Paper machines have an extra smoothing process called a calendar, which is added to the dryer screen. The calendar consists of several rollers arranged vertically one upon the other. By running the almost dryer paper web between the rollers under high pressure, the paper is compacted and smooth. The finished paper web is wound up on a steel shaft (reel). The paper now contains 5 – 8% moisture content. The paper now has all the characteristics required for its end use, but must be cut into narrower reels by a slitter / rewinder. Conversion solutions for the highest efficiency and quality, machine calenders are indispensable for satinage of many paper grades and make an important contribution in the paper machine to the production of gloss and smoothness. With the increasing demand for the satinage process and the often insufficient technical equipment of the machine calenders, there is a large potential for modernization. The objectives of these rebuilds are: increased speed and efficiency, improved quality.