HP 4300 Service Manual - Page 105
Media skew prevention
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Media skew prevention The printer uses a registration shutter on the registration assembly to prevent media from entering the printer skewed (without decreasing the throughput speed). When media is fed to the registration assembly its leading edge contacts the registration shutter, but does not yet open the shutter. The feed roller continues to rotate and the media begins to sag. The sagging papers leading edge comes in full contact with the shutter (skew is corrected at this point) and raises the registration shutter. With the shutter out of the way, the media can continue into the printer paper path. Leading edge contacts the shutter Registration assembly shutter Media sags and the entire leading edge contacts the shutter Skew is corrected and the shutter raises up. The media can continue along the paper path. Figure 20. Correcting skewed media pages Q2431-90912 Chapter 5 Theory of operation 85
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