Slitter device with an approximation for upper and lower blades.

摘要

Longitudinal cutting device for material webs continuously transported, in particular for paper webs or cardboard, with a rotatable upper knife and a rotating lower blade, which are associated respectively one rotation drive (5, 6, 5a) and with an advance device which transfers the upper knife (4) and the lower blade (3) relative to one another to a cutting position, provided control means (S, St, St1 to St3 being; 9-11 ) directing the advancing device such that at the cutting position the upper blade (4) and the lower knife (3, 3a) are positioned in relationship relative to each other without contact, forming a slit axial cutting-relative the axes of rotation of the upper blade and the blade-lower wherein the upper blade (4) and the rotary drive (6) associated are mounted on a carriage arrangement (7, 8) comprises at least two carriage parts (7, 8) movable relative to one another and which can move axially through a unit approach (9) of the advancing device, the carriage part (7) carrying the blade being mounted upper (4) relative to a carriage part (8) fixable, axially displaceable along the rotation axis of the upper knife (4), and the advancing device comprising a return means (12) acting on the carriage part (7) bearing the upper knife (4) to turn axially the upper blade (4) of a support position on the lower knife, and that the arrangement of carriage (7, 8) has a means actuator (11) which fixes the carriage parts (7, 8) relative to one another or released for a relative movement.