US Patent Issued to SHANGHAI ZHOUTAI LIGHT INDUSTRY MACHINERY MANUFACTURING on Sept. 16 for "Four side seal packaging bag and preparation device and method thereof" (Chinese Inventor)

ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,415,328, issued on Sept. 16, was assigned to SHANGHAI ZHOUTAI LIGHT INDUSTRY MACHINERY MANUFACTURING Co. LTD. (Shanghai).

"Four side seal packaging bag and preparation device and method thereof" was invented by Jian Wang (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The provided are a four side seal packaging bag and a preparation device and method thereof. The preparation device includes at least: a film material conveying mechanism, configured to continuously convey a film material of a packaging bag along a length direction of the film material; a folding mechanism, configured to fold the film material conveyed by the film material convey...