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Patent_(FK)_EP 2 843 177 B1

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Patent_(FK)_EP 2 843 177 B1

  1. 1. Note: Within nine months of the publication of the mention of the grant of the European patent in the European Patent Bulletin, any person may give notice to the European Patent Office of opposition to that patent, in accordance with the Implementing Regulations. Notice of opposition shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). Printed by Jouve, 75001 PARIS (FR) (19)EP2843177B1 TEPZZ 84¥_77B_T (11) EP 2 843 177 B1 (12) EUROPEAN PATENT SPECIFICATION (45) Date of publication and mention of the grant of the patent: 15.07.2015 Bulletin 2015/29 (21) Application number: 13182330.4 (22) Date of filing: 30.08.2013 (51) Int Cl.: E06B 9/15 (2006.01) (54) Roller shutter slat, method of producing a roller shutter slat and apparatus for producing a roller shutter slat Rollladenlamelle, Verfahren zur Herstellung einer Rollladenlamelle und Vorrichtung zur Herstellung einer Rollladenlamelle Lame pour volet roulant, procédé et appareil de production d’une lame pour volet roulant (84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (43) Date of publication of application: 04.03.2015 Bulletin 2015/10 (73) Proprietor: Regazzi SA 6596 Gordola (CH) (72) Inventors: • Karagulian, Federico 28922 Verbania (IT) • Baumann, Werner 6616 Losone (CH) (74) Representative: Gottschalk, Matthias Maiwald Patentanwaltsgesellschaft (Schweiz) mbH Splügenstrasse 8 8002 Zürich (CH) (56) References cited: EP-A1- 0 365 908 EP-A2- 0 806 541 DE-A1- 3 305 677 FR-A1- 2 857 563 JP-A- 2009 228 286
  2. 2. EP 2 843 177 B1 2 5 10 15 20 25 30 35 40 45 50 55 Description [0001] The invention relates to a roller shutter slat ac- cording to the preamble of claim 1. Furthermore, the in- vention relates to a method and to an apparatus for pro- ducing a roller shutter slat. Background of the invention [0002] Roller shutters for solar protection of a building often comprise a plurality of vertically moveable slats in order to lower them down into a closed position or to lift them up into an open position. The lowering and lifting action can be performedmanuallyor automatically. Com- monly known are roller shutter slats made from a coated aluminum strip roll-formed into a hollow body profile hav- ing a male upper end and a female lower end for engage- ment with other slats when lowered down into the closed position. The engagement of the slats prevents intrusion of surface water, in particular when the upper end of each slat has a male, i.e. convex formed, configuration and the lower end has a correspondingly female, i.e. concave formed, configuration. [0003] When the roller shutter is lowered down, the slats contact each other thereby regularly producing, due to the material and the hollow body profile of each slat, anannoying noise. Inorder toreducethenoiseit isknown to fill the hollow body profile of each slat with an insulating material. Using an insulating material for filling the hollow body profile of the slats has the additional effect that the shutter provides a thermal insulation when closed. [0004] EP 0 365 908 A1 discloses a roller shutter slat made of an aluminum strip roll-formed into a hollow body profile having a hooked and a G-shaped connecting end. For use in a soundproof shutter the slat has a plastic coating extruded or laminated on the inner face of the hollow body profile such that a double-layer plastic coat- ing is formed in the area of the connecting ends for mutual sound isolation. In addition, the hollow body profile may be filled with a plastic foam material. [0005] DE 33 05 677 A1 discloses a roller shutter slat consisting of a metal shell and a plastic shell forming a hollow body profile filled with an insulating material. The two shells are connected at each end by forming resulting in hook-shaped ends. [0006] A roller shutter slat made of an aluminum strip by roll-forming is further known from EP 0 806 541 A2. The front or back of the aluminum profile is covered by a plastic strap extending from one hook-shaped end to the other. In order to improve weather-resistance of the slat the plastic strap is reinforced by a woven textile. [0007] JP 2009-228286 A shows roller shutter slats made of an aluminum plate having a surface coated with a film in order to improve scratch resistance and weath- erability. The coating may comprise a lubricating agent such as PTFE. [0008] FR 2 857 563 A1 further discloses roller shutter slats connected to each other by gasket joints having end-caps made of PTFE. [0009] For the production of roller shutter slats it is well known to use coated aluminum strips. The coating is ap- plied on the aluminum strip before it is roll-formed. In general the function of the coating is to improve the ap- pearance and/or to increase the wear resistance of the slat made thereof. Thus the coating is applied to the side of the aluminum strip forming the later outside of the hol- low body. For this purpose, very often coatings are used, that are prone to trap water in humid environments. Fur- thermore, it is common to use water-based coatings. Un- fortunately, roller shutter slats made of such coated alu- minum strips, in use, tend to stick together when exposed to high temperatures, e.g. temperatures of 35°C and more. As a consequence, during lifting the shutter the slats at first stick together and than drop witha loud noise. [0010] It isan object of the present invention to improve a roller shutter slat roll-formed from a coated aluminum strip so that it does not tend to stick to an adjacent slat when exposed to high temperatures. [0011] This object is achieved by a roller shutter slat according to claim 1. Preferred embodiments of the in- vention are specified in the depending claims. This object is further achieved by a method for producing a roller shutter slat according to claim 6 and an apparatus for producing a roller shutter slat according to claim 12. Summary of the invention [0012] Proposed is a roller shutter slat roll-formed from a coated aluminum strip to a hollow body profile having amale upper endandafemalelower endfor engagement with one or more other slats. According to the invention at least one end, preferably the female lower end, of the hollow body profile comprises a coating based on a pol- ytetrafluoroethylene (PTFE) solvent dispersion. PTFE is resistant against temperatures up to 300°C and has a very low friction coefficient against other solids. As a con- sequence, the coating based on a PTFE solvent disper- sion prevents the slats from sticking to each other when exposed tohigh temperatures. Further advantagesrelate to a reduced wear of the surface on which the coating is applied andof surfacesgettingincontact withthecoating. Accordingly, the coating may be applied to only one end of the hollow body profile. [0013] PTFE is available in form of micro-spheres with an average diameter of less than 10 microns. Dispersed in a solvent, such as naphtha or propanol, it can be ap- plied in a thin layer forming a colorless coating after dry- ing. The solvent evaporates quickly, so that a coating based on a PTFE solvent dispersion dries fast. Thus, the application of the coating can be easily implemented in the current production process of a roller shutter slat with- out changing the production time. [0014] Preferably, the coating stretches across an in- wardly bent part of the female lower end of the hollow body profile. This region forms the contact area by en- gagement with the male upper end of a further slat in a 1 2
  3. 3. EP 2 843 177 B1 3 5 10 15 20 25 30 35 40 45 50 55 closed position of the roller shutter. The coating on the contact area prevents that the two slats stick together when the roller shutter is lifted. Besides, due to the fact that the area is inwardly bent, the coating is not visible. [0015] The area of contact is the area most prone to wear. Due to the low friction coefficient of the PTFE con- tained in the coating, wear is reduced as favorable side effect. [0016] In a preferred embodiment of the invention the coating has a thickness of 5 mm to 20 mm, preferably of 7 mm to 15 mm. Such a thin layer coating does not build up, so that it is not necessary to change the dimensions of the respective end of the hollow body profile in order to fit the respective end of another slat for engagement. [0017] Advantageously, the hollow body profile is filled with a thermal and/or acoustic insulation material, pref- erably with plastic foam material, most preferably with polyurethane. The insulation material inside the hollow body profile prevents the formation of a thermal bridge and absorbs sound. [0018] Furthermore, a roller shutter for solar protection is proposed, comprising at least two slats according to the invention. The slats are vertically movable such, that in a closed position a male upper end of a first slat en- gages with a female lower end of a second slat. Due to the coating on at least one end of the hollow body profile of each slat, the slats won’t stick together when exposed to high temperatures. Accordingly, the loud noise, that occurs when the slats suddenly detach and drop down during lifting, isavoided. Thus, theroller shutter proposed allows for quiet operation. [0019] In order to achieve the object named above, a method is proposed for producing a roller shutter slat from a coated aluminum strip. The method comprises the following steps: - roll-forming the coated aluminum strip to a hollow body profile having a male upper end and a female lower end and - depositing a PTFE solvent dispersion on at least one end, preferably the female lower end, of the hollow body profile. The deposition of the PTFE solvent dis- persion follows the roll-forming process. [0020] In order to achieve an anti-adhesion coating, preferably the PTFE solvent dispersion is deposited in a thin layer of few microns. Preferably, the PTFE solvent dispersion is deposited in a layer having a thickness of 5 mm to 20 mm, most preferably of 7 mm to 15 mm. [0021] According to a preferred embodiment of the in- vention, the PTFE solvent dispersion is deposited by spraying. Deposition by spraying facilitates the formation of thin layers. Besides, it enables an evenly spread coat- ing. [0022] The use of coated aluminum strips for the pro- duction of a roller shutter slat, may afford a further step, in particular by use of aluminum strips coated with a coat- ing that tends to trap water in environments with high relative humidity. In order to eliminate water molecules present in the coatingof the aluminum strip, it is proposed to heat the coated aluminum strip before being roll- formed and/or before applying the PTFE solvent disper- sion. This action ensures permanent deposition of the PTFE solvent dispersion on the coated surface of the aluminum strip. [0023] Preferably, the coated aluminum strip is heated up by infrared radiation to a temperature of 100 to 250°C, most preferably 150 to 200°C. [0024] Further preferably, the coated aluminum strip is cooled down to a temperature of 10 to 60°C, most preferably 20 to 40°C, directly after heating. Cooling down the aluminum strip may be done by a cold air flow. [0025] As an optional step the method according to the invention may comprise the step of filling the hollow body profile with a thermal and/or acoustic material, preferably with plastic foam, most preferably with polyurethane, be- fore deposition of the PTFE solvent dispersion. The op- tional step of filling the hollow body profile with an insu- lating material may comprise a further step of heating, in particular when plastic foam is used as insulating mate- rial. Preferably, the slat is heated up to a temperature of 30 to 50°C, most preferably 35 to 45°C, in order to liquefy the plastic foam material for injection. After injection, the plastic foam material undergoes an exothermic process and expands inside the hollow body profile until the hol- low space is completely filled with plastic foam. [0026] During expansion and hardening of the plastic foam material, the PTFE solvent dispersion may be ap- plied. Hence, the production of roller shutter slats accord- ing to the present invention does not afford more produc- tion time. The step of depositing the PTFE solvent dis- persion on at least one end of the hollow body profile can be easily implemented in the current method of produc- tion. [0027] Inorder to accelerate dryingof thePTFEsolvent dispersion after deposition, the hollow body profile may be exposed to an air flow preferably produced by a plu- rality of fans. The air flow boosts evaporation of the sol- vent. [0028] At the end, when the coating on at least one end of the hollow body profile is dry and the insulating material inside has set - provided that the hollow body profile has been filled - the slat is ready to be punched and/or cut. For punching the slat a punch press can be used. [0029] Furthermore, an apparatus is proposed for pro- ducing a roller shutter slat from a coated aluminum strip. The apparatus comprises: - a heating device for heating up the coated aluminum strip, preferably by infrared radiation, - a cooling device for cooling down the coated alumi- num strip directly after heating, - a profiling unit comprising a plurality of rollers for roll- forming the coated aluminum strip into a hollow body 3 4
  4. 4. EP 2 843 177 B1 4 5 10 15 20 25 30 35 40 45 50 55 profile having a male upper end and a female lower end and - a spraying device for depositing of a PTFE solvent dispersion on at least one end, preferably the female lower end, of the hollow body profile. The apparatus allows for production of a roller shutter slat according to the present invention. [0030] Preferably, the components of the apparatus are arranged in the order of mention. Accordingly, the coated aluminum strip for production of a roller shutter slat at first passes the heating device. Preferably, the heating device comprises means for the generation of infrared radiation in order to heat up the coated aluminum strip to a temperature of 100 to 250°C, preferably 150 to 200°C. After passing the heating device, the coated alu- minum strip passes the cooling device where the strip is cooled down, preferably to a temperature of 10 to 60°C, most preferably 20 to 40°C. The cooling device may com- prise one or more fans for the generation of a cold air flow. Shortly after, the strip reaches the profiling unit, where it is roll-formed into the hollow body profile having a male upper end and a female lower end. The spraying device for deposition of the anti-adhesion coating on at least one end of the hollow body profile follows the pro- filing unit. [0031] The apparatus may further comprise a filling de- vice for filling the hollow body profile with athermal and/or acoustic insulation material, preferably with plastic foam, most preferably with polyurethane. Preferably, the filling device is arranged between the profiling unit and the spraying device. [0032] In addition, a further heating device may be pro- vided for heating up the hollow body profile, preferably to a temperature of 30 to 50°C, most preferably 35 to 45°C. This facilitates filling the hollow body profile with insulating material, in particular with plastic foam material due to its liquefaction. Thus, the further heating device may be a component of the filling device. [0033] Optionally, an evaporating unit may be ar- ranged after the spraying device. The evaporating unit may comprise one or more fans for generation of air flow. The air flow supports drying of the PTFE solvent disper- sion deposited on at least one end of the hollow body profile. [0034] Advantageously, the apparatus allows for con- tinuous production of a plurality of roller shutter slats. For this reason, the apparatus may further comprise a con- veyer system for conveying the coated aluminum strip or the hollow body profile respectively. A continuous pro- duction reduces production costs. [0035] Preferred embodiments of a roller shutter slat, a roller shutter and an apparatus for producing a roller shutter will be described in more detail hereafter. The description refers to the accompanying drawings. In the drawings: Fig. 1 is a cross section of a slat according to the invention, Fig. 2a) is an elevational view and b) is a cross sec- tion of a lowered roller shutter comprising a plurality of slats according to fig. 1, Fig. 3 is a partial cross section of two engaged slats according to Fig. 2b), Fig. 4 is a schematic illustration of an apparatus ac- cording to the invention, Fig. 5 is a schematic elevational view of a spraying device and Fig. 6 is a schematic side view of the spraying device of fig. 5. Detailed description of the drawings [0036] As shown in fig. 1, the slat 1 has a hollow body profile with a male upper end 2 and a female lower end 3. The male upper end 2 has a convex shape, whereas the female lower end 3 has a concave shape. Both ends 2, 3 are adapted to engage when arranged one on the top of the other. This is the case when a roller shutter comprising at least two of these slats is lowered down as can be seen in fig. 2a) and fig. 2b), which show a partial elevational view and a partial cross section of a roller shutter in closed condition. By engagement, the male upper end 2 of first slat 1 contacts the female lower end 3 of second slat 1. The area of contact is linear due to the differently curved shapes of both ends 2, 3. When engaged, a hollow space remains between the male up- per end 2 of first slat 1 and the female lower end 3 of second slat 1 preventing jamming of the slats 1. [0037] As shown in fig. 3, the female lower end 3 of second slat 1 has a coating 4 in the area of contact with the male upper end 2 of first slat 1. The coating is based on a PTFE solvent dispersion serving as anti-adhesion coating such that sticking of the slats 1 is prevented. In order tofacilitatethe depositionof the coating 4, theentire inwardly bent part of the female lower end 3 is coated. [0038] Bymeansof fig. 4,whichisshowingaschematic illustration of an apparatus according to the invention, the production of a roller shutter slat 1 will be described. [0039] The present apparatus comprises a heating de- vice 5 for heating up the coated aluminum strip to a tem- perature of 180°C in order to eliminate water molecules contained in the coating already deposited on the alumi- num strip. The heating device 5 is followed by a cooling device 6 for cooling down the coated aluminum strip to a temperature of 30°C. After the cooling device 6 a pro- filing unit 7 is provided comprising a plurality of rolls 8 for roll-forming the coated aluminum strip into a hollow body profile. The apparatus further comprises a filling device 10 for filling the hollow body profile with a thermal and acoustic insulation material. During filling the hollow body 5 6
  5. 5. EP 2 843 177 B1 5 5 10 15 20 25 30 35 40 45 50 55 profile is heated up to a temperature of 40°C by a further heating device 11 arranged in proximity of the filling de- vice 10. After filling, the PTFE solvent dispersion is de- posited on one end of the hollow body profile by means of a spraying device 9. The spraying device 9, as shown in fig. 5 and 6, uses compressed air 17 for the deposition of the PTFE solvent dispersion 19. The air facilitates the deposition in a thin even layer. The spraying device 9 is followed by an evaporating unit 12 comprising a plurality of fans 13 generating an air flow which boosts the drying of the PTFE solvent dispersion. At the end, the apparatus comprises a punching and/or cutting device 14 as well as a storage device 15 for storing the finished slats1. The punching and/or cutting device 14 comprises a punch press. [0040] The apparatus according to fig. 4 allows for con- tinuous production of roller shutter slats 1. The coated aluminum strip material used for the production is coiled up (see coil 18), so it can easily be fed to the apparatus. [0041] The drawings refer to preferred embodiments and therefore do not limit the scope of invention. Modifi- cations are possible which may relate to the shape of a slat 1 and/or the complexity of the apparatus shown in the drawings. Reference list [0042] 1 slat 2 male upper end 3 female lower end 4 coating 5 heating device 6 cooling device 7 profiling unit 8 roller 9 spraying device 10 filling device 11 heating device 12 evaporating unit 13 fan 14 punching and/or cutting device 15 storage device 16 PTFE solvent dispersion 17 compressed air 18 coil 19 PTFE solvent dispersion Claims 1. Roller shutter slat (1) roll-formed from a coated alu- minum strip to a hollow body profile having a male upper end (2) and a female lower end (3) for engage- ment with one or more other slats (1), characterized in that at least one end (2, 3), pref- erably the female lower end (3), of the hollow body profile comprises a coating (4) based on a PTFE solvent dispersion. 2. Roller shutter slat according to claim 1, characterized in that the coating (4) stretches across an inwardly bent part (5) of the female lower end (3) of the hollow body profile. 3. Roller shutter slat according to claim 1 or 2, characterized inthat thecoating (4) hasa thickness of 5 mm to 20 mm, preferably of 7 mm to 15 mm. 4. Roller shutter slat according to one of the preceding claims, characterized in that the hollow body profile is filled with a thermal and/or acoustic insulation material, preferably with plastic foam material, most prefera- bly with polyurethane. 5. Roller shutter for solar protection comprising at least two slats (1) according to one of the preceding claims,wherein theslatsareverticallymovablesuch, that in a closed position a male upper end (2) of a first slat (1) engages with a female lower end (3) of a second slat (1). 6. Method for producing a roller shutter slat (1) from a coated aluminum strip, comprising the steps - roll-forming the coated aluminum strip to a hol- low body profile having a male upper end (2) and a female lower end (3) and - depositing a PTFE solvent dispersion on at least one end (2, 3), preferably the female lower end (3), of the hollow body profile. 7. Method according to claim 6, characterized in that the PTFE solvent dispersion is deposited by spraying. 8. Method according to claim 6 or 7, characterized in that the coated aluminum strip is heated before being roll-formed and/or before apply- ing the PTFE solvent dispersion in order to eliminate water molecules present in the coating of the alumi- num strip. 9. Method according to claim 8, characterized in that the coated aluminum strip is heated up by infrared radiation to a temperature of 100 to 250°C, preferably 150 to 200°C. 10. Method according to claim 8 or 9, characterized in that the coated aluminum strip is cooled down to a temperature of 10 to 60°C, prefer- ably 20 to 40°C, directly after heating. 11. Method according to any one of the preceding claims 7 8
  6. 6. EP 2 843 177 B1 6 5 10 15 20 25 30 35 40 45 50 55 6 to 10, characterized in that the hollow body profile is filled with a thermal and/or acoustic material, preferably with plastic foam, most preferably with polyurethane, before deposition of the PTFE solvent dispersion. 12. Apparatus for producing a roller shutter slat (1) from a coated aluminum strip, comprising - a heating device (5) for heating up the coated aluminum strip, preferably by infrared radiation, - acooling device (6) for cooling downthe coated aluminum strip directly after heating, - a profiling unit (7) comprising a plurality of roll- ers (8) for roll-forming the coated aluminum strip into a hollow body profile having a male upper end (2) and a female lower end (3) and - a spraying device (9) for depositing of a PTFE solvent dispersion on at least one end (2, 3), preferablythe female lower end (3), of thehollow body profile. 13. Apparatus according to claim 12, characterized by a filling device (10) for filling the hollow body profile with a thermal and/or acoustic insulation material, preferably with plastic foam, most preferably with polyurethane, whereby the fill- ing device (10) is arranged between the profiling unit (7) and the spraying device (9). 14. Apparatus according to claim 12 or 13, characterized by a further heating device (11) for heating up the hollow body profile and/or an evapo- rating unit (12) arranged after the spraying device (9). 15. Apparatus according to any one of the preceding claims 12 to 14, characterized in that it allows continuous produc- tion of a plurality of roller shutter slats (1). Patentansprüche 1. Rollladenleiste(1), die auseinem beschichteten Alu- miniumstreifen zu einem Hohlkörperprofil mit einem männlichen Oberende (2) und einem weiblichen Un- terende (3) zur Ineingriffnahme mit einer oder mehr anderen Leisten (1) gewalzt ist, dadurch gekennzeichnet, dass zumindest ein En- de (2, 3), vorzugsweise das weibliche Unterende (3), des Hohlkörperprofils eine Beschichtung (4) um- fasst, die auf einer PTFE-Lösungsmitteldispersion basiert. 2. Rollladenleiste nach Anspruch 1, dadurch gekennzeichnet, dass sich die Beschich- tung (4) über ein nach innen gebogenes Teil (5) des weiblichen Unterendes (3) des Hohlkörperprofils ausdehnt. 3. Rollladenleiste nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Beschichtung (4) eine Stärke von 5 mm bis 20 mm, vorzugsweise 7 mm bis 15 mm, aufweist. 4. Rollladenleiste nach einem der vorhergehenden An- sprüche, dadurch gekennzeichnet, dass das Hohlkörper- profil mit einem Wärme- und/oder Geräuschdäm- mungsmaterial gefüllt ist, vorzugsweise mit Kunst- stoffschaummaterial, insbesondere bevorzugt mit Polyurethan. 5. Rollladen zum Sonnenschutz, umfassend zumin- dest zwei Leisten (1) gemäß einem der vorherge- henden Ansprüche, wobei die Leisten derart vertikal beweglich sind, dass in einer geschlossenen Positi- on ein männliches Oberende (2) einer ersten Leiste (1) mit einem weiblichenUnterende (3) einer zweiten Leiste (1) in Eingriff tritt. 6. Verfahren zum Erzeugen einer Rollladenleiste (1) aus einem beschichteten Aluminiumstreifen, folgen- de Schritte umfassend: - Walzen des beschichteten Aluminiumstreifens zu einem Hohlkörperprofil mit einem männli- chen Oberende (2) und einem weiblichen Un- terende (3), und - Ablagern einer PTFE-Lösungsmitteldispersion auf zumindest einem Ende (2, 3), vorzugsweise dem weiblichen Unterende (3), des Hohlkörper- profils. 7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass die PTFE-Lö- sungsmitteldispersion durch Sprühen abgelagert wird. 8. Verfahren nach einem der Ansprüche 6 oder 7, dadurch gekennzeichnet, dass der beschichtete Aluminiumstreifen vor dem Walzen und/oder vor dem Aufbringen der PTFE-Lösungsmitteldispersion erhitzt wird, um Wassermoleküle zu beseitigen, die in der Beschichtung des Aluminiumstreifens vorhan- den sind. 9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass der beschichtete Aluminium durch Infrarotbestrahlung auf eine Tem- peratur von 100 bis 250 °C, vorzugsweise 150 bis 200 °C, erhitzt wird. 10. Verfahren nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass der beschichtete 9 10
  7. 7. EP 2 843 177 B1 7 5 10 15 20 25 30 35 40 45 50 55 Aluminiumstreifen direkt nach dem Erhitzen auf eine Temperatur von 10 bis 60 °C, vorzugsweise 20 bis 40 °C, abgekühlt wird. 11. Verfahren nach einem der vorhergehenden Ansprü- che 6 bis 10, dadurch gekennzeichnet, dass das Hohlkörper- profil vor der Ablagerung der PTFE-Lösungsmittel- dispersion mit einem Wärme- und/oder Geräusch- dämmungsmaterial, vorzugsweise mit Kunststoff- schaum, insbesondere bevorzugt mit Polyurethan, gefüllt wird. 12. Vorrichtung zum Erzeugen einer Rollladenleiste (1) aus einem beschichteten Aluminiumstreifen, umfas- send: - ein Heizgerät (5) zum Erhitzen des beschich- teten Aluminiumstreifens, vorzugsweise durch Infrarotbestrahlung, - ein Kühlgerät (6) zum Abkühlen des beschich- teten Aluminiumstreifens direkt nach dem Erhit- zen, - eine Profiliereinheit (7), umfassend mehrere Walzen (8) zum Walzen des beschichteten Alu- miniumstreifens zu einem Hohlkörperprofil mit einem männlichen Oberende (2) und einem weiblichen Unterende (3), und - ein Sprühgerät (9) zum Ablagern einer PTFE- Lösungsmitteldispersion auf zumindest einem Ende (2, 3), vorzugsweise dem weiblichen Un- terende (3), des Hohlkörperprofils. 13. Vorrichtung nach Anspruch 12, gekennzeichnet durch ein Füllgerät (10) zum Fül- len des Hohlkörperprofils mit einem Wärme- und/oder Geräuschdämmungsmaterial, vorzugs- weise mit Kunststoffschaum, insbesondere bevor- zugt mit Polyurethan, wobei das Füllgerät (10) zwi- schen der Profiliereinheit (7) und dem Sprühgerät (9) angeordnet ist. 14. Vorrichtung nach einem der Ansprüche 12 oder 13, gekennzeichnet durch ein weiteres Heizgerät (11) zum Erhitzen des Hohlkörperprofils und/oder eine Verdampfungseinheit (12), die nach dem Sprühge- rät (9) angeordnet ist. 15. Vorrichtung nach einem der vorhergehenden An- sprüche 12 bis 14, dadurch gekennzeichnet, dass sie die fortlaufen- de Produktion von mehreren Rollladenleisten (1) er- möglicht. Revendications 1. Lamelle de volet roulant (1) profilée à partir d’une bande d’aluminium enrobée en un profilé à corps creux présentant une extrémité supérieure mâle (2) et une extrémité inférieure femelle (3) destinées à s’engager avec une ou plusieurs autre (s) lamelle(s) (1), caractérisée en ce qu’au moins une extrémité (2, 3), de préférence l’extrémité inférieure femelle (3), du profilé à corps creux comprend un revêtement (4) à base d’une dispersion de solvant PTFE. 2. Lamelle de volet roulant selon la revendication 1, caractérisée en ce que le revêtement (4) s’étend à travers une partie courbée vers l’intérieur (5) de l’ex- trémité inférieure femelle (3) du profilé à corps creux. 3. Lamelle de volet roulant selon la revendication 1 ou 2, caractérisée en ce que le revêtement (4) présente une épaisseur de 5 mm à 20 mm, de préférence de 7 mm à 15 mm. 4. Lamelle de volet roulant selon l’une des revendica- tions précédentes, caractérisée en ce que le profilé à corps creux est rempli avec un matériau d’isolation thermique et/ou sonore, de préférence avec une mousse plastique, et mieux, avec du polyuréthane. 5. Volet roulant pour la protection solaire, comprenant au moins deux lamelles (1) selon l’une des revendi- cations précédentes, dans lequel les lamelles sont déplaçables verticalement, de manière à ce que dans une position fermée, une extrémité supérieure mâle (2) d’une première lamelle (1) s’engage avec une extrémité inférieure femelle (3) d’une deuxième lamelle (1). 6. Procédé pour la production d’une lamelle de volet roulant (1) à partie d’une bande d’aluminium enro- bée, comprenant les étapes suivantes : - profilage de la bande d’aluminium enrobée en un profilé à corps creux présentant une extré- mité supérieure mâle (2) et une extrémité infé- rieure femelle (3), et - dépôt d’une dispersion de solvant PTFE sur au moins une extrémité (2, 3), de préférence sur l’extrémité inférieure femelle (3) du profilé à corps creux. 7. Procédé selon la revendication 6, caractérisé en ce que la dispersion de solvant PT- FE est déposée par pulvérisation. 8. Procédé selon la revendication 6 ou 7, caractérisé en ce que la bande d’aluminium enro- bée est chauffée avant le profilage et/ou avant l’ap- plication de la dispersion de solvant PTFE, afin d’éli- 11 12
  8. 8. EP 2 843 177 B1 8 5 10 15 20 25 30 35 40 45 50 55 miner les molécules d’eau présentes dans le revê- tement de la bande d’aluminium. 9. Procédé selon la revendication 8, caractérisé en ce que la bande d’aluminium enro- bée est chauffée par radiation infrarouge, à une tem- pérature de 100 à 250°C, de préférence de 150 à 200°C. 10. Procédé selon la revendication 8 ou 9, caractérisé en ce que la bande d’aluminium enro- bée est refroidie à une température de 10 à 60°C, de préférence de 20 à 40°C, directement après le chauffage. 11. Procédé selon l’une quelconque des revendications précédentes 6 à 10, caractérisé en ce que le profilé à corps creux est rempli avec un matériau d’isolation thermique et/ou sonore, de préférence avec une mousse plastique, et mieux, avec du polyuréthane, avant le dépôt de la dispersion de solvant PTFE. 12. Appareil pour la production d’une lamelle de volet roulant (1) à partir d’une bande d’aluminium enro- bée, comprenant - un dispositif de chauffage (5) pour chauffer la bande d’aluminium enrobée, de préférence par radiation infrarouge, - un dispositif de refroidissement (6) pour refroi- dir la bande d’aluminium enrobée directement après le chauffage, - une unité de profilage (7) comprenant une plu- ralité derouleaux (8) pour profiler la bande d’alu- minium enrobée en un profilé à corps creux pré- sentant uneextrémitésupérieuremâle(2)et une extrémité inférieure femelle (3), et - un dispositif de pulvérisation (9) pour déposer une dispersion de solvant PTFE sur au moins une extrémité (2, 3), de préférence sur l’extré- mité inférieure femelle (3) du profilé à corps creux. 13. Appareil selon la revendication 12, caractérisé par un dispositif de remplissage (10) pour remplir le profilé à corps creux avec un matériau d’isolation thermique et/ou sonore, de préférence avec une mousse plastique, et mieux, avec du po- lyuréthane, le dispositif de remplissage (10) étant agencé entre l’unité de profilage (7) et le dispositif de pulvérisation (9). 14. Appareil selon la revendication 12 ou 13, caractérisé par un dispositif de chauffage supplé- mentaire (11) pour chauffer le profilé à corps creux, et/ou une unité d’évaporation (12) agencée en aval du dispositif de pulvérisation (9). 15. Appareil selon l’une quelconque des revendications précédentes 12 à 14, caractérisé en ce qu’il permet une production con- tinue d’une pluralité de lamelles de volet roulant (1). 13 14
  9. 9. EP 2 843 177 B1 9
  10. 10. EP 2 843 177 B1 10
  11. 11. EP 2 843 177 B1 11
  12. 12. EP 2 843 177 B1 12 REFERENCES CITED IN THE DESCRIPTION This list of references cited by the applicant is for the reader’s convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard. Patent documents cited in the description • EP 0365908 A1 [0004] • DE 3305677 A1 [0005] • EP 0806541 A2 [0006] • JP 2009228286 A [0007] • FR 2857563 A1 [0008]

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