferably, the insulating part 14 is coupled at least water-tightly to an outer connecting element 11a (associated with a first element 1), or water-tightly sealed thereto, utihzing a sealing means, for example a sealant. Thus penetration of, for example, rainwater and local rust formation can be prevented extra well.

In the following, regarding Figures 4-10, an innovative welding apparatus and method will be described for achieving efficient and accurate manufacture of the resulting assembly of elements 1, 3, 14 (i.e. a ‘panel receiving assembly’ 1, 3, 14).

Figures 4-10 show an apparatus for manufacturing at least part of the system, in particular for interconnecting an elongated (e.g. strip-shaped) first metal element 1, elongated second metal element 3 and intermediate elongated (thermally insulating or metal) element 14. In case the intermediate element 14 is a thermally insulating element it preferably has metal connecting elements 11, providing weldable metal sections, as e.g. in a system shown in Figure 1-3.

As is shown in Figure 6, in an extra advantageous embodiment, the first elongated element 1 (to be welded) is part of a base frame BF, for example an angular, rectangular or square frame. The base frame BF e.g. defines a frame opening O (e.g. a panel receiving opening). In this example, the base frame BF includes a number of first elongated elements 1, la, lb, lc, surrounding a frame opening O. For example the base frame BF can be made (e.g. cut) in one piece from a single sheet of metal (or steel). Alternatively, the base frame BF can be made from a plurality of elongated elements 1, la, lb, lc that are joined via opposite ends (e.g. by welding) to form that frame BF. Advantageously, the apparatus includes at least one clamp structure 50 (see Fig. 5) which provides a number of supporting surfaces Si, S2, S3, S4 for defining mutual welding positions of an afore-mentioned thermally insulating part 14 and respective two metal elongated elements 1, 3 (see e.g. Figures 1-3). In the present embodiment, each supporting surfaces SI, S2, S3, S4 is a flat surface, for providing good support to flat surfaces of the elements 1, 3, 14 during clamping. The clamp structure 50 can e.g. include a non-elastic element or body/section 50q, made in one piece, that is shaped to provide each of the various supporting surfaces SI, S2, S3, S4. Alternatively, the clamp structure 50 include a number of components, joined together to form a support body 50q that provides the various supporting surfaces Si, S2, S3, S4. Also, optionally, the clamp structure 50 can include a modular built support body 50q, composed of various modules that can be interchanged with other modules to allow supporting elements 1, 3, 14 of different shapes and dimensions. The support body 50q (or respective elements forming that body) can be made e.g. of metal, steel or the -like.

As follows from Figure 3 it is preferred that the apparatus has an array of spaced-apart (mutually aligned) clamp structures 50, for the receiving and jointly holding the elongated elements 1, 3, 14. The various clamp structures 50 are preferably spaced-apart by a distance F of at least 10 cm, and for example by at most 100 cm, for example in the range of about 30 -60 cm. In this embodiment, the apparatus includes a main support structure AM, for example a support table or support frame, providing a support surface T (preferably a horizontal support surface T). In this example, the support surface T can provide support to part of the base frame BF (that includes the first element to be welded), see Figures 4 and 6.

The main support structure AM supports or holds the clamp structures 50 in desired positions for receiving and holding the elements 1,

3, 14 during operation. For example, a guide means or guide rail G can be connected to or be part of the main support structure AM, wherein the array of clamp structures 50 is held by the guide means G. Optionally, mutual positions of the clamp structures 50 can be adjusted, for setting desired inter distances, as will be appreciated by the skilled person.

As is shown more particularly in Figures 6-8, the clamp structure 50 is configured for receiving the intermediate part 14 (that can already be provided with the metal elements 11 in case it is a thermally insulating part) and respective two metal elongated elements 1, 3 when the structure is in an opened state.

Preferably, the clamp structure 50 (i.e. its section 50q) provides a first support surface Si for supporting a bottom side of a first metal elongated element 1. Preferably, the first support surface Si is in-line with the main support surface T, or part thereof (as in the drawings), the first support surface Si of the clamp structure and main (frame) support surface T preferably extending in the same horizontal plane.

Also, preferably, the clamp structure 50 (i.e. its section 50q) provides a second support surface S2 for supporting a lateral side of a first metal elongated element 1, the second support surface S2 in particular extending orthogonally with respect to the first support surface Si (in order to accurately support respective opposite orthogonal sides of the first metal element 1 during clamping).

In the present example, the various first support surfaces S 1 of the plurality of clamp structures 50 are aligned with each other. Also, it is preferred that these first support surfaces S 1 extend in the same plane as the support surface T of the main support structure AM, allowing good supporting of a (large) base frame BF containing the first element 1 to be welded.

In the present embodiment, the clamp structure 50 (i.e. its clamp section 50q) has a third support surface S3 for supporting a lateral side of the intermediate part 14 during welding. The third support surface S3 of the clamp structure 50 preferably extends orthogonally with respect to a said first support surface Si of the clamp structure 50, and preferably extends in parallel with the second support surface S2 of the clamp structure.

Furthermore, the present clamp structure 50 includes a fourth support surface S4 for supporting a lateral side of the second elongated element 3 during welding (the fourth support surface S4 in particular being provided by the respective clamp section 50q). As follows from the drawings, in this example, the fourth support surface S4 extends in parallel with the third support surface S3. However, in this example, the third and fourth support surfaces S3, S4 are not aligned to each other (i.e. they do not extend in the same vertical plane), in view of a difference in thickness of the respective elements 14, 3 to be supported. Alternatively, in case the two elements 14, 3 have the same thickness, the third and fourth support surface S3, S4 can extend in the same plane.

In order to firmly position the elongated elements 1, 3, 14 (to be welded) to their respective support surfaces S1-S4, the clamp structure 50 includes a number of movable clamp parts.

In particular, the present clamp structure 50 includes a first clamp unit 50a that is configured to be moved (form an opened state, as in Fig. 5) to a second, closed, state (see Fig. 8) for retaining the intermediate part 14 in a respective welding position, against a respective third supporting surface S3 of the clamp structure 50 (when the intermediate part 14 is positioned onto a placed first element 1, see Fig. 7). In this example, the respective supporting surface S3 is located opposite the first movable part 50a of the clamp structure. In particular, the first clamp unit 50a is configured to be activated to retain the intermediate part 14 during welding. The first clamp unit 50a (being drawn schematically) can e.g. include or be connected to an actuator 51a for setting/adjusting the position the clamp unit 50a, preferably a pneumatic actuator, or e.g. a hydraulic or electric actuator, as will be appreciated by the skilled person. Also, the apparatus can include a control unit U, for example a processor or computer, connected via suitable communication means to the first clamp unit 50a (or respective actuator 51a) for controlling operation of the first clamp unit 50a (e.g. automatically and/or via operator interaction).

Further, the present apparatus includes a second clamp unit 50b that is configured to be activated to retain a first elongated element 1 during welding. The second clamp unit 50b can be configured in the same way as the first clamp unit 50a, and can e.g. include or be connected to an actuator 51b for setting/adjusting the position the clamp unit 50b (preferably a pneumatic actuator, or e.g. a hydraulic or electric actuator, as will be appreciated by the skilled person). Also, the control unit U can be connected via suitable communication means to the second clamp unit 50b (or respective actuator 5 lb) for controlling operation of the first clamp unit 50b (e.g. automatically and/or via operator interaction).

In particular, as is depicted, the clamp structure 50 can also include at least a part 50c, 50d that is configured to be brought to a closed state for retaining the second elongated metal element 3 in a respective welding position (when that element 3 is located onto a positioned intermediate element 14 and against a respective support surface S3). In the present embodiment, this part 50c, 50d of the clamp structure 50 includes both of a third clamp unit 50c that is configured to support a lateral side of a second elongated element 3 to retain the element in its respective welding position, and a fourth clamp unit 50d that is configured to support a top side of the second elongated element 3, the top side being faced away from the intermediate part 14 (during welding), to retain the second elongated element 3 in its respective welding position.

Each of the third and fourth clamp unit 50c, 50d can be configured in the same way as the first clamp unit 50a, and can e.g. include or be connected to an actuator 51c, resp. 5 Id for setting/adjusting the position the clamp unit (preferably a pneumatic actuator, or e.g. a hydraulic or electric actuator, as will be appreciated by the skilled person). Also, the control unit U can be connected via suitable communication means to the third and fourth clamp units 50c, 50d (or respective actuator 51b) for controlling operation of the clamp units (e.g. automatically and/or via operator interaction).

As follows from the drawings, each of the clamp structures 50 is preferably configured to hold the intermediate part 14, and preferably also the first elongated element 1, in a respective welding position, using force closure or form closure.

Further, optionally, a said first clamp unit 50a and optional further clamp units 50b, 50c can be part of a second clamp section 52 that is displaceable with respect to, or removable from, the opposite first clamp section 50q (such displacement being indicated by arrow L in Fig. 5), for temporarily allowing or increasing access to the clamp surfaces Si, S2, S3, S4. As a non limiting example, the first clamp section 50q may include a coupling structure (in this case an opening 53) for coupling to (in this case receiving) part of such a second a second clamp section 52. The skilled person will appreciate that a displaceable or removal coupling between components 50q, 52 of the clamp structure 50 can be achieved in various ways, including e.g. application of bolting means, releasable joining elements and the-like.

Preferably, the apparatus includes at least one welding device 60 (schematically depicted in Fig. 9), for example a welding robot, configured to weld a metal section 11 of the intermediate part 14 to the first elongated element 1. In case of a welding robot, it is preferred that operation of that robot can be controlled by said central control unit U. For example the apparatus can be configured such that the central control unit activates the welding robot to weld the parts 1, 3, 14 together after the clamping units 50a, 50b, 50c, 50d have been brought to respective clamping positions (holding the elongated elements 1, 3, 14 in desired welding positions). During operation, the apparatus can carry out a method efficiently manufacturing a (optionally thermally insulated) metal or steel base assembly of e.g. a window system or fa ade

The method including providing the structure(s) 50 which provide the support surfaces Si, S2, S3, S4 that defining mutual welding positions of an intermediate part 14 and respective two metal elongated elements 1, 3. The method preferably includes providing the base frame BF first, and using the base frame BF as base layout to receive the further system elements (wherein the apparatus can provide swift and firm joining of the elements via respective welding steps).

As is shown in Figure 4, the first elongated element 1 (of the base frame BF) can be positioned into the array of spaced-apart clamp structures 50 (preferably one after the other, i.e. in sequence) when the structures are in respective opened states. For example, the base frame BF containing the first element 1 can be supported onto the surface T of an (optional) main support structure MA, wherein the base frame BF can be (e.g. manually) shifted and optionally lifted towards the support surfaces S1-S4 of the clamp structures 50, to introduce the respective first element 1 therein. Such movement is indicated by arrow K in Figure 4. Optionally, clamp units 50a, 50b, 50c (i.e. a respective second clamp section 52) may be temporarily removed from a respective clamp structure 50, allowing passage of first element 1 of the base frame BF. Such movement of clamp units 50a, 50b,

50c is indicated by an arrow L in Figure 5. After placement of the first element 1, the clamp units 50a, 50b, 50c (i.e. a respective second clamp section 52) can be repositioned again, to the depicted state.

After the first element 1 of the base frame BF has been placed against the respective clamp support surfaces SI, S2, the intermediate part 14 can be positioned into the clamp structure 50, onto the positioned first elongated element 1 ( when the structure is in a respective opened state). Optionally, the (optional) second clamp unit 50b may already be activated to retain the placed first elongated element 1 in the clamp structure, during placement of the intermediate part 14, but that is not required. As is mentioned before, in case of application of an intermediate insulating part 14, opposite ends of that thermally insulating part 14 are fixed to additional metal connecting elements 11, for example connecting elements 11 that include metal connecting flanges 12 (see e.g. Figure 3). Application of such additional metal connecting elements 11 is not required in case the intermediate part 14 is a metal (e.g. steel or aluminium) part (in that case, sections of the metal intermediate part 14 as such provide weldable sections).

Next, the first part 50a of the clamp structure 50 is closed for at least retaining the intermediate part 14 (and preferably also the first elongated element 1), in a respective welding position, which a metal section 11 of the intermediate part 14 being placed onto the first metal element 1.

Moreover, the present example includes positioning a second elongated element 3 into the clamp structure 50, onto the positioned intermediate part 14, when the structure (at least respective third and fourth clamp units 40c, 50d) is in a respective opened state. The second part 50c, 50d of the clamp structure 50 is subsequently closed for retaining the second elongated element 3 in the respective welding position.

The result is shown in Figure 8: therein, the first part 50a, 50b of the clamp structure 50, namely the first clamp unit 50a, has been activated to retain the intermediate part 14 (against the opposite support surface S3), also the second clamp unit 50b has been activated to retain the first elongated element 1 (against the opposite support surface S2).

Besides, the third clamp unit 50c has been activated to support a lateral side of the second elongated element 3, and to retain the element 3 in its respective welding position (i.e. against the opposite support surface S4). Also, in this case, the fourth clamp unit 50d has been activated to supports the top side of the second elongated element 3, and to retain the second elongated element 3 (onto a metal section or metal element 11 of the intermediate part 14).

It follows that when the desired clamping positions have been achieved, a bottom side of the first metal elongated element 1 is positioned onto the first support surface Si of the clamp structure 50, and that a lateral side of the first metal elongated element 1 is positioned against the second support surface S2 of the clamp structure 50. Also, in this example, a lateral side of the intermediate part 14 is positioned against the third support surface S3 of the clamp structure 50.

Preferably, a central control unit U controls the closing of the various clamp sections, providing automatic or semi-automatic operation.

As is shown in Figure 9, once the elements are held in place in the array of clamp structures, the elements can be attached via welding. To this aim, a welding apparatus 60 (optionally a welding robot) is used, to weld the a metal section of intermediate part 14 to the first elongated element 1 and to weld a metal section of the intermediate part 14 to the second elongated element 3. Preferably, at least part of the welding includes making a continuous elongated connecting weld between respective system components 1, 3, 14.

In order to provide a continuous weld along the entire length of the elements, it is preferred that -in case of application of an array of clamp structures 50- one or more of the clamp structures is temporarily repositioned or removed for allowing local welding at a respective clamping position. For example, the various clamp structures 50 of the array of can be repositioned or temporarily removed in a sequence, wherein welding is carried out/continued at the respective clamping positon that has become available by such repositioning/removal, wherein the clamp structure can be placed back and activated for clamping the elements at its respective clamping positon after the local welding has finished. It is preferred that the clamp structures 50 holds the intermediate part 14, and preferably also the first elongated element 1, in a respective welding position, using force closure (e.g. by pneumatic our hydraulic or electric actuator force of a respective clamp actuator 51a), but alternatively form closure can be applied. The same holds for the clamping achieved to the other parts 1, 3 of the assembly 1, 3, 14.

After the elements 1, 3, 14 have been welded together, the elongated elements 1, 3 and intermediate part 14 can be released by opening the clamp structure 50 (i.e. by returning respective clamp parts 50a-50d to the initial state shown in Figure 5). Next, in case of the advantageous processing of a base frame BF, as shown in Figure 10, such a frame BF can be repositioned(indicated by arrows M, N) with respect to the clamp structures 50 to carry out the process on a next first element la (or lb, lc) of that frame, using further intermediate elements 14 and respective second metal elements 3. The top surface T of the main support structure can provide supporting assistance during frame repositioning.

In particular, the base frame BF can be repositioned, wherein the section that includes the elements 1, 3, 14 that have just been welded are removed from the clamp structures 50 and a next first elongated element la (of the base frame BF) is be positioned into the array of spaced-apart clamp structures 50 when the structures are in respective opened states. Next, a respective intermediate part can be positioned into the clamp structure 50, onto the positioned a next first elongated element la ( when the structure is in a respective opened state). The first part 50a of the clamp structure 50 can then be closed for at least retaining the respective intermediate part (and preferably also the first elongated element la), in a respective welding position, which a metal connecting section 11 of the intermediate part being placed onto the first metal element la. Also, another second elongated element can be positioned into the clamp structure 50, onto the positioned intermediate part 14, when the structure (at least respective third and fourth clamp units 40c, 50d) is in a respective opened state. The second part 50c, 50d of the clamp structure 50 is subsequently closed for retaining the second elongated element in the respective welding position. Then, the next first elongated element la (of the base frame BF), respective intermediate part and respective second elongated element can be welded together, after which the elongated elements and intermediate intermediate part can be released by opening the clamp structure 50, and the base frame BF can be repositioned again for to carry out the process on a next first element lb of that frame (until all first elements 1 have been provided with respective intermediate elements 14 and second elements 3).

In this way, a particularly durable assembly 1, 3, 14 for e.g. a window system or fagade can be manufactured efficiency and with high accuracy. This in particular holds in case of relatively long elements to the joined, for example elongated elements 1, 3, 14 having a length of at least 1 meter, in particular at least 2 meter .

It will be clear to the skilled person that the invention is not limited to the exemplary embodiments described. Various modifications are possible within the framework of the invention as set forth in the following claims. In this apphcation, the term “a” can mean, for instance, at least one, for instance, one or more. In this application, the term “solid element” means for instance that this element is not a tubular profile and, for instance, does not in itself enclose a space. In particular, the solid element in itself has no inside surfaces extending opposite to each other (but, for instance, only a continuous outside surface).

Furthermore, a first element preferably has a sohd strip -shaped design, but it can also comprise a hollow profile.

A carrier element, in an alternative embodiment, can comprise a hollow (tubular) profile.

A substantially metal element 1, 3 can consist, for example, of substantially simple non-stainless steel. As is generally known, such steel is an alloy of iron with (typically at most about 2%) carbon. For this reason the steel is sometimes referred to as non-alloyed or low-alloyed steel, and contains, for example, at most 5% of alloy elements excluding carbon.

In addition, a substantially steel element may be manufactured of a high-alloyed steel (with more than 5% alloy elements excluding carbon), in particular stainless steel (which contains, for example, at least 10% of chromium).

Moreover, instead a of steel first element, the first strip shaped element can be made of another alloy, or metal, for example aluminum. The same holds for each second elongated (e.g. strip shaped) element 3.

Also, a said second element or carrier element 3 can be integrally formed with a said glazing bead element 2.

Moreover, as mentioned above, in an embodiment, a base frame BF including a number of first elements 1, la, lb, lc can e.g. be provided with respective intermediate elements 14 first (with one or more intermediate elements 14 located onto each of the first element 1, la, lb, lc), after which respective second metal elements 3 are welded onto the second metal sections lib of the intermediate elements 14. In order to form a panel receiving assembly, dimensions (in particular lengths) of the various elements are preferably matched. In other words: dimensions of the intermediate elements 14 are matched to the dimensions of the respective first elements 1, la, lb, lc (such that butt ends of the intermediate elements 14 are located at/above corners of the base frame BF). Similarly, dimensions of the second metal elements 3 are matched to the dimensions of the respective first elements 1, la, lb, lc (such that butt ends of the second metal elements 3 are located at/above the corners of the base frame BF).

Moreover, the first metal element 1, respective second metal element 3 and respective intermediate element 14 (with respective metal sections 11) can be mutually positioned in various ways during welding. For example, Figure 11A shows a first alternative wherein the second metal element 3 extends in parallel with the first metal element 1, with the intermediate element 14 extending there-between (providing an H-profile, viewed in cross-section. Figure 11B is similar to Fig. 11 A, showing an example wherein the second metal element 3 extends in parallel with the first metal element 1, but asymmetrically on the intermediate element 14.

Figures 11A-11G show further embodiments of the present invention (in cross-section), in particular embodiments of elements joined to form a respective system configured to receive a panel.

The examples of Figures 11A, 11B differ from the above-described embodiments in that the second metal element 3 is positioned in parallel with the first metal element 1 (i.e. central planes Kl, K2 of the elements extend in parallel). Such a configuration can e.g. be manufactured in the same way as described above, using the apparatus shown in the drawings. Optionally, a plurahty of second metal elements 3 can e.g.be used, being integral part of a respective base frame of second elements, similar to a base frame of first elements 1 (as described above). Then, such a second base frame can be welded onto the intermediate elements 14 (via respective metal sections lib) after those elements 14 have been welded (via respective metal sections 11a) to the base frame of first elements 1, la, lb, lc.

Figure 11C shows another non-limiting example wherein the first metal element 1 is positioned in parallel with the intermediate element 14 (i.e. respective central planes extend in parallel instead of orthogonally).

Figure 11D depicts yet another embodiment, which differs from the example of Fig. 11C in that the first metal element is a profile consisting of a plurality of elongated metal sections 1, 91 itself. In particular, the first metal element includes a first elongated metal section 1 that is welded to a metal section of the intermediate element 14, wherein the second section 91 of the metal profile protrudes e.g. from a lateral side of the first section 1. For example, the two sections 1, 91 can be welded together, or be made in one piece, as will be clear to the skilled person. Also, more than two sections can be welded together to form a profile V.

In a preferred embodiment, a said profile of elongated (strip shaped) metal sections 1, 91 can be welded together by the apparatus and method according to the present invention. In particular, as will be appreciated by the skilled person, the clamp structure 50 of the apparatus can have support surfaces for defining mutual welding positions of the two sections 1, 91, to be welded together (wherein the section 91 in fact forms a third elongated metal element of the system to be assembled).

Similarly, other system parts that are to be welded can be elongated profiles, or be welded to form profiles. For example (see Fig. HE), a second metal element 3’ can be a profile consisting of a plurality of elongated metal (strip shaped) sections or flanges 3, 93 (e.g. similar to profile V shown in Fig. 11D) . In that case, e.g. instead of a single second metal element 3, a plurality of elongated metal elements 3, 93 can be positioned and held in welding positions by the apparatus, wherein the apparatus can weld the plurality of elongated metal elements 3, 93 to form a respective elongated metal profile 3’ (that can be welded e.g. to the intermediate element 14). In particular, as will be appreciated by the skilled person, the clamp structure 50 of the apparatus can have support surfaces for defining mutual welding positions of the two sections 3, 93, to be welded together (wherein the elongated section 93 in fact forms another elongated metal element of the system to be assembled/welded).

It follows that in a preferred embodiment, the method can include: -positioning the third elongated metal element 91, 93 into the clamp structure 50 when the structure is in a respective opened state;

-closing a part (not shown) of the clamp structure 50 for retaining the third elongated element 91, 93 in a respective welding position; and welding the third elongated element 91, 93 (held in the welding position) to another metal elongated element 1, 3 (preferably also being held in a respective welding position by the clamp structure, as described above).

Figures 11F, 11G shows another example, which is similar to the embodiments of Fig. 11A, 11B.

As follows from Fig. 11G, a plurahty of intermediate elements 14A, 14B can be arranged between the first and second elements 1, 3, for example a plurality (in this case two) of spaced-apart intermediate elements 14A,

14B that extend in parallel. Manufacture of this configuration can include joining the first elongated metal element 1, and first intermediate element 14. This can be achieved in the same way as described above, using the apparatus shown in the drawings. Next, the second (spaced-apart) intermediate element 14B can be welded to the first elongated metal element 1. One or more spacer elements 77 can be placed between the two intermediate elements 14A, 14B during the clamping in the apparatus and welding of the second intermediate element 14B. In order to allow placement of the spacer element(s) 77 and the second intermediate element 14B, a said first part 50a of the clamping structure 50 can be temporarily withdrawn to provide space for placement thereof (wherein the first part 50a of the clamping structure can be activated again after their placement). The spacer element(s) 77 can maintain the desired spaced relationship between the intermediate elements 14A, 14B, in particular during clamping by an aforementioned first part 50a of the clamping structure 50. Next, the second metal elongated element 3 can be welded to the plurality of intermediate elements 14A, 14B (e.g. after removal of the one or more spacer elements 77).

Figure 11H shows yet another embodiment, which differs from the examples above in that the intermediate element 114 as such is made of metal (e.g. steel or aluminium), so that the intermediate element 114 itself can be directly welded to the first elongated metal element 1 and optional second elongated metal element 3. In this example, the intermediate metal element 114 as such has been made in one piece and therefore does not include additional metal connecting elements. Also, in this example, the intermediate element 114 as such (which is depicted in cross-section) can be an elongated metal profile, for example an extruded profile, e.g. having a number of parallel profile flanges 114A, 114B, 11C. In the present example, the flanges 114A, 114B, 114C mutually include angles Q of about 90 degrees (i.e. they extend orthogonally with respect to each other), but that is not required. The elongated profile 114 can be an open profile (as in the drawing), or closed profile. One or more of the flanges of the profile can be welded to the first and second elongated metal element 1, 3, using the apparatus described above.

In each of such alternative cases (of positioning the elements 1, 3, 14, 114), a dedicated clamp structure can be provided that has the respective support surfaces S1-S4 and other clamp components, for positioning and holding the elements in place during welding, as will be appreciated by the skilled person.

Besides, in a further embodiment, use can be made of one or more separate (e.g. removable) spacer elements for supporting one or more of the elongated elements 1, 3, 15 during the welding. Such spacer elements can e.g. be or temporarily become part of the clamp structure 50.

Further, as is shown in Figures, 4, 6, 10, a said first element lb can e.g. include a limited number of through-holes, for example relating to lock or bolt means (not shown) of the system at a later stage of assembly.

Also, in an embodiment, the repositioning of a base frame BF between subsequent clamping/welding positions can be carried out manually, e.g. by an operator. Alternatively, the manufacturing apparatus can include a frame handling robot for holding and repositioning the base frame BF between subsequent frame processing positions. Moreover, in the presently depicted examples, each of the substantially metal elongated elements 1, 3 and intermediate elongated elements 14, 114 extend in longitudinally straight lines, however, that is not essential. Alternatively, for example, curved or non-straight elements can be apphed, for example similar or the same as the configuration that is disclosed in PCT/NL2019/050022, which is deemed to be incorporated in the present application by reference in its entirety. Accordingly, the method can include a method for manufacturing a curved window system, wherein the system is to be provided e.g. with glazing panels, and with elements 1, 14 which extend along edges of the panels, wherein the method includes: -providing a flat sheet of metal base material;

-manufacturing a metal base frame BF having at least one panel opening O, out of the flat base material; curving the metal base frame BF out of a respective flat plane to a desired curvature, such that at least one edge of the panel opening is curved;

-providing a plurality of second flat elongated elements 14, to be joined with the frame BF along the edges of the panel opening O, at least one of the second elements 14 having a curvature in a second corresponding plane that extends substantially in parallel with respect to faced-away longitudinal side surfaces of that element 14. The curvature of the second element 14 can be such that it can be joined with a first side surface of the metal frame BF along a respective curved edge of the panel opening.

Also, the skilled person will appreciate that other shapes and methods are feasible within the scope of the present claims, for example a method wherein the curved base frame BF is provided from one or more first curved elements 1, without bending a flat base frame BF out of its plane.

It is preferred, for example for receiving and clamping differently shaped base frames BF for forming differently shaped systems (such as a flat base frame BF for manufacturing a non-curved system and a curved base frame BF for manufacturing a curved system) that a said clamp structure 50 can be adjusted into different positions with respect to a support surface T. For example, a vertical position and/or horizontal position of each of the clamp structures 50 can be adjustable, for example to be set to a desired clamp structure position for receiving a (curved or non- curved) base frame BF, as will be appreciated by the skilled person. Similarly, according to an embodiment a rotational position of each of the clamp structures 50 can be adjustable.

Further, the closing of clamp structures 50 for holding system components 1, 3, 14 in respective welding positions can be carried out at the same time, but that is not required. Also, the welding of various system components 1, 3, 14 can be carried out in various ways and at various times (e.g. simultaneously and/or in a certain sequence), as will be clear to the skilled person.

Moreover, as follows from the above, the method and apparatus according to the present invention can be configured for welding elongated metal (strip-shaped) elements of a panel receiving system, the elements including: at least one first elongated element 1;

- at least one intermediate part 14, to be positioned onto positioned a respective first elongated element 1; and preferably also at least one second elongated element, to be positioned onto a respective intermediate part 14; and for example also one or more third elongated elements 91, 93 that are to be positioned e.g. on a respective first or second elongated element 3. For example, as fohows from the drawings, a said third metal elongated element 91, 93 can be positioned at right angles (orthogonally) onto a lateral surface of a respective first or second elongated element, the elements 1, 3, 91, 93 extending in parallel (viewed along respective longitudinal axes). Also, it will be appreciated that a said third elongated metal element can be e.g. an aluminum or steel element.

Furthermore, in this application, the term “strip shaped element” can mean that the respective elongated element 1, 3, 91, 93 is a relatively flat element having a substantially rectangular cross-section (e.g. having a thickness smaller than 15 mm, a width in the range of 2-10 cm and a length of e.g. at least 50 cm, for example a length of at least 1 meter, or at least 2 meter), as follows from the drawings.