Abstract: A penetrable flexible strip closure for covering an opening includes an extrusion secured across the upper end of the opening as a header. The extrusion provides a continuous open ended T slot and individual clamps for each strip extend through generally central openings in the strips, which overlap at their side edges, and have enlarged heads received in the enlarged portions of the T slots. Releasable securing members are provided on the shanks of the clamps, which extend out the reduced size slot portions of the T slot, to clamp the lapped upper ends of the flexible strips against a bearing portion provided on the extrusion.

Abstract: A negative pressure method and apparatus for protection from airborne asbestos and other particulate contamination is disclosed, including an enclosure with doorways and decontamination chambers with an air intake through the decontamination chambers with at least one filtration unit flow connected with the enclosure, with a blower to pull air into the filtration unit and dispelling the filtered air to the atmosphere. A high volume air flow intake is maintained with a significant negative air pressure in the enclosure. A filtration device is provided with multiple entrance ports providing for a large flow of air through the body of the room together with individual entrance ports to receive the discharge from separate vacuum cleaners.

Abstract: An improved, low cost conditioned air vestibule for use on a doorway of a refrigerated storage room permits unobstructed passage of vehicles while effectively reducing the exchange of air through the doorway and substantially eliminating precipitation both inside and outside the doorway by providing spaced inner and outer movable doors in a portal and extending across the doorway to define a closed entrance vestibule, and circulating conditioned air through the vestibule. Heated air is directed downwardly from adjacent the top of the doorway through the vestibule along substantially its full width and adjacent the surface of the inner or cold side door and air is withdrawn from the vestibule at the top of the doorway adjacent the outer or warm side door. The doors are spaced close together and actuators are provided for opening and closing both doors simultaneously to permit unobstructed passage of vehicles.

Abstract: An environmental curtain for closing a doorway, including elongated, flexible strips having their upper ends formed into loops and a curtain support extending through the loops to suspend the flexible strips within the doorway. The upper end portion of at least one of the flexible strips has a head, a neck which is narrower than the head, and an opening. The head can be inserted through the opening to place the neck within the opening to quickly and easily form the upper end portion of that flexible strip into a loop.

Abstract: A strip curtain for use over the opening of a display case comprising an elongated upper mounting member, a plurality of elongated flexible strips and a lower mounting member. Each of the strips includes a bead adjacent an upper end and the upper mounting member has an elongated groove for slidably receiving the beads so that the strips can extend from the upper mounting member with the longitudinal edges of the strips being adjacent. The lower ends of the strips are attached to the lower mounting member. An upper mounting member with the strips attached thereto can be hung on an adjacent mounting member to provide a large opening through the strip curtain for loading the display case.

Abstract: The hanging device comprises rigid strap hanging members to which the straps are secured, each formed at its upper part with transversally spaced hook-shaped openings to be hooked on transversal hooking members identically spaced arranged within a rigid suspending hollow girder having the shape of an inverted U.

Abstract: The power operated bi-fold strip curtain door assembly is well-suited for doorways and openings to conserve energy and has applications, as an example, in the car wash industry and in industrial plants. Strip curtain supporting inboard and outboard sections are hinged together at next adjacent side edges in side-by-side relation. The inboard section is suspended from an overhead track by a carriage guidingly engaged with the track. A fluid power actuator, when energized, operates to fold and extend the door sections to respectively open and close the strip curtain door. One of the door sections has a side edge strip curtain upper horizontal hem portion reinforced such that its vertical border portion extends laterally in the plane of the strip door section a predetermined distance therebeyond. With the bi-fold door extended, the border portion is moved into overlapping flush relation to the neighboring strip curtain section providing a seal therebetween.

Abstract: A curtain comprised of a plurality of individual separable strips is provided for use across the front or top of a display type refrigerator such as used in supermarkets or the like. A sufficient number of strips are attached along the upper edge of the cabinet opening to span the width of the opening, each strip being of a length sufficient to span the length of the opening. Each strip detachably connects to the cabinet and is also detachably connected to one another whereby one or more strips may be removed from the cabinet and attached piggy back fashion to one or several strips for loading and unloading the refrigerator.

Abstract: A strip-type door having a plurality of individual strips arranged in overlapped relationship one to another comprises a series of swingable supports on which the individual strips are vertically suspended when the latter take a vertical position. A mounting element connected to a lintel over the door opening has a mounting portion, a supporting bar and an arcuate wall defining an arcuate channel. Each of the supports is formed with a curved portion insertable into the channel in the mounting element to form with this wall a hinge about which the supports carrying the individual strips can swing relative to the mounting element between a plurality of positions. The curved end portion may be inserted into said channel in only one of these positions so that the inadvertent falling or removal of the supports out of the channel when the strips are in their working swingable positions is prevented.

Abstract: An environmental curtain constructed of flexible, transparent plastic strips suspended in an opening to function as a thermal barrier. The plastic strips are arranged in a partially overlapping relationship. Each strip is defined with one end having each corner cut out to an extent for producing a central solid portion. The solid central portion of the strip may be provided with a row of spaced apertures arranged adjacent one end of the strip. An inner row of spaced apertures are arranged in vertical alignment with the outer row to permit a temporary suspension loop for the strip to be defined when the inner and outer rows of apertures are aligned in overlying relationship and secured together. The strips may include side flaps adjacent the central loop that extends below the strip suspension means and allow the relative position of the adjacent strips to be changed while still suspended by the suspension means.

Abstract: A weather door suitable for commercial garages and warehouses made from sheets of flexible plastic having a length at least twice the height of the doorway to be covered and in which the sheet of plastic is slit in such a way so that when it is folded in the middle, a series of strips of the plastic can be interleaved to present a weather barrier when hung across a door opening that will part around a vehicle or other object or a person entering or leaving the doorway.

Abstract: An acoustic insulation curtain is composed of a number of long, relatively high mass optically transparent acoustic barrier sheets, having longitudinally extending central portions covered with panels of acoustic absorber material. The adjacent barrier sheets overlap one another. In some embodiments they are mutually spaced and also overlap portions of absorber panels of adjacent sheets. Absorber panels may be vertically discontinuous in a staggered relation from one panel to another to provide a circuitous sound absorbing air flow path from one side of the curtain to the other.

Abstract: A window blind slat having a longitudinal axis includes a number of substantially flat, rigid, vertically extending slat sections, including at least a top slat section and a bottom slat section, each having a vertical, substantially planar face, an upper end and a lower end and means hinging the lower end of one slat section to the adjacent upper end of the next lower slat section, the sections being disposed to one another such that the tendency of the slat to vary so as to distant the longitudinal axis of the slat will be rendered incapable of esthetically or functionally interfering with the performance of the slat.

Abstract: A door through which vehicles can pass and which is foldable and flexible and which is particularly suited for carwashes. The door is suspended from a track by rollers movable along the track, and is opened by actuating a pneumatic cylinder, and closed by means of a counterweight. The door preferably comprises two flaps which are sealed where they meet in the middle of the doorway by means of hook and loop strip release fasteners. A wand or other vehicle sensor may be provided for actuation of the pneumatic cylinder.

Abstract: The individual strips of a plastic strip door hang by clips having a downwardly facing U-shaped portion which snap within an upwardly facing U-shaped portion on a support member so that strips may be easily installed and replaced.

Abstract: A door composed of multiple strip of the type comprising a support with hooks and strips provided with means for hooking to said support, wherein the support takes the form of a channel whose transverse section is in the form of an inverted C, in the base of which are arranged hooks known per se whose ends constitute a guide with the corresponding edge of the channel with a view to receiving a panel which closes the hooks.

Abstract: A transparent, flexible curtain with spaced access slits is provided for installation across the opening of display-type, open front and open top coolers, freezers and the like of the sort used in retail food stores. The curtain is comprised of a rectangular sheet of flexible, transparent material secured at one end to the top or rear edge of the cooler cabinet and extending across the cabinet opening. The curtain is formed with a plurality of spaced parallel slits, all extending in the same direction and all originating and terminating within the margins of the sheet. The curtain retains cold air within the refrigerator and allows the food products to be clearly visible to the customer. Goods are removed by the customer reaching through any slit near the product selected. The forward or lower edge of the curtain is weighted in sections to keep the curtain taut across the opening and to allow it to be folded back for loading food into the cooler.

Abstract: A flexible multi-strip closure is supported in a vertically hanging position by means on horizontally oriented structural beads attached to each strip, which beads are retained in a horizontally oriented, inverted U-shape channel which includes an entrapment portion for supporting the beads against vertical forces and at least one lip to eliminate stress concentrations in the flexible strips when they are flexed. Releasable means are provided adjacent at least one end of the channel to restrict horizontal movement of the beads and to allow removal of the beads with their attached strips for cleaning and replacement.

Abstract: A transparent, flexible curtain with spaced access points is provided for installation over the opening of a display type open refrigerator of the sort used in retail food markets. The curtain is comprised of a plurality of elongated, flexible, transparent panels secured at one end to the top or rear edge of the refrigerator cabinet and extending in overlapped relation across the cabinet opening. The edges of the panel are tubular and a colored sleeve may be added to make access points between adjacent panels more readily visible. The curtain retains cold air within the refrigerator and allows the food products to be clearly visible to the customer. Goods are removed by the customer reaching in between adjacent panels which separate easily and return to a closed position when the customer's hand is withdrawn.

Abstract: A bumper strip is employed for obturating an opening. A plurality of such bumper strips may be suspended in depending overlapping relationship in an opening to close the same. Alternatively, the closure may be provided by mounting a plurality of such closure strips on a hinged door arrangement. The bumper strips protect the opening and are preferably transparent. The transparency is protected by having ribs arranged to receive the impact of objects passing through the opening whereby the faces of the strips are protected from abrasion. The strips may be suspended in depending relationship by angles provided with studs which pass through the strips and which receive retaining devices clamping the strips thereon. The studs may be supported on a slidable strip which is accommodated in a track.

Abstract: A strip curtain door is adapted for positioning across a door opening having a header with a curtain rod spanning the opening at the top thereof. Hanger brackets support the rod and are secured to the header. A series of spaced opposed pairs of arcuate clips are loosely mounted upon the rod, each clip having a depending finger. A series of upright flat flexible strips of plastic material have their adjacent edges overlapped, extend across the opening over the height thereof with upper portions of each strip projected between a plurality of the pairs of clips. A fastener extends between the fingers of each pair of clips and through the strips whereby the fingers of the clips compressively engage and support the strips. In a modification, one finger of each pair of clips has a transverse dimple, with the other finger having an opposing transverse hole therethrough. Securing of the clips together forms a dimple in the strip which is projected into the finger hole for interlock therewith.

Abstract: A curtain is provided for use across the doorway of a garage, or the like, through which vehicles may pass easily but which substantially blocks out ambient weather conditions. The curtain provides a barrier which retains building heat during the winter and cool air during the summer and reduces entry of cold air in the winter and warm air in the summer. The curtain is comprised of a single main panel suspended across the upper portion of the doorway and a plurality of a relatively narrow, overlapping strips suspended from the lower edge of the fixed panel. Wide strips and/or one or more layers of narrow strips are provided at the sides to reduce heat transfer through the sides of the curtain. A breakaway line extends across the mid portion of the doorway opening to prevent the curtain from billowing inward in the event of unusually high wind gusts.

Abstract: A flexible strip door comprising a plurality of relatively long transparent sheets of heavy gauge plastics material of relatively narrow width as compared to their length, hung in overlapping fashion to close the exit of a car wash, the sheets alternatively displaying concave and convex surfaces to the interior of the car wash, and soft non-abrasive material secured by gluing or sewing to the inwardly facing concave and convex surfaces from a position intermediate the ends of the sheets to a position below the lowermost edge of each sheet to permit viewing of the driver of a vehicle passing through the car wash through the sheets, but prevent marring the finish to the vehicle passing through.

Abstract: Strips of heavy transparent plastic are suspended in a doorway with the edge of each strip overlapping an adjacent strip to completely close the doorway in a manner which minimizes heat transfer through the doorway while permitting hand-free movement through the door. The strips are suspended by loops formed on the upper end of each strip. Various loop constructions and overlap arrangements are disclosed to facilitate the mounting of the strips.

Abstract: A doorway screen has a support extending transversely above a doorway opening. A plurality of individual flexible plastic strips or panels are at their tops secured to and suspended from the support. The strips or panels are formed to have in horizontal cross-section a relatively thin, straight central portion merging at the end edges with relatively thick bulbous or enlarged bead ends. The strips or panels are disposed to overlap each other with each of the end edges of one strip in abutment with the straight portion of an adjacent strip to define discrete pockets between adjacent end edges.

Abstract: A flying insect deterring screen composed of flexible tapes or strips suspended over an entry to a closed environment, wherein fluctuation throughout the length of the tapes is initiated by a prime mover acting at the points of suspension thereof. The prime mover initiates various types of fluctuating movement at the suspension points such as reciprocatory, oscillatory, circular and swirling motion, which motion is transmitted in waves to the lower end portions of the tapes.

Abstract: Suspension for curtain of plastic strips comprises a beam having a U-shaped section and longitudinally spaced transverse slots. T-shaped hook members are attached to the tops of the plastic strips and extend through the slots so that the cross-bars of the T-shaped hooks rest on the inside of the beam on opposite sides of the slot.

Abstract: Stairway safety suspension support means that includes overhead means and extending along the stairway above the flight of stairs, from which are suspended successively a plurality of depending loops of flexible strand means with the bottoms of the loops located above the steps less than the heights of people, and also means which dictate that the planes of those loops are oriented generally longitudinally along the stairway.

Abstract: A bead curtain comprises a plurality of strings of beads and a plurality of decorative shells each enclosing a selected one of the beads.

Abstract: A radiation shield in the form of a stranded curtain made up of bead-chains whose material and geometry are selected to produce a cross-sectional density that is the equivalent of 0.25 mm or more of lead and which curtain may be mounted on various radiological devices to shield against scattered radiation while offering a minimum of obstruction to the radiologist.