Home canning system

Details Home canning system Home canning system

1977-03-28

1978-06-06

Hart, Ro E.

Bottles and jars

Closures

With separate applied fastener to hold closure in closed...

215350, B65D 4510

Patent

active

040930947

ABSTRACT:
An improved home canning closure system is provided for a home canning jar featuring a plastic ring and a metal lid combination which is adapted to allow excess pressure to escape while preventing the escape of the contents from the container. The plastic ring includes an annular top panel portion and a skirt portion depending downwardly from the outer periphery of the top panel portion. The skirt portion incorporates buttress threads on its inner surface to engage threads on the external neck of the home canning jar. The plastic ring features an upwardly and outwardly inclined ramp portion on its lower surface and a thin section at the junction of the top panel and skirt portions which combine to form a spring member to maintain a constant force to bias the metal lid into sealing engagement with the upper rim on the home canning jar.

REFERENCES:
patent: 1010285 (1911-11-01), Mackin
patent: 1237640 (1917-08-01), Hammer
patent: 1250058 (1917-12-01), Weaver
patent: 1615533 (1927-01-01), Brown
patent: 1999622 (1935-04-01), Argeo
patent: 2270729 (1942-01-01), Geddes
patent: 2449014 (1948-09-01), Shaffer
patent: 2498930 (1950-02-01), Wadsworth
patent: 3491908 (1970-01-01), Beimers
patent: 3586196 (1971-06-01), Barton
patent: 3836033 (1974-09-01), Podesta

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