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Three styles of loose leaf graph paper: 10 squares per centimeter ("millimeter paper"), 5 squares per inch (“engineering paper"), 4 squares per inch (“quad paper") Graph paper, coordinate paper, grid paper, or squared paper is writing paper that is printed with fine lines making up a regular grid. It is available either as loose leaf paper ...
Risograph is a brand of digital duplicators manufactured by the Riso Kagaku Corporation, [1] [2] that are designed mainly for high-volume photocopying and printing. It was released in Japan in 1980. It is sometimes called a printer-duplicator, as newer models can be used as a network printer as well as a stand-alone duplicator.
In a typical drum printer design, a fixed font character set is engraved onto the periphery of a number of print wheels, the number matching the number of columns (letters in a line) the printer can print. The wheels, joined to form a large drum (cylinder), spin at high speed. Paper and an inked ribbon are stepped (moved) past the print position.
Narrow ruled paper has 1 ⁄ 4 in (8 ⁄ 32 in, 6.4 mm) spacing between ruling lines, and is used by those with smaller handwriting or to fit more lines per page. Pitman ruled paper has ruling specialized for stenography. It has 1 ⁄ 2 in (12.7 mm) spacing between ruling lines, with a single margin drawn down the center of the page.
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[4] Early pen plotters, e.g., the Calcomp 565 of 1959, worked by placing the paper over a roller that moved the paper back and forth for X motion, while the pen moved back and forth on a track for Y motion. The paper was supplied in roll form and had perforations along both edges that were engaged by sprockets on the rollers.
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