ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,447,726, issued on Oct. 21, was assigned to TOYOBO Co. LTD. (Osaka, Japan).
"Cavity-containing polyester film" was invented by Mei Matsumura (Tsuruga, Japan), Shotaro Nishio (Tsuruga, Japan) and Akira Shimizu (Tsuruga, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "[Problem] To provide a cavity-containing polyester film which exhibits excellent concealability, degree of whiteness and printability, and which is still free from the occurrence of a wrinkle, distortion and the like in cases where, for example, the cavity-containing polyester film is used for a roll label, and a label is delivered therefrom or wound around a product.[Solution] A cavity...