US 12,337,565 B2
Method and system for applying a sealing agent to the surface of an internal cavity of a pneumatic tire
Roberto Pontone, Rome (IT); and Paolo Straffi, Rome (IT)
Assigned to Bridgestone Europe NV/SA, Zaventem (BE)
Filed by BRIDGESTONE EUROPE NV/SA [BE/BE], Zaventem (BE)
Filed on Aug. 7, 2024, as Appl. No. 18/797,254.
Application 18/797,254 is a division of application No. 17/914,459, granted, now 12,090,719, previously published as PCT/EP2021/058027, filed on Mar. 26, 2021.
Claims priority of application No. 102020000006637 (IT), filed on Mar. 30, 2020.
Prior Publication US 2024/0391196 A1, Nov. 28, 2024
Int. Cl. B29D 30/04 (2006.01); B29C 73/16 (2006.01); B29D 30/06 (2006.01); B29D 30/00 (2006.01)
CPC B29D 30/0685 (2013.01) [B29C 73/166 (2013.01); B29D 2030/0066 (2013.01); B29D 2030/069 (2013.01); B29D 2030/0694 (2013.01); B29D 2030/0698 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A system for applying sealing agent to a surface of an inner cavity of a pneumatic tire, the system comprising:
a sealing agent applicator device configured to apply a strip of sealing agent to the surface of the inner cavity while the pneumatic tire is brought into rotation around an axis thereof;
a weighing station configured to measure a first weight of the pneumatic tire before the application of the sealing agent to the surface, and a second weight of the pneumatic tire after the application of the sealing agent to the surface;
a control unit connected to the weighing station and further configured to:
calculate a quantity of sealing agent applied to the surface from a difference between the measured second weight and the measured first weight;
calculate 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;
store 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;
determine 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;
calculate a correction factor selectively using the short-term compensation factor or the long-term compensation factor; and
use said correction factor to actuate the applicator device during a subsequent iteration of applying the strip of sealing agent to the surface.