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A mimeograph machine (often abbreviated to mimeo, sometimes called a stencil duplicator or stencil machine) was a low-cost duplicating machine that worked by forcing ink through a stencil onto paper. [1] The process was called mimeography, and a copy made by the process was a mimeograph.
A school newspaper published using a ditto machine in 1978 A hand-cranked spirit duplicator from the 1960s. The duplicator uses two-ply "spirit masters", also called "master sheets". The first sheet can be typed, drawn, or written upon. The second sheet is coated with a layer of wax that had been impregnated with one of a variety of colorants.
As the new master is burning it is stored while the old master is removed. There is a clamp plate on the drum that opens by motor. The drum turns and the old master material is fed into the disposal rollers and into the disposal box. The new master is fed into the clamp which closes, then the drum is turned, pulling the master onto the drum.
The cyclostyle was a more automated type of mimeograph machine that produced reproductions faster. In 1893 Francis Galton described a system for sending line drawings through the widely established telegraph system, using simple numeric codes, and printing out the line drawings at the other end from the codes.
A Polygraph is a duplicating device that produces a copy of a piece of writing simultaneously with the creation of the original, using pens and ink. Patented by John Isaac Hawkins on May 17, 1803, it was most famously used by the third U.S. president, Thomas Jefferson , who acquired his first polygraph in 1804 and later suggested improvements ...
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The first commercially available Thermofax machine was the Model 12. The 'layup' of the original and the copy paper was placed on a stationary glass platen and an infrared lamp and reflector assembly moved beneath the glass, radiating upwards. The layup was held in position by a lid with an inflatable rubber bladder that was latched down by the ...
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