A device and method for producing sanitary articles of the pre-closed pant type (10) comprising the steps of: folding longitudinally in two a composite web (100), formed by a chain of blanks of absorbent sanitary products (10), which advance in a longitudinal direction (A), so as to form a continuous longitudinal portion of web and a discontinuous portion of web, the continuous portion comprising the waist regions, the discontinuous portion being basically constituted by the absorbent insert welding (40) the continuous portion (38) of the web (100) with welding lines (13) transverse to the longitudinal direction of advance (A) so as to form the circumference of the waist and the openings for the legs (11) of the sanitary article (10) conveying (50) the composite web (100) through the welding station (40), maintaining a positive grip of the discontinuous portions (39) of said composite web (100) feeding the cutting station (60) with said composite web (100), maintaining the positive grip of the discontinuous portions (39) of said composite web (100) and cutting said composite web (100) to separate the individual sanitary articles (10) from one another.
