Swimming roll

The swimming roll (Fig. 6.4) was introduced into the paper industry in 1960 by Kiisters (Germany). In principle the shell rotates around a fixed axial beam with... 

Fig. 6.4 Swimming roll, an example of a one-zone roll (source Voith).

Introduced by Beloit in 1960, the shell of this crown control (CCj roU is supported by one shoe with hydrodynamic lubrication. The shoe can move in the nip direction in the fixed axial beam which takes the line load forces and deflects. Loading is external as with the swimming roll. 

Heliobacterium fasciculum (Latin fasciculus, bundle), was isolated from Tanzanian paddy field soil. The rods are 0.8-1 X 8-20 urn, motile with thick, polar ( ) flagella, and associate in parallel motile bundles (Fig. 5), which swim with a characteristic rolling motion and are phototactic. 

I was toying with two careers medicine and oceanography. My decision was narrowed after a day spent floating offshore of the Scripps Institute of Oceanography at La Jolla. As the vessel lurched, rolled, and pitched, I was overtaken by seasickness, ready to swim ashore rather than suffer another minute afloat. Little did I know that I would be seaborne again in just a few years, first bound for the European theater, and then for my medical assignment in Japan. 

Hence, the introduction of the Swimming RoU in the 1950s by Kusters was of decisive importance for the further development of both the machine calender and the supercalender. This roll consists of a fixed shaft with a shell rotating around it. Between the shaft and the shell is an oil-filled chamber. By adjusting the oil pressure in this chamber the shape of the roll shell can be changed (Fig. 6.66). Thus the operating window of calenders was suddenly expanded. 

The beauty of tumble testing is that it is an all-encompassing test. It is a rock-and-roll, take-no-prisoners, sink-or-swim, do-or-die kind of test. It is the engineering equivalent of playing No-Limit Hold Em poker, looking at your cards, evaluating the bets on the table, and then declaring, I m all in (Tables 5.1-5.2). 

---