| 摘要 |
This press has three rubber rollers. Two contacting rubber rollers of same diameter have 180 DEG cut-outs receiving printing plates of any angular extent up to 180 DEG with the rubber of each one contacting the plate of the other as these two rollers roll in opposite directions by means of gearing. When the printing plate is a full 180 DEG , the rubber layer on one roller always contacts the printing plate of the other. The third roller is rubber all around and has a circumference equal to half of the circumference of each of the first two rollers. A single inking system applies ink to the first of the two rollers. Thus, the first of the two rollers accomplishes a double function as plate and inkroller, the second of the first two rollers has the function of a plate and blanket roller and the third smaller roller acts as a blanket and impression roller, so that a sheet fed between the second of the two rollers and the smaller roller, is printed on both sides simultaneously.
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