Fuji Xerox on-demand printers enable printing expression of the highest quality over a vast range of colors. The development of an industry-first six-color print engine and new color management technology allow our on-demand printers to produce rich, vibrant documents using specialty spot-colors including gold, silver, and other metallic colors. Delivered with speed and stability, this industry-leading printing performance is achieved through a combination of unique Fuji Xerox technologies which we introduce to you below.
To stabilize the transport of each sheet of paper and ensure accurate paper transport, both paper displacement and skew are corrected by using a side guide attached to the paper transport unit, a line sensor to detect the position of sheets, and a movable registration roller. As a result, the print position is controlled with high precision to realize high image quality.
The seamless belt was introduced to prevent nonuniform image quality caused at the seams of a belt. As the restriction on image forming positions on the belt is thus removed, images can be placed at random. As a result, the maximum number of images can be placed on the belt to achieve high productivity. And since the belt is made longer, belt degradation caused by long-term use can be reduced, thus affording more stable color reproducibility.
Seamless intermediate transfer belt with large diameter
In addition to the transfer roll used in the conventional transfer unit configuration, this technology uses a strip roll and a transfer belt. Both components avoid paper winding and jams, and thus enable paper to be transported correctly and quickly. Conventional paper transport at high speed posed such issues as lightweight paper winding around the transfer roll or unstable paper transport. As the transfer belt serves a role in determining the paper position and guiding the transport direction, this technology realizes stable and high-speed paper transport.
Conventional transfer roll method (image)
Transfer belt paper transport technology (image)
The air assist system is equipped with fans inside the feeding tray as well as shutters that control the airflow from the fans to efficiently lift and feed each sheet of paper waiting to be fed. This system prevents multi-feed issues (in which multiple sheets of paper are fed together simultaneously) even when feeding coated paper, which has a high tendency to cling together. Also, because warm air is used, it is possible to achieve stable paper feeding even under high-temperature, high-humidity conditions.
Air assist system
The paper cooling system is equipped with a large heat sink, along with upper and lower low-heat-capacity belts. Sheets of paper heated by high-temperature fusing are cooled when passing through the belts, as the heat of paper conducts through the belts to the heat sink. This cooling mechanism prevents the curling and waving of paper that interfere with stable paper transport. In addition, the finishing process is also trouble-free because the sheets of paper do not cling together in the stacker tray after printing.
Paper cooling system configuration
An inline sensor consisting of an imaging unit, lighting unit, image processing unit, and sensor proofing unit is located near the paper exit. The sensor scans the image in the print output currently being transported, to extract the RGB values and density of the image, and the position of the line image, and then sends this information to the device's adjustment functionality. The inline sensor mechanism is also strong and has an air flow to enable it to withstand printer vibrations and high-temperature, high-humidity environments. When installed, the inline sensor can automate tone correction, nonuniformity correction, front-to-back registration adjustment, and color calibration of an image. The result is stable print quality with a minimal amount of human intervention for printer image adjustments.
Inline sensor configuration
By placing twin decurlers after the cooling unit, which cools the paper after images have been fused onto it, it is possible to eliminate the deformation of the paper caused by the heat and pressure from the fusing unit. This system ensures stable paper transport by mechanically correcting the curl in a sheet of paper (both upward and downward curls), which can hinder stable transport, before the paper is fed to the duplex paper path or output tray.
This system is able to perform automatic curl correction according to different printing conditions, such as the job's toner area coverage, the weight of the paper, or whether the job is simplex or duplex, thus achieving stable paper transport. Furthermore, the amount of pressure applied to correct the paper curl can be manually adjusted for each side of the paper independently, allowing for high paper versatility.
Twin Decurlers (image)