KR101972362B1 - Blind with two blind head rail - Google Patents

Abstract

A blind having a head rail 12 having upper and lower regions is provided on the upper blind roller 30, the lower blind attachment 32, the upper blind 18 on the upper blind roller 30, A lower blind (16), upper and lower blind control mechanisms (62, 64), the upper blind (18) being operable to hang down by a predetermined side of the lower blind attachment (32) 16 are suspended from the side of the upper blind 18 but spaced apart therefrom to provide a head rail having a slim and aesthetically pleasing profile.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a blind with two blind head rails,

The present invention relates to a window blind with at least two separate panels of blind material that can be hung one after the other or one by one. The panels can be adjusted for a variety of shade effects and can provide substantially complete black out if needed or can be aligned with the head rails.

In the past, conventional window blinds were typically Venetian style blinds with horizontal strips, or so-called vertical blinds. Such a blind could have a mechanism that could rotate the strips between closed and open positions. However, at the open position where light passes through the room, there was also privacy violation. At the closed position, the light is blocked, but never completely blocked.

Other blinds which are simply made of a panel of thick flexible material wrapped on rollers in the head rail are known. The material can be pulled down to block light for privacy, or it is raised to allow passage of light, but there is privacy loss.

While recent developments in blind design have found that consumers are interested in obtaining blinds with a greater variety of contrast effects, none provide less privacy.

For this purpose, a continuous sheet of blind material may be provided that forms a loop that hangs down double down over the window opening. The sheet is preferably somewhat transparent and is stored on rollers in the head rail. The free end of the sheet is fixed to the head rail, and the other end of the sheet is attached to the roller in the head rail. These materials are optically transmissive, but provide privacy. For example, the material may have alternating bars or strips of somewhat transparent material. When suspended in a loop, the material allows more light to pass through the more transparent bright strip, allowing less light to pass through the less transparent dark strip. By adjusting the loop, it is possible to allow more light into the space.

By recalibrating the loops to register darker strips, it is possible to reduce the light in the space.

The blinds can incorporate weighted bottom rails to keep the hanging loops down. The free pass guide rollers can be integrated into the bottom rail. The loops run freely in the bottom rail around the guide rollers. In this way, the material can also be adjusted or retract straight into the head rail.

In another embodiment, the second blind panel is stored within the headrail and is formed of an opaque indwelling material. When complete light interruption is required, this second panel can be lowered.

In this embodiment, both blind panels are stored in the same head rail on separate rollers.

The design of the blind header, which handles two such panels providing relative motion between one and the other part of the first panel and also provides two rollers for the provision of the second roller for the second panel, Respectively. In the first arrangement, the head rail must be compact and aesthetically pleasing. Preferably, the blind head rail will not occupy space or occupy only slightly more space than previously known blinds at the top of the window opening. The operation of the separate blind panels must be simple and must be able to be operated by means of manual control, or by means of power control in the case of more complex designs, and even by means of remote controlled power control.

The rollers are preferably arranged as upper and lower rollers. Each roller carried a blind panel.

The upper blind on the upper roller is guided around the lower roller and separated from the lower blind on the lower roller.

In the case where the lower blind is a double panel, by means of the weighted bottom rails, the lower blind passes around the free pass guide rollers in the bottom rail. When the lower blind is retracted, the material continues to free-dry around the guide rollers in the bottom rail.

In addition, it is also desirable to provide a control mechanism for the upper roller and a control mechanism for the lower roller in the blind head rail, whereby either or both of the lower and upper panels can be raised or lowered Whereby both the upper panel and the lower panel can be lifted altogether from the window opening so as to leave the window opening open if necessary and without blinds.

The blind control is typically a chain or cords hanging down from the head rail, and controls the rollers.

One of the problems with this code is that some space should be allowed for the code loops to hang near one edge of the blind panels.

This space along one vertical edge of the blind panel then allows some light, and the blind fails to block all light.

Another problem is that when the operator manipulates the code, the edges of the panels are gradually damaged. Therefore, the appearance and the life of the blind are impaired.

Another problem arises from possible friction in the head rail.

Since there are two blind panels on the head rail and two blind panel rollers, it is desirable to guide one blind panel in the path to minimize contact with the other blind panel. Any such contact between the two blind panels can cause friction therebetween when either panel is adjusted.

In some cases, such friction can cause some damage to one or the other of the panels.

In some cases, a certain degree of friction can be inevitable, acceptable in low-cost blinds, or can be reduced by the use of less frictional material.

When the blind has an upper roller with a black out shade, the lower blind is, for example, an accordion corrugated blind, or a venetian or vertical blind, and the lower blind attachment is such that the lower blind is not mounted on the roller Similar problems arise in the case of a form which is lifted by a control code or simply pulled to one side as in the case of a vertical blind.

In order to achieve the prior preferred features, the present invention is directed to an upper blind roller having a head rail which is attachable adjacent a building opening and defines an upper region and a lower region, the upper blind roller being located in an upper region of the head rail, A lower blind roller positioned on a lower region of the head rail, an upper blind stored on the upper blind roller, a lower blind stored on the lower blind roller, an upper blind control mechanism operable to lift the upper blind, And a lower blind control mechanism operable to actuate the blind and to raise and lower the lower blind, wherein the upper blind roller is positioned on an upper axis along an upper plane in the head rail, Subcontractor Wherein the axes are displaced vertically from each other and the upper blind is operable to hang down by a predetermined side of the lower blind roller and the lower blind hangs down beside the upper blind Thereby providing a blind for a building opening that is operable to be spaced from its side thereby providing a headrail having a slim and aesthetically pleasing profile.

The control elements are provided for operating both the lower and upper blinds and guide the elements in the headrail guide so that they hang without the lower and upper blinds. Preferably, the upper blind is an opaque black blind and the lower blind is a translucent blind, whereby when the upper blind is raised and the lower blind is lowered, some light enters and the upper blind is lowered, .

The upper roller is located in the upper region of the head rail, and the lower blind attachment, which may be a linear elongate member, or the lower roller, is located in the lower region of the vertically spaced headrail, depending on the shape of the lower blind.

In one embodiment, the lower blind is a panel formed of a loop of material, and is provided with a lower blind bottom rail having a free passing rail, the loops of the lower blind passing around a free passing roller in the bottom rail.

In one embodiment, the present invention can provide such a blind having a free end fixed to the head rail, and a second end attached to the lower blind roller in the head rail. Transverse blind strips alternating between transparent or transparent strips and less permeable or black strips are formed in the lower blind at spaced intervals throughout the lower blind. The bottom rail provides a mass weight to hold the loops of the lower blind in place.

The blind panel control mechanism on the head rail enables the lower blind to be adjusted so that one part of the loop moves relative to the other. During this adjustment, the blind panel material passes freely around the free pass guide rollers in the bottom rail. In this way, alternating blind strips can be adjusted between the open and closed positions.

Preferably, the free end of the lower panel is affixed within the head rail in place so that the two portions of the blind panel of the loop are kept to a minimum as far as possible.

The attachment wall may be incorporated into the head rail to hold the free end of the lower panel free from contact with the lower blind or the upper blind.

Preferably, the bottom rail has a hollow channel shaped roller housing defining an upward open opening, and a free passage roller located in the housing, the free passage roller having a diameter greater than the width of the channel opening mouth , Thereby locking the roller in the housing.

In order to support the lower blind, the lower blind attachment may take the form of a support wall fixed to the front of the head rail and partially extend rearward with a lower blind secured to the support wall.

The space behind the head rail allows the upper blind to rest freely behind the lower blind.

Various features of novelty characterizing the invention are pointed out with particularity in the claims annexed to and forming a part of this specification. BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of the present invention, its operating advantages, and the particular objects attained by its uses, reference is made to the accompanying drawings and descriptive matter, in which there are illustrated and described preferred embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a general perspective view of a blind panel of a first loop, a second opaque blind panel, and a typical blind showing a headrail with bright and dark horizontal blind strips illustrating and alternating with the present invention; FIG.
FIG. 2 is a sectional view taken along line 2-2 of FIG. 1; FIG.
3 is a cross-sectional view taken along line 3-3 of Fig. 1;
4 is an exploded perspective view of one end of the head rail;
Figure 5 is a cross-sectional view corresponding to Figure 2 showing yet another embodiment;
Figure 6 is a perspective view of another embodiment;
6A is a cross-sectional view of an alternating light baffle;
7 is a side view of a vertical strip blind as a front panel and another embodiment showing a dark effect material as a second panel;
Figure 8 is a side view showing a concertina material as a front panel and a dark effect material as a second panel;
Figure 9 is a side view of another embodiment showing both the first and second panels as a material wound on the roller;
Figure 10 is a side view of another embodiment showing a head rail of a previous embodiment suitable for use with control elements suspended forward of a single blind panel and a blind panel;
Figure 11 is a side view of another embodiment showing a front blind panel formed of two sheets of transparent material and having transverse strips extending between the two sheets and a second dark blind panel;
Figure 12 is a side view of another embodiment showing a front blind panel formed around the roof and formed around the rollers in the bottom rail;
13 is a side view of another embodiment showing a front blind panel in the form of a loop with a free end fixed to the head rail on the curved wall;
14 is a side view of another embodiment showing a front blind panel in the form of a loop with a free end attached to the rear wall of the head rail;
15 is a side view of another embodiment showing a front blind panel in the form of a loop whose free end is attached to the front wall of the head rail;
Figure 16 is a side view of another embodiment showing a front blind panel in the form of a loop with its free end fixed to the top wall of the head rail.

It will be appreciated that the blinds, generally indicated at 10, include a head rail 12 and a bottom rail 14. The blinds are typically located above a building opening such as a window.

In the first embodiment, the blind provides a first or lower loop transparent blind panel 16 and a second or upper opaque blind panel 18. [ It will be appreciated that the first and second blind panels are supported to hang vertically. The second panel 18 typically has a bottom rail.

The first or lower blind is located in the lower region of the head rail and is a lower or front blind.

The second blind panel is located in the upper region of the head rail and is an upper or rear blind.

The first blind panel 16 is a continuous strip passing around the bottom rail rollers 20 in the bottom rail 14 and the free end is arranged behind the head rail to hold the roof panel in place ).

As shown, in this embodiment, the front blind panel is a loop such that the two portions form two panel portions that are substantially suspended downward, one panel portion being spaced forward, and the other portion being spaced backward.

The two panel portions can be considered as the front panel portion and the intermediate panel portion.

The second blind panel, which is the upper panel, is suspended from behind the front and middle panel portions.

The first and second blind panels are spaced from one another.

In this embodiment, the first blind panel is formed of an at least partially transparent light-transmissive material so that even when the first panel is lowered, the light can pass and allow at least some light to be directed into the interior of the building.

The first blind panel 16 has laterally darker blind strips 22 to provide various lighting effects, i. E. To block more or less light. The strips 22 are formed of a thicker or darker material so that they are at least less light transmissive than the fabric of the blind panel. The strips 22 are spaced apart.

Between the strips 22 there are strips 24 of fabric of the first panel 16 that are spaced or more light transmissive and therefore provide alternating bright and dark strips.

As shown, the first panel hangs down in the loop. At its lower end, the panel is free to pass in or out of the bottom rail 14 described below. In the rail 14, the free passing roller or rod 20 guides and controls the first blind material. By adjusting the loops, it is possible to align the dark strips 22 in the two parts of the loop together, and it is therefore possible to align the bright strips 24 with one another. This will provide a passage of light through the brighter strips. By adjusting the loops slightly, the dark strips 22 in one portion of the loop can be made to align or align with the bright strips 24 in other portions of the loop, and more privacy and less light .

By suitable mechanisms (described below), the first and second blind panels can be adjusted and lifted and retracted back into the head rail 12 to provide a complete open area at the building opening or window have. In order to provide this function, the head rail 12 comprises an upper second panel roller 30 located in the upper region of the head rail, and a lower blind attachment located in the lower region of the head rail, in this case the lower roller 32).

The two rollers define axes that are parallel but are vertically spaced from each other. The rollers 32 are positioned below the rollers 30.

It should be noted that the lower blind hangs on the back side of the roller.

Similarly, the upper blind hangs back from the roller. Therefore, the two blinds hang on the same side of their respective rollers, which creates a more compact and aesthetically pleasing profile for the head rail.

In this embodiment, the two rollers are operable by control elements, which in this case comprise first and second control codes, chains, etc., 34, 36, respectively. The head rail 12 preferably includes a elongated transverse channel formed of a thermoplastic material, or a suitable material, such as a metal extrusion, and formed with a screw receiving molding 40.

The head rail 12 includes a front cover wall 42, a top wall 44 and a back wall 46. The front wall 42, the top wall 44, A suitable mounting device (not shown) for securing the blind to the building may be secured to the rear wall or top wall depending on the structure of the building to be attached.

At each end of the head rail 12 is an end cap 48 which is preferably thermoplastic.

The end cap 48 includes a flat planar exterior.

The screws can pass through the end cap and be fixed to the screw molding 40 in the head rail 12. [

End cap 48 includes a body 50 formed integrally with upper and lower hub bearings 54 and 56 for supporting the end of each roller 30,32.

The upper stub sleeve 58 is rotatably mounted to the upper hub bearing 54. The lower stub sleeve 60 is rotatably mounted on the lower hub bearing 56.

The upper drive gear 62 mounted on the upper hub bearing 54 is connected to the upper stub sleeve 58.

The lower drive gear 64 mounted on the lower hub bearing 56 is connected to the lower stub sleeve 60.

The cover plate 66 is secured to the body 50 with openings into which the sleeves 58 and 60 are fitted.

The drive gears accommodate respective control elements, in this case respective upper and lower control codes 34, 36.

As is well known, these codes hang down in an endless loop, one or the other of the loop portions being gripped and pulled down to actuate the respective blinds.

In this case, the cords are typical metal chain cords having metal spheres connected together by wire links as is well known in the art. Spheres are also typically made of a variety of colored thermoplastics.

Different design codes are widely known and can be used. All such codes, whether chain or code of any type, are referred to herein as control elements and, wherever such terms are used, are considered to include such chains, codes, and any kind.

The cord for the upper roller is suspended completely forward of the edges of the first and second blind panels 16 and 18.

The cord for the lower roller is suspended toward the front of the edges of the first and second blind panels.

The main body 50 of the end cap 48 is formed with an upper cord guide rib 70, an intermediate guide rib 72, and a lower guide rib 74.

 The ribs 70, 72, and 74 define a code path or channels for the upper code therebetween. Therefore, the ribs guide the upper cord loop downward and extend into a circular arc around the front of the lower stub sleeve 60 and the lower drive gear 64.

In this manner, the cord loops for the upper hub shaft will hang completely forward of the edges of the first and second blind panels 16 and 18.

The lower cord loop extends around the lower drive gear 64 and is surrounded by ribs 74, 76 forming a cord guide path or channel for the lower cords.

The lower ribs 76 are hollow and round and extend from the ribs 78 forwardly or beyond the axis of the lower hub bearing 56. Thus, the hub ribs 78 guide the lower cord loops so that they also hang toward the front of the edges of the first and second blind panels.

Although the guide ribs are formed integrally with the body, in this example, the guide ribs are formed separately and can be attached or held in place in various ways.

The upper blind roller 32 makes a frictional fit on the sleeves 58 at each end.

The lower blind roller 30 makes frictional fit on the sleeves 60 at each end.

Each blind roller has a groove 79 in which the edges of the respective blind panels are fixed.

In this case, an intermediate loop fastening wall 82, which may be formed of, for example, an extruded metal but otherwise formed, is provided on the front wall of the head rail 12, Is fixed to the groove (80) inside the groove (42).

In this case, the fastening wall 82 is removable by sliding out of the groove. However, the fastening wall 82 may be permanently fastened to the head rail or may be integrally formed with the head rail.

The fastening wall 82 extends between the upper and lower blind rollers 30, 32 and terminates adjacent to the rear wall 46 but is spaced therefrom. The first blind panel loop fastening groove 84 is formed along the free edge of the fastening wall 82. The free end of the blind panel 16 of the front loop is fixed to the groove 84 in this embodiment.

In operation, the first or front panel 16 is lowered, but the second panel 18 is retracted.

As the front panel 16 is lowered, it passes around the rollers 20 in the bottom rail 14. [ When light is desired, the front or bottom panel can be adjusted so that the dark strips 22 align with one another. This allows the passage of light through the bright strips 24 therebetween.

For less light or greater privacy, the front panel can be adjusted so that the dark strips are in line with the brighter strips between them.

It will be appreciated that the front or bottom panel forms substantially the two panel portions, i.e., the front portion and the middle portion spaced apart from each other. Adjustment of the front and middle portions relative to each other alters the lighting effect inside the building space.

For a substantially complete light cut, the second or upper blind panel 18 is lowered. However, the first panel may be allowed to hang down and provide a satisfactory aesthetic effect.

The first or lower blind hangs down from the rear side of the lower roller 32, and control codes are not visible.

The second or upper blinds hang down from the rear side of the upper roller 30 and also keep the cords invisible.

With this arrangement, the profile of the head rail can be kept as slim as possible, thus providing aesthetic appearance without interposition into the interior of the building. In addition, since the purpose of the blind itself is to control the light coming into the building space, it is of utmost importance to keep all of the lower and upper blinds behind the head rail, To be guaranteed. That is, this arrangement keeps the blinds as close as possible to the actual window. The operation of the blind panels by manipulation of the codes and codes can be managed in front of the two blind panels without touching the edges.

In addition, by guiding the cord loops to hang forward, the blind panels can completely fill the width of the building opening or window, thus providing maximum privacy and blocking of light.

A somewhat simplified embodiment is shown in Fig.

In this case, the front blind panels 90 are a single sheet. There is no loop.

And the lower end is attached to the bottom rail 92.

The fastening wall 82 of Fig. 2 has been removed as not required.

There is no clog in the front panel 90 to be fixed in the head rail.

The second or dark panel 94 is similar to the second panel of Fig.

The control codes and guides are the same as those in Fig. 2 and have the same reference numerals.

The cords are guided forward of the edges of the first and second panels as before.

Other possible variations are shown in Fig.

In this case, the illustrated front blind panel control code 96 is located at one end of the head rail, and the control code 98 for the second panel is located at the opposite end of the head rail.

In this case, the end caps 100 are the same as in Fig. 2, and both sets of control codes are guided forward of the edges of the two blind panels.

In some cases, it may be desirable to add the edge channel 102 by attaching the edge channel directly to the building structure below each side of the opening. The edges of the second, darkened panel 94 are received in the channel.

In this way, light that otherwise would have found its way around the edges of the dark panel 94 is removed.

The channels 102 can be replaced by the L-shaped baffles 104 of FIG. 6A, and the building structure provides a suitable portion to which it can be glued.

It is possible that the same head rail can be used for simpler blinds with only a single blind panel. In this case, there may be only one code loop (not shown), but still eliminates the need to allow for space for the cords, to avoid damage to the edges of the panel and also to allow light to come in , It is still guided by appropriate ribs and is suspended forward of the blind panel.

Therefore, the use of a guide directed to the front of the control codes has the effect of allowing blind panels, or panels, to be made over the entire width of the window opening, thus providing more effective light interception when required.

The head rail may be suitable for use with various other types of blind designs.

Figure 7 shows a head rail 120 that is somewhat modified to support a typical vertical blind.

Therefore, the head rail 120 has an integrally formed front wall extension portion 122.

The extension portion 122 is a generally L-shaped cross-section having a horizontal support wall 124 and a vertical front wall 126.

Any suitable trim strip 128 may be supported in the vertical wall 126 in a known manner. The lower blind attachment of the known design, in this case transverse elongated linear blind track 130, can simply be secured to the underside of the support wall 124.

The trolley 132 on the track 130 supports the vertical strip 134 in a known manner.

Such a vertical blind can be operated by codes or by wands in a known manner.

Within the head rail 120, a single upper roller 136 supports the second upper blind panel 138. It is formed of opaque dark effect material.

Suitable codes (not shown) are provided for operation of the roller 136, which is guided forwardly of the edge of the panel 138 by guides as shown in Figs. 1-6.

Therefore, the vertical strips forming the first blind panel can be deployed to provide some privacy, and some light blocking as needed.

With this arrangement, the upper or second blind panel can hang down freely in the rear region of the head rail without interference from the lower blind supported on the support wall 124.

When darkness is required, the upper or second panel 138 can be lowered.

Figure 8 shows yet another embodiment. In this case, the front or first panel is a concertina blind material 140, typically made of translucent material. In this case, the head rail 142 has a single roller 144 for a second or top panel 146 similar to that of Figure 7, which is formed of opaque dark effect material. The front or lower panel is supported by the lower blind attachment, in this case by the horizontal support wall 148.

The support wall 148 is attachable to the front wall of the head rail 142 by a slide flange 149 that fits into the channel 150 formed in the head rail 142.

The support wall 148 defines two ridges 152 and a rectangular tubular blind housing 154 is slidably attached to the ridges. In this manner, the lower con- turbine blind leaves the rear region of the head rail 142 without obstruction, and the upper blind panel is free to hang down.

Appropriate control codes (not shown) are provided similar to FIG. 7 (not shown).

Another embodiment is shown in Fig.

In this case, the head rail 160 with the guides for the control code as already described is similar to Figs. 1-5.

In this case, the front panel 162 is a simple single panel of translucent material, which can be, for example, a natural origin such as bamboo, or another translucent fabric as is well known.

The second panel 166 is a dark opaque material as before.

Appropriate control will operate each of the first and second panels as before.

Figure 10 shows essentially the same embodiment as Figure 9, but in this case only one blind panel 168 on a single roller 170 is shown. The head rail has the same design as in Fig. 9, but the space for the front roller in Fig. 9 is not simply used.

Another embodiment is shown in Fig.

This seems similar to the embodiment of FIG.

In this case, however, the front or first panel 180 consists of two separate sheets 182 and 184 of translucent material. The two sheets hang on the same roller 186. The two sheets are in fact suitable for being wound on, or descended from, one roller 186.

Between the two sheets there are a number of transverse strips 188 of generally S-shaped construction. Strips 188 are glued or otherwise connected to respective sheets 182 and 184.

The roller mechanism is of a known type in itself and allows the two sheets to be suspended so that they are separated as shown in Figure 11, one sheet being wound on one side of the roller, the other sheet being on the other side Respectively.

In this configuration, the horizontal strips are displaced away from each other as shown in FIG.

This allows a greater amount of light to pass between the two sheets into the building.

By the operation of the rollers, the two sheets 182 and 184 can be displaced with respect to each other, so that the sheets hang on the same side of the roller. This causes the strips 188 to rearrange the strips in a somewhat vertical arrangement. The edges of the strips coincide or overlap. This will block more light paths and give greater privacy.

Channels 190 and 192 are formed in roller 186 and receive the edges of each sheet 182 and 184.

The second panel 194 is suspended from the upper roller 196 and is formed of an opaque dark effect material. In this way, the front channel can be manipulated to provide some light and gives a decorative appearance.

Panel 194 may be lowered when light interception is required.

12 is a side view of another embodiment showing a front blind panel 200 formed in a loop and passing around a roller 202 in a bottom rail 204. As shown in Fig.

The bottom rail has two semicylindrical walls 206 that define a semicylindrical channel 208 with an upwardly open opening 210. The panel 200 fits around the roller 202 and is confined between the walls 206 but rotates freely with the roller 202 within the channel 208.

13 is a side view of another embodiment showing a front blind panel 212 in the form of a loop having a free end secured to a curved support wall 216 formed of metal or extruded thermoplastic material in a groove 213 . The wall is fixed to the groove 217 on the inside of the rear part of the head rail. The shape of the wall makes it possible for the wall to surround the upper roller and the dark blind 218 without contact.

Figure 14 is a side view showing a front blind panel 220 in the form of a loop having a free end 222 directly attached to a groove 223 in the rear wall of the headrail, 220 are in actual contact with the dark blind panel 224 on the top roller and also on the front panel 220 on the bottom roller. This may cause some wear when the panels are frequently adjusted, but may be satisfactory in some situations.

15 is a side view of another embodiment showing a front blind panel 226 in the form of a loop having a free end 228 attached to a groove 229 in the front wall of the head rail.

In this case, the front panel comes into contact with itself at the point where the free end passes around the lower roller 230, but does not touch the dark panel on the upper roller.

16 is a side view of another embodiment showing a front blind panel 232 in the form of a loop having a free end 234 secured to a groove 236 in the top wall of the head rail. In this case, there is some slight contact between the free end 234 and the front panel on both the dark blind on the top roller and the bottom roller. However, the two contact areas will be relatively small, and wear will not be negligible.

Claims (18)

A blind for a building opening having a head rail (12) attachable adjacent a building opening and defining upper and lower regions,
An upper blind roller 30 positioned in the upper region of the head rail 12,
A lower blind roller 32 positioned in the lower region of the head rail 12,
The upper blinds (18) stored on the upper blind roller (30)
A lower blind 16 stored on the lower blind roller 32,
An upper blind control mechanism 62 operable to raise and lower the upper blind 18,
And a lower blind control mechanism (64) operable to operate the lower blind (16) and raise and lower the lower blind (16)
The upper blind roller 30 is positioned on an upper axis along an upper plane in the head rail 12 and the lower blind roller 32 is positioned on a lower axis along a lower plane in the head rail 12 Wherein the axes are displaced vertically from each other and the upper blind is operable to hang down by a predetermined side of the lower blind roller (32), the lower blind (16) (62, 64) are operable to be spaced apart from each other by a respective one of said blinds (18), thereby providing a headrail having a slim and aesthetically pleasing profile, said upper and lower control mechanisms The blinds 18 and 16 are lifted upwards by the flexible upper and lower control cords 34 and 36 for the head rails 12 and 12 and the head rails 12 and 14, And guide the flexible upper and lower control cords 34,36 to the front of the edges of the upper and lower blinds 18,16 so that the flexible upper and lower control cords 34,36 (70, 72, 74) for locating the guide rails
The upper blind 18 is an opaque black blind and the lower blind 16 is a translucent blind so that the upper blind 18 is raised When the lower blind 16 is lowered, some light passes therethrough, and when the upper blind 18 is lowered, the light is substantially blocked,
The cord guide ribs guide the upper control cord from the rear to the front of the lower control cord and are formed in a curved shape that does not intersect with each other,
Further comprising a generally linear fastening wall (82) attached to said head rail (12), said lower blind (16) being secured to said fastening wall (82) For blinds. delete The method according to claim 1,
Characterized in that the lower blind (16) comprises a transparent material with horizontal blind strips (22) at spaced-apart intervals throughout the blind. The method of claim 3,
A bottom rail 14 defining a hollow channel and a lower panel guide roller 20 on the bottom rail 14, (20). ≪ / RTI > The method according to claim 1,
Characterized in that the head rail comprises a front wall (42), a top wall (44), and a back wall (46) . delete delete delete delete delete delete delete delete delete delete delete delete delete

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