Perforating apparatus for paper webs and the like, with reciprocating motion of translation of the counter-blade

摘要

A perforating apparatus is disclosed for rewinding machines and the like which includes a rotating roller (5), on which cutting blades (31) are disposed. A shaft (3) carries a perforating counter-blade (33) provided with indentations. An oscillating drive (57, 59, 61, 63, 65) is combined with the shaft (3) which causes the counter-blade 33 to move with reciprocating translation motion in a direction parallel to the axis of the rotating roller (5), so as to avoid a concentration of wear in the cutting blades (31).