Electrostatic Imaging Equipment: A Pioneer in the Digital Printing Era
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Electrostatic imaging technology is the first digital printing technology developed. Electrostatic imaging is mainly divided into five steps of imaging, inking, toner transfer, fixing and cleaning. Imaging is by imaging a suitable photosensitive surface and controlling the light source. The printed image corresponds to the position of the light signal on the photoconductor drum. The image of this evenly charged surface is partially discharged, with the result that the areas of exposure and discharge coincide with the desired printed image. After an electrical signal is formed on the photoconductor drum, the electrostatically charged toner is adsorbed by the charge on the photoconductor drum, and after development exposure, the latent image on the photoconductor drum becomes a visible influence of the adsorbed toner.
The toner then turns directly from the photoconductor drum to the substrate. However, in order to transfer the charged toner from the surface of the photoconductor drum to the paper, it is necessary to generate an electrostatic force through a power source, and the toner is transferred to the paper by the supporting force of the contact pressure between the drum surface and the printing material. . However, the toner that has just been transferred to the paper is unstable, and it is usually necessary to melt and fix the toner on the paper under heat and contact pressure, which is why the paper just coming out of the toner copying machine is heated. the reason.
However, for an electrophotographic digital printing device, after the image is fixed on the paper, a process of cleaning the photoconductor drum is required, that is, the electric charge remaining on the photoconductor drum and a small amount of toner particles are removed. Mechanical cleaning and electronic cleaning are generally used. Mechanical cleaning is the use of brushing or pumping to remove residual toner particles; electronic cleaning is done by uniform surface illumination, neutralizing the electric field on the surface, and removing toner particles. This way the photoconductor drum can be prepared for the next print and recharged.
Digital printing machines using electrostatic imaging technology have always dominated digital printing equipment. Previously mature digital printing machines on the market were almost all electrostatic digital printing machines, such as Fuji Xerox's DC8000, iGen3, HPIndigo5500, ws4500, Kodak NexPress2100/2500. , Xeikon5000/6000, OceVarioStream8000/9000 series, Canon imagePRESSC7000VP and so on. Although the development of inkjet printers has intensified, it still cannot keep pace with the development of electrostatic digital printers.
Xerox iGen4 sheetfed digital printing machine
iGen4 is known as the single-sheet digital press with the highest productivity and best print quality in the printing industry. Compared with iGen3, the production capacity has increased by 35%. The purpose of this is to bring more offset printing business to the digital printing camp. It has changed the profit and loss point between digital printing and traditional offset printing, which makes digital printing faster and more economical when printing higher-volume businesses. iGen4 is capable of obtaining offset and photo quality images and continuous colors with speeds up to 110 pages per minute.
Xeikon8000 web color digital printing machine
Punch's latest Xeikon 8000 color digital press, this new model features double-sided 5-color printing capability, width 512mm, imaging accuracy of 240lpi (1200dpi × 3600dpi), speed up to 230 pages / minute (quantitative 100g/m2). It uses PunchGraphix's unique X-8000 digital front-end system to quickly and seamlessly integrate with any workflow. The target market for the device is direct printing, commercial promotional advertising and on-demand publishing.
Kodak NexPress S3600 sheetfed digital press
The Kodak NexPressS3600 production color digital press is the fastest model in the S series, up to 120 pages (A4) / minute, and is a five-color machine with glazing or spot color. The NexPressS series features a modular design that includes up to 11,000 pages of feeder options for up to five different substrates, while the same press has both sheet and roll feeds; output options Supports multiple batches of high-capacity output substrates, as well as wired or near-line Kodak NexPress glazing units. This equipment is suitable for high-end commercial printing.
HP Indigo 7000 Sheetfed Digital Press
The HP Indigo 7000 digital press is the first digital press to use charging roller charging technology. The device is printed in 7 colors, the format is 330mm × 482mm, the highest imaging accuracy is 230lpi, with offset printing and photo printing quality. In industrial labeling and packaging applications, the printing speed can reach 30 meters / minute; in the commercial printing field, the printing speed is up to 120 pages (A4 full color) / minute, and the monthly output is up to 3.5 million pages. Compared to offset printing, the device can reduce the overall cost of customers with more than 1 million pages per month, significantly increasing profit margins. The device was launched globally in June 2008.
HP Indigo W7200 web digital press
The HP Indigo W7200 is a new web-based liquid electrophotographic (LEP) twin-engine solution Manroland with a width of 340mm, an imaging area of 317mm x 980mm and a resolution of 230lpi, up to offset printing quality and speeds up to 240 Page (A4 full color) / minute. The monthly printing capacity of the equipment can reach 7 million A4 color pages, all printed exhibitions, or 3 million A4 black and white pages. It is suitable for all kinds of printing fields such as on-demand and short-run books, high-volume color direct mail, commercial promotional advertisements. The device will be available worldwide in the fourth quarter of 2009.
Oce Color Stream 10000 full color double-sided web printing system
Oce Color Stream 10000 full-color double-sided web printing system with LED and OceanDigiDot dot modulation technology, resolution up to 600dpi × 600dpi, and dual print heads, 168 pages in 340mm width design (A4 full Color) / minute and 800 pages (A4 black and white) / minute printing speed, monthly printing volume can exceed 60 million, suitable for the on-demand printing market.
Canon imagePRESS C6000 sheetfed digital printing machine
Canon's two new imagePRESS high-capacity digital presses, C6000 and C6000VP, are upgraded versions of imagePRESSC67000VP with resolutions up to 1200dpi x 1200dpi, speeds of 60 to 70 pages (A4) per minute, and configurable online wireless adhesives. Booking system.