Abstract: The adjustable upper beam with a cuttable blind assembly is mainly made up of a blind, a movable upper beam having a telescopic inner tube and outer tube, two retaining clamps, a pull cord wherein the upper side of the blind is held in place by the upwardly and inwardly bent bottom edges of the inner and outer tube of the movable upper beam. The inner and outer tube have a pair of symmetrically protruded registration lugs for registration with the locking holes of the retaining clamps in assembly. The front and rear clamping plates of the retaining clamps can hold the inner and outer tubes firmly in place so as to make the clamping of the retaining clamps against the blind in a firmer manner. The front and rear clamping plates are provided with a hole and a cord seat for the passage and positioning of the pull cord whereby the blind can be adjusted of its size in a DIY manner for fixing to windows of various dimensions.

Abstract: A slider ventilation curtain for an agricultural building has upper and lower curtains, with the lower curtain having an upper hem pipe that is mounted in a fixed location on the wall of the building, and an upper curtain that slides past the lower curtain, up to a closed position and down to a ventilation position for permitting outside air to enter the building from above the animals. There are roll up mechanisms associated with the lower hem pipes of the two curtains to permit the curtains to be rolled up for storage, so that the wall can be fully open for summer conditions.

Abstract: A safety device for window curtains comprising a stopper safety hanger, a single wheel safety hanger and several safety clamps. When an object is caught by the curtain string, a small copper ball of the stopper safety hanger goes sideways from a copper wheel contracted by a steel spring wire making the copper wheel drop by its weight and loose the curtain string. A single wheel hanger is fitted for easy, balanced and convenient operation. Two string safety clamps automatically spring out from the two hangers by action of the spring clamp. The loosened curtain string separates the entangled object from danger, guaranteeing safe operation of the window curtains.

Abstract: A system and method for rapidly and reliably sealing off a selected opening from the passage of smoke, noxious fumes, or contaminated air includes a powered clutch and viscous governor that provides a fail-safe mode of operation. A curtain is positioned in a housing adjacent to an upper limit of an opening such as a hoist access-way. The curtain is wrapped around a spindle that is connected to a spool via two cords. The curtain is held in the housing in a stored configuration by a powered clutch so that upon removal of power, either via a controller or by power loss, the clutch releases the spool allowing the cord to unwind lowering and thus deploying the curtain. A capacitor can be included to prevent inadvertent deployments due to momentary power loss. The speed at which the spool rotates, and correspondingly the curtain deploys, is limited by a viscous governor coupled to the spool.

Abstract: A retractable screen is located within a frame portion of a window. The screen accumulates on and pays out from a spring biased roller located in said frame portion. The screen is fully retractable and for the most part hidden for viewing, egress or cleaning purposes, and is available as desired when moved to the operable position. The screening material utilized includes “T” shaped members for easy installation in compatible grooves provided with the handle and the roller.

Abstract: A releasable cord connector apparatus includes a receptive member and a connective member that inserts into the receptive member and releases when a force is applied. The receptive member couples to a headrail and has a recess into which the connective member inserts. The connective member is also attached to a cord which is used to raise or lower a window covering. The connective member releases from the recess of the receptive member when a child or pet becomes entangled in the cord.

Abstract: A flexible partition suspended from a ceiling of a gymnasium or the like, includes a drive cylinder which extends the length of and intermediate of the curtain forming the partition. A cylinder is provided with an internal drive motor, 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. In one embodiment, the upper portion is a single curtain panel and is attached to the periphery of the cylinder at an axial line. The lower portion includes two spaced curtain panels which are connected to the periphery of the cylinder at diametrically opposite lines thereon. In another embodiment both the upper portion and lower portion of the curtain include two curtain panels, so as to form a full-size double curtain. In such an arrangement, the flexible partition has a spaced-apart double panel configuration at least at its lower portion, to provide a better acoustic insulation.

Abstract: An improved roll-up type Venetian blind is made up of an upper bracket and a plurality of roll-up slats. The upper bracket has a C-shaped receiving groove opened up downward and has a pair of cord passage holes at the left end and the right end respectively thereof. An adjustment unit is disposed on a front side wall of the left end of the upper bracket. Each roll-up slat is made up of a pair of flexible hook connectors that are reversely and integrally bound together to form a hollow chamber therebetween for ventilation. A number of partition plates are horizontally placed in the hollow chamber. Each hook connector has an upper pivot hook end and a lower pivot hook end. The upper pivot hook end is smaller than the receiving groove but is larger than the opening of the receiving groove whereby the assembly of the Venetian blind becomes ready and fast, saving time and labor in one aspect and the dissipation of heat of the Venetian blind is greatly advanced in another aspect.

Abstract: A screen assembly for a door opening to a cargo bay area has mounting tracks for attaching around the top and opposite sides of the door opening. A screen panel of pliable material has a shape and dimensions substantially matching those of the door opening. A bead extends along at least part of each of the opposite side edges and upper edge for engagement in the track to secure the panel in the opening. The panel has a central portion which can be rolled up and stored out of the way for access to the cargo bay.

Abstract: An upper end of a flexible door or curtain is attached to an overhead support member while a lower portion of the curtain is disposed on and connected to an elongated horizontal tube along its length. A combination electric motor and gear box is connected to a first end of the tube for rotating the tube in a first direction for rolling the curtain onto the tube and raising the curtain and tube combination, or for rotating the tube in a second, opposed direction for unrolling the curtain from the tube and lowering the curtain and tube combination. Attached to the electric motor/gear box combination is a carriage or roller assembly which engages and rides on a generally vertical guide rail or runner during raising and lowering of the curtain. The engaging force between the roller assembly and the guide rail is adjustable to prevent binding of the curtain as it is rolled up onto or removed from the tube.

Abstract: A flexible cover is rolled from a second longitudinal edge of a trailer opening, over spanning members, and any load held in the trailer, to an opposite first longitudinal edge. A harness, which may be a "V"-shaped pair of ropes, is mounted to a mid-point along a longitudinal free edge of the flexible cover. The opposite edge of the flexible cover is fixed to the first longitudinal edge of the trailer. The harness is sized so as to be positionable laterally from the second longitudinal edge to the first longitudinal edge of the flexible cover, across, so as to lay on and extend laterally from, an upper surface of the flexible cover when the flexible cover is unrolled so as to be deployed across the trailer opening. When the flexible cover is rolled-up the harness is correspondingly rolled-up in contact with the upper surface of the flexible cover in the storage position.

Abstract: A method of providing secure attachment points for a rollable tarpaulin cover used in open top trailers is provided. This is accomplished by the use of cleats attached to the leading edge of a tarpaulin roll tube or shaft. These cleats engage a gear cog mounted to the side of the trailer when the tarpaulin is fully deployed. This arrangement provides additional points at which the tarpaulin can be secured to the trailer to provide a tight seal over the top of the trailer.

Abstract: A flexible partition includes a curtain secured to a support structure at its topped edge and a shaft secured to the curtain displaced from the top edge and extending across the curtain. A driver is coupled to the shaft to rotate the shaft, thereby rolling and unrolling the curtain. A carriage connected to one end of the driver cooperates with a guide to restrict the rotation of the first end of the driver. The guide is pivotally coupled at one end to the support structure to move between raised and lowered positions.

Abstract: A rolling device that is fixed to a laminar material and is capable of rolling and unrolling the laminar material arranged around a shaft of the device, the device including an arm normally extending from the shaft and freely rotatably connected to the shaft, the arm including a motor to rotate the shaft.

Abstract: An information and advertising display uses a self-coiling display media that can be mounted, for example, in the price strip on a shelf, or on a shopping cart. The display media is a plastic material that is self coiling, coiling from bottom to top of the display, so that the display media will roll itself up after being pulled down and then released. The display media is securely fastened to a mounting bracket at one end and is attached to a tube at the other end. A pull-down handle is loosely mounted in the tube so that the display media will coil around the tube when released.

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 cord guide unit 2 for a roll-up blind 4 having a top rail 6 in the form of an extruded section. The guide unit 2 is moulded from a plastics material and is dimensioned to frictionally fit within an end 20 of the top rail extruded section 6. The guide unit 2 includes side walls 23, 24 which are joined by two intermediate sections which provide upper surfaces joined to end surfaces by curved surface portions for guiding the travel of a cord for operating the blind through 90.degree.. An aperture 52 is provided between the two intermediate sections for the passage of a loop of the cord. An end flange 22, which provides a closure for the end 20 of rail 6, is spaced from one of the intermediate sections thereby providing another aperture 54 within which is mounted a pivotal cord wedging element 56. A draw section of the cord passes through aperture 54 and can be selectively wedged against an end surface of the adjacent intermediate section by wedging element 56 to hold the blind in a rolled-up position.

Abstract: A drum for rolling up and unrolling protective covers has a driven pendulum within for applying a rotary moment to cause the drum to roll. The pendulum is powered in one rotary direction or the other by an electrical motor according to a signal from outside the drum, and battery packs are enclosed with the drive elements to provide a power source. A sealed drum is provided to float in swimming pools. In another embodiment, a common electric drill is used for the drive mechanism.

Abstract: A roll-up apparatus including a curtain suspended within a room to be divided or partially closed off and a roll member at the bottom edge of the curtain around which the curtain winds and unwinds. The curtain is raised by rolling the curtain up from the bottom around the roll member, and lowered by unrolling the curtain from around the roll member. Belts spaced along the width of the curtain are looped under the curtain wound roll member and windably attached to a motor driven take-up shaft. When wound around the take-up shaft, the belts are pulled upward to effect a rolling of the curtain around the roll member that raises the curtain. The belts are structured, such as by the provision of a coating material, to adhere to the material of the curtain to prevent belt slippage relative to the curtain and to thereby effect a relatively tight curtain winding. Crowned rollers which achieve a self-centering effect on the belts are also provided to cause the belts to wind about themselves on the take-up shaft.

Abstract: An improved roll-up closure utilizing a flexible cover or curtain selected from a material suitable to effect the type of closure sought. The cover is at least as wide as the portal to be covered and is typically longer than the portal. Each lateral margin of the cover has a strip of hook and loop fastener material affixed thereto, and a complementary strip is affixed to the lateral margins of the structure defining the portal. A first end of the cover is rigidly affixed across a first margin of the portal. The opposite end of the cover can be upturned and connected to a driven take-up roller mounted to the first margin of the portal. In this embodiment, an elongated transverse rod is supported within the upturned end of the cover. In an alternate embodiment, the opposite end of the cover is attached to an elongated transverse rod such that as the curtain is raised or lowered, the curtain is wound or unwound around the rod, respectively.

Abstract: An apparatus and method for stretching and installing a flexible face sign panel is disclosed. A frame-like trolley structure is provided which is positioned on a frame structure, preferably on a service station canopy fascia. A roll of sign panel material is positioned on a spindle which is held in place on the trolley frame structure by a pair of collar members. A roller member is provided to assist in applying the material onto the face of the frame structure. One of the collar members is adapted to firmly hold the spindle from rotating under certain conditions. A handle member is provided to allow rotation of the spindle and thus tightening and stretching of the flexible face sign panel. A plurality of clamping members are provided on the frame structure to lock the trolley in position as desired along the frame structure while a portion of the sign panel is being stretched and installed.

Abstract: An apparatus and method for stretching and installing a flexible face sign panel is disclosed. A frame-like trolley structure is provided which is positioned on a frame structure, preferably on a service station canopy fascia. A roll of sign panel material is positioned on a spindle which is held in place on the trolley frame structure by collar members. A roller member is provided to assist in applying the material onto the face of the frame structure. One of the collar members can be adapted to firmly hold the spindle from rotating under certain conditions. A handle member is provided to allow rotation of the spindle and thus tightening and stretching of the flexible face sign panel. Releasable securing members are provided on the frame structure to secure the trolley in position as desired along the frame structure while a portion of the sign panel is being stretched and installed.

Abstract: A pivoting and sliding closure assembly is provided which rides in a guide channel of a frame upon a pivot shoe assembly which at one end securely pivots a closure member upon one pivot shoe when the closure is pivoted away from the channel, and which latches the closure member in a slidable position when the closure member is pivoted to its latched position. The pivot shoes are connected together by a multiple segment shaft in the assembly and unique rack and pinion structure is incorporated in the assembly.

Abstract: A rolled banner containing confetti in the rolled layers of the banner is disclosed including apparatus for releasing the rolled banner such that the banner may be unrolled upon command whereby a message or other indicia on the banner is displayed simultaneously with the confetti bursting into the air.

Abstract: An aerodynamic, lightweight, flexible material top for enclosing a flatbed of a wheeled vehicle having a front and rear, the top includes a series of inverted, U-shaped supports extending upwardly from and across the flatbed with a first support at the front and a last support at the rear. A flexible material is stretched over the supports and includes a fixed sleeve and a laterally adjustable sleeve which are secured about the first and last supports. At least a portion of the top is pivotally connected as to swing upwardly away from the flatbed to gain access under the top and to the flatbed.

Abstract: The present invention is directed toward an all weather, mechanically reciprocatable, roll top cover apparatus for conveniently and reliably covering and uncovering the open top side of receptacles and the like. The apparatus consists of a support structure mounted at the open top side of the receptacle for supporting a flexible cover and of two primary operating drive devices. The cover is divided into two sloping panels by the support structure to facilitate precipitation removal and to maximize volumetric capacity of the receptacle. The operating drive devices include an uncovering drive device for removing the cover and a covering drive device for replacing the cover. In particular, the cover has one edge fixed at one side wall of the receptacle, while the opposing edge is free to travel between the opposing side walls. The uncovering drive device includes a shaft mounted to the cover centrally. To remove the cover, the shaft is rotated toward the cover's fixed edge to wind the cover on the shaft.

Abstract: A self-powered drum for rolling up and unrolling protective covers has a driven pendulum within for applying a rotary moment to cause the drum to roll. The pendulum is powered in one rotary direction or the other by an electrical motor according to a signal from outside the drum, and battery packs are enclosed with the drive elements to provide a power source. A sealed drum is provided to float in swimming pools.

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 wheeled body (12) is provided having deck (14) with a framework (20) coupled thereto such that the volume outlined by the deck (14) and the framework (20) is unobstructed. The framework (20) consists of two framed ends vertically extending up from the deck (14) and a framed roof therebetween. The ends of the framework (20) can be enclosed by a variety of materials and are attached to recesses (16) in the four corners of the deck (14). The roof and longitudinal sides of the framework (20) are covered by an integrally formed shroud (90) that is secured to the roof of the framework (20). The sides are covered and uncovered by a scrolling mechanism (120) located at each end of the wheeled body (12). Each scrolling mechanism (120) is coupled through a 90.degree. gear knuckle joint (200) to a scrolling rod (122) that is placed into and fastened to a loop (108) formed at the longitudinal edges (110 ) of the shroud (90). The scrolling mechanism (120) vertically scrolls one side of the one piece shroud (90).

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 method and apparatus for rapidly and reliably sealing off a selected opening from an adjacent path of smoke, noxious fumes or contaminated air which comprises a reel of reinforced transparent, temperature, chemical or radiation resistant material having flexible magnetic edge strips on each side thereof mounted and centered above said opening, and causing the reel to drop in vertical fall adjacent to the opening and simultaneously causing the flexible magnetized strips to become rapidly and magnetically attached to ferromagnetic side rails or ferromagnetic door frame used for fire doors and to expand under pressure while maintaining an air tight seal of the opening. This apparatus is elegantly simple and reliable in both its construction and operation and has an extremely high price/performance figure of merit.

Abstract: A barge cover is wound on a roller, mounted on a trolley which may be moved from one end to the other end of a barge hold, deploying or taking up the cover as it moves. The cover may then be sealed around the barge coaming in a weather proof manner. The roller is mounted on trolleys so that two men may deploy or take up the cover with only their muscle power, without requiring either special docking facilities or an independent power source.

Abstract: An automobile covering device includes a hollow cylindrical member having two closed ends, an axial slot and a water outlet. A U-shaped handle has two ends connected pivotally to the two closed ends of the cylindrical member. A cylinder with an axial shaft is received coaxially and rotatably in the cylindrical member. The axial shaft has two free ends which pass through the two closed ends of the cylindrical member, respectively. Two spiral torsional springs are respectively mounted on the two closed ends of the cylindrical member. Each of the spiral torsional springs has a first end connected to one of the free ends of the axial shaft and a second end connected to one of the closed ends of the cylindrical member. A roll of cover cloth is wound on the cylinder and has a pull end passing through the axial slot of the cylindrical member. Two rollers are rotatably mounted on the two closed ends of the cylindrical member, respectively.

Abstract: A method and apparatus for rapidly and reliably sealing off a selected exit way or entrance way from an adjacent path of smoke which comprises providing a reel of fire resistant material and having magnetic edge strips on each side thereof above said exit way or entrance way, and causing the reel to drop in vertical fall adjacent to the exit way or entrance way and simultaneously cause magnetized strips on a fire retardant curtain wound on the reel to become rapidly and magnetically attached to the exit way or entrance way upon the nearby condition of either smoke or fire. This apparatus is elegantly simple and reliable in both its construction and operation and has an extremely high price/performance figure of merit.

Abstract: A cover for window frames that permit a user to selectively choose the frames where the covers will be mounted in an enclosure to protect the inside from the elements. An opening in the canvas that is mounted to the frame is selectively covered and uncovered to expose it. Velcro pads are used to keep the roll up cover sheet attached to the canvas when distended and in the rolled up position when the opening is exposed. String members and diverting roller assemblies are used to readily roll up and down the roll up sheet. A screen is super imposed over the opening to prevent insects from penetrating inside the enclosed structure.

Abstract: An improved temporary window shade (10) that is designed to cover a window opening during the period when a person is awaiting the arrival and installation of a permanent window covering. The shade (10) consists of a non-woven, translucent material (12), having imprinted on its surface a grid (14) of vertical and horizontal lines that allows the material to be accurately and easily cut to size. The material (12) may be attached to either a window (50), a window sash (52) or to a wall (56) that surrounds a window frame (54). The attachment is made by first attaching a material attachment means, such as a two-sided adhesive tape (16), to the attachment structure. The material's upper edge (12c) is then pressed against the two-sided tape to hold the material in place. The shade (10) may bge partially raised by attaching at its lower corners a bendable strip (20).

Abstract: A door structure including a retractable cover which has a rolling up section which is rotated so as to roll up and unroll a portion of the cover. Generally an upper edge of the cover portion is fixedly mounted to a roof portion of a door structure and the lower edge is free. The rolling up section is non-rotatably connected to the cover portion along a center line. Rotation of the rolling up section in one direction rolls up the cover portion and rotation in the other direction unrolls the cover portion. The rolling up section moves up and down respectively with the rolling up and unrolling of the cover portion. The rolling up section can be caused to rotate by toothed wheels at one end engaging with spaced rollers mounted on a framework associated with the cover. The cover portion extends, in a particular arrangement, between two end portions, although only one end portion may be provided.

Abstract: This invention relates to a continuous cord roll up window blind. This continuous cord roll up window blind has an endless cord that engages and causes a sprocket to rotate. The sprocket in turn causes a take up spool to rotate. When the take up spool rotates, a take up cord, which is wrapped around the window covering material, either wraps around or unwraps from the take up spool, depending upon which way the take up spool is rotated. This in turn causes the take up cord to raise or lower the window covering material. A take up cord guide is positioned by the take up cord and, when the window blind is completely rolled down, limits the direction in which the endless cord can be pulled to require that the window blind be rolled up toward the interior surface of the window blind.

Abstract: A tarp assembly for covering an open top of a truck trailer has a tarp with a longitudinal edge fixed to one side of the trailer. A roll bar secured to the free edge of the tarp is rotated with a crank rod to roll the tarp to an open position and unroll the tarp to a closed position. A hold bar fixed to the free edge of the tarp with a plurality of straps is adapted to engage hooks secured to a side of the trailer to hold the tarp in a closed position. The hooks guide the straps and retain the hold bar in alignment for mutual engagement with the hooks.

Abstract: An elongate roller, movable back and forth transversely across the bed of a truck from one side thereof, has rolled thereon a cover sheet which is unrolled and rerolled during the back and forth movement to cover a load in the truck bed. Levers pivotally mounted at opposite ends of the truck carry the roller and are moved by hydraulic power cylinders controlled from inside the cab of the truck. A special chain and sprocket arrangement drives the roller, and a special elastic drawcord and backup plate arrangement at opposite ends of the truck bed secures and seals the cover sheet at such opposite ends of the truck bed.

Abstract: A roll tarp system for covering the open top of a truck semi-trailer, characterized by the use of a novel roll bar construction in combination with an adjustable toggle clamp for locking the tarp in its closed unrolled condition. A rectangular tarp or cover member is connected at one longitudinal edge with the upper edge of one longitudinal side wall of the container. A roll bar is connected with the other longitudinal edge of the tarp via a first longitudinally extending peripheral groove contained in the roll bar. The roll bar includes at least one longitudinally slidable and positionable fastening device arranged in a second groove diametrically opposite the first groove, a cable member being fastened at one end to the fastening device.

Abstract: A capstan based system for pulling and accumulating the pull-cords used to lift hanging window coverings from their bottoms. A cylindrical capstan is supported in bearings so that it is free to rotate and move axially. A splined connection to a holding device permits controlled rotation and locking of the capstan. Each of one or more cords is attached to the capstan by means of a clip which can be easily positioned to adjust the position and length of its cord. As the capstan is turned, the cords wind onto the capstan in a single layer due to the camming action of a specially configured camming surface. The capstan begins to move laterally when sufficient friction has developed between the capstan and the cord which has been wound onto it. This provides space for the cord to wind onto the capstan in a single layer. During unwinding of the cord, a guiding surface, over which the cord moves, pulls the capstan back toward its original position.

Abstract: A headrail for a window blind is formed as an integral extrusion comprising a front valance and including rearwardly of the valance a first upward facing channel for receiving the pulley mechanism and a second downwardly facing channel for clamping the blind edge. A wall between the two channels extends upwardly beyond the channels and then rearwardly and downwardly to provide a flange whereby the headrail can be supported on a suitable hook member.

Abstract: A loading dock seal with an adjustable top seal for providing a weather-tight seal between a loading access opening of a loading dock and vehicles of various heights which includes a compressible pad means surrounding at least the vertical sides of the opening and made of a durable yet resilient material to provide a weather-tight seal on opposite vertical sides between the pad and the vehicle being unloaded. A curtain means, attached at its upper edge above the loading access opening and at its lower edge to a tubular top seal, is of sufficient width to cover the opening. The top seal is vertically adjustable from a storage position above the opening to a sealing position upon the roof of the vehicle thereby combining with the curtain to provide a weather-tight seal between the building and the vehicle.

Abstract: The top closure of the present invention comprises a flexible sheet member sized to fit in covering relation over a top opening of a box. One edge of the sheet member is attached to the upper edge of one of the box walls. A pair of tracks are each positioned at the opposite ends of the box and an elongated shaft extends between the two tracks. The tracks guide the shaft from an open position adjacent one edge of the box to a closed position adjacent the other upper edge of the box. The flexible sheet member is rolled around the shaft when the shaft is in its open position, and the sheet member unrolls from the shaft as the shaft rolls towards its closed position. When the shaft reaches its closed position, it engages a plurality of flaps which are mounted along the edge of the box. These flaps wrap around the shaft as the shaft rotates, and become attached to the shaft, thereby fastening the shaft to the sidewalls of the box with the tarpaulin in covering relationship over the opening.

Abstract: Apparatus for drawing taut a cover sheet over a box opening such as a truck box or a walled building of rectangular plan form provides stop members mounted on a longer sidewall presenting stop surfaces spaced below a longitudinal edge, the surfaces forming a socket for captively seating a tubular or bar shaped roller to which the sheet is tangentially attached. The sheet is fully unwound from the roller in covering the opening, and an overhanging sheet portion is tensioned by a fractional turn of the roller additionally in the unwinding direction, causing the roller to press upwardly against a stop surface engaging the top of the roller and to press inwarldy against a stop surface, with the overhanging portion disposed as a rain-shedding eaves maintaining a seal at the longitudinal edge and terminating under a clamp tangent to the roller.

Abstract: The invention is a horizontally operated door barrier which presents virtually an impenetrable doorway barrier while maintaining ease of personnel access through the portal. The invention consists of a movable vertical spool upon which is wrapped a material or screen for covering the doorway. The spool moves laterally across the doorway, rolling or unrolling the screen wrapped thereon, thereby uncovering or covering the doorway. The barrier can be used to prevent passage of insects, moisture, heat, dust and like environments.

Abstract: A roll up divider has a flexible curtain suspended from its top marginal edge and carrying a cylindrical roll at its bottom marginal edge upon which the curtain is wound and unwound. A plurality of spaced apart webs or belts embrace the curtain as a part of a frictional drive. Each of the belts is wound upon a motor driven shaft and each is provided with a fair lead as a guide mechanism to prevent wandering of the belt as it is being wound.

Abstract: This invention relates to a sealing device for flexible closures for building openings, especially aircraft hangars, gymnasiums, etc. The device comprises elongate flexible sealing gaskets located alongside and substantially coextensive with each of the vertical building members on each side of the opening. The gaskets decline inwardly toward one another and each has a convex outer surface, which is skewed outwardly from the opening. The gaskets contact the flexible door along its vertical edges to seal it when closed and assist in preventing wrinkles or uneven winding of the flexible door on its roller.