A Mason jar — named after John Landis Mason , who patented it in — is a moulded glass jar used in home canning to preserve food. The jar's mouth has a screw thread on its outer perimeter to accept a metal ring or "band". The band, when screwed down, presses a separate stamped steel disc-shaped lid against the jar's rim. An integral rubber ring on the underside of the lid creates a hermetic seal. The bands and lids usually come with new jars, but they are also sold separately. While the bands are reusable, the lids are intended for single-use when canning.
Ball jar dating chart
Ball jar dating chart – Z Tattoo
These humble glass pieces were designed for putting up fruits and vegetables in the days before refrigeration. Here are some of the most valuable finds from the s to the s, when hundreds of companies were vying for a spot on America's shelves:. This unmarked, mid- s model featured cork, which did little to preserve its contents. The unique topper makes it of note today.
The Collector's Ultimate Guide to Canning Jars
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Alexander H. Kerr apparently became involved with jars to supply the family packing former J. Kelley Glass Co.