Epson LQ-860 User Manual - Page 312

paper-out sensor A small switch behind the platen that sends a signal when it is not in contact with paper, informing the printer and remote computer that there is no paper loaded, and causing the PAPER OUT light to go on. paper tension unit The part of the printer that fits above the platen to assure proper paper tension in the printing area. parallel interface An interface that connects the computer and the printer. A parallel interface transmits data one character or code at a time. See also serial interface. parity Parity is a method for a computer and printer to check the reliability of data transmission. platen The black roller that provides the backing for the paper during printing. print quality Your printer has three types of print quality; draft, high-speed draft, and Letter Quality. Draft and high-speed draft are for high-speed, draft quality jobs; Letter Quality is used to produce more polished documents. proportional printing Printing in which the character width varies from character to character. For example, a capital W receives much more space than a lowercase i. The result looks more like a typeset book than a typewritten draft. pull tractor unit An optional device that feeds continuous paper and multi-part forms through the printer. Glossary 7