Cap and neck structure for a wide mouth jar

Details Cap and neck structure for a wide mouth jar Cap and neck structure for a wide mouth jar

1985-01-09

1986-12-02

Norton, Donald F.

Bottles and jars

Closures

Frangible member or portion

B65D 4148

Patent

active

046258760

ABSTRACT:
A cap for a wide-mouth container has a short inner skirt and a longer outer skirt. The outer skirt has upper and lower internal locking beads which are preferably interrupted with gaps between bead sections. Above the lower locking bead is a circumferential score line. A portion of the outer skirt below the score line is cut away to form a pull tab extending parallel to the score line. The cap has a peripheral flange the underside of which slants downward-inward. The container neck is thin walled, having an internal top flange terminating in a first sealing surface which bears against the top of the inner skirt, a groove below the last-mentioned surface and a second sealing surface below the groove which also bears against the inner skirt. The neck also has upper and lower external beads each having shoulders on their lower edges under which the upper and lower internal locking beads of the cap seat. The neck curves outward in a lower shoulder immediately below the bottom edge of the skirt. The cap cannot be pried off with the fingers until the user grips the tab and tears off the portion of the outer skirt below the score line.

REFERENCES:
patent: 1793636 (1931-02-01), Robinson
patent: 3885695 (1975-05-01), Schaefer
patent: 4037746 (1977-07-01), Ver Hage
patent: 4127209 (1978-11-01), Ritzenhoff
patent: 4166552 (1979-09-01), Faulstich
patent: 4281774 (1981-08-01), Mumford
patent: 4438857 (1984-03-01), Bullock

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