| 摘要 |
An offset printing press having a plate cylinder, a dampening unit and an inking unit. The dampening unit comprises a rotatable dampening form roller, a rotatable dampening fluid feed roller, and a rotatable auxiliary dampening roller. The rotatable dampening form roller is in removable contacting engagement with the plate cylinder along a contact stripe, and transfers dampening fluid to the plate cylinder. The rotatable dampening fluid feed roller is in removable contacting engagement with the dampening form roller and transfers dampening fluid thereto. The dampening fluid feed roller is in fluid flow communication with a dampening fluid source. The rotatable auxiliary dampening roller is in contacting engagement with the dampening form roller immediately upstream of the contact stripe.
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