Metal sheet for obtaining an in-line roller skate frame and method for obtaining an in-line roller skate frame from such metal sheet

Description

Technical Field of the Invention

[0001] The present invention relates to a metal sheet for obtaining a frame for an in-line roller skate. The present invention also refers to a method for obtaining a frame for in-line roller skates starting from such a metal sheet.

Prior Art

[0002] EP 2 105 173 A1 discloses an in-line roller skate frame obtained from a metal sheet according to the preamble of claim 1.

[0003] As a rule, the frame for an in-line roller skate comprises a central support intended to receive the skate boot and a pair of side wings, between which a plurality of aligned wheels are mounted.

[0004] Said frame should be as light as possible, so as to improve the user's comfort during skating and avoid excessive and unnecessary efforts.

[0005] Moreover, manufacturing of said frame should be simple and inexpensive and it should allow to obtain a wide variety of different frame designs, even complicated ones, so as to satisfy the aesthetical requirements of the users.

[0006] Frames made of plastic or metallic material by casting molten material in a mould are known in the art.

[0007] Nevertheless, the costs for manufacturing such frames are very high, due to the expensiveness of the moulds as well as to the need for successive finishing and perfecting steps by mechanical machining.

[0008] Frames comprising a supporting base of plastic material and a pair of metallic side wings fastened to said supporting base by means of screws or other known fastening means and oriented in a direction opposite to the supporting base for the skate boot are known.

[0009] However, also the costs for manufacturing such frames are very high, due to the large number of different parts to be assembled together and to the large number of steps in the manufacturing process.

[0010] In order to obtain frames with a simpler structure and lower manufacturing costs, frames obtained from a metallic sheet folded into a "U"-shaped structure have also been developed. Nevertheless, even such frames are not free from drawbacks. First of all, since the frame is obtained by simply folding a metal sheet into a "U"-shaped structure, the number and variety of designs that can be obtained are limited. Secondly, in said frames the heel and the toe of the user are necessarily at the same level, which in general strongly limits the user's comfort.

[0011] The main object of the present invention is to overcome the drawbacks of prior art by providing a suitably shaped metal sheet that allows to obtain an in-line roller skate frame that is easy and inexpensive to manufacture while being at the same time versatile and comfortable.

[0012] A further object of the present invention is to provide a method for obtaining an in-line roller skate frame starting from a suitably shaped metal sheet that allows to make the manufacturing process of said frame easy and inexpensive. These and other objects are achieved by a metal sheet and a method as claimed in the appended claims.

Disclosure of the Invention

[0013] The metal sheet according to the invention has a pair of longitudinal slits that separate the central portion - intended to form the central support of the in-line roller skate frame, onto which the skate boot is to be mounted - from the lateral portions - intended to form the wings of the in-line roller skate frame, between which the aligned wheels are to be mounted.

[0014] Thanks to this measure, in the frame obtained from the metal sheet according to the invention the central support and the side wings are independent from each other, so as to ensure a high versatility in the choice of the form and design of such frame.

[0015] Moreover, thanks to the presence of the longitudinal slits, the central portion of the metal sheet according to the invention in shaped as a strip which is partially separate and independent from the lateral portions, so that it can be shaped at will.

[0016] More particularly, it can be shaped so that the rear portion, intended to support the user's heel, is at a height from the ground greater than the front portion, intended to support the user's toe, which increases the user's comfort. Thanks to the fact that, once the longitudinal slits are made, the in-line roller skates frame is obtained by simply folding the metal sheet according to the invention, its manufacturing process is simple and inexpensive.

Brief Description of the Drawings

[0017] Advantages and features of the invention will be clearer from the following description of a preferred embodiment thereof, given by way of non-limiting example, with reference to the accompanying drawings, wherein:

• Figures 1A to 1D show the metal sheet according to the invention in various steps of the manufacturing process; and
• Figure 1E shows the roller skates frame obtained from the metal sheet of Figures 1A - 1D.

Description of a Preferred Embodiment of the Invention

[0018] With particular reference to Figure 1A, the metal sheet 1 according to the invention is shown.

[0019] Preferably said metal sheet 1 is made of light metal, such as aluminium.

[0020] Said sheet 1 has a substantially quadrilateral shape and it comprises a front side 1a and a rear side 1b, opposite and substantially parallel to each other, and a pair of lateral sides 1c, 1d, they too being opposed and substantially parallel to each other. Said sheet 1 has a shape symmetrical about its longitudinal axis L, which is parallel to the lateral sides 1c, 1d and divides the front side 1a and the rear side 1b in substantially equal parts.

[0021] Preferably, the sides 1a - 1d are not straight, but they are shaped so as to give the desired appearance to the in-line roller skate frame made from the metal sheet 1.

[0022] According to the invention, the metal sheet 1 includes a pair of longitudinal slits 3c,3d starting from the front side 1a and extending until near the rear side 1b and defining a central portion 11 and a pair of lateral portions 13,15.

[0023] The slits 3c,3d are preferably - but not necessarily - symmetrical with respect to the longitudinal axis L.

[0024] Said slits 3c,3d extend in a substantially longitudinal direction, but they can be shaped according to a desired shape, thereby contributing to give the desired structure and appearance to the in-line roller skate frame made from the metal sheet 1.

[0025] In particular, the slits 3c, 3d are shaped so as to give a substantially "T"-shaped form to the central portion 11 with a wider front region 11a near the front side and a narrower intermediate region 11b.

[0026] The wider front region 11a of the central portion 11 is devised so as to allow the connection of the central portion 11 to the lateral portions 13,14 near the front side 1a in the in-line roller skate frame made from the metal sheet 1. To this purpose, through-holes 17 for the passage of connecting and fastening means, which are arranged symmetrically with respect to the longitudinal axis L, are provided in said region 11a.

[0027] Correspondingly, respective through-holes 19, also provided for the passage of said connecting and fastening means, are made in the lateral portions 13,15.

[0028] Figure 1A also shows a plurality of through-holes 5c,5d, respectively provided near the lateral sides 1c,1d, symmetrical with respect to the longitudinal axis L and intended for the passage of the wheel axles in the in-line roller skate frame made from the metal sheet 1. Said through-holes 5c,5d are preferably provided equidistant from each other along said lateral sides 1c,1d.

[0029] Furthermore, in Figure 1A a through-hole 7 provided in the front region 11a of the central portion 11 and a through-hole 9 provided in the rear region 11c of the central portion 11, near the rear side 1b, beyond the ends of the slits 3c,3d, are shown. These holes 7,9, which are aligned along the longitudinal axis L, are intended for the passage of the means for the connection to a boot in the in-line roller skate frame made from the metal sheet 1.

[0030] As it is evident from the above description and from Figure 1A, thanks to the presence of the longitudinal slits 3c,3d, the central portion 11 of the metal sheet 1 is a strip that is partially separated from the lateral portions 13,15 of the sheet itself, so that the front region 11a and the intermediate region 11b of said central portion 11 can be shaped at will independently from said lateral portions 13,15 for obtaining an in-line roller skate frame.

[0031] With reference to Figure 1B, the central portion 11 is preferably shaped by bending downwards the intermediate region 11b, so that the front region 11a of the central portion 11 is at a height lower than the rear region 11c of said central portion.

[0032] Turning now to Figure 1C, the central portion 11 is further shaped by folding down of about 90° the lateral ends 11a', 11a" of the region 11a carrying the through-holes 17, so that they are substantially perpendicular to the rest of the central portion 11 and the through-holes 17 are oriented outwards.

[0033] In Figure 1D, the metal sheet 1 is shown after that the lateral portions 13,15 have been folded downwards of about 90°, so as to be substantially perpendicular to the central portion 11.

[0034] The holes 19 provided in the lateral portions 13,15 are thus aligned with the holes 17 provided in the front region 11a of the central portion 11, thus allowing the passage of connecting and fastening means 21, which rigidly fasten said lateral portions 13,15 to said central portion 11 near the front side of the metal sheet 1.

[0035] These fastening means may be rivets 21, as shown in Figure 1D, bolts or the like.

[0036] Turning now to Figure 1E, the in-line roller skate frame obtained from the metal sheet 1 is shown.

[0037] The central portion 11 of said metal sheet forms the support for the skate boot.

[0038] More particularly, the front region 11a of the central portion 11 forms the platform for the toe of said shoe, while the rear region 11c of the central portion 11 forms the platform for the heel of said shoe.

[0039] As mentioned above, the through-holes 7,9 respectively provided in the front and rear regions 11a, 11c allow the passage of the means for the connection to the skate boot. Advantageously, since the rear region 11c is at a height greater than the front region 11a, the boot is inclined forward, which increases the user's comfort during use.

[0040] The lateral portions 13,15 of the metal sheet form instead the side wings of the frame.

[0041] As mentioned above, the holes 5c, 5d provided in the metal sheet 1 allow the passage of the axles of the skate in-line wheels.

[0042] It is evident from the above description that the invention achieves the object set forth above, since the in-line roller skate frame illustrated in Figure 1E, made from the metal sheet shown in Figures 1A - 1D, can be made in a wide variety of designs, while being simple and inexpensive to manufacture.

[0043] It is also clear that the above-described preferred embodiment is in no way to be considered as limiting and that many modifications and variants can be made without departing from the scope of protection of the invention as defined by the appended claims.

Claims

1. Metal sheet (1) for obtaining an in-line roller skate frame, said metal sheet having a substantially quadrilateral shape, comprising a front side (1a) and a rear side (1b), which are opposite and substantially parallel to each other, and a pair of lateral sides (1c,1d), which are opposed and substantially parallel to each other and have a symmetrical shape with respect to a longitudinal axis (L) that is parallel to said lateral sides (1c,1d) and divides said front and rear sides (1a,1b) into substantially equal parts, characterized in that it comprises a pair of longitudinal slits (3c,3d), starting from said front side (1a) and extending until near said rear side(1b), thus defining a central portion (11) and a pair of lateral portions (13,15).

2. Metal sheet (1) according to claim 1, wherein said slits (3c,3d) are symmetrical with respect to said longitudinal axis (L).

3. Metal sheet (1) according to claim 1 or 2, wherein said slits (3c,3d) are shaped so that said central portion (11) includes a wider front region (11a), a narrower intermediate region (11b) and a rear region (11c) beyond the ends of said slits (3c, 3d).

4. Metal sheet (1) according to claim 3, wherein through-holes (17) are provided at the lateral ends (11a', 11a") of said front region (11a) of said central portion (11), said through-holes being symmetrically arranged with respect to said longitudinal axis (L), and wherein respective through-holes (19) are correspondingly provided in said lateral portions (13,15).

5. Metal sheet (1) according to claim 3, wherein through-holes (7,9), aligned along said longitudinal axis (L), are provided in said front region (11a) and in said rear region (11c) of said central portion (11).

6. Metal sheet (1) according to any of the claims 1 to 5, wherein a plurality of through-holes (5c,5d) are provided near said lateral sides (1c, 1d) respectively, said through-holes being arranged symmetrical with respect to said longitudinal axis (L) and preferably equidistant from each other.

7. Metal sheet (1) according to any of the claims 1 to 6, made of light metal, preferably aluminium.

8. Method for obtaining an in-line roller skate frame from a metal sheet, characterized in that it comprises the following steps:

- providing a metal sheet (1), having a substantially quadrilateral shape, comprising a front side (1a) and a rear side (1b), which are opposite and substantially parallel to each other, and a pair of lateral sides (1c,1d), which are opposed and substantially parallel to each other and have a symmetrical shape with respect to a longitudinal axis (L) that is parallel to said lateral sides (1c,1d) and divides said front and rear sides (1a,1b) into substantially equal parts;

- making in said metal sheet (1) a pair of longitudinal slits (3c,3d), starting from said front side (1a) and extending until near said rear side (1b), thus defining a central portion (11) and a pair of lateral portions (13,15);

- bending downwards an intermediate region (11b) of said central portion (11), so that the front region (11a) of said central portion (11) near said front side (1a) is at a height lower than the rear region (11c) of said central portion (11) near said rear side (1b);

- folding downwards the lateral ends (11a', 11a") of said front region (11a) of said central portion (11) so that they are substantially perpendicular to said central portion (11);

- folding downwards said lateral portions (13,15) so that they are substantially perpendicular to said central portion (11);

- fastening said lateral portions (13,15) to said lateral ends (11a',11a") of said front region (11a) of said central portion (11).

9. Method according to claim 8, wherein said slits (3c, 3d) are shaped so as to give a substantially "T"-shaped structure to said central portion (11), so that the front region (11a) of said central portion is wider than said intermediate region (11b) of said central portion.

10. Method according to claim 8 or 9, wherein through-holes (17) are provided in said lateral ends (11a',11a") of said front region (11a) of said central portion (11) and wherein through-holes (19) are correspondingly provided in said lateral portions (13,15), said through-holes (17,19) being aligned to each other at the end of the folding steps.

11. Method according to any of the claims 8 to 10, further comprising the step of providing through-holes (7,9) aligned along said longitudinal axis (L) in said front region (11a) and in said rear region (11c) of said central portion (11).

12. Method according to any of the claims 8 to 11, further comprising the step of providing a plurality of through-holes (5c, 5d), symmetrical with respect to said longitudinal axis (L) and preferably equidistant from each other, in said lateral portions (13,15), near said lateral sides (1c, 1d).

13. In-line roller skate frame, comprising a central support, intended to support the skate boot and comprising a platform for the heel of said shoe and a platform for the toe of said shoe, and side wings, intended to carry the wheel axles of said skate, whereby it is obtained according to the method claimed in claim 8, whereby said central portion (11) of said metal sheet (1) forms said central support and said lateral portions (13,15) of said metal sheet (1) form said side wings.

Ansprüche

1. Metallplatte (1) zur Erzeugung eines Rahmens für Inline-Skates, wobei die Metallplatte eine im Wesentlichen vierseitige Form aufweist mit einer Vorderseite (1a) und einer Rückseite (1b), die zueinander entgegengesetzt und zueinander im Wesentlichen parallel sind, und einem Paar lateraler Seiten (1c, 1d), die zueinander entgegengesetzt und zueinander im Wesentlichen parallel sind und eine symmetrische Form in Bezug auf eine Längsachse (L) aufweisen, die zu den lateralen Seiten (1c, 1d) parallel ist und die Vorderseite und die Rückseite (1a, 1b) in im Wesentlichen gleiche Teile unterteilt, dadurch gekennzeichnet, dass die Metallplatte ein Paar Längsschlitze (3c, 3d) aufweist, die an der Vorderseite (1a) beginnen und sich bis in die Nähe der Rückseite (1b) erstrecken, wodurch ein zentraler Teil (11) und ein Paar lateraler Teile (13, 15) definiert werden.

2. Metallplatte (1) nach Anspruch 1, wobei die Schlitze (3c, 3d) in Bezug auf die Längsachse (L) symmetrisch sind.

3. Metallplatte (1) nach Anspruch 1 oder 2, wobei die Schlitze (3c, 3d) derart geformt sind, dass der zentrale Teil (11) einen breiteren Vorderbereich (11a), einen schmaleren Zwischenbereich (11b) und einen Hinterbereich (11c) jenseits der Enden der Schlitze (3c, 3d) beinhaltet.

4. Metallplatte (1) nach Anspruch 3, wobei Durchgangsbohrungen (17) an den lateralen Enden (11a', 11a") des Vorderbereichs (11a) des zentralen Bereichs (11) vorgesehen sind, wobei die Durchgangsbohrungen in Bezug auf die Längsachse (L) symmetrisch angeordnet sind und wobei jeweilige Durchgangsbohrungen (19) in den lateralen Teilen (13, 15) entsprechend vorgesehen sind.

5. Metallplatte (1) nach Anspruch 3, wobei Durchgangsbohrungen (7, 9), die entlang der Längsachse (L) ausgerichtet sind, in dem Vorderbereich (11a) und in dem Hinterbereich (11c) des zentralen Teils (11) vorgesehen sind.

6. Metallplatte (1) nach einem der Ansprüche 1 bis 5, wobei mehrere Durchgangsbohrungen (5c, 5d) jeweils in der Nähe der lateralen Seiten (1c, 1d) vorgesehen sind, wobei die Durchgangsbohrungen in Bezug auf die Längsachse (L) symmetrisch und vorzugsweise in gleichen Abständen voneinander angeordnet sind.

7. Metallplatte (1) nach einem der Ansprüche 1 bis 6, hergestellt aus Leichtmetall, vorzugsweise Aluminium.

8. Verfahren zum Herstellen eines Rahmens für Inline-Skates aus einem Metallblech, dadurch gekennzeichnet, dass das Verfahren die folgenden Schritte umfasst:

- Bereitstellen eines Metallblechs (1), das eine im Wesentlichen vierseitige Form aufweist mit einer Vorderseite (1a) und einer Rückseite (1b), die zueinander entgegengesetzt und zueinander im Wesentlichen parallel sind, und einem Paar lateraler Seiten (1c, 1d), die zueinander entgegengesetzt und zueinander im Wesentlichen parallel sind und eine symmetrische Form in Bezug auf eine Längsachse (L) aufweisen, die zu den lateralen Seiten (1c, 1d) parallel ist und die Vorderseite und die Rückseite (1a, 1b) in im Wesentlichen gleiche Teile unterteilt;

- Erzeugen eines Paares Längsschlitze (3c, 3d) in dem Metallblech (1), die an der Vorderseite (1a) beginnen und sich bis in die Nähe der Rückseite (1b) erstrecken, wodurch ein zentraler Teil (11) und ein Paar lateraler Teile (13, 15) definiert werden;

- Biegen eines Zwischenbereichs (11b) des zentralen Teils (11) nach unten, so dass der Vorderbereich (11a) des zentralen Teils (11) in der Nähe der Vorderseite (1a) in einer Höhe ist, die niedriger als der Hinterbereich (11c) des zentralen Teils (11) in der Nähe der Rückseite (1b) ist;

- Falten der lateralen Enden (11a', 11a") des Vorderbereichs (11a) des zentralen Teils (11) nach unten, so dass sie zu dem zentralen Teil (11) im Wesentlichen senkrecht sind;

- Falten der lateralen Teile (13, 15) nach unten, so dass sie zu dem zentralen Teil (11) im Wesentlichen senkrecht sind;

- Befestigen der lateralen Teile (13, 15) an den lateralen Enden (11a', 11a") des Vorderbereichs (11a) des zentralen Teils (11).

9. Verfahren nach Anspruch 8, wobei die Schlitze (3c, 3d) derart geformt sind, dass sie eine im Wesentlichen "T"-förmige Struktur zu dem zentralen Teil (11) ergeben, so dass der Vorderbereich (11a) des zentralen Teils breiter als der Zwischenbereich (11b) des zentralen Teils ist.

10. Verfahren nach Anspruch 8 oder 9, wobei Durchgangsbohrungen (17) in den lateralen Enden (11a', 11a") des Vorderbereichs (11a) des zentralen Teils (11) vorgesehen sind und wobei jeweilige Durchgangsbohrungen (19) in den lateralen Teilen (13, 15) entsprechend vorgesehen sind, wobei die Durchgangsbohrungen (17, 19) am Ende der Faltschritte aufeinander ausgerichtet werden.

11. Verfahren nach einem der Ansprüche 8 bis 10, das weiterhin den Schritt des Vorsehens von Durchgangsbohrungen (7, 9) umfasst, die entlang der Längsachse (L) in dem Vorderbereich (11a) und in dem Hinterbereich (11c) des zentralen Teils (11) ausgerichtet sind.

12. Verfahren nach einem der Ansprüche 8 bis 11, das weiterhin den Schritt des Vorsehens mehrerer Durchgangsbohrungen (5c, 5d), die in Bezug auf die Längsachse (L) symmetrisch und vorzugsweise in gleichen Abständen voneinander sind, in den lateralen Teilen (13, 15) in der Nähe der lateralen Seiten (1c, 1d) umfasst.

13. Inline-Skate-Rahmen mit einer zentralen Stütze, die den Skate-Stiefel stützen soll und eine Plattform für den Absatz dieses Schuhs und eine Plattform für die Sohle dieses Schuhs und Seitenflügel, die die Radachsen des Skates tragen sollen, umfasst, wobei der Rahmen gemäß dem Verfahren nach Anspruch 8 hergestellt ist, wobei der zentrale Teil (11) des Metallblechs (1) die zentrale Stütze bildet und die lateralen Teile (13, 15) des Metallblechs (1) die Seitenflügel bilden.

Revendications

1. Plaque de métal (1) pour fabriquer un châssis de patin à roulettes en ligne, ladite plaque de métal présentant essentiellement une forme de quadrilatère, comportant un côté avant (1a) et un côté arrière (1b), lesquels sont opposés et essentiellement parallèles l'un à l'autre, et une paire de côtés latéraux (1c, 1d), lesquels sont opposés et essentiellement parallèles l'un à l'autre et présentent une configuration symétrique par rapport à un axe longitudinal (L) qui est parallèle aux dits côtés latéraux (1c, 1d) et divise lesdits côtés avant et arrière (1a, 1b) en parties essentiellement égales, caractérisée en ce qu'elle comprend une paire de fentes longitudinales (3c, 3d), démarrant à partir dudit côté avant (1a) et s'étendant jusqu'à proximité dudit côté arrière (1b), définissant ainsi une partie centrale (11) et une paire de parties latérales (13, 15).

2. Plaque de métal (1) selon la revendication 1, dans laquelle lesdites fentes (3c, 3d) sont symétriques par rapport au dit axe longitudinal (L).

3. Plaque de métal (1) selon la revendication 1 ou 2, dans laquelle lesdites fentes (3c, 3d) sont configurées de façon que ladite partie centrale (11) inclue une zone avant relativement large (11a), une zone intermédiaire relativement étroite (11b) et une zone arrière (11c) au-delà des extrémités desdites fentes (3c, 3d).

4. Plaque de métal (1) selon la revendication 3, dans laquelle des trous traversants (17) sont prévus au niveau des extrémités latérales (11a', 11a") de ladite zone avant (11a) de ladite partie centrale (11), lesdits trous traversants étant disposés symétriquement par rapport au dit axe longitudinal (L), et dans laquelle des trous traversants respectifs (19) sont prévus de façon correspondante dans lesdites parties latérales (13, 15).

5. Plaque de métal (1) selon la revendication 3, dans laquelle des trous traversants (7, 9), alignés le long dudit axe longitudinal (L) sont prévus dans ladite zone avant (11a) et dans ladite zone arrière (11c) de ladite partie centrale (11).

6. Plaque de métal selon l'une quelconque des revendications 1 à 5, dans laquelle plusieurs trous traversants (5c, 5d) sont prévus respectivement à proximité desdits côtés latéraux (1c, 1d), lesdits trous traversants étant disposés symétriquement par rapport au dit axe longitudinal (L) et, de préférence, équidistants les uns des autres.

7. Plaque de métal (1) selon l'une quelconque des revendications 1 à 6, fabriquée en métal léger, de préférence en aluminium.

8. Procédé pour fabriquer un châssis de patin à roulettes en ligne à partir d'une plaque de métal, caractérisé en ce qu'il comporte les étapes suivantes :

- fournir une plaque de métal (1), présentant une forme essentiellement de quadrilatère, comportant un côté avant (1a) et un côté arrière (1b), opposés et essentiellement parallèles l'un à l'autre, et une paire de côtés latéraux (1c, 1d), lesquels sont opposés et essentiellement parallèles l'un à l'autre et présentent une configuration symétrique par rapport à un axe longitudinal (L) qui est parallèle aux dits côtés latéraux (1c, 1d) et divise lesdits côtés avant et arrière (1a, 1b) en des parties essentiellement égales ;

- former dans ladite plaque de métal (1) une paire de fentes longitudinales (3c, 3d), partant dudit côté avant (1a) et s'étendant jusqu'à proximité dudit côté arrière (1b), définissant ainsi une partie centrale (11) et une paire de parties latérales (13, 15) ;

- cintrer vers le bas une zone intermédiaire (11b) de ladite partie centrale (11), de sorte que la zone avant (11a) de ladite partie centrale (11) proche dudit côté avant (1a) se trouve à une moindre hauteur que la zone arrière (11c) de ladite partie centrale (11) proche dudit côté arrière (1b) ;

- plier vers le bas les extrémités latérales (11a', 11a") de ladite zone avant (11a) de ladite partie centrale (11) de façon qu'elles soient essentiellement perpendiculaires à ladite partie centrale (11) ;

- plier vers le bas lesdites parties latérales (13, 15) de façon qu'elles soient essentiellement perpendiculaires à ladite partie centrale (11) ;

- fixer lesdites parties latérales (13, 15) aux dites extrémités latérales (11a', 11a") de ladite zone avant (11a) de ladite partie centrale (11).

9. Procédé selon la revendication 8, dans lequel lesdites fentes (3c, 3d) sont configurées de façon à conférer une structure essentiellement en forme de « T » à ladite partie centrale (11), de sorte que ladite zone avant (11a) de ladite partie centrale est plus large que ladite zone intermédiaire (11b) de ladite partie centrale.

10. Procédé selon la revendication 8 ou 9, dans lequel des trous traversants (17) sont prévus dans lesdites extrémités latérales (11a', 11a") de ladite zone avant (11a) de ladite partie centrale (11) et dans lequel des trous traversants (19) sont prévus de façon correspondante dans lesdites parties latérales (13, 15), lesdits trous traversants (17, 19) étant alignés les uns avec les autres à la fin des étapes de pliage.

11. Procédé selon l'une quelconque des revendications 8 à 10, comprenant, de plus, l'étape consistant à prévoir des trous traversants (7,9) alignés le long de l'axe longitudinal (L) dans ladite zone avant (11a) et dans ladite zone arrière (11c) de ladite partie centrale (11).

12. Procédé selon l'une quelconque des revendications 8 à 11, comprenant, de plus, l'étape consistant à prévoir plusieurs trous traversants (5c, 5d), symétriques par rapport au dit axe longitudinal (L) et, de préférence, équidistants les uns des autres, dans lesdites parties latérales (13, 15), à proximité desdits côtés latéraux (1c, 1d) .

13. Châssis de patin à roulettes en ligne, comportant un support central, conçu pour supporter la semelle du patin à roulettes et comprenant une plateforme pour le talon de ladite chaussure et une plateforme pour le bout de ladite chaussure, et des ailes latérales conçues pour supporter les essieux des roues dudit patin à roulettes, de façon qu'il soit fabriqué selon le procédé revendiqué selon la revendication 8, de sorte que ladite partie centrale (11) de ladite plaque de métal (1) forme ledit support central et que lesdites parties latérales (13, 15) de ladite plaque de métal (1) forment lesdites ailes latérales.

Drawing