(under subclass 559) Dispensers in which a movable element is held in place by flanges and/or plates located on opposite faces of the movable element. The flanges may be formed by upsetting or otherwise grooving the stationary part.
(1) Note. Closures or flow controllers having their side edges bent down and then in toward the axis of reciprocation, the reentrant portion of the flanges engaging under guiding or holding flanges, entering guiding and holding grooves, are in subclasses 559 or 560.
