A container lid (12) is held open by a support plate (18) carrying a chamber (20) which expands at a predetermined point in a sterilizing cycle to react against the lid, moving the plate outwardly to permit the lid to drop onto the container base. A resilient gasket (16) prevents fluid flow into the...http://www.google.com/patents/US4584182?utm_source=gb-gplus-sharePatent US4584182 - Sterilized storage container
