A lid for use with containers such as drums, pails, tubs and cups which is formed as a singular unit from molded plastic and which incorporates a peripherally disposed skirt configured along with a rim structure to provide primary and secondary latching features. A parting groove is positioned within...http://www.google.fr/patents/US4718571?utm_source=gb-gplus-shareBrevet US4718571 - Molded lid assembly with primary and secondary latching features
Molded lid assembly with primary and secondary latching features
