Method and system for applying a sealing agent to the surface of an internal cavity of a pneumatic tire

A method for applying a sealing agent to a surface of an inner cavity of a pneumatic tire, the method comprising:

• applying a strip of sealing agent to the surface of the inner cavity via an applicator device while the pneumatic tire is brought into rotation around an axis thereof;
• measuring a first weight of the pneumatic tire before the application of the sealing agent to the surface;
• measuring a second weight of the pneumatic tire after the application of the sealing agent to the surface;
• calculating a quantity of sealing agent applied to the surface from a difference between the measured second weight and the measured first weight;
• calculating a difference between the quantity of sealing agent applied to the surface and a reference quantity of sealing agent to be applied to the surface that varies as a function of a type of pneumatic tire;
• storing said difference between the quantity of sealing agent applied to the surface and the reference quantity within a short-term memory buffer and a long-term memory buffer having a greater number of cells than the short-term memory buffer;
• determining a short-term compensation factor and a long-term compensation factor as a function of both the short-term memory buffer and the long-term memory buffer;
• calculating a correction factor selectively using the short-term compensation factor or the long-term compensation factor;
• and
• using said correction factor to actuate the applicator device during a subsequent iteration of applying the strip of sealing agent to the surface.