Kerr self sealing mason jar dating, kerr self sealing
Also a large metal rim.
Seams along the entire sidefrom bottom to top, mean the jar was made by a machine, probably after Very good condition - no chips or cracks. More Types of Seals There were hundreds of types of seals patented during this time. Comes with lid shown.
Does Ball still make rubber seals for the older zinc caps? Then learn to can and freeze!
See the Hoosier Jar Color Page. Some square,round and with ribs.
History of the Home Canning Jar and Collecting Antique Mason, Ball and Kerr Jars
The difficulty came when it was time to open the jar because the wax had to be melted so that the lid could be taken off. Consumers complained that it was difficult to remove the stopper from the jar.
Look for the Kerr name, which is embossed onto the surface. A vacuum was created as the jar cooled and pulled the stopper into place and held it there. This allowed re-use of old canning jars together with inexpensive and easy to use disposable lids.
They also incorporated aspects from two patents held by self sealing mason jar dating inventor, Julius Landsberger: Kerr later invented a smaller, flat metal disk with the same permanent composition gasket. Thumbscrew Clamp During the Civil War and later some manufacturers used a clamp and glass lid design.
A jar in pristine confition that still has its original lid will be worth much more. The mold information is embossed on the base.
Kerr, chip on the mouth edge. Hazel-Atlas Glass Company were in business from the late s until Closures - The common ring and lid used today wasn't always the standard. Muncie where a supply of natural gas had been discovered was chosen because the city was offering free gas and land to rebuild the factory.
There is some minor surface rust on the metal which is very common with metal.
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