Abstract: This invention relates to a folding card that displays one picture when closed and another picture when opened, comprising three hinged panels which form a front cover, a rear cover and an inside panel. Positioned partially in upper and lower channels formed by flanges hinged to the inside cover are a stationary picture unit and a movable picture unit. The picture units are each made of two subunits formed with slots and strips which are fitted together with the strips partially overlapping. The two picture units are mated together, and an extension of the moving picture unit is attached to the front cover. When the assembled picture card is in a closed position, the strips of the movable unit are displayed; when opened, the extension pulls the movable picture unit to the left causing its strips to smoothly slide behind the now displayed strips of the stationary unit as a result of the overlapping construction.

Abstract: A spectral image viewing device incorporates a thin semi-transparent sheet of prismatic polytetrafluoroethylene polymer film, a viewing aperture and an image producing aperture. The device produces a visually perceptible array of spectral images when aligned with a light source. The device can be in the form of an attractive eye-catching desk-top calendar or decoration formed as flattenable pop-up cardboard structures resembling solid polyhedrons having similar polygons as top and bottom supporting panels.

Abstract: Attractive eye-catching desk-top decorations formed as flattenable pop-up cardboard structures resembling solid polyhedrons have similar polygons as top and bottom supporting panels. Foldably joined to the sides of each of these polygons are trapezoidal face panels extending diagonally outward with their longer parallel edges foldably joined to corresponding edges of mating trapezoidal face panels extending outward from the other polygon, forming an equatorial plane polygon similar to but larger than the top and bottom polygon panels. Internal glue tabs extending inward in the equatorial plane are urged toward each other by elastic bands, popping the flattened structures into their erect condition. Internal guide flanges formed by or cooperating with the glue tabs arrest and block the inward flexing movement of the trapezoidal face panels as the desired erect polyhedron shape is reached, stabilizing and rigidifying the structures to provide a prolonged useful life.

Abstract: A self-erecting pop-up stationery display structure assembly bonded to an underlying stationery sheet supports a display panel positioned overlying the stationery sheet. The collapsible self-erecting support has a central panel spanning the space between the stationery sheet and the overlying display panel, with first and second end panels joined to it by respective first and second fold lines, the first being formed of resilient elastomer leaf spring sheet material with a preformed angular bend formed therein. A collapsing force causes the central panel to fold toward the stationery sheet, elastically deforming the preformed angular bend in the resilient elastomer sheet. Removal of the collapsing force releases the deformed angular bend, which returns elastically to its preformed bend configuration, positioning the display panel in a deployed position spaced from the stationery panel.

Abstract: A folded stationery piece has a three-dimensional pop-up message displayed along an internal fold line, formed by an arrayed sequence of letters with the spaces between them removed. The letters and bridge webs joined to their upper edges are both hinged to the stationery panels, forming a collapsible parallelogram structure. The message display can be formed as a separate insert, to be adhesively mounted along a fold line of any piece of stationery by the user.

Abstract: A multi-page folder having a staggered array of interleaved pages successively flipped by manual actuation of a drawstrip. The folder includes a back cover panel bounded by a right fold line joining it to an overlying contiguous base panel, a central slot formed near the fold line joining the back panel and the base panel, a distal segmented tab extending from the base panel away from the right fold line, a plurality of substantially parallel fold lines traversing and subdividing the tab into plural segments, an elongated drawstrip joined to the last tab segment most remote from the right fold line and extending between the back cover panel and the base panel through the central slot longitudinally movable from a retracted position substantially flattening the segmented tab to an extended position protruding through the central slot beyond the right fold line and curling the segmented tab under the base panel toward the slot.