EVACUATION PORT AND CLOSURE FOR DEWARS

摘要

An improved dewar design that accelerates the manufacturing process of a dewar. In a preferred embodiment, the dewar includes an evacution port that may be larger in size by a factor of ten over the size of evacuation ports of conventional dewars. The oversized evacuation port, however, does not result in an increase in the overall size or profile of the dewar. The dewar is evacuated and hermetically sealed using an re-usable evacuation tool.