Fecha de publicación: 02/01/2025 Fuente: WIPO "tomato" Apparatus (2) and method for sealing of packaging material (1 ), the apparatus (2) comprising a sealing element (3) comprising at least one electrically conductive winding (5), an actuation system structured for moving said sealing element (3) and a contrast element (6) for compressing at least one electrically conductive portion (50) of said packaging material (1 ) between said sealing element (3) and said contrast element (6); an electric energy generator (7) and a control unit (8) programmed and configured for performing the following method steps: - compressing the portion (50) of the packaging material (1 ); - applying an electric voltage (V) to opposite ends of the winding (5) for creating, a passage of electric current having at least one component variable over time; - determining a time trend (i) of an intensity of electric current passing in the winding (5); - dynamically adjusting the electric voltage (V) as a function of said time trend (i) of the intensity of electric current.