Abstract: A main opaque shade, and one or more translucent shades, all on rollers, and capable of being individually drawn and retracted. They are positioned as in layers fore to fore and spaced from inner to outer positions, with the opaque shade outermost. The translucent shades let substantial light through and have patterns or figures thereon to cast patterns in the inner space. When more than one translucent shade is used, they can be adjusted toward and from the main opaque shade.

Abstract: A blast protecting panel for interior portions of building windows includes a blast-shielding panel of a high tensile fiber woven in an open weave fabric in such a manner whereby a high degree of light is transmitted through the fabric while still allowing see-through visibility. The fabric is mounted using a retention system, which can be either fixed or dynamic, allowing the fabric to unwind and billow out into the building, retaining flying glass and debris. The retention system preferably includes fixed upper and dynamic lower tension retainers around which a length of fabric is wound and which allows the fabric to unwind therefrom without becoming detached from the retainer case or from the surface to which the retainers are mounted.

Abstract: A flexible window assembly for covering a window in a flexible wall such as is commonly found on recreational vehicles such as tent campers. The assembly includes a flexible transparent window pane that covers the screened opening in the flexible sidewall. The window pane is attached to the sidewall by a zipper and by rolling the window pane into a cylindrical shape the window pane is opened. A pair of flexible retaining straps extend between the top edge and the bottom edge of the wall which maintain the window pane in the cylindrical position. Each retaining strap includes a pair of cords, and a flexible decorative curtain is positioned in between the cords. A toggle member frictionally engages the cords and contacts the lower edge of the curtain, and accordingly the curtain can be positioned on a closed position, a raised position, or in a plurality of intermediate positions between the closed position and the raised position.

Abstract: A retractable curtain-like closure for a vehicle such as a trailer includes an automatic retraction mechanism and vertical and horizontal tensioning mechanisms. Once the curtain has been extended over an open side of the vehicle, the curtain is vertically tensioned by rotation of a roll bar extending along a bottom edge of the curtain until the curtain is taut. The roll bar is held in position during vertical tensioning by a series of hooks located along a bottom edge of the trailer. The curtain is tensioned in a horizontal direction by connecting the side edges of the curtain to a rotatable rod by a series of pins and rotating the rod to tension the curtain. The horizontal tensioning mechanism also includes a weather sealing flap which is closed to seal the side edges of the curtain by rotation of the tensioning rod.

Abstract: A machine tool comprises a workpiece table which has a clamping surface for workpieces to be machined and a spindle head displaceable in a working space above the workpiece table relative thereto by means of a shifting mechanism and having a spindle receiving tools for machining the workpieces. The shifting mechanism comprises three carriages movable orthogonally to one another, of which the second carriage is mounted displaceably on the first, and the third carriage displaceably on the second carriage, the spindle head being joined to the third carriage. The first carriage is arranged behind the working space and above the clamping surface, preferably above the working space.

Abstract: A curtain consists of a web of temperature resistant material forming a web surface and may be unwound from a coil arranged on a coil core. The coil is supported by a bearing arrangement including at least one supporting surface so that the coil core, at least on one of its ends, is supported adjustably in height within a guidance. Alternatively or in combination, the curtain is guided by lateral guide bars including an arrangement for preventing the inserted curtain edge to be drawn out. Another feature is that at least two curtain webs the surfaces of which face each other have a common end bar forming a weight for the curtain.

Abstract: A new sun shade system for windshields for shielding the interiors of vehicles from sunlight. The inventive device includes a pair of sunshade assemblies disposed adjacent each end of the windshield. Each assembly includes a housing which is mounted to a roof support member of the vehicle. A sunscreen support roll is supported within each housing and a sunscreen is attached to each roll. The sunscreens include rods attached to their edges with a handle connected to each rod. The handles are connected together so that the sunscreens are secured in position over the windshield. The sunscreens are sized so that each sunscreen covers about one-half of the windshield. A semi-circular recess is formed in each of the rods in order to accommodate the support post of a rear view mirror. Supplemental attachments are secured to the windshield at the center of the top and bottom edges thereof, and are adapted to engage with the rods for providing additional securement of the sunscreens.

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: A free-standing, portable retail merchandising unit having improved merchandise display features.

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.

Abstract: A motor-driven screen roller assembly is provided that consists of each of two motor-driven screen rollers controlled by a FORWARD/STOP/BACKWARD control switch through a selector switch. Each motor-driven screen roller includes a mounting plate fixed to the ceiling inside an automobile, two reversible DC motors fastened on opposing ends of the mounting plate, at the bottom. A roller is coupled between the reversible DC motors, and a screen having one end fixed to the roller and an opposing end thereof being coupled to a slat. The FORWARD/STOP/BACKWARD control switch and the selector switch are connected in series between the reversible DC motors of the motor-driven screen rollers and the battery power supply circuit of the automobile. The FORWARD/STOP/BACKWARD control switch operates in cooperation with the selector switch to selectively control the operation of the DC motors of the first motor-driven screen roller or the second motor-driven screen roller.

Abstract: A fire door system comprising first and second fire door assemblies each assembly including a fire door, a temperature sensing device and an operator. The operators of each of the assemblies are electrically interconnected such that when the fire doors simultaneously close when either (a) the temperature sensing device senses that the ambient temperature exceeds a predetermined value or (b) the circuit between the operators of the assemblies is deactivated.

Abstract: A modular building system is adapted for the construction of various temporary and semi-permanent relatively light structures, such as yard storage sheds, greenhouses, gazebos, sun rooms and the like. The system includes various modular framing elements, with base and header plate components each containing a integral roller having an extendible and retractable flexible wall or roof panel respectively attached thereto. Thus, the frame members may be assembled to form the desired structure, with the wall and roof panels being selectively extended from the base and header plate members as desired to close various respective wall or roof portions of the structure as desired. The extendible and retractable wall and roof panels may be formed of transparent, translucent, or opaque thin and flexible sheet materials as desired, either of woven or non-woven materials, metal or plastic screen, etc. The frame components are preferably formed of a plastic such as polyvinyl chloride; other materials may be used.

Abstract: The light-exclusion covering is composed of two planar structures (1) located one behind the other, each of which consists of side by side webs (B) with regions (2; 3) of differing light transmissivity, that are connected to each other by connecting pieces (Z) with similarly selectable light transmissivity.The planar structures (1) consist preferably of a woven textile fabric produced on a knitting machine with programmed data for sizing and for the light transmissivity of the individual regions. (FIGS.

Abstract: A flexible partition suspended from a ceiling of a gymnasium or the like. The flexible partition includes a drive cylinder which extends the length of and intermediate the curtain forming the partition. The cylinder is provided with a drive motor internally of the cylinder, and a reaction device is provided externally of the curtain such that the motor device when activated will drive the cylinder to wind up the upper and lower portions of the curtain. The upper and lower portions of the curtain are attached at diametrically opposed locations on the cylinder, and hook and loop type fastening strips are provided on the edges of the curtain and the side walls so as to seal the curtain against noise or dust.

Abstract: A novel greenhouse curtain system has a plurality of movable curtains oriented vertically one above the other to form a flexible wall. Each curtain is supported by a fixed upper edge, and the vertical position of the lower extent of each curtain may be adjusted by means of a traveling spindle used to furl or unfurl the curtain. The traveling spindle rises and descends as the curtain is furled (raised) or unfurled (lowered), and is rotated by a tensioned cable wrapped in opposite directions around two drums aligned concentrically one on end of the roller bar. The cable is anchored on one end below one of the drums, and is wrapped in opposite manner respectively around both drums and passes vertically to a pulley, and then to a driving means such as a winch. The dimensions of the drums are such that the curtain remains in stable position as long as there is no movement of the cable to or from the driving means.

Abstract: A window shade that can be applied to the rear window of an automobile by a pair of suction cups. The window shade includes a pair of shades that can be pulled from a rod. The suction cups are connected to the rod by brackets that are pivotally connected to corresponding rod clamps. The suction cups are screwed into the brackets and can be adjusted to any window shape. The clamps can slide along the length of the rod. Having a pair of pivoting adjustable cups along with a pair of corresponding sliding clamps, provides a window shade that can be mounted to a variety of different window sizes and shapes.

Abstract: A pair of links hangingly support a bearing plate that secures a winding shaft of a shutter curtain. The links are arranged so that the dimension of the space accommodating the links can be minimized. A first link pivots at one end to an end of the bearing plate, adjacent to a shutter guide, and swings at the base end to a side wall of the shutter case so as to project upward away from the shutter guide. A second link pivots at one end to the other end of the bearing plate, away from the shutter guide, and swings at the base end to a portion of the side wall of the shutter case so that the second link extends under the winding shaft toward the shutter guide to bypass the winding shaft. Thus, both the first and second links can be accommodated within the diameter of the winding wheel.

Abstract: The invention provides a multilayer plastic sheet of self-rollable material comprising at least two layers of material joined to one another at states of different relative stretch and capable of alternating between a relaxed and a tensioned state and of inherently assuming a rolled-up configuration in said relaxed state as a result of the different states of stretch of the respective layers and to retain said inherent property of spontaneous rolling up even after prolonged exposure to sunlight and heat.

Abstract: A roll-type screen assembly is provided with lateral guide rails adjacent the sides of an opening with a window or door. The guide rails guide the lateral edges of the screen and contain an inflatable tube along the length thereof. A small hand pump with a release valve is employed to releasably lock the edges of the screen.

Abstract: Garage extension apparatus comprising a pair of channel section guide tracks, one on each sidewall of the garage, and a movable structure formed of a roof, depending sidewalls and an up-and-over door. The structure is supported on a pair of ground engaging wheels, each mounted at the front of a respective one of the sidewalls by a screw jack, and on a pair of upper wheels which each run in the channel of a respective one of the guide tracks and which are pivotally mounted at the rear of the roof so that the movable structure can follow the slope of the carriageway, up or down, as it is drawn out of the garage. The screw jacks enable the movable structure to be levelled if the ground slopes from one side to the other.

Abstract: A screen projection apparatus includes a housing within which a pair of projection screens are stored in a rolled position on motor driven rollers. A pair of access doors are mounted on the housing and support an idler roller over which a screen passes. The access doors open, one at a time, and the idler roller ensures that each of the screens when unrolled hangs in a common plane thereby eliminating the need to refocus the optical projection equipment which is used with the apparatus.

Abstract: For shielding a window area (2) in a wall or an inclined roof surface (3) a roller screen, e.g. an insect net (1), is provided which comprises a spring-biassed roller bar (9) at the upper edge of the opening (2) and a bottom bar (13) at the lower edge of a flexible screen web (1). The bottom bar (13) has guide members (17) slidable in guide rails (11, 12) having at the bottom a locking device for arresting the bottom bar (13). At either end of the bottom bar, the guide members include a guide member (17) and a subjacent roll (18) pivotally journalled in the bottom bar (13) so that, from a first position in which it is in axial alignment with the guide member, the roll may be swung to a locking position outside the path of movement of the guide member (17). The rolls (18) are functionally connected and biassed so that the first position and the locking position are stable switch-over positions.

Abstract: A rollaway opening closure and more particularly a fabric opening closure adapted to be stored in a reeled or rolled position and to be unrolled from the reel to close the opening. The apparatus includes a roller, a drawbar, a sheet of fabric and at least one pivoted bar link. The axis of the roller, the drawbar and the pivot of the bar link are maintained parallel as the fabric is unrolled from the roller. The drawbar and the bar link are structurally attached. The fabric is attached to the roller and the drawbar but unattached to other elements of the apparatus. A rotational biasing means biases the fabric into rolled position on the roller and causes the fabric to be maintained taught when unrolled and in closing position at an taught when unrolled and in closing position at an opening.

Abstract: An automobile window shade system comprising a frame (20) formed of horizontal tubular elements (20a through 20c) and vertical tubular elements (22e through 22f) interconnected by T-shaped connectors (24a through 24f). The frame is installed inside the automobile body and contains a cord (42) guided through a plurality of guiding means (64, 66, and 68). Two adjacent shades (94 and 96) which are made of a light-impermeable flexible material are attached to a yoke (84). One end of the yoke is located inside the vertical tubular element (22e through 22f) between two stops (88 and 90) which are rigidly attached the cord. The cord is also connected to a handle (110). When the handle (110) is moved in the window shading direction, it moves the cord (42) and hence the stops (88 and 90). When the upper stop (88) comes into contact with the yoke (84) it moves the yoke and the shields (94 and 96) down, thus shading the windows.

Abstract: The present invention relates to rollably retractable cargo-retaining nets (3,7) for vehicles with folding split backrests (1,5). Separate net containers (2,6) are provided in the respective backrests (1,5) and the nets are joined by a telescopic rod at an upper end, which increases the safety and flexibility in comparison with known systems.

Abstract: A multi-purpose automatically rewindable sun-shade devised to have a quite long resilient curtain which is wound around a winding tubular shaft when it is not in use. The curtain may be pulled out to a needed length for use and rewound automatically on the winding shaft by twisted coil springs. The sun-shade comprises an elongated winding tubular shaft for winding a long curtain thereon, two immovable rods adapted to extend in the interior of the winding shaft, two coil springs fitting around the immovable rods in the winding shaft to generate tension when twisted. The tension force rotates the winding shaft to rewind the curtain after use. The shade has two sleeves assembled around the winding shaft and forming a central through hole for a square end of each of the immovable rods to pass through to engage a central square hole in each of two shaft caps assembled with the two sleeves so that the sleeves and the winding shaft can rotate together between the two shaft caps.

Abstract: A shutter assembly for a bay window to close an opening by moving a shutter curtain upward from a containing space in the bottom of the bay window and to open it by way of a downward movement of the curtain under the influence of a coil spring. The basic driving system for the shutter is located either in the roof or in the lower containing space of the bay window. Various devices are disclosed including a seal for sealing the space between the leading member of the curtain and the roof of the bay window, a structure for installing the driving motor, a structure for detachable connection of the driving shaft, hainging members used to raise and lower the curtain, a structure for supporting the winding drum on the driving shaft, as well as features to allow maintenance of the shutter assembly.

Abstract: A pickup truck has a vertically movable tailgate assembly. The tailgate assembly includes a rigid cross beam along with a flexible net. The tailgate is automatically moved along a track from its raised to its lowered position.

Abstract: A sun screen for selectively covering automobile windows movable between a stowed position exposing a window and a deployed position covering at least part of a window. The sun screen can be sized to fit a variety of window shapes, including trapezoidal or other non-rectangular shapes. The translucent screen is rolled on rollers mounted above the window. The screen includes a central rectangular portion sized to conform to the largest rectangle making up the window. Individual angled screens, having band-like shapes, are mounted as needed at the ends of the central portion on angled rollers. The lower edge of the central portion is secured to a transverse rod or tube with the lower edges of the angled screens secured to tubes in a telescoping relationship to the transverse rod ends. The outer ends of the tubes are guided in a track for movement in a generally vertical direction along the window edges.

Abstract: A well sealing device using an internal propellant charge to drive slip segments outwardly against a well casing. A pin shears, releasing the device from its wire line prior to final setting of the slip segments.

Abstract: A profile assembly is disclosed for the wedge-sealing of a sheet of flexible material, especially a window shade. It comprises a set of male and female extruded plastic profiles. The female profile is U-shaped and defines an open housing, one of its legs has, at its free end, a resilient sealing lip turned into the housing while the other leg has, also at its free end, a first wedging lip. The male profile is L-shaped and has a wedging branch and a base branch, the two making between them an inner angle of less than 90.degree.. Furthermore, the base branch includes, at the end away from the wedging branch, an upright arm having a second wedging lip on its face that looks toward the first wedging lip.

Abstract: A sun roof for a vehicle having an opening in the roof thereof comprises a single outer cover and inner roller covers. The roller covers includes two sun protective screens which can be rolled up and unrolled and which extend beneath the outer cover within the opening on opposite sides of a middle line of the vehicle roof extending in the travel direction. The roller devices operate independently of each other.

Abstract: A window screen is attached to a sliding sash and to the sill. Fixed to the screen are two or more vertical bands of coil spring material. Thus when the sash is closed the springs cause the screen to coil tightly. As the sash is raised, the screen is uncoiled so that it covers the opening but remains taut. The coil may be located at the middle of opening or at the top. A housing integral with the sash end of the screen or surrounding the spring coil protects the coil from weather and debris.

Abstract: A fire protection device for a structure using a fire resistant sheet material compacted in a folded condition in a housing on the roof of the structure so that when deployed from the housing it can be unfolded to quickly envelop the structure.

Abstract: A roller blind assembly in which the blind roller (10, 12, 14) is turnable, preferably by a motor, to raise and lower the blind along a track (28). To reduce friction and prevent jamming due to dirt or debris on the track, the lower end of the blind is linked (32) to an inertia device (30) preferably in the form of a tubular roller having a relatively high amount of inertia and mounted for rotation with guide wheels (34) at each end of the roller running in parallel tracks 28). The angular momentum developed by the roller (30) assists in drawing the blind over obstructions in the track (28) and is additional to any gravitational effects.

Abstract: This invention relates to a partition such as a curtain, blind, shade etc. employing the self-coiling sheets which play the dual role of the partitioning medium as well as the mechanism providing the means for extending and retracting said partition. Said self-coiling sheets constituting the self-coiling partition may be a planar plastic sheet of a single or multiple layers in structure with an intrinsic material property of coiling itself into a roll, or a fabric reinforced with a plurality of the spiral springs providing the self-coiling characteristics, or a double layer of plastic sheet including a thin flat sheet under a tension suprimposedly bonded to a corrugated plastic sheet with a stiffness under compression whereby the combination of the tension and the compression provides the coiling moments distributed over said plastic sheet or double layer structure.

Abstract: A thermostatic oven having an oven body with a front opening having a door which comprises windable sheets which cover the front opening with a space therebetween to close the same and which are wound up when the front opening is to be opened.

Abstract: An awning including an awning box having an outlet slot and, on its end sides, bearings for a winding shaft supported in the box, the awning box being non-rotatably mounted in wall fixtures. The canvas for the awning is connected at one end to the winding shaft and at its other end to the extension bar and is guided through the outlet slot. In order to reduce installation tolerance alignment errors between adjacent awnings, and to simplify the installation, the awning box contains, at least on one side, an attachment extending in the longitudinal direction of the winding shaft. The associated wall fixture, for receiving the attachment, contains at least one bifurcated extension extending at right angles to the longitudinal axis of the winding shaft, so that the attachment is inserted in the jaw of the extension, with the jaw being open in the radial direction with respect to the winding shaft.

Abstract: An insulating window shade assembly includes a shade frame having a pair of vertical side channels open in a direction facing one another and designed to be mounted on the inside of the window to be insulated. A flexible insulating shade having inner and outer spaced apart parallel panels extends downwardly from the top of the channels, and the margins of the panels extend into the channels. Edge seals are provided in each channel made up of a pair of flexible polyester film strips with the adjacent sides of the strips being spring biased towards one another but being separable so that the margins of the shade panels may lie between them. The flexible character of the strips forms an effective insulating seal about the margins. A rerailer assembly is provided at the tops of the edge seals to guide the margins of the each panel between the strips of the edge seal should they become dislodged.

Abstract: An edge seal for fabrics such as insulating window shades is disclosed. The seal is formed by tracks disposed on each side of fabric when the fabric is drawn and the tracks receive the fabric margins. A lip is provided on each track, which interlock with flaps cut in the margins to hold the margins in the tracks even when forces are applied to the fabric which would ordinarily pull the margins out of the tracks.

Abstract: The invention relates to a device for heat insulation and air conditioning of structural assemblies, in particular of windows etc., comprising a first driven winding roller (4), arranged at a first end for a windable flexible wall and deviating rollers arranged at the second end, the deviating rollers at the second end being supported stationarily and a second winding roller being provided which can be rotated simultaneously with the first winding roller. The longitudinal edges of the first wall are fitted with wall guiding profiles clamping between them, over part of their length, a web material, being constantly present in the guide profiles as well as being adapted to be redirected repeatedly by the deviating rollers so that a varying number of tightly closed air chambers can be formed optionally in a space. The web material of the flexible wall may consist of successively disposed materials having different properties of transparency, reflectivity and absorption.

Abstract: An insulating window shade assembly includes a first roller carrying an insulating shade and a second roller carrying a cover fabric. The shade and cover fabric are supported in essentially face to face relationship, and their bottoms are secured together by a Velcro-type fastener. The cover fabric conceals the insulating shade, it may be removed from the shade for cleaning or may be changed and it may be adjusted for smoothness and to compensate for any stretching which occurs in the materials.

Abstract: An insulating window shade assembly includes a shade frame having a pair of vertical side channels open in a direction facing one another and designed to be mounted on the inside of the window to be insulated. A flexible insulating shade having inner and outer spaced apart parallel panels extends downwardly from the top of the channels, and the margins of the panels extend into the channels. Edge seals are provided in each channel made up of a pair of flexible polyester film strips with the adjacent sides of the strips being spring biased towards one another but being separable so that the margins of the shade panels may lie between them. The flexible character of the strips forms an effective insulating seal about the margins. A rerailer assembly is provided at the tops of the edge seals to guide the margins of the each panel between the strips of the edge seal should they become dislodged.

Abstract: An apparatus for insulating a surface area is disclosed having an insulating sheet mounted to a roller for winding and unwinding thereon. Sealing means are provided for sealing the edges of the sheet when the sheet is unwound to insulate the surface area.

Abstract: A curtain for the window or skylight, etc., comprising a plurality of coiling sheets connected to each other in series is disclosed. One end of first coiling sheet is spliced to an adjacent end of the second coiling sheet in such a way that the said first and the said second coiling sheets coil together about the common axis which is the line of splicing of said two coiling sheets. The other end of the first coiling sheet is similarly spliced to the adjacent end of the third coiling sheet. A fourth and a fifth coiling sheets can be spliced to said second and third coiling sheets in the same manner and so forth. In the "coiled up state" which is the retracted state of the coil curtain, the coil curtain is of the configuration of a series of rolls of the coiling sheets adjoining each other.

Abstract: The invention relates to freight containers, in particular containers for air transport with a supporting frame which is made of profiled sections or the like, the long sides of which frame comprise polygonal frames which have roof sections and reinforcing vertical struts, and are joined by transverse sections. In spite of being made according to standard, it should be possible to stack these readily on top of one another and secure them to each other. They should also feature facilities which allow access at all times to the freight to be transported. The supporting frame (7) of such an improved container (5) features, between the roof sections (18), clamping elements (21,24) to secure neighboring, stacked containers in place; also for stacking purposes, the roof sections are reinforced and the vertical struts (16) are positioned at the places of greatest load. If desired, the reinforced roof sections house facilities (40,41,42) to guide closure means (35) for stacked freight containers.

Abstract: An edge seal for a solar collector type flexible film material is provided for forming a generally air-tight heat insulating reusable seal around the edge of an opening in the surface of a building structure. The edge seal is formed around the film material which is sized to cover the window opening and overlap the edges of the opening. A band of magnetically permeable particles is adhered along the edge of the substrate forming the film material by a suitable adhesive. A strip of magnetic material is adhered around the edge of the opening. The permeable particles are attracted to the magnetic strip to form an effective air-tight seal between the flexible film material and the opening to essentially form a dead air space between the flexible material and the window opening. The flexible film material can be mounted similar to a window shade adjacent to the upper edge of the opening.

Abstract: An insulating shade including a channel-type frame which is designed to be permanently installed on the prime window frame. The shade assembly which is mounted in the frame includes a pair of rollers which are geared together so as to rotate simultaneously and simultaneously either take up or play out the shade material. The rollers with the shade are supported on bearing plates which in turn are hung on spring brackets that snap into the channels permanently secured to the window frame. A cord operated pulley carries a gear which in turn drives the two rollers so as to raise and lower the shade. Weather stripping is secured inside the channels of the frame, which cooperate both with the sides of the shade itself and the weighted roller at the bottom of the shade to prevent cold air from flowing about the shade.

Abstract: Window unit (2) includes a window casing (4) having a plurality of flexible plastic sheets (6) mounted on spring rollers (30). Sheets (6) can be unrolled into an operative position where they are spaced in front of a transparent window panel to act as storm windows. Rectangular sealing frames (8) are movable in casing (4) between a first position in which the frames (8) are spaced apart to receive the plastic sheets (6) therebetween and a second position in which the frames (8) are pressed together to trap and seal the plastic sheets (6) therebetween. Frames (8) are movable manually by elongated shafts (50) which pass through key hole slot (56) in window casing (4).