Apparatus for producing sanitary absorbent articles comprising a perforating device of a web and process

An apparatus for producing sanitary absorbent articles, comprising:

• at least one perforating device of at least one web intended for making said sanitary absorbent articles,
• wherein said perforating device comprises a first roller and a second roller respectively provided with a first mantle and a second mantle and between which, in use, passes said web,
• wherein said first roller and said second roller are configured to rotate in opposite directions respectively around a first axis of rotation at a first velocity and around a second axis of rotation, parallel to said first axis of rotation, at a second velocity different from said first velocity,
• wherein said first mantle comprises a first protruding pattern including a plurality of first protrusions having outermost first end surfaces, and said second mantle comprises at least a first zone,
• wherein a second protruding pattern is present including a plurality of second protrusions having outermost second end surfaces, and at least a second zone without protruding patterns and adjacent to said first zone along a circumference of said second mantle,
• wherein said second end surfaces of said of second protruding pattern are configured, in use, to temporally engage said web by engagement with the first end surfaces of said first protruding pattern without interpenetrating the latter for locally perforating said web.