- The paper fed from each paper bank tray is first transported to the vertical feed unit (VTU) and then to the paper registration unit.
- After each sheet is tested for double-feeding, each sheet is corrected for skew, positioned correctly for paper registration in both main scan and sub scan directions, and then is sent to the PTR unit where the image is transferred from drum to paper.
- The two paper feed sources are the three paper trays of the main unit paper bank, or an optional large capacity tray (LCT) unit installed on the right side of the machine.
- During duplex printing, once the paper leaves the fusing unit (after the first side is printed) the paper is sent down into the inverter path and then reverse fed back across the machine to the junction of the VTU and then sent once more through the paper registration unit above.
No. | Name | Content |
|---|---|---|
1 | Main Relay Sensor | Monitors movement of paper to check for paper jams. |
2 | Registration Entrance Sensor | Monitors movement of paper to check for paper jams. |
3 | LCT Relay Sensor | Monitors movement of paper to check for paper jams. |
4 | Double-feed Sensor (Emitter) | Mounted below the double-feed sensor (receptor), the paper passes through the gap between these two sensors for the double-feed check. |
5 | Double-feed Sensor (Receptor) | Mounted above the double-feed sensor (emitter), the paper passes through the gap between these two sensors for the double-feed check. |
6 | Registration Timing Sensor | Determines the timing of the rotation of the registration gate roller to stop paper in the paper path, also checks for paper jams. |
7 | CIS | Checks paper position in the path to determine the amount of correction needed. |
8 | Transfer Timing Sensor | Monitors paper movement for jam detection and controls the timing of paper release to the PTR unit. |