ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,528,664, issued on Jan. 20, was assigned to Heidelberger Druckmaschinen AG (Heidelberg, Germany).
"Device and method for folding sheets" was invented by Herbert Ackermann (Ludwigsburg, Germany), Martin Haupt-Terlau (Erdmannhausen, Germany), Gerhard Lubberger (Steinheim, Germany) and Stefan Waldreiter (Erdmannhausen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A folding unit has two folding rollers with a common folding nip. A first insertion slot has a first insertion plane for a selectively insertable buckle plate and is configured so that a buckle plate mouth of the buckle plate is at an inlet side of the folding nip. A second insertion slo...