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2. Weck jar - Wikipedia

   en.wikipedia.org/wiki/Weck_jar

   During the canning process the lids are secured by the clips which can be removed once the processing is complete and the jars have cooled since the lid is being forced shut by atmospheric pressure. A correctly sealed jar is indicated when the tab of the rubber seal points downward.

3. Fowler's Vacola - Wikipedia

   en.wikipedia.org/wiki/Fowler's_Vacola

   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 and ...

4. Mason jar - Wikipedia

   en.wikipedia.org/wiki/Mason_jar

   Among the earliest glass jars used for home canning were wax sealers, named in reference to the sealing wax that was poured into a channel around the lip to secure a tin lid. This process, though complicated and error-prone, became popular in the late 1830s or early 1840s and was still used to seal fruit jars until about 1890.

5. 6 Canning Secrets Your Grandma May Have Forgotten To Tell You

   www.aol.com/6-canning-secrets-grandma-may...

   Most canning recipes call for using a boiling water method or a pressure canner, depending on the acidity of the food being canned. ... but it’s actually quite important—even if the jars and ...

6. Home canning - Wikipedia

   en.wikipedia.org/wiki/Home_canning

   This system uses glass jars, single use seals, metal lids, and a water bath canning sterilization process. During the canning process the lids are secured by metal tension clips which are removed once a vacuum seal has formed. [20] Fowler's Vacola products are still produced and are available from some hardware stores.

7. John Landis Mason - Wikipedia

   en.wikipedia.org/wiki/John_Landis_Mason

   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.