Abstract: Apparatus for duplicating microfiche, which is of moderate cost yet which operates rapidly to make duplicates of high quality from both jacketed and unjacketed microfiche. A relatively uniform and collimated light source is provided for use with jacketed microfiche, by utilizing a bank of fluorescent aperture lamps and a bank of cylindrical lenses between the lamps and microfiche, with the side of the lenses closest to the microfiche being flattened and with the lenses having baffles of lower index of refraction than the clear segments of the lenses. A developing station for holding gaseous ammonia or other developing medium, is sealed by an inflatable seal.

Abstract: A guide means is provided for guiding diazotype copy sheet material through a developing apparatus over and in contact with a pair of rotatable applicator rollers positioned in axially spaced apart parallel relation. Developer liquid is supplied to the surface of the rollers for developing the copy sheet. The guide means includes a first and a second set of fine, filament-like guide wires strung taut across the rollers in the direction of movement of the sheet material through the developing apparatus. The guide wires of each set are positioned in spaced apart parallel relation, and the wires of one set are offset axially from the wires of the other set. The guide wires prevent the sheet material from becoming wrapped about the applicator rollers during passage of the material through the developing apparatus.

Abstract: Apparatus is provided for developing diazotype copy material by the application thereto of a quantity of liquid developer and comprises a heated enclosure for housing a pair of rotatable applicator rollers positioned in axially spaced apart parallel relation. Developer liquid is supplied to the surface of the rollers, and a pair of blade members is mounted adjacent each of the rollers for engagement therewith. One of the blade members of each pair meters the developer liquid on the roller and the other blade member forms a developing zone through which copy sheets are passed to be developed.

Abstract: A developing station for developing microfiche includes a pair of closely spaced walls, an inflatable tube defining the developing region of the station, a system for inflating the tube to seal the region, and a member for transporting a copy sheet into the region. The transporting member is withdrawn from the region during the developing step and moved back into the region subsequent to the developing step to transport the copy sheet from the developing region.