Sign cutting device

In a cutting device comprising a support roller (8) freely rotatable in both directions and able to absorb the pressure of cutting, a carrier (9) movable in the direction of the longitudinal axis of the support roller (8) that further comprises a cutting tool (26, 27) adapted to be pushed into contact with a portion of a roll of material to be cut that is present over the support roller (8), the improvement which comprises a means for lowering the cutting tool (26, 27) into an operating position and for raising from the operating position that comprises a rotatable eccentric element (14, 34) that is rotated against a returning force from a normal position that corresponds to a raised position of said cutting tool (26, 27), and said eccentric element is coupled with a pivotable straight arm (17) that is adapted to support the cutting tool (26, 27), wherein said means for lowering limits a raising and lowering movement of the cutting tool, and further comprises a leaf spring (21) that is fixed on the arm (17) with a free end braced against the upper end (28) of the cutting tool (26, 27), so that the vertical distance between a front tip and the upper end (28) of the cutting tool (26, 27) is greater than the minimum vertical distance between the support roller (8) and that portion of leaf spring (21), which normally rests against on the upper end (28) of the cutting tool (26, 27), when the spring is relaxed because the cutting tool (26, 27) is absent.