Abstract: A casing for a projection screen system that includes a fascia removable from the spine of the casing without the use of tools. The casing is provided with a roll locking hinge formed by a cooperating lip and socket furnished on the fascia and the spine. The roll locking hinge is configured to permit the fascia to be preliminarily mated with the spine when the fascia is disposed in an upwardly rotated arrangement. After the preliminary mating of the fascia with the spine, when subsequently rotated downward relative to the spine, the fascia is locked to the spine by the roll locking hinge, thereby preventing inadvertent fascia removal.

Abstract: A projection screen for displaying projected images with a movable shutter that can be positioned and opened at any location within a large rectangular area of the surface of the projection screen. Physical objects and light signals may pass through the open shutter. When the shutter is closed, the projection screen appears to a viewer as a continuous, unbroken, vertical reflective surface.

Abstract: A practically excellent screen assembly in which a screen may be located at a high level position without any discrete assistance, and leg members provided therefor may be well received in a non-use condition. The screen assembly is characterized in that a screen winding receiver for winding and receiving a screen member, having a flexibility, is provided within a case member having a grip portion. A pair of screen support members for supporting the screen member when the screen member is drawn upwardly are pivoted on right and left sides of the case member. On the other hand, leg members extending downwardly are pivoted on the right and left sides of the case member, and the screen support members and the leg members are formed to have a length so as riot to project from the ends of the case member when the screen support members and the leg members are angularly moved to be attached to the case member.

Abstract: A reflex type screen assembly and a screen assembly which are simple in structure, low in cost, superior in durability, compact in size and superior in storage property and portability in comparison with the conventional example. The reflex type screen assembly, for reflecting a projection beam from a projecting device such as a projector is provided in which a screen winding receiver for winding and receiving a screen member having a flexibility is provided within a case member having a grip portion. A pair of screen support members for supporting the screen member when the screen member is drawn upwardly are pivoted on right and left sides of the case member, on the other hand, the leg members 6 are pivoted on the right and left sides of the case member. The leg members 6 are angularly moved downwardly to support and retain the case member.

Abstract: A system for mounting a picture projection screen between two upright floor-standing speaker units in which the picture screen can be drawn out from one of the speaker units and extended to and attached to the other speaker unit in one position and retracted back into the first speaker unit in another position includes a winding system arranged in the one speaker unit and an attaching system for attaching the free end of the screen in the other speaker unit. The winding system and the attaching system can be arranged to be repositioned so that at top edge of the screen is above the upper surfaces of the speaker units so as to provide access to electronic equipment arranged at a lower level between the two speaker units.

Abstract: The invention relates to an information presentation device which includes a sheet of material rolled onto a drum, with the drum being contained in case. The case includes an area for housing at least one element of a pole, and the housing area also has an opening for loading and unloading the pole elements, which opening has a profile substantially greater than that of a pole element in a longitudinal plane, so as to allow the passage of such an element, and the housing area is disposed relative to the case in such a way that its opening adjoins a slot for the passage of the sheet and such that the slender rigid piece connected to the upper edge of said sheet, in the rolled position of said sheet, at least partially closes the opening of the housing area, thus preventing any unloading of the elements of the pole contained therein.

Abstract: A support assembly for supporting a retractable device includes a frame, at least one arm movably mounted on the frame for carrying the device between a retracted position for stowing the device, and an extended position for presenting the device, and a reactionator couple operatively connected to the arm for resisting, in part, against the arm when it is moved from the extended position to the retracted position, thereby slowing the rate at which the device is retracted.

Abstract: A flat screen receives light from a light projector at a projector location, and reflects the light to a spectator area. The screen has a center, spaced apart upper and lower edges and a pair of spaced apart side edges. The screen includes a multiplicity of reflective elements arranged in a plurality of vertical rows. Each row extends between the upper and lower edges of the screen. The plurality of rows are horizontally spaced and distributed between the pair of side edges. The elements of one row are displaced vertically with respect to the elements of an adjacent row and all of said element lie in a common plane so that the screen is flat. Each element has an optically active convex surface with a vertical generatrix and a curved horizontal directrix which crosses the generatrix at a center of the element.

Abstract: A portable screen assembly for use with a projector has a housing made up of a lower casing and an upper casing pivotally mounted on the lower casing to open or close the lower casing. The housing accommodates a roll rotatably mounted on the lower casing, a screen wound around the roll, a hanger bar to which one side of the screen is connected, and two extension robe assemblies having respective first ends pivotally mounted on the lower casing for movement between folded-down positions and erected positions generally perpendicular to each other. The hanger bar extends parallel to the roll in a spaced relationship when accommodated within the housing, while the two extension robe assemblies extend, when in the folded-down positions, in line with each other in a direction parallel to the roll and in a spaced relationship thereto. A bar clip is mounted on a second end of each of the extension robe assemblies.

Abstract: A reflection-type screen that is free from uneven formation attributable to a weave pattern of a ground fabric as a constituent material, can be wound up in a roll form and unwound at need and is less likely to cause deformation, such as buckling, elongation and sagging, and is easy to handle. The reflection-type screen includes a dimensionally stable substrate sheet having an elastic limit of 60 kg/cm.sup.2 or more, a Young's modulus of elasticity of 2.5.times.10.sup.4 kg/cm.sup.2 or more, a bending modulus of elasticity of 3.5.times.10.sup.4 kg/cm.sup.2 or less, a thickness of 35 to 200 .mu.m and a center line average height and a waviness of 100 .mu.m or less each. Laminated on the substrate sheet in the following order is a high-density light diffusion-reflection layer and a translucent light diffusion layer including a soft vinyl chloride sheet, the translucent light diffusion layer having a surface provided with a light-diffusing fine uneven pattern.

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: An electrically actuated trap door system for a projection screen case. The system includes a trap door having first and second opposing edges. The first edge of the trap door is pivotally connected to the case such that the trap door is movable between a closed position in which the trap door is substantially flush with the bottom surface of the case and an open position in which the second edge of the trap door is disposed within the interior of the housing to form an opening in the bottom surface of the case. A motorized roller rotatable in first and second directions about its longitudinal axis is disposed within the case, and a ribbon connects the trap door and the roller to translate the rotation of the roller into movement of the trap door between its closed position and its open position.

Abstract: A flexible optical surface, film or laminate using a non-rigid support substrate with a sufficient modulus of elasticity defining a controllable surface having a flat state so that repeatedly rolling-up the support substrate into a coiled state does not influence the flat state of the optical surface. The controllable surface can have one or more optical layers secured to the support substrate and use an optical pattern with predetermined optical characteristics to modulate incident light energy. One of the optical layers can be a reflective layer for forming a reflective controllable surface. The predetermined optical characteristic can modulate incident light energy to varying degrees such as by using a differential refraction or gain optical pattern according to the laws of optics.

Abstract: A casing for a projection screen and a motorized projection screen system and method for controlling the same are disclosed herein. The casing includes a fascia and endcaps which are affixed to the casing spine without the use of tools thereby providing easy access to the working components housed within the casing and providing flexibility to the consumer in the appearance of the casing. The motorized projection screen system includes a roller having a projection screen attached thereto and a reversible motor operatively connected to the roller such that rotation of the motor causes the roller to rotate and the projection screen to be raised or lowered. The system also includes a biasing mechanism operatively connected to the roller such that rotation of the roller to lower the projection screen biases the roller toward rotation in the opposite direction. The biasing mechanism reduces the power requirements of the reversible motor of the system as it assists in lifting the weight of the projection screen.

Abstract: A casing for a projection screen and a motorized projection screen system and method for controlling the same are disclosed herein. The casing includes a fascia and endcaps which are affixed to the casing spine without the use of tools thereby providing easy access to the working components housed within the casing and providing flexibility to the consumer in the appearance of the casing. The motorized projection screen system includes a roller having a projection screen attached thereto and a reversible motor operatively connected to the roller such that rotation of the motor causes the roller to rotate and the projection screen to be raised or lowered. The system also includes a biasing mechanism operatively connected to the roller such that rotation of the roller to lower the projection screen biases the roller toward rotation in the opposite direction. The biasing mechanism reduces the power requirements of the reversible motor of the system as it assists in lifting the weight of the projection screen.

Abstract: Viewing screen and display apparatus including a housing for concealing the viewing screen when not in use, and a lifting assembly having a pair of lifting arms mounted slidably on a pair of tracks inside the housing and being tiltable outwardly. When raising of the viewing screen is desired, the viewing screen casing is tilted outwardly and a cable is pulled to lift the viewing screen casing to a desired height. The cable may be locked in any suitable position to keep the screen casing in a suitable elevation. The viewing screen, which nornally is rolled up within the casing, includes a magnetic strip which can be used to retain the viewing screen in a proper extended position for use.