| 摘要 |
<p>A hot roll fuser comprises a heated fuser roll 31 and a pair of back-up rolls 32 and 33, to form two fusing nips. The back up rolls are arranged such that the peripheral speed of the second, in the direction of movement of paper through the nips, is greater than the first. Thus, the paper is tensioned into close contact with the heated roll between the nips. The peripheral speed difference is achieved either by making the surface of the second roller harder than the first, or by making the second roller longer in diameter than the first or by loading it into contact with the heated roller with more force than the first.</p> |
