Abstract: A zebra curtain comprises a curtain rolling device, an upper rail, two fixing brackets, a lower rail and a curtain sheet. Two ends of the curtain sheet are respectively fixed on the upper rail and the curtain rolling device. The upper rail comprises a first shaft sleeve and a second shaft sleeve. The first shaft sleeve comprises a first protruding shaft, and the second shaft sleeve comprises a bearing, a second protruding shaft, a spring and a positioning piece. The curtain sheet comprises light-transmitting parts and light-impermeable portions arranged at intervals. The second protruding shaft moves inside the bearing by the spring pressing to be separated from the fixing bracket and to take off the zebra curtain, then adjusting the light-transmitting parts and the light-impermeable parts, and releasing the second protruding shaft to be axially connected with the fixing bracket, thereby completing the assembly of the zebra curtain.

Abstract: An automatic and dynamic filter window for the air inlet to a chiller or cooler is disclosed, including a controller and a scrolling filter for replacing filters prior to clogging or contamination that may compromise the operation of the chiller.

Abstract: A customizable glass wall system is disclosed. The system comprises at least two glazed, transparent panes mounted to a frame, creating an internal space less than approximately five inches thick. At least one upper roller is mounted to an upper portion of the frame, preferably on a removable headboard, and at least one lower roller is mounted to a lower portion of the frame, preferably to a removable tailboard. At least one partitioned film is attached to the upper and lower rollers. The partitioned film has partitions with varied properties and functions, ranging from thermal insulation to decoration, which can be selectively positioned behind the transparent panes by rotating the partitioned film by means of the rollers until a selected partition of film is displayed. The system can be automated based on time, weather, amount of sunlight, or user preference, and it may include window coverings or solar cells.

Abstract: A customizable glass wall system is disclosed. The system comprises at least two glazed, transparent panes mounted to a frame, which is preferably less than five inches thick. The frame includes a removable headboard whereon multiple rollers are mounted. A film is attached to each of the rollers. The films can be selectively extended and retracted behind the transparent panes in the glass wall system by means of the rollers. Each of the films can be controlled individually by a motor driving each of the rollers. The films can be arranged in any combination to perform various functions, but most importantly, to allow various amounts and types of light to pass through the window system in order to control the thermal insulation of the glass wall system. The system can be automated based on time, amount of sunlight, weather, temperature, and user preference.

Abstract: A looped zebra blind with height compensation and a height compensation method of the same are revealed. The looped zebra blind includes an upper rod, a lower rod and a height compensable looped fabric. The looped fabric consists of a zebra fabric part and at least one compensation part connected to form a loop wound around the upper and lower rods vertically. The loop includes a front fabric and a rear fabric with the same height. The zebra fabric part includes zebra fabric units arranged vertically and periodically. The net length or/height of the compensation part is preset to make total length of the looped fabric become equal to the sum of the total length of the zebra fabric part and the net length of the compensation part. Thereby the height of the front/rear fabric matches up to the preset height of a preset covered area of a window.

Abstract: The invention refers to a system comprising a Venetian blind or the like housed within a double glazing or a double glass. The blind comprises a multiplicity of slats movable by means of a shaft rotatable around a longitudinal axis thereof and housed in a rolling-shutter box of the double glazing. The closure system comprises means for rotating the shaft around the longitudinal axis thereof. The rotation means are housed in a lateral profile of the double glazing and are commanded by a slider translatable between an upper end stop, at which the blind is completely raised, and a lower end stop, at which the blind is completely lowered. The closure system further comprises a first mechanism which prevents a movement of the blind until, during the transport or assembly of the closure system, the rolling-shutter box is disconnected from the lateral profile.

Abstract: In order to control the light or air permeability of an elastic extensible screen (1) disposed between an area to be protected and an external area, and having a permeability that varies with a pulling force exerted on the screen, a motorized mechanism (3) adjusts the pulling force on the screen in response to a setpoint signal, which can be determined on the basis of one or a plurality of signals from one or a plurality of sensors (12, 14, 15), in particular light sensors.

Abstract: The present invention discloses a device for rolling up and unrolling a material web (2) on a shaft (1, 15). The device is distinguished by the fact that a first radial spacing (R1) of the material web (2) from a rotational axis of the shaft (1, 15), which first radial spacing (R1) is assigned to any desired unrolled length (L) of the material web (2), differs from a second radial spacing (R2) of a tensioning cable (3, 16) from the rotational axis of the shaft (1, 15), which second radial spacing (R2) is assigned to said unrolled length (L), with the result that the direction and magnitude of a first torque which is exerted on the shaft (1, 15) via the material web (2) differ from those of a second torque which is exerted on the shaft (1, 15) via the tensioning cables (3, 16), in such a way that, on account of the torque difference between the first torque and the second torque, the shaft (1, 15) is driven by a force (F) which is transmitted by means of the tensioning cables (3, 16).

Abstract: The invention relates to a winding apparatus for covering an opening. According to the invention transmitting means are provided for interaction between a drive unit and a winding element, having a windable pulling element which is received between a first rotatable winding body and a second rotatable winding body in such a manner that the pulling element can be wound and unwound by way of the first winding body which is driveable by the drive unit, wherein the second winding body and the winding element are rotatably coupled together and wherein the cover element can be wound by way of an unwinding operation of the pulling element from the second winding body.

Abstract: An adjustable window covering system for substantially or partially covering a window to block light, provide privacy, reduce heating/air conditioning costs, reduce installation costs, or change the aesthetic appeal of the window or the area around the window is disclosed. A user can dynamically adjust the configuration, location, position, and material layer of the adjustable window covering system without the use of tools and without damage done to the walls of a window.

Abstract: A roll-up curtain closure system having an impact resistant tension rod, wherein the system includes at least one flexible curtain having a first end fixedly attached adjacent a portal along a first end thereof and a second end folded back on itself to define a pocket opening towards the portal first end, an elongated tension rod captured within the pocket, and a curtain driving mechanism operably connected to the curtain second end for varying the height of the pocket. The elongated tension rod comprises an inner flexible fiberglass bar surrounded by an outer soft closed cell foam material, whereby the tension rod is flexible to bend in response to impact force and is resilient to return to its original position after the impact force is removed.

Abstract: A curtain assembly includes a curtain, or panel of flexible material, such as fabric, forming a generally smooth surface extending between a first anchor assembly and a second anchor assembly. Slits through the fabric are sized and arranged to be stretched opened to form respective openings in response to relatively small amounts of stretching of the panel between the two anchor assemblies with a tension force. The openings may be re-closed by allowing the panel to return to a relaxed state. The opening and closing action can be repeated according to new methods to controllably vary the amount of light that the curtain assembly allows through the panel. The curtain assembly may be used as part of various larger assemblies and in various environments.

Abstract: A dual roll blind is provide. The dual roll blind may include a first screen and a second screen having light transmission portions and light shielding portions, respectively, a first winding bar and a second winding bar for respectively winding the first screen and the second screen, a first gear for rotationally driving the first winding bar, a second gear for rotating the second winding bar with rotating dependently on the first gear, an engagement maintaining portions for providing elasticity in the same direction as the mounting direction of the axis of rotation to one of the first gear or the second gear to prevent the gear from breaking away, and a clutch body holding inside the first gear, the second gear, and the engagement maintaining portions. The clutch body can include a setting hole corresponding to the engagement maintaining portions, and at least one of the first gear, and the second gear is interposed between the setting hole and the engagement maintaining portions.

Abstract: Provided is a roll blind apparatus using a roller bar, in which only one roll blind is applied to a rear seat so that in roll blind opening, a roll blind for a front seat can be opened, but the roll blind for the rear seat can maintain a closed state, and thus light introduced to the rear seat can be blocked, and by applying a roller function to an existing bar, the roll blind can be wound around the roller bar (mobile roller assembly), thereby solving the headroom shortage problem.

Abstract: A multiple shade apparatus and method includes a shade system with a shade header with end caps. A first shade roll is provided with a first shade connected with the first shade roll and the first shade includes a first bottom bar. The first shade roll is connected with the shade header. A second shade roll is provided with a second shade connected with the second shade roll and the second shade includes a second bottom bar. The second shade roll is also connected with the shade header. A first connector device is provided that is connected with the first shade and a second connector is connected with the second shade. A detachment device connected with the shade system is provided for automatically disconnecting the first connector and the second connector.

Abstract: A door for closing an opening in a wall, preferably a wall which separates two different temperature zones from one another, in particular one belonging to a cold store, having a door leaf (22), which can be moved in front of the wall opening, and having a heater for heating at least one door component.

Abstract: A shared space divider provides privacy on surfaces. The shared space divider comprises a hub that is placed on a portion of a surface, and at least one partitioning structure coupled to a portion of the hub. The at least one partitioning structure comprises a separator configured to partition the surface into two or more sections. The separator has a ribbon structure, an accordion structure, or a fan structure. The at least one partitioning structure is configured to extend from and retract into or, alternatively, fold out from and fold into the hub. In some embodiments, the shared space divider comprises at least one container for holding items commonly found on the surface. In other embodiments, the shared space divider comprises a clip for attaching to documents. Yet, in other embodiments, images such as advertisements are displayed on at least one of the separator and the hub.

Abstract: A system for attaching a shade material to a roller having recesses in its surface includes inserting portions of the shade material into an associated elongated recess and retaining the material in the recess with an attachment member having peaks and valleys along its length for intermittent engagement with the material within the recess.

Abstract: The present invention relates to a roller blind device, which comprises a special curtain. The roller blind device also comprises a first circular tube for fixing the upper end of the special curtain and a second circular tube for fixing the lower end of the special curtain. A torsion spiral which is capable of rolling up the special curtain and a stop means for lifting the second circular tube are arranged in the second circular tube. Such structure ensures that the roller blind device can roll up a plurality of roller blind curtains or show one of the plurality of roller blind curtains.

Abstract: A window shade that reduces the risk of an individual becoming entangled in cords used to operate the shade includes a headrail adapted for horizontal mounting above a window, a shading material attached to the headrail, and at least one cord for raising and lowering the shading material. The cord is attached to a location adjacent a lower end of the material, and extends upward through cord guides toward the headrail. The cord is encased within a collapsible shroud attached to each cord guide. The shroud is adapted to longitudinally extend as the shading material is lowered toward a deployed position, and then longitudinally collapse as the shading material is raised toward a stowed position. The cord is secured to and is wound about a spool fixed to a spring-loaded roller. The roller provides tension on the cord that counterbalances the weight of the shade so that the shading material may be positioned at any desired level. The shade does not require a graspable cord or cords for operation.

Abstract: A blind for a building opening, and having a head rail attachable adjacent to the building opening; a blind panel stored in the head rail, and adapted to be lowered, over the building opening; and, blind panel control mechanism in the head rail and control guides leading the the control so as to hang free of the blind panel, and permitting the blind panel to fill the building opening.

Abstract: A covering for architectural openings.

Abstract: A multi-display dual-function shade includes a piece of transparency printed with multiple displaying sections and two motors to roll the transparency onto two parallel rollers. The shade acts as a variable glowing display lit by daylight and provides privacy all the time. Multiple displaying sections provide various displaying effect and allow users to choose a desired amount of daylight through the shade anytime of a day or year. The printed transparency can be detached from one roller and completely rolled up onto the other roller to leave the glass window/door uncovered when needed. The multi-display dual-function shade allows easy insertion of new displaying sections into or replacement of the existing transparency to increase the displaying capacity. An integrated multi-display dual-function shade system can be made by installing the shade between the two panes of the glass window/door. An online server system can be set up to generate the customized shade.

Abstract: A cover apparatus for a vehicle includes: a center cover windup part including a center cover and a center windup shaft part that houses the center cover so as to be drawn therefrom and wound therearound; and side cover windup parts each including a side cover and a side windup shaft part that houses the side cover so as to be drawn therefrom and wound therearound. The center windup shaft part and the side windup shaft parts are supported with axes thereof being displaced from each other and end portions thereof overlapping each other in the axis directions thereof so that side edges of the center cover and side edges of the side covers overlap each other in the state in which center cover and the side covers are drawn.

Abstract: A twin roller smoke or fire barrier having: two parallel rollers and a curtain comprised of narrow curtain portions rolled on the rollers and arranged along the length of the rollers of alternate rollers with end margins overlapping opposite each other; the barrier including: a mechanism for varying separation of the rollers by at least the change in the overall diameter of one roller and its curtain portions between wound-up and unwound states, the mechanism including: movable supported roller or rollers; whereby in the unwound state of the curtain, the overlapping margins abut or at least are separated by a negligible amount at the rollers.

Abstract: A screen assembly for a projectile-based simulator is comprised of front, right and left fabric panels that form a hitting bay with a front projector impact screen. Each fabric panel can be raised and lowered with respective roller assemblies that operate unison so that the fabric panels are simultaneously raised and lowered. Zippers are provided between each of the fabric panels that are configured to cause adjacent fabric panels to engage as the panels are lowered and to disengage as the panels are raised to allow the panels to wind upon respective roller assemblies.

Abstract: A cover assembly adapted to be fitted over the open top of a bin includes a pair of spaced apart, domed rigid hoods releasably attachable to upper portions of the hopper whereby an elongated opening is defined between the hoods of sufficient width as to provide access to the hopper. A flexible closure member spans the opening between the hoods while supported on trackways extending along marginal edge portions of the hoods which bound the elongated opening. A pair of rotatable rollers are attachable, one at each of the opposing end portions of the opening. One roller is spring-loaded, upon and from which roller the closure member is wound and unwound during travel of said closure member over the elongated opening. The other roller is connected by pull cables to the closure member, and powered to provide for travel of the closure member.

Abstract: A window covering includes at least one spring motor attached to a rotatable shaft. The spring motor includes at least one spring member that has an elongated body having a windable length, a uniform thickness throughout the windable length, a uniform width throughout the windable length, and a uniform rectangular cross section throughout the windable length. The spring member is configured so that it has a different microstructure at different portions of the first spring member located along the windable length of such that the spring member exerts an amount of force as the portions of the first spring member may wind about a roller of the spring motor that progressively increases such that the roller may prevent movement of the shaft to maintain a position of the window covering material after the window covering material is moved to a particular raised position.

Abstract: System for operating a plain blind within a glass-enclosed chamber having a first end fixed to a blind-roller by means of devices that pull on said blind-roller and on the second end of the blind.

Abstract: A dual roll blind system is able to adjust a light shading degree and comprises a winding roll which includes a roll casing rotatably supported between both side plates of a ceiling bracket; a driving winding roll which includes a moving member disposed between both side plates in parallel with the winding roll and is thread-engaged with a screw shaft rotating by means of a blind winding device of one side, a straight moving member which is provided for left and right straight movements by restricting the rotation of the moving member, and a roll casing engaged with the moving member and the straight moving member; a first blind raw material of which upper end is fixed at the winding roll and in which a light transmission part and a light non-transmission part having constant widths are alternately formed in a width wise direction; a second blind raw material of which upper end is fixed at the driving winding roll and which has a light transmission part and a light non-transmission part corresponding to the f

Abstract: This door comprises a structure with pillars and/or longitudinal members, two or more parallel drums for winding up respective closure elements, and guides for the parallel, guided displacement of said closure elements. The openings of the guides are arranged in a stepped fashion for the insertion of the closure elements in a consecutive position in accordance with the sequence of arrangement of the respective drums.

Abstract: An window covering is disclosed. The window covering comprises a first roller and a spaced apart second roller mounted in a window frame. A first sheet is connected to the first roller at its trailing edge and a second sheet is connected to the second roller at its trailing edge. Each flexible sheet is movable from a stowed position, where it is coiled around a corresponding roller to a deployed position where it is drawn away from the roller to cover the window. The rollers bias the sheets toward the stowed position. The leading edges of the sheets may be removably connectable so that, when deployed together, the sheets cover the window between the rollers and resist being pulled into the stowed position. At least a portion of the first sheet permits more light to pass through than the second sheet.

Abstract: A motor vehicle roof with an at least partially transparent roof section (10) and a shade arrangement (12) located underneath the transparent roof section. In one of three embodiments, with two take-up shafts (16, 18) located in succession in the lengthwise direction of the roof and a length of shade (14) which extends in between, and the front end of the length of shade can be taken up onto the front take-up shaft and the back end onto the rear take-up shaft, the two take-up shafts each being pre-tensioned in the take-up direction, the two take-up shafts being movable along one laterally arranged guide in the lengthwise direction of the roof, and there being a common drive (70, 72, 74, 76) in order to move the take-up shafts (16, 18) in opposite directions toward one another in the lengthwise direction of the roof.

Abstract: A window covering has a plurality of shade elements, each having a first longitudinal edge and a second longitudinal edge. The shade elements are positioned sequentially below a headrail, and each shade element is made of a window covering material that can be rolled about the first longitudinal edge. A first rail or panel of fabric or film extends from the headrail past the first longitudinal edge of each shade element and is connected to lowermost shade element or the bottomrail. A second rail or panel of fabric or film extends from the headrail and is attached to the second longitudinal edge of each shade element. Rungs extend between the first rail or panel and the second rail or panel such that there is one rung below and corresponding to each shade element. The first longitudinal edge of each shade element rests upon a corresponding rung when the window covering is in a closed position. A control mechanism is connected to at least one of the first rail or panel and the second rail or panel.

Abstract: A system for attaching a shade material to a roller having recesses in its surface includes inserting portions of the shade material into an associated elongated recess and retaining the material in the recess with an attachment member having peaks and valleys along its length for intermittent engagement with the material within the recess.

Abstract: A multiple choice shade system includes a main frame, a first winding roller rotatably supported on the main frame, a second winding roller rotatably supported on the main frame in a spaced-apart relationship with the first winding roller, a multiple choice shade element having a succession of screen sections, and an actuator for rotating at least one of the first winding roller and the second winding roller. The shade element has a first end fixedly secured to the first winding roller and a second end fixedly secured to the second winding roller. The shade element is suspended from the first winding roller and the second winding roller in such a manner that one of the screen sections is extended into or retracted from a target area as the first winding roller and the second winding roller are rotated by the actuator.

Abstract: A stanchion has three tapes arranged in spaced relation along the upstanding post for controlling pedestrian traffic. Each stanchion/post has four guide grooves that extend the entire length of the post. Each stanchion is of annular cross section having an inner or inside surface adapted to receive a cylindrical spool around which is wound the individual tape or line. The free end of each tape has a locking element of triangular configuration adapted to be received in the guide groove of an adjacent post. The spools serve to retract each tape so as to provide continuous tension in the tape that is deployed or extended between its associated stanchion and another such post or stanchion. Each tape extends through a rectangular slot provided for this purpose at vertically spaced locations along the post/stanchion. Corresponding locations in the adjacent guide grooves of each post are provided with fittings that form stops for tapes from other stanchions.

Abstract: A coupling assembly for a multiple-tube roller shade includes a support assembly for rotatably supporting and connecting adjacently located tube-end portions and a clutch mechanism providing relative rotation therebetween. The support assembly includes a tube-end fitting and a torque-transferring drive transfer member contacting the tube. The clutch mechanism includes first and second clutch members respectively engaged and separated in closed and opened positions. A pull bar is translatable within one of the shafts and is moved by a draw pin received in aligned openings of the second clutch member, the shaft and the pull bar. The shaft openings are elongated for movement of the second clutch member between the closed and opened positions. An adjustment member threadedly engages the tube-end fitting for vertical adjustment of the fitting with respect to a support panel. The tube-end fitting is secured to a bracket having elongated openings for horizontal adjustment.

Abstract: An apparatus comprising a magnetic sealing system for urging opposing sides of a cover toward the lateral margins of a portal to promote sealing of the sides of the cover to the lateral margins of the portal. The magnetic sealing system biases the opposing ends of a first or second rod directly toward the lateral margins to effect a proper seal.

Abstract: A cover affords access to a selected part of a storage space. The arrangement provides at least one opening which can be configured and positioned at any location on the cover. The opening provides access to a limited area of the storage space.

Abstract: A window blind with a shade having at least two panels, each generally sized to cover the window, suspended between first and second rollers. A roller actuator operating a first roller typically includes a pull loop and a friction clutch. The second roller has a biased mechanism to roll the shade onto the second roller as the shade is unrolled from the first roller. The panels of the shade have different translucencies to provide variety in light transmission through the window blind.

Abstract: An advertising display unit has a blind wound between a pair of spaced rollers rotatably mounted for bringing a selected portion of the blind into a display window area. A mechanism for longitudinally moving the blind is provided which is easily accessed and actuated manually. Each roller comprises an assembly having a larger diameter portion onto which the blind is wound and a smaller diameter portion that rotates with it. A cord drive is secured to and wound a number of turns round the smaller diameter portion of one roller. The cord drive follows a path a section of which extends externally of a housing in which the rollers are mounted. The cord drive passes to the other roller where it is wound a number of turns about and secured to the small diameter portion of the other roller. The cord is wound about the small diameter portion so as to wind off one and onto the other with the rollers rotating in the same direction. The blind serves to transmit drive from the wind-up roller to the wind-off roller.

Abstract: A sign (1) for mounting on an underlayer (P) and for consecutive, repeated presentation of a series of images. The sign (1) comprises at least two elongated display members (4). Each display member (4) has a plurality of sides for displaying images. The sign also comprises a respective drive member (6) for rotating each display member (4) and a frame portion for supporting the display members (4). The frame portion comprises at least one first element (7) for mounting to the underlayer (P) and at least two second elements (8) that are connectable to the first element (7). A display member (4) is rotatably supported on a first side of each second element (8). The drive member (6) for each display member (4) is mounted on a second side of each second element (8). The second side of each second element (8) is opposite the first side of each second element (8).

Abstract: A curtain consists of a web of temperature resistant material that forms a web surface and that may be unwound from a coil that is arranged on a coil core. The curtain web has lateral edge regions on either side of the web so as to be separated by the curtain web's width and upper and lower end edge region. The curtain web includes a first outer web layer, and inner layer of fibrous material that extends over a predetermined length and that forms two opposed surfaces, one of which is adjacent to the first outer web layer. The curtain web also includes a second outer layer that is adjacent to the other surface of the inner layer. The curtain arrangement further includes a supply for a liquid fire retardant that extends with in the region of the upper end edge region and over the width of the curtain so as to supply the liquid to the fibrous material.

Abstract: An advertising display unit has a blind wound between a pair of spaced rollers rotatably mounted for bringing a selected portion of the blind into a display window area. A mechanism for longitudinally moving the blind is provided which is easily accessed and actuated manually. Each roller comprises an assembly having a larger diameter portion onto which the blind is wound and a smaller diameter portion that rotates with it. A cord drive is secured to and wound a number of turns round the smaller diameter portion of one roller. The cord drive follows a path a section of which extends externally of a housing in which the rollers are mounted. The cord drive passes to the other roller where it is wound a number of turns about and secured to the small diameter portion of the other roller. The cord is wound about the small diameter portion so as to wind off one and onto the other with the rollers rotating in the same direction. The blind serves to transmit drive from the wind-up roller to the wind-off roller.

Abstract: A stowable partition assembly for a truck cab provides privacy for an interior sleeping area mounted aft of the operator space. The assembly has an overhead track depending from the cab ceiling, oriented to define a border between the forward operator area and the aft interior sleeping area. A pair of curtains are hung from their upper edges from the overhead track and are positionable on the track to divide the aft living space from the forward operator space when extended. A pair of stowage compartments are located at each end of the track along the interior sides of the truck cab to receive the curtain when retracted. Retraction of the curtains is provided by roll up retractors disposed in each stowage compartment. The curtains are each attached along one of two vertical edges to the roll up retractor to be wound thereon. An interlocking latch provides closure of the curtains when pulled from the stowage compartments.

Abstract: A roll-up shade is doubled and its ends suspended from a head rail that is mounted above a window. One end is attached to a roller tube and the other end is attached to a stationary tube, with a bight being formed between the tubes. A first sheet is defined from the bight to the roller tube and a second sheet is defined from the bight to the stationary tube. A weighty rod is positioned in the bight to cause the bight to sag away from the head rail, and a shade guide surrounds the rod to guide the shade. With this structure, the roller tube can be rotated to pull up the first sheet and raise the bight or to lower the first sheet with bight, with the second sheet (i.e., the sheet that is directly attached to the stationary tube) remaining unmoving above the bight. The shade is patterned such that when the shade is raised and lowered, the relative motion between the two sheets causes the shade to alternatingly assume high and low opacity configurations. The roller tube can be motorized if desired.

Abstract: A window shade system including a flexible shading member having multiple, sequentially connected shading elements, at least one of the shading elements having a tint factor of between five and fifty percent inclusive; at least one of the shading elements having a tint factor between fifty-one and ninety-five percent inclusive; and first and second reel assemblies, each reel assembly being attachable to a structure adjacent a window, the first reel assembly having a first rotatable reel shaft secured to a first end of the shading member, the second reel assembly having a second rotatable reel shaft secured to a second end of the shading member, the first and second reel assemblies working in a complimentary fashion such that when one reel shaft is rotating in a take-off direction the other reel shaft is rotating in a take-up direction.

Abstract: Closures such as rolling shades or blinds which include a drum for winding slats of the closure body and which are formed by two superposed shafts. Separation devices are provided adapted to prevent any friction between layers of slats wound on the shafts. These devices may include stepped pulleys associated with slat end pieces of different lengths.

Abstract: A double panel window shade is formed by shade panels wound on inner and outer coaxial rollers. The inner roller includes a shaft secured at each end and journaled in mounting brackets at each end of the inner roller. The outer roller includes end plates journaled on the inner roller shafts. The outer roller defines a slot for receiving and passing the inner shade when said outer shade is fully unrolled from the outer roller. Each shade panel includes a bottom rail. A pull cord is provided for raising and lowering the shades by rotating the rollers. The pull cord is operatively connected to the inner roller by a dual direction spring clutch. The rollers are formed by a pair of roller tubes aligned one inside the other and each having a central axis, the axis of rotation of each tube being the central axis of the inner tube, and the central axis of the outer tube being spaced from its axis of rotation.