| 摘要 |
A rotatable sheet brake roller, whose peripheral speed is varied in response to the speed of a printed sheet transport means, is disclosed. Initially, the sheet brake roller runs at a peripheral speed generally the same as the sheet transport speed. Once the sheet is released from its transport, the sheet brake roller decelerates to slow the sheet to a sheet delivery speed. A dampening unit is associated with the sheet brake roller which has a surface that repels printing ink. The dampening unit removes ink particles from the surface of the sheet brake roller to eliminate smearing which would otherwise occur, particularly in recto and verso printing when a freshly printed surface of the printed sheet contacts the surface of the sheet brake roller.
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