Page 151 - DLIS006_INFORMATION SOURCES AND SERVICES

Information Sources and Services

Notes
Figure 7.3: Copier-duplicators: The Xerox 9500 Duplicator

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Copier Supplies and Maintenance

Copier equipment vendors will generally train a few employees in any organization as key
operators. These operators, who may be secretaries, are responsible for maintaining the paper
supply, adding toner and developer and clearing paper jams.
Paper is either sheet fed or roll fed into the machine. With sheet-fed copiers, the paper is usually
placed in a tray or cassette in the machine. Some machines feature interchangeable, removable
cassettes for different-sized paper, such as legal and standard size. With roll-fed copiers, the
machine cuts off only as much copy as is needed; the machine may or may not match paper size
to your original, depending on its particular features.
Toner, which is a derivative of carbon black, provides the darkness of imprint. If your copier is
producing light copies, it may need more toner, which comes in cartridges or bottles.
Toner is classified as two-component or mono-component. With a system that uses a separate
toner and developer, two-component toner is required. Mono-component toner combines both
toner and developer so that only one cartridge of toner is needed.

7.5.4 Duplicating Processes

The “duplication” category of reproduction includes spirit, stencil, and offset processes. Although
spirit and stencil were the most popular processes of the fifties and sixties, the seventies saw
copiers taking over. Convenience copiers became favoured for low-volume duplicating, and
copier-duplicators gained as the favoured duplication processes for large jobs. Stencil and offset
processes, however, continue to be economical alternatives for high-quality copy—especially
with the introduction of convenient tabletop models.

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