Sealing strip for sealing a positive or negative pressure zone of a roller, roller with such a sealing strip, and method for operating the roller

A sealing device for sealing a positive or negative pressure zone of a roll or a machine for producing or processing a fibrous web, the sealing device comprising:

• a supply line for supplying a lubricant;
• a sealing strip having a sealing surface, first and second longitudinal ends, a length, and a plurality of mutually adjacent inlets distributed over said length of said sealing strip and spaced apart by distances therebetween;
• one or both of said longitudinal ends of said sealing strip each being spaced apart from a respective one of said inlets by at least 20 mm and at most 1000 mm;
• each longitudinal end being supplied by a respective one of said inlets being closer to said longitudinal end than said distances between said mutually adjacent inlets;
• and
• a lubricating device to be connected through said plurality of inlets to said supply line for introducing the lubricant between an inner surface of a roll shell of the roll and said sealing surface of said sealing strip during operation, said lubricating device having a plurality of lubricant outlet openings.