EP2449200A1 - Improved window blind - Google Patents

Improved window blind

Info

Publication number
EP2449200A1
EP2449200A1 EP10747676A EP10747676A EP2449200A1 EP 2449200 A1 EP2449200 A1 EP 2449200A1 EP 10747676 A EP10747676 A EP 10747676A EP 10747676 A EP10747676 A EP 10747676A EP 2449200 A1 EP2449200 A1 EP 2449200A1
Authority
EP
European Patent Office
Prior art keywords
slats
shutter
roller shutter
main
shutters
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10747676A
Other languages
German (de)
French (fr)
Inventor
Ovad Haver
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alu Oz Ltd
Original Assignee
Alu Oz Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alu Oz Ltd filed Critical Alu Oz Ltd
Publication of EP2449200A1 publication Critical patent/EP2449200A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
    • E06B9/08—Roll-type closures
    • E06B9/11—Roller shutters
    • E06B9/15—Roller shutters with closing members formed of slats or the like
    • E06B9/165—Roller shutters with closing members formed of slats or the like with slats disappearing in each other; with slats the distance between which can be altered
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
    • E06B9/08—Roll-type closures
    • E06B9/11—Roller shutters
    • E06B9/15—Roller shutters with closing members formed of slats or the like
    • E06B2009/1533—Slat connections
    • E06B2009/1538—Slats directly connected
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
    • E06B9/08—Roll-type closures
    • E06B9/11—Roller shutters
    • E06B9/17—Parts or details of roller shutters, e.g. suspension devices, shutter boxes, wicket doors, ventilation openings
    • E06B2009/17069—Insulation
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
    • E06B9/08—Roll-type closures
    • E06B9/11—Roller shutters
    • E06B9/17—Parts or details of roller shutters, e.g. suspension devices, shutter boxes, wicket doors, ventilation openings
    • E06B2009/17092—Manufacturing

Definitions

  • the present invention relates to a roller shutter with more than one 'closed' configuration, which allow variable levels of light to pass.
  • the roller shutter is a type of wall consisting of many horizontal slats attached by hinges. Due to these hinges the shutter may be drawn along a curve and out of the way, as in a garage door, or rolled into a spiral within a pelmet box, as in some window blinds. Roller shutters allowing some degree of variation in the light transmission in the nominally 'closed' state enjoy the advantage of not having to be rolled out of the way to allow some light in. It is the aim of the present invention to provide an improvement upon such a device.
  • US patent 6371189 to Azoulai provides a roller shutter for a window or doorway wall opening, comprising a plurality of elongate slats coupled together to form a slat assembly, and a winding device overlying the slat assembly for winding and unwinding the slat assembly to a fully-closed position, a fully-opened position, and a partially-opened position with respect to the wall opening.
  • the slats are coupled together by flexible coupling links coupled between adjacent slats at both ends of the slats, which permit each slat, when in a fully-opened or partially-opened position with respect to the wall opening, to move linearly away from an adjacent slat in the slat assembly to create a light and air space between the adjacent slats and linearly towards the adjacent slat in the slat assembly to close or restrict the light and air spaces, and angularly with respect to the adjacent slat in the slat assembly to enable the slat assembly to be wound onto or unwound from the winding device. It will be noted (see e.g. Fig.
  • Each slat comprises a rotating shaft mounted on the connection elements and an interlocking shaft provided in a position different from that of the rotating shaft, both of which are provided on the respective side faces thereof.
  • One end portion of the interlocking shaft is fitted into a guide groove provided in a guide bar so that as the guide bar moves the angle of inclination of slat varies. Therefore, a shutter is rolled up and its storage space is reduced, and the amounts of airflow and light can be adjusted by varying the angle of inclination of the slats.
  • Fig. 1 presents prior art
  • Fig. 2 presents a side view of the improved shutters of the current invention in its completely closed state
  • Fig. 3 presents a side and front view of the improved shutters of the current invention in a partially closed state
  • Fig. 4 presents a graph of heat flux vs. temperature difference across a shutter of the current invention, illustrating a relatively large heat insulation value.
  • the present invention comprises an improved roller shutter with provision for variable light and air penetration, improved strength, and decreased weight.
  • an improved roller shutter comprising a plurality of largely rectangular, hollow main slats slidably hinged on their long edges to largely rectangular perforated connecting slats, said main slats having cavities within them adapted to contain said connecting slats when said roller shutter is in a completely closed state, and said connecting slats containing a plurality of perforations that are exposed when said roller shutter is in a partially open state, thereby allowing light and air to penetrate said connecting slats when said roller shutter is partially opened.
  • roller shutter wherein said hollow main slats are filled with an expanding foam selected from a group consisting of: polyurethane foam, isocyanate foam, and silane terminated polymer foam.
  • roller shutter wherein said main slats and said connecting slats are produced by roll forming. It is further within provision of the invention to provide the aforementioned roller shutter wherein said main slats and said connecting slats are composed of material selected from a group consisting of: aluminum, steel, bronze, wood, titanium, iron, plastic.
  • the open area of the shutters range from at least 20% of the entire shutter area when in the completely open state to 0% of the entire shutter area when in the completely closed state.
  • roller shutters comprising steps of : a. roll-forming single-walled connecting slats (202) having hinges
  • slats are provided for roller shutters in the form shown in Fig. 2.
  • the slats are of two varieties, these being main slats 201,203 and connecting slats 202.
  • the main slats are roughly speaking hollow rectangular prisms, with long side (for example) about 1.5m, short side (for example) about 4cm, and thickness (for example) about lcm.
  • the main slats have voids within them adapted to contain the connecting slats when the shutters are closed completely; this configuration is shown in Fig. 2 in cross section.
  • the connecting slats 202 are pulled out of the main slats 201,203 as shown in Fig. 3b in cross section.
  • Holes 204 shown in the front view of Fig. 3a
  • the main slats are connected to the conectig slats by means of hinge-like mechanisms 209,210 on the main slats and corresponding hinge 207,208 on the connecting slats.
  • the connecting slat hinge 207 disengages from the main slat hinge 210 when the device is closed as in Fig. 2. It will be noted that the connecting slats attach to the main slats along their entire respective lengths, along the long side. Therefore the strength of connection between connecting and main slats will be correspondingly substantial. It will also be noted by those skilled in the art that in the completely closed state (Fig. 2), there will always be at least two walls blocking any heat or force transfer from one side of the shutter to the other, in addition to the insulation value of a filler used to fill the hollow slats. Thus there will be a correspondingly resistance to transfer of heat/cold (high R-value) and high strength.
  • the interior cavities 205 of the main slats be filled with a heat insulating and strengthening element such as polyurethane foam.
  • foam can be obtained in a form that expands upon contact with air, allowing for easy filling of voids such as the cavities 205 by filling from the open sides of the main slats.
  • the 'completely closed state' is characterized by the connecting slats being completely pushed within the main slats with main slats touching one another, as shown in Fig. 2. It should also be understood that in a 'open state' the connecting slats are not completely contained within the main slats, and the main slats are not touching one another, as in Fig. 3. In a 'partially open state' these statements are also true; in a 'completely open state' the connecting slats are completely exposed as in Fig. 3, such that further drawing of the shutter will cause movement of all the slats from their rest positions as a whole. The state of the shutter when the slats have been completely withdrawn and rolled into a containing box or to the ceiling of a garage, for instance, will be called the 'withdrawn state'.
  • Fig. 5 a perspective view of a main slat prototype is shown.
  • Figs. 6,7 a roll forming assembly is shown that is capable ofproducing the prototype of Fig. 5 at a rate of several meters per second.
  • the open area of the shutters when in the completely open state be approximately 20% of the entire shutter area, while the open area ot the shutters when in the completely closed state be approximately Wo oi the entire shutter area.
  • the wall thickness of the slats may be thinner than the standard slat wall thickness, an advance allowed by the use of the polyurethane void filling described above.
  • Wall thicknesses of about 0.3mm have been used in prototypes produced by roll-forming. Due to this decreased wall thickness a decrease in the relatively expensive wall material (typically aluminum) is effected.
  • the diameter of a rolled window-shutter according to the current invention will be substantially smaller than other designs, for example reaching approximately 30cm roll diameter for a 4m length shutter.
  • the heat insulation of the device be greater than 0.37 K m /W, a relatively high value considering the small wall thickness of the aluminum used; the large thickness of polyurethane foam ensures the high heat resistance value obtained.
  • Fig. 4 where the total heat flux across a shutter is shown as a function of external temperature, where the internal temperature is kept at 0°C (273°K). As the external temperature is increased a linear relation is obtained for the heat flux in W/m 2 , allowing one to use a standard R-value as defined by:
  • Q is the total heat flux in W/m 2
  • R the insulation value in K m 2 /W
  • T the temperature difference across the device in °K.
  • This value computed by finite element simulation using the ⁇ 12mm thickness of the device and 0.3mm wall thickness, compares favorably with a value of 0.18 K m 2 /W for 2.5cm thick wood chips or 0.38 K m 2 /W for 2.5cm thickness of vermiculite.
  • the device may be entirely produced by means of roll-forming as opposed to extrusion as is the practice currently. This constitutes an important improvement over the current state of the art since roll-forming is less energy intensive and less expensive than extrusion for aluminum although the initial tooling may be more expensive [Roll-Forming Handbook, George Halmos p. 12-2, CRC Press 2006].
  • the slats of the current invention Due to the 0.3mm wall thickness of aluminum used in the slats of the current invention, it is estimated that in the closed state a single slat will weigh 152g/m, and the connecting slat 73g/m. When closed, the slats are estimated to weigh about 4.6 kg/m 2 of slat area.
  • roller shutters of the current invention may be found suitable as storm shutters.
  • Suitability for such applications has been defined by various standards such as UL 2218, for Class 4 wind resistance.
  • UL 2218 for Class 4 wind resistance.

Abstract

An improved roller shutter comprising a plurality of largely rectangular, hollow main slats slidably hinged on their long edges to largely rectangular perforated connecting slats, said main slats having cavities within them adapted to contain said connecting slats when said roller shutter is in a completely closed state, and said connecting slats containing a plurality of perforations that are exposed when said roller shutter is in a partially open state, thereby allowing light and air to penetrate said connecting slats when said roller shutter is partially opened.

Description

Improved Window Blind
FIELD OF THE INVENTION
The present invention relates to a roller shutter with more than one 'closed' configuration, which allow variable levels of light to pass.
BACKGROUND OF THE INVENTION
The roller shutter is a type of wall consisting of many horizontal slats attached by hinges. Due to these hinges the shutter may be drawn along a curve and out of the way, as in a garage door, or rolled into a spiral within a pelmet box, as in some window blinds. Roller shutters allowing some degree of variation in the light transmission in the nominally 'closed' state enjoy the advantage of not having to be rolled out of the way to allow some light in. It is the aim of the present invention to provide an improvement upon such a device.
US patent 6371189 to Azoulai provides a roller shutter for a window or doorway wall opening, comprising a plurality of elongate slats coupled together to form a slat assembly, and a winding device overlying the slat assembly for winding and unwinding the slat assembly to a fully-closed position, a fully-opened position, and a partially-opened position with respect to the wall opening. The slats are coupled together by flexible coupling links coupled between adjacent slats at both ends of the slats, which permit each slat, when in a fully-opened or partially-opened position with respect to the wall opening, to move linearly away from an adjacent slat in the slat assembly to create a light and air space between the adjacent slats and linearly towards the adjacent slat in the slat assembly to close or restrict the light and air spaces, and angularly with respect to the adjacent slat in the slat assembly to enable the slat assembly to be wound onto or unwound from the winding device. It will be noted (see e.g. Fig. 1) that when not in a completely closed state, the attachment of one member to the next depends entirely upon two cable-like connecting elements (15). It will be appreciated that the strength of such a structure in an open position (such as that of Fig. 1) is largely dependent upon the strength of the cable elements 15. This cable strength will be necessarily limited by the small cross sectional area thereof. Similarly Japanese patent application 06108755 A2 provides a roller shutter adapted to adjust the amounts of airflow and light over a wide range and to enclose a roller shutter in small storage space. Several connectors each comprise connection elements rotatably connected to one another and arranged in series. The connectors are wound to both end portions of a roller and a slat is suspended between the connection elements of each connector. Each slat comprises a rotating shaft mounted on the connection elements and an interlocking shaft provided in a position different from that of the rotating shaft, both of which are provided on the respective side faces thereof. One end portion of the interlocking shaft is fitted into a guide groove provided in a guide bar so that as the guide bar moves the angle of inclination of slat varies. Therefore, a shutter is rolled up and its storage space is reduced, and the amounts of airflow and light can be adjusted by varying the angle of inclination of the slats. It will be appreciated by one skilled in the art that this device, combining elements of window blinds (rotating slats) with that of roller shutters, will also rely on the connector strength for the ultimate shutter strength when in partially opened configurations, and that inclusion of a rotating mechanism will necessarily weaken the force of retention of the slats within the device.
Hence, an improved roller shutter with variable light and air transmission is still a long felt need.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to understand the invention and to see how it may be implemented in practice, a plurality of embodiments will now be described, by way of non-limiting example only, with reference to the accompanying drawings, in which
Fig. 1 presents prior art;
Fig. 2 presents a side view of the improved shutters of the current invention in its completely closed state;
Fig. 3 presents a side and front view of the improved shutters of the current invention in a partially closed state; Fig. 4 presents a graph of heat flux vs. temperature difference across a shutter of the current invention, illustrating a relatively large heat insulation value.
SUMMARY OF THE INVENTION
The present invention comprises an improved roller shutter with provision for variable light and air penetration, improved strength, and decreased weight.
It is within the core of the present invention to provide an improved roller shutter comprising a plurality of largely rectangular, hollow main slats slidably hinged on their long edges to largely rectangular perforated connecting slats, said main slats having cavities within them adapted to contain said connecting slats when said roller shutter is in a completely closed state, and said connecting slats containing a plurality of perforations that are exposed when said roller shutter is in a partially open state, thereby allowing light and air to penetrate said connecting slats when said roller shutter is partially opened.
It is further within provision of the invention to provide the aforementioned roller shutter wherein said hollow main slats are filled with an expanding foam selected from a group consisting of: polyurethane foam, isocyanate foam, and silane terminated polymer foam.
It is further within provision of the invention to provide the aforementioned roller shutter wherein said main slats and said connecting slats have wall thicknesses of about 0.3mm.
It is further within provision of the invention to provide the aforementioned roller shutter wherein the R- value of insulation provided by said shutter is greater than 0.37 °K m2/W.
It is further within provision of the invention to provide the aforementioned roller shutter wherein said main slats and said connecting slats are produced by roll forming. It is further within provision of the invention to provide the aforementioned roller shutter wherein said main slats and said connecting slats are composed of material selected from a group consisting of: aluminum, steel, bronze, wood, titanium, iron, plastic.
It is further within provision of the invention to provide the aforementioned roller shutter wherein said shutter has an elastic modulus of at least 130 GPa.
It is further within provision of the invention to provide the aforementioned roller shutter wherein said shutter has a weight of at most 4.6kg/m2 when closed.
It is further within provision of the invention to provide the aforementioned roller shutter wherein said shutters meet or exceed the ASTM E 1996 Standard
Specification.
It is further within provision of the invention to provide the aforementioned roller shutter wherein the open area of the shutters range from at least 20% of the entire shutter area when in the completely open state to 0% of the entire shutter area when in the completely closed state.
It is further within provision of the invention to provide a method for production of roller shutters comprising steps of : a. roll-forming single-walled connecting slats (202) having hinges
(207),(208) ;
b. roll-forming hollow main slats (201) having hinges (209),(210) and a recess adapted for containing said connecting slats (202); c. filling said hollow main slats with insulating material;
d. attaching a series of such main slats and connecting slats to form a planar shutter.
While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that it is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The following description is provided, alongside all chapters of the present invention, so as to enable any person skilled in the art to make use of said invention and sets forth the best modes contemplated by the inventor of carrying out this invention.
Various modifications, however, will remain apparent to those skilled in the art, since the generic principles of the present invention have been defined specifically to provide a means and method for providing a wood-resin composite.
In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present invention.
However, those skilled in the art will understand that such embodiments may be practiced without these specific details. Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention.
The term 'plurality' refers hereinafter to any positive integer e.g, 1,5, or 10.
Amongst the novel elements of the roller shutter herein described, chief is the use of two different slats, these being hollow double-walled 'main slats' and single-walled 'connecting slats', which are arranged in an alternating 'A-B-A-B...' fashion.
According to a preferred embodiment of the present invention, slats are provided for roller shutters in the form shown in Fig. 2. The slats are of two varieties, these being main slats 201,203 and connecting slats 202. The main slats are roughly speaking hollow rectangular prisms, with long side (for example) about 1.5m, short side (for example) about 4cm, and thickness (for example) about lcm. The main slats have voids within them adapted to contain the connecting slats when the shutters are closed completely; this configuration is shown in Fig. 2 in cross section. As the shutters are opened, the connecting slats 202 are pulled out of the main slats 201,203 as shown in Fig. 3b in cross section. Thus the connecting slats are now exposed. Holes 204 (shown in the front view of Fig. 3a) within the connecting slats allow light and air to pass through the shutter, when partially opened, to a degree dependent on the degree to which the connecting slats are exposed. The main slats are connected to the conectig slats by means of hinge-like mechanisms 209,210 on the main slats and corresponding hinge 207,208 on the connecting slats. The connecting slat hinge 207 disengages from the main slat hinge 210 when the device is closed as in Fig. 2. It will be noted that the connecting slats attach to the main slats along their entire respective lengths, along the long side. Therefore the strength of connection between connecting and main slats will be correspondingly substantial. It will also be noted by those skilled in the art that in the completely closed state (Fig. 2), there will always be at least two walls blocking any heat or force transfer from one side of the shutter to the other, in addition to the insulation value of a filler used to fill the hollow slats. Thus there will be a correspondingly resistance to transfer of heat/cold (high R-value) and high strength. It is within provision of the invention that the interior cavities 205 of the main slats be filled with a heat insulating and strengthening element such as polyurethane foam. Such foam can be obtained in a form that expands upon contact with air, allowing for easy filling of voids such as the cavities 205 by filling from the open sides of the main slats.
It should be understood that the 'completely closed state' is characterized by the connecting slats being completely pushed within the main slats with main slats touching one another, as shown in Fig. 2. It should also be understood that in a 'open state' the connecting slats are not completely contained within the main slats, and the main slats are not touching one another, as in Fig. 3. In a 'partially open state' these statements are also true; in a 'completely open state' the connecting slats are completely exposed as in Fig. 3, such that further drawing of the shutter will cause movement of all the slats from their rest positions as a whole. The state of the shutter when the slats have been completely withdrawn and rolled into a containing box or to the ceiling of a garage, for instance, will be called the 'withdrawn state'.
In Fig. 5 a perspective view of a main slat prototype is shown. In Figs. 6,7 a roll forming assembly is shown that is capable ofproducing the prototype of Fig. 5 at a rate of several meters per second.
It is within provision of the invention that the open area of the shutters when in the completely open state be approximately 20% of the entire shutter area, while the open area ot the shutters when in the completely closed state be approximately Wo oi the entire shutter area.
It is within provision of the invention that the wall thickness of the slats may be thinner than the standard slat wall thickness, an advance allowed by the use of the polyurethane void filling described above. Wall thicknesses of about 0.3mm have been used in prototypes produced by roll-forming. Due to this decreased wall thickness a decrease in the relatively expensive wall material (typically aluminum) is effected. Furthermore due to the smaller sizes of components involved and decreased total shutter thickness, the diameter of a rolled window-shutter according to the current invention will be substantially smaller than other designs, for example reaching approximately 30cm roll diameter for a 4m length shutter.
It is further within provision of the invention that the heat insulation of the device be greater than 0.37 K m /W, a relatively high value considering the small wall thickness of the aluminum used; the large thickness of polyurethane foam ensures the high heat resistance value obtained. This is illustrated in Fig. 4 where the total heat flux across a shutter is shown as a function of external temperature, where the internal temperature is kept at 0°C (273°K). As the external temperature is increased a linear relation is obtained for the heat flux in W/m2, allowing one to use a standard R-value as defined by:
Q = ^
* R
where Q is the total heat flux in W/m2, R the insulation value in K m2/W, and T the temperature difference across the device in °K. This value, computed by finite element simulation using the ~12mm thickness of the device and 0.3mm wall thickness, compares favorably with a value of 0.18 K m2/W for 2.5cm thick wood chips or 0.38 K m2/W for 2.5cm thickness of vermiculite.
It is further within provision of the invention that it provide, when completely closed, wind resistance against winds of up to lOOk/h. It is also within provision of the invention that a class 500 fire-resistance rating be provided by the shutter of the current invention, when completely closed.
It is further within provision of the invention that due to the thin walls of the slats, alternative techniques may be used to form them. In particular, the device may be entirely produced by means of roll-forming as opposed to extrusion as is the practice currently. This constitutes an important improvement over the current state of the art since roll-forming is less energy intensive and less expensive than extrusion for aluminum although the initial tooling may be more expensive [Roll-Forming Handbook, George Halmos p. 12-2, CRC Press 2006].
Due to the 0.3mm wall thickness of aluminum used in the slats of the current invention, it is estimated that in the closed state a single slat will weigh 152g/m, and the connecting slat 73g/m. When closed, the slats are estimated to weigh about 4.6 kg/m2 of slat area.
Due to the unique sandwich construction of the current device, an appreciably high modulus of elasticity is reached. It is calculated using finite element simulations that the slate of the current invention when closed achieve an elastic modulus of approximate 130 GPa.
As a result of this relatively high modulus, the roller shutters of the current invention may be found suitable as storm shutters. Suitability for such applications has been defined by various standards such as UL 2218, for Class 4 wind resistance. The ASTM El 996 Standard Specification for Performance of Exterior Windows, Glazed Curtain Walls, Doors and Storm Shutters Impacted by Wind-borne Debris in
Hurricanes defines a two-part standard, one for impact resistance and one for Design Pressure Rating (both negative and positive). It is within provision of the current invention that the shutters herein disclosed meet or exceed the ASTM E 1996 Standard Specification. Furthermore it is within provision of the invention that they be suitable for use in Class D wind zones (up to 90 mph).

Claims

1. An improved roller shutter comprising a plurality of largely rectangular, hollow main slats slidably hinged on their long edges to largely rectangular perforated connecting slats, said main slats having cavities within them adapted to contain said connecting slats when said roller shutter is in a completely closed state, and said connecting slats containing a plurality of perforations that are exposed when said roller shutter is in a partially open state, thereby allowing light and air to penetrate said connecting slats when said roller shutter is partially opened.
2. The roller shutter of claim 1 wherein said hollow main slats are filled with an expanding foam selected from a group consisting of: polyurethane foam, isocyanate foam, and silane terminated polymer foam.
3. The roller shutter of claim 1 wherein said main slats and said connecting slats have wall thicknesses of about 0.3mm.
4. The roller shutter of claim 1, 2, or 3 wherein the R- value of insulation
provided by said shutter is greater than 0.37 K m /W.
5. The roller shutter of claim 1 wherein said main slats and said connecting slats are produced by roll forming.
6. The roller shutter of claim 1 wherein said main slats and said connecting slats are composed of material selected from a group consisting of: aluminum, steel, bronze, wood, titanium, iron, plastic.
7. The roller shutter of claim 1 wherein said shutter has an elastic modulus of at least 130 GPa.
8. The roller shutter of claim 1 wherein said shutter has a weight of at most 4.6kg/m2 when closed.
9. The roller shutter of claim 1 wherein said shutters meet or exceed the ASTM El 996 Standard Specification.
10. The roller shutter of claim 1 wherein the open area of the shutters range from at least 20% of the entire shutter area when in the completely open state to 0% of the entire shutter area when in the completely closed state.
11. A method for production of roller shutters comprising steps of : e. roll-forming single-walled connecting slats (202) having hinges
(207),(208) ;
f. roll-forming hollow main slats (201 ) having hinges (209),(210) and a recess adapted for containing said connecting slats (202);
g. filling said hollow main slats with insulating material;
h. attaching a series of such main slats and connecting slats to form a planar shutter.
12. The method of claim 11 wherein said hollow main slats are filled with an
expanding foam selected from a group consisting of: polyurethane foam, isocyanate foam, and silane terminated polymer foam.
13. The method of claim 11 wherein said main slats and said connecting slats have wall thicknesses of about 0.3mm.
14. The method of claim 11 wherein the R- value of insulation provided by said shutter is greater than 0.37 °K m2/W.
15. The roller shutter of claim 1 wherein said main slats and said connecting slats are produced by roll forming.
16. The method of claim 11 wherein said main slats and said connecting slats are composed of material selected from a group consisting of: aluminum, steel, bronze, wood, titanium, iron, plastic.
17. The method of claim 11 wherein said shutter has an elastic modulus of at least 130 GPa.
18. The method of claim 11 wherein said shutter has a weight of at most 4.6kg/m2 when closed.
19. The method of claim 11 wherein said shutters meet or exceed the ASTM
E 1996 Standard Specification.
20. The method of claim 11 wherein the open area of the shutters range from at least 20% of the entire shutter area when in the completely open state to 0% of the entire shutter area when in the completely closed state.
EP10747676A 2009-06-29 2010-06-27 Improved window blind Withdrawn EP2449200A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL19962009 2009-06-29
PCT/IL2010/000513 WO2011001426A1 (en) 2009-06-29 2010-06-27 Improved window blind

Publications (1)

Publication Number Publication Date
EP2449200A1 true EP2449200A1 (en) 2012-05-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10747676A Withdrawn EP2449200A1 (en) 2009-06-29 2010-06-27 Improved window blind

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EP (1) EP2449200A1 (en)
WO (1) WO2011001426A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2297987A1 (en) * 1975-01-17 1976-08-13 Griesser Sa Slat for roller shutter blind - formed of two convex metal sections joined on longitudinal edges and having perforations for ventilation
US4416047A (en) * 1981-10-02 1983-11-22 Tuerenwerke Riexinger Gmbh & Co., Kg Method of manufacturing a shutter link
JPH06108755A (en) 1992-09-25 1994-04-19 Matsushita Electric Works Ltd Roller shutter
IL132655A0 (en) * 1999-10-31 2001-03-19 G H R D N Marketing & Man Ltd Blinds with variable internal openings
DE20009630U1 (en) * 2000-05-29 2000-08-24 Rau Metall Gmbh & Co Roller shutters with a pull-out light wall
IL137432A0 (en) 2000-07-21 2001-07-24 Kol Chen Ltd Roller shutter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011001426A1 *

Also Published As

Publication number Publication date
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