ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,910, issued on April 21, was assigned to Dynamic Design Co. Ltd. (Gwangju, South Korea).
"Vent plug for vulcanization" was invented by Jung Won Chun (Gwangju, South Korea) and Ki-Seob Lee (Gwangju, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vent plug in which air is discharged in a vent formed in a mold as an air discharge port during a vulcanization molding stage for a tire, and rubber for manufacturing a green tire is prevented from inflowing into the vent. The vent plug includes a housing inserted into the vent hole; an actuator installed inside the housing; and an opening/closing drive spring installed inside the housing to pr...