Alexander H. Kerr founded the Hermetic Fruit Jar Company in 1903 and among the first commercial; products were the Economy and Self Sealing jars.
later (1915) invented a smaller, flat metal disk with the same permanent composition gasket.
The lid sealed on the top of a mason jar; a threaded metal ring held the lid down during the hot water processing.
This allowed re-use of old canning jars together with inexpensive and easy to use disposable lids.
The jar we know today was born!
This two-part lid system transformed home canning safety and is still in use today.
also made the first wide-mouth jars, which Ball was quick to duplicate.
They also make Kerr
, Bernardin and Golden Harvest canning jars.
home canning product and more information on Ball jars, can be found on their website at homecanning.com .