Copier-Duplicator

Copier-Duplicator

 

an assembly that makes multiple copies of pictorial material, used in the printing and publishing industry for preparing printing forms with a repeating image, mainly for planographic (offset) printing. Copier-duplicators are capable of producing completely identical copies. This fact is particularly important for color-set forms.

Picture reproduction by copier-duplicator is one of the photo mechanical methods of producing printing forms. The image obtained from a negative or a diapositive is copied several times onto a form plate covered by a light-sensitive layer.

The plate is laid on a bed above which there is a carriage supporting a light source (an arc light or a concentrating lamp) and a frame holding the material to be copied. Upon exposure, the frame with the original is pressed tightly against the form plate by a hydraulic or pneumatic device. The surface of the plate, with the exception of the area to be exposed, is automatically covered by a shutter. The light source is then switched on.

Exposure time and light are controlled by an exposure meter. After completing the first step, the bed is lowered, the carriage is moved to the next area of the plate, and the second operation begins.

The bed and carriages are moved manually; two handwheels control vertical and horizontal motion. The images on the form plate are positioned precisely by setting the frame and carriage against graduated scales and an indicator (according to previous calculations).

In automatic copier-duplicators, all movement, light switching, and light metering operate according to a program built into the control equipment. Copier-duplicators can have either horizontally or vertically arranged plates and mounting frames. Copier-duplicators lower the volume of photographic work and retouching, reduce the consumption of photographic materials, and assure a high degree of accuracy in preparing large-format print forms.

REFERENCES

Avtomatizatsiia ν poligrafii. Moscow, 1961. (Collection of translations.) Gudilin, lu. N., and K. F. Izmailov. Oborudovanie dlia izgotovleniia pechatnykh form. Moscow, 1971.

S. I. TORGOVNIK

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His second book, Envisioning Information (1990), includes such arresting images as an exploded diagram of an IBM copier-duplicator, in which 300 parts are kept in their relative positions but separated and labeled.
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It added that the copier was perhaps the easiest to operate of all the copier-duplicators Buyers Lab has tested to date.
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Danka, one of North America's and the United Kingdom's largest independent distributors of automated office equipment, will be selling the new Kodak ImageSource 85 copier, as well as the Kodak 3100 duplicator and the Kodak 2085 copier-duplicator.
BLI) ``Pick Of The Year'' award for its Oce 2475 high-volume copier, which was named the ``Most Outstanding Copier-Duplicator of 1994/1995.
We congratulate Oce on BLI's selection of the Oce 2475 as the `Most Outstanding Copier-Duplicator of 1994/1995,' '' said John Stuart, president and CEO of Alco Standard Corp.
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This transaction positions Heidelberg Digital and NexPress as key suppliers of black-and-white copier-duplicators and printers for the principal business segment for whom they will later become key developers and suppliers of color high-speed digital printers," said Patrick T.
Heidelberg will manufacture copier-duplicators, printer engines and related parts to supply NexPress.