A sealing device for sealing edges of a continuous film made of paper material and folded into a tubular shape for continuous packaging of food products, said edges extending longitudinally and being folded outward, comprising: conveying means configured to convey the continuous film forward along a conveyance path;sealing means configured to seal the two folded edges together in a sealing zone of the conveyance path during the conveying of the continuous film forward along said conveyance path,wherein the sealing means are movable between a first position, in which they are away from the sealing zone, and a second position, in which they are in the sealing zone, in the second position said sealing means being operatively active on the two edges so as to compress and heat them, wherein the sealing means are arranged on opposite sides of the sealing zone, the passage from the first to the second position taking place by bringing the sealing means near to each other and to the sealing zone, wherein the sealing means comprise: - two sliding blocks that are opposite relative to the sealing zone and movable towards/away from each other between the two positions; - two heating elements, each mounted at one end of one of the sliding blocks; movement means for moving the sliding blocks between the two positions, characterized in that, said movement means are configured to: - exert a first pressure on the sliding blocks to bring them from the first to the second position, or vice-versa; - exert a second pressure, lower than the first pressure, on the sliding blocks in the second position to compress the edges. conveying means configured to convey the continuous film forward along a conveyance path;sealing means configured to seal the two folded edges together in a sealing zone of the conveyance path during the conveying of the continuous film forward along said conveyance path,wherein the sealing means are movable between a first position, in which they are away from the sealing zone, and a second position, in which they are in the sealing zone, in the second position said sealing means being operatively active on the two edges so as to compress and heat them, wherein the sealing means are arranged on opposite sides of the sealing zone, the passage from the first to the second position taking place by bringing the sealing means near to each other and to the sealing zone, wherein the sealing means comprise: - two sliding blocks that are opposite relative to the sealing zone and movable towards/away from each other between the two positions; - two heating elements, each mounted at one end of one of the sliding blocks; - two sliding blocks that are opposite relative to the sealing zone and movable towards/away from each other between the two positions; - two heating elements, each mounted at one end of one of the sliding blocks; movement means for moving the sliding blocks between the two positions, characterized in that, said movement means are configured to: - exert a first pressure on the sliding blocks to bring them from the first to the second position, or vice-versa; - exert a second pressure, lower than the first pressure, on the sliding blocks in the second position to compress the edges. - exert a first pressure on the sliding blocks to bring them from the first to the second position, or vice-versa; - exert a second pressure, lower than the first pressure, on the sliding blocks in the second position to compress the edges.