subject: Raschig ring for high connection [print this page] Various constructions of raschig ring binders are known, in which a plurality of raschig ring, normally closed, can be selectively opened to add or replace pages in a sheaf of pages held together by the raschig rings. It is desirable that the raschig rings be locked in closed position, for some applications, to prevent an inadvertent opening of the raschig ring.
To that end, a variety of constructions have been proposed, generally using a pair of levers at opposite ends of the frame of the binder, by which the raschig ring can be selectively opened. When the levers, sometimes referred to as triggers, are in closed position, an interlock arrangement prevents the raschig ring from being opened inadvertently. One such construction is disclosed by U.S. Ser. No. 635,284 filed Dec. 28, 1990, assigned to assignee of present invention.
