There are many places where one can sell used photocopiers that still work online. There are companies, such as "brkassociates" and "copexinc", that will buy used photocopiers.
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The following websites sell photocopiers online: Xerox, Staples, Office Depot, and Amazon (among others). It is also possible to find listings for used photocopiers through local Craigslist listings or going-out-of-business sales.
A mimeograph machine was a printing device used to make copies of documents by transferring ink onto paper. It was commonly used before photocopiers became widespread in the 20th century.
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The property of selenium used in photocopiers and laser printers is its photoconductivity. Selenium becomes more conductive when light is shone on it, allowing images to be formed and transferred onto paper in these devices.
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Toner is used in laser printers and photocopiers.
Toner is a powder used in laser printers and photocopiers to form the text and images on the printed paper. In its early form it was simply carbon powder. Then, to improve the quality of the printout the carbon was blended with a polymer.
The first inventor of carbon paper is thought to be Ralph Wedgwood, who patented his invention in 1806. Carbon paper was used for making multiple copies of handwritten documents before the advent of photocopiers and printers.
Before rubber was found, materials such as leather, cloth, and various plant-based materials like gum resin were used for similar purposes, such as making footwear, seals, and insulation. These materials were chosen for their flexibility and ability to provide a barrier or grip.
The gestetner device was invented by a man with the last name Gestetner. It is used to "duplicate" objects using a stencil like format and wax as well as other materials.