xerographic /zear'euh graf"ik/, adj.xerographically, adv.
/zi rog"reuh fee/, n.
an electrostatic printing process for copying text or graphics whereby areas on a sheet of paper corresponding to the image areas of the original are sensitized with a charge of static electricity so that, when powdered with a toner carrying an opposite charge, only the charged areas retain the toner, which is then fused to the paper to make it permanent.
[1945-50; XERO- + -GRAPHY]

* * *

Image-forming process that relies on a photoconductive substance whose electrical resistance decreases when light falls on it.

Xerography is the basis of the most widely used document-copying machines (see photocopier). The process was invented in the 1930s by U.S. physicist Chester F. Carlson (1906–1968) and developed in the 1940s and '50s by Xerox Corp. (then called Haloid). Light passing through or reflected from a document reaches a selenium-coated drum surface onto which negatively charged particles of ink (toner) are sprayed, forming an image of the document on the drum. As a sheet of paper is passed close to the drum, a positive electric charge under the sheet attracts the negatively charged ink particles, transferring the image to the copy paper. Heat briefly applied fuses the ink particles to the paper. The first commercially successful xerographic copier was introduced in 1959.

* * *

Universalium. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Xerography — (or electrophotography) is a photocopying technique developed by Chester Carlson in 1938 and patented on October 6, 1942. He received US patent|2297691 for his invention. Although dry electrostatic printing processes had been invented as far back …   Wikipedia

  • xerography — ► NOUN ▪ a dry copying process in which powder adheres to parts of a surface remaining electrically charged after being exposed to light from an image of the document to be copied. DERIVATIVES xerographic adjective. ORIGIN from Greek x ros dry …   English terms dictionary

  • xerography — ☆ xerography [zir äg′rə fē ] n. [ XERO + GRAPHY] a process for copying printed material, pictures, etc., in which the latent image of the original material is transferred by the action of light to an electrically charged surface to which the… …   English World dictionary

  • xerography — kserografija statusas T sritis chemija apibrėžtis Kopijų gavimo metodas, pagrįstas fotolaidžių sluoksnių įelektrinimu. atitikmenys: angl. xerography rus. ксерография …   Chemijos terminų aiškinamasis žodynas

  • xerography — kserografija statusas T sritis fizika atitikmenys: angl. xerography vok. Xerographie, f rus. ксерография, f pranc. xerographie, f …   Fizikos terminų žodynas

  • xerography — noun Etymology: International Scientific Vocabulary Date: 1948 1. a process for copying graphic matter by the action of light on an electrically charged photoconductive insulating surface in which the latent image is developed with a resinous… …   New Collegiate Dictionary

  • xerography — noun a photocopying process in which a negative image formed on an electrically charged plate is transferred as a positive to paper and thermally fixed …   Wiktionary

  • xerography — SYN: xeroradiography. * * * xe·rog·ra·phy zə räg rə fē, zir äg n, pl phies 1) a process for copying graphic matter by the action of light on an electrically charged photoconductive insulating surface in which the latent image is developed with a… …   Medical dictionary

  • Xerography — Ксерография (способ электрофотографии); Ксерография (способ электрографии) …   Краткий толковый словарь по полиграфии

  • xerography — Synonyms and related words: albertype, book printing, chromotypography, chromotypy, chromoxylography, collotype, color printing, duplication, electronography, electrostatic printing, graphic arts, gravure, halftone engraving, hectography, history …   Moby Thesaurus

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”