| 摘要 |
<p>Duplex printing apparatus for printing on two sides of a sheet, the apparatus comprising: an impression roller on which the sheet is held during printing; an imager which prints an image on a first side of the sheet while it is being held on the impression roller; and a sheet inverter which removes the sheet from the impression roller, inverts the sheet and returns it to the impression roller for printing on a second side of the sheet by the imager, wherein the sheet is held on said impression roller referenced to a first edge thereof during the printing of the first side thereof and is also held on the impression roller referenced to said first edge during printing of the second side thereof.</p> |
