Heidelberg and Kodak jointly launch NexPress

The world's largest printing press manufacturers, Heidelberg in Germany and Ismen Kodak in the United States, have established a joint venture company NexPress with the broad prospects of a new generation of presses, and launched the NexPress 2100 press on drupa 2000. . The machine uses powder toner and electrophotographic technology. When a small newspaper with an opening number of 18×11.375 inches is used, 2100 sheets can be printed in an hour, and the NexPress 2100 is named after this. NexPress can handle up to 350 x 470mm paper. A4 paper double-sided 4-color printing speed up to 2100 / hour, single-sided 4200 / hour; A3 paper double-sided 4-color printing speed up to 1050 / h, single-sided 2100 / h. In order to solve the 80-300g/m2 thick paper printing problem, the machine also uses a blanket offset printing process, so it can still be transferred on thick paper and embossed processed unsmooth paper. Next we introduce the working process of NexPress. First, it has three feed trays (see Figure 1). During printing, the paper starts from below the center of the machine to the right, and the first passes through the heavy paper detection device. Then through the paper regulator, it stabilizes its temperature and humidity and senses the color quality of the paper (preprinted or transparent originals will bypass this section). Then, the paper reaches the upper right of the printer and continues to the left into the paper position automatic detection device. After adjusting the position of the paper, it is fed into the upper transfer section of the machine. As shown in Figure 2 Figure 1 Figure 2 Printed imaging part of the principle of the same with the general electrophotography, is to charge the photosensitive drum, the implementation of portrait by the LED imaging head. The powder toner is first attached to the photosensitive drum, then transferred to a blanket cylinder and finally transferred to the paper. The four imaging units are arranged in the order of KYMC. After the 4-color toner is transferred, the paper enters the image fixing device, and the toner is fixed by pressing and heating. In addition, between the fourth, i.e., the cyan unit and the imaging fixture, there is a selectable component - a unit reserved for special toners. Paper exit (see left side of Figure 2), one on each side. The upper part is the outlet of the calibration paper and the lower part is the official printing outlet. The official printing outlet can stack up to 600mm. In duplex printing, the paper first arrives on the left side of the NexPress press, and then the middle section changes to the right, during which the paper is turned over. The press is also equipped with state-of-the-art air conditioning. Air is introduced into the machine from above the imaging fixture, and then goes up from below the units to stabilize and regulate the temperature inside the unit. Currently, post-press processing is usually performed after offline according to the user's requirements. In the design of mechanical structures, the pursuit of simple structures that can be maintained without the need of skilled workers and operating users is also a trend in the development of printing machines. NexPress reflects this trend to some extent. The size of the NexPress model introduced in Drupa is: 5621×2002×1729mm, and the length is more than 5.6m, which is suitable for large-scale paper printing. Compared with the office-used selenium electrostatic printers and Canon models, it can be imagined from the size of its main is mainly for factories and other facilities.