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An overhead projector ... In the overhead projector, the source of the image is a page-sized sheet of transparent plastic film (also known as "viewfoils", ...
Overhead projector in operation, with a transparency being flashed. A transparency, also known variously as a viewfoil or foil (from the French word "feuille" or sheet), or viewgraph, is a thin sheet of transparent flexible material, typically polyester (historically cellulose acetate), onto which figures can be drawn.
As copying technology advanced, Thermofax machines were subsequently marketed as a method of producing transparencies (viewgraphs) for overhead projector presentations. A sheet of heat-sensitive clear stock was placed on top of the original, and passed through a ThermoFax, producing a black image on the clear stock.
Metal leaf, a very thin sheet of decorative metal; Aluminium foil, a type of wrapping for food; Tin foil, metal foil made of tin, the direct predecessor to aluminium foil; Transparency (projection), a thin sheet of transparent flexible material, placed on an overhead projector for display to an audience
The plant was once used to make copiers and overhead projectors, and the facilities have expanded to focus on the adhesive notepads since 1985. ... as well as cookie sheets, serving bowls ...
In the late 1950s and early 1960s, overhead projectors began to be widely used in schools and businesses. The first overhead projector was used for police identification work. [citation needed] It used a celluloid roll over a 9-inch stage allowing facial characteristics to be rolled across the stage. The United States military in 1940 was the ...
Different markets exist for screens targeted for use with digital projectors, movie projectors, overhead projectors and slide projectors, although the basic idea for each of them is very much the same: front projection screens work on diffusely reflecting the light projected on to them, whereas back-projection screens work by diffusely ...
Nice for midnight infant diaper changes and brushing teeth before the sun is up in the morning when the overhead light is just too much. Shelving and hang drying racks in the laundry room. ~$100 ...
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