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Older styles of home canning jars are "Not Recommended" by the U.S.-based National Center for Home Food Preservation, the United States Department of Agriculture, and University Extension Services. These include: those using a zinc cap and a rubber jar ring, and those using a glass lid, wire bail, and rubber sealing ring.
Mason's innovation was a square-shouldered jar with threaded screw-top, matching lid, and rubber ring for an airtight seal. Mason's easy-to-use, re-usable jars made home canning popular among American settlers, homesteaders, and even in urban homes. Most Mason jars were manufactured by competitors after his patent expired in 1879.
The Fowler's Vacola system uses glass jars, single use rubber ring seals and pressed metal lids, much like American Mason jars first patented in 1858, except that the jars and lids are not threaded. During the canning process, while still hot (and presumably sterile ), the lids are secured by metal tension clips which are removed once cooled ...
In 1858, Mason created jars that were made of transparent glass with a screw-on top. Inside the flat metal lids, he placed a rubber ring, which was crucial to making the container airtight.
Atmospheric steam canning — Processing with 100 °C steam, not under pressure [14] Use of vintage style sealing materials such as jars with wire bails and glass caps, or zinc caps with rubber rings. Instead of a lid, cellophane and rubber bands (moldy). Using the water bath technique for low-acid foods (foods with pH greater than 4.6). [15]
Because the four main components of their core product line of canning jars included glass, zinc, rubber, and paper, the Ball company acquired a zinc strip rolling mill to produce metal lids for their glass jars, manufactured rubber sealing rings for the jars, and acquired a paper mill to fabricate the packaging used in shipping their products.
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