MACHINE FOR THE PRODUCTION OF TUBES BY WINDING STRIPS OF WEBLIKE MATERIAL

摘要

The machine for producing tubes comprises: a winding spindle (4), around which strips of weblike material are wound to form the tube (T), which is made to advance along the spindle; a device for supply and winding of said strips around said spindle; and at least one knife (51) for cutting lengths of said tube being formed. The knife is provided with a reciprocating movement parallel to said spindle. There is moreover envisaged a counter-knife (57) within the tube being formed, provided with a movement of translation synchronized to the movement of translation of said knife. The counter-knife is magnetically constrained to a mover member (67, 71), which transmits the motion of translation to the counter-knife.