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The spirit duplicator invented in 1923 and sold by Ditto, Inc., used two-ply "spirit masters" or "ditto masters". The top sheet could be typed, drawn, or written upon.
David Gestetner (31 March 1854 – 8 March 1939) was the inventor of the Gestetner stencil duplicator, the first piece of office equipment that allowed production of numerous copies of documents quickly and inexpensively. He also invented a new kind of nail clipper. Gestetner was awarded the John Scott Medal by The Franklin Institute in 1888.
The Gestetner Cyclograph was a stencil-method duplicator that used a thin sheet of paper coated with wax (originally kite paper was used), which was written upon with a special stylus that left a broken line through the stencil, removing the paper's wax coating. Ink was forced through the stencil (originally by an ink roller), and it left its ...
A spirit duplicator (also referred to as a Rexograph or Ditto machine in North America, Banda machine or Fordigraph machine in the U.K. and Australia) is a printing method invented in 1923 by Wilhelm Ritzerfeld that was commonly used for much of the rest of the 20th century. The term "spirit duplicator" refers to the alcohols that were a major ...
Unlike spirit duplicators (where the only ink available is depleted from the master image), mimeograph technology works by forcing a replenishable supply of ink through the stencil master. In theory, the mimeography process could be continued indefinitely, especially if a durable stencil master were used (e.g. a thin metal foil).
Reproduction of Jefferson's polygraph at the Smithsonian Institution One of the polygraphs used by Thomas Jefferson, a portable version. 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.
In today's Game of the Day, you'll have to explore rooms full of traps and riddles to find your lost pet. Each room presents a new challenge. You'll avoid spikes, destroy enemies, and use crates ...
In 1988, the company acquired Itek Graphix, a leading manufacturer of plate-makers for duplicators (small format offset presses). By the late 1990s, A. B. Dick was a division of the Nesco company of Cleveland. [2] The company filed for bankruptcy in 2004, and its assets were acquired by Presstek, a manufacturer of prepress products. [8]