HP Pro 4300 C9H70UT C9H70UT#ABA manual Media skew prevention, Correcting skewed media pages

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.

Registration assembly shutter

Leading edge contacts the 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