ALEXANDRIA, Va., June 4 -- United States Patent no. 12,318,829, issued on June 3.
"Air conduit spirally wound and provided with a plurality of holes, related manufacturing machine and method and related strip" was invented by Gino Guasti (Florence, Italy).
According to the abstract* released by the U.S. Patent & Trademark Office: "Apparatus (10) for forming a spirally wound conduit (14) from a flat strip (2) comprising: a forming device (6) comprising a bending section (7) configured to spiralling bend the strip (2) and a joining section (8) configured to join opposite longitudinal sides (2A,2B) of the strip (2) each other; a feeding device (11) of the strip (2) along a feeding direction (F) parallel to the longitudinal edges (9) of the s...