associated with toggle levers, e.g. swing stopper arrangements

Full Title

Clamping or other pressure-applying devices for securing or retaining closure members (expansible stoppers B65D39/12) > for applying axial pressure to engage closure with sealing surface > comprising U-shaped or bifurcated members coacting with containers , e.g. pivoted bails > associated with toggle levers, e.g. swing stopper arrangements