ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,699, issued on April 29, was assigned to YUNGU (GU'AN) TECHNOLOGY Co. LTD. (Langfang, China).
"Screen tensioning apparatus for mask" was invented by Yingxu Qi (Langfang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A screen tensioning apparatus for a mask is provided. The screen tensioning apparatus includes a supporting device, a first movable mechanism and an ultrasonic soldering device. The supporting device is disposed to support a mask framework. The ultrasonic soldering device includes an ultrasonic soldering head. The ultrasonic soldering head is fixedly connected to the first movable mechanism. The mask framework is disposed on the su...