Ads
related to: hand pencil drawing duplicator tool
Search results
Results from the WOW.Com Content Network
Unlike a spirit duplicator master, a hectograph master is not a mirror image. Thus, when using a spirit duplicator master with a hectograph, one writes on the back of the purple sheet, using it like carbon paper to produce an image on the white sheet, rather than writing on the front of the white sheet to produce a mirror image on its back.
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.
Duplicating machines were the predecessors of modern document-reproduction technology. They have now been replaced by digital duplicators, scanners, laser printers, and photocopiers, but for many years they were the primary means of reproducing documents for limited-run distribution.
According to the manual, the motor drove a reciprocating needle that could make 50 punctures per second or 3,000 per minute. The user was instructed to place the stencil on firm blotting paper on a flat surface, then use the pen to write or draw naturally to form words and designs as a series of minute perforations in the stencil.
Among the most significant of them was the Blue process in the early 1870s, which was mainly used to make blueprints of architectural and engineering drawings. Stencil duplicators (more commonly known as "Mimeograph machines") surfaced in 1874, and the Cyclostyle in 1891. All were manual and most involved messy fluids.
Parents have organized a protest at a Cracker Barrel in Waldorf, Maryland after special education students were denied dine-in service.
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]
Ads
related to: hand pencil drawing duplicator tool