Canning jar lid and sealing system

Details Canning jar lid and sealing system Canning jar lid and sealing system

1975-10-02

1976-11-16

Norton, Donald F.

Bottles and jars

Closures

Including visual indicia

215262, 215290, 215364, B65D 4504

Patent

active

039918971

ABSTRACT:
A canning jar sealing system has a reusable flat transparent glass lid with bosses of unequal diameter raised from its opposite sides. A peripheral flange portion of the lid is supported on the upper edge of a jar rim so that one boss extends into the mouth of the jar. A thin, flat, reusable, elastomeric sealing ring snugly encircles such boss and extends between the lid flange and the jar rim to form an airtight seal when a partial vacuum is created within the jar during the canning process. Each boss has one or more broad indentations along its peripheral edge which become filled by the sealing ring to indicate that the jar is sealed when the partial vacuum develops. A removable spring clip grips a bead or threads on the outside of the jar rim and exerts a downward force against the center of the lid to secure it to the rim of the jar until a seal is created by the partial vacuum.

REFERENCES:
patent: 36131 (1862-08-01), Zettle
patent: 602791 (1898-04-01), Wurzburg
patent: 726321 (1903-04-01), Mason
patent: 731792 (1903-06-01), Kunkel
patent: 1002963 (1911-09-01), Bostwick
patent: 1331336 (1920-02-01), Fisher
patent: 1430169 (1922-09-01), Keeran
patent: 2142590 (1939-01-01), Smith

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