ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,138, issued on Oct. 14, was assigned to CORELEX SHIN-EI Co. LTD. (Fuji, Japan).
"Toilet paper roll manufacturing method" was invented by Satoshi Kurosaki (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A toilet paper roll manufacturing method is provided with which, when 4-ply toilet paper is torn off, individual layered sheets of the paper are prevented from peeling off each other and a good appearance is ensured. The method includes a step of forming laminated paper 101 by bonding base paper 10a and base paper 11a, a step of forming laminated paper 102 by bonding base paper 13a and base paper 12a, and a step of spraying a bonding l...