ALEXANDRIA, Va., May 26 -- United States Patent no. 12,636,824, issued on May 26.
"3D drawing arrangement" was invented by Honghui Wei (Yuyao City, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A 3D drawing arrangement includes a sleeve, a gripping handle, a feeding passage, a heater, a filament moving system, and a controller which includes a control circuit and a finger detector electrically connected to the control circuit, wherein when the finger detector detects a presence of a finger of a user which is aligned with the finger detector, the control circuit starts operation of the filament moving system to feed a filament to the heater along the feeding passage, so that the filament is heated and ...