Accurate Image Positioning During Duplex Printing
Auto-Registration
To ensure proper post-press processes, such as paper cutting and book binding, the imagePRESS must realize high-precision image positioning on the paper. Canon uses three Auto-Registration functions for increased image-positioning accuracy.
First, Active Registration uses skew-feed rollers to push fed paper against the side reference plate to ensure proper alignment with the image printing direction.
Active Registration
Next, on the intermediate transfer belt, the Registration Patch sensor detects a patch printed at the leading edge of the transfer image. By controlling the transport timing of the paper, this function ensures accurate print positioning between the leading and trailing edges of the paper.
During duplex printing, the paper shrinks slightly due to the heat that is applied to fix the image to the front surface. To prevent paper shrinkage from affecting the printing position, Canon uses 2nd Image Size Reduction to create a slightly smaller image on the back surface so that the printed image size is identical on both the front and back surfaces of the paper. The system delivers precision performance when high imagepositioning accuracy is required in duplex printing.
Overview of 2nd Image Size Reduction
Video overview
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