Safety aspects on service-friendly paper machines

Continuously increasing production speeds together with higher quality demands on the paper require more and more an evaluation of production and clothing to be carried out in exposed positions within the machine during the manufacturing process. This evaluation relates particularly to the CD and also the MD profiles. Only in this way can a reliable product be obtained. In fact there are possibilities within the paper machine for correcting, relatively quickly, problems such as poor CD profile: eg. by adjustments to the headbox, the press nip, the steembox or by, the application of mist showers-to name but a few. However, these possibilities bring with them the risk that only the symptoms are dealt with rather than the basic problem being solved. An essential prerequisite for determining the problem and eliminating its causes is the possibility of carrying out measurements after (in the machine running direction) each of the installations which can influence the CD or MD profile. This requirement-particularly with reference to the safety aspect-make it necessary to be able to carry out CD profile measurements without manual intervention. In existing paper machines this is entirely possible following installation of a number of aids. However, where manual measurements are unavoidable, additional safety features for the protection of the `measuring man' should be made available.