Ring-shaped cutting device enveloping cutting shaft, assembled of at least two curved elements with complementary joint areas

摘要

One or more of the devices (10) are positioned along a rotating shaft working in combination with a pressure shaft. Each of the devices (10) is assembled of at least two curved elements (11) joined to each other at their outer ends by engaging a particularly shaped extension located at one end with a matching recess positioned at the adjacent end. The joint areas (12) can be zigzag-shaped, curved, or stepped, resulting in a balanced rotation of the shaft.