Abstract: An exposure system for creating a single frame transparency having an enlarger rack with a transparency fixture. The fixture includes an inner and outer frame which cooperate to allow incremental relative movement therebetween during an exposure process which results in a single transparency having four independent images, each of the images having spaced apart groups of pixels interlaced with the groups of pixels from each of the other images, each of the images being selectable for projection by a movable grid mask. A method for preparing four images from a single transparency is also disclosed. The transparency is formed by sequentially exposing portions of a sheet of film overlayed by a gridlike mask, and correspondingly repositioning the mask after each exposure such that a new interlaced area of film is exposed.

Abstract: A display apparatus having a transparent image screen which contains a mosaic of four discrete images formed from pixels which are interwoven in a predetermined arrangement such that each of the images are selected by precise positioning of the screen in four different positions relative to a grid mask which masks out all but pixels of a selected image. A platen comprising a platen surface which is supported by a rib structure mounts the image screen and is moveable through a precise pattern for selecting the pixels, and thereby the image, to be projected. A pair of arms are coupled to the platen and an eccentric drive and are driven by the eccentric drive to advance the platen positively through the pattern.

Abstract: A display system having a single-frame transparency which contains four independent images, each of the images having spaced apart groups of pixels interlaced with the groups of pixels from each of the other images, each of the images being selectable for projection by a movable grid mask, is provided. A method for preparing and displaying four images from a single-frame transparency is also disclosed. The single-free transparency having interlaced groups of pixels from four individual images is formed from four individual transparencies having a copy pattern formed thereon, the copy pattern being divided into spaced apart square shaped groups of pixels defining a matrix of translucent optic segments.

Abstract: A shuttle display apparatus including a base formed with multiple sets of pairs of parallel lateral tracks connected together on their opposite ends by respective longitudinal shuttle tracks. Display panels are racked together for translinear travel progressively in such lateral tracks to selectively display, in coplanar relationship, the respective front sides of a pair of such panels in one direction and to thereafter selectively display the back sides of such panels in coplanar relationship in the opposite direction. A drive is provided for automatically advancing a pair of panels along a pair of lateral tracks and then shuttling one panel of the pairs to an adjacent pair of lateral tracks to dispose such pair of panels abreast of one another in a coplanar displaying position for displaying composite messages in one direction or another.