Knot catcher

A device for cleaning the paper pulp from dirt and undergrown cellulose bunches, in the shape of a huge cylinder resting on a cast iron base, dating from the interwar period. Small holes are made in the form of slots in the cylinder shell. The ground pulp was fed into the cylinder through a system of pipes. During the operation of the device, the cylinder was subjected to vibrations, as a result of which the ground paper mass passed through the slots. Coarser fractions remained inside the knot catcher - ungrounded cellulose lumps, which were then directed to the regrinding devices. Thanks to the use of reefs, paper mills were able to produce better quality paper, without lumps. Knot catcher was brought to the Museum when the facility was a branch of Bardeckie Zakłady Papiernicze, no documents showing its original place of use have survived. It is likely that it was operated in one of the paper mills belonging to this enterprise (Bardo, Młynów or Nowa Bystrzyca).