Tamper evident closure

Details Tamper evident closure Tamper evident closure

1991-02-25

1992-02-18

Marcus, Stephen

Bottles and jars

Closures

Frangible member or portion

215252, 215256, 222521, 222541, B65D 4710, B65D 4132

Patent

active

050886134

ABSTRACT:
A tamper evident closure integrally molded in a straight draw mold without slides or cams has a cap skirt, a tamper band radially spaced from the free end of the skirt and extending radially outward, and an anchoring member, spaced radially outward of the tamper band. The tamper band is connected to both the cap skirt and the anchoring member by tearable connections in the form of scored membranes, or preferably, discrete circumferentially spaced radially extending frangible bridges. The tamper band has a circumferentially extending gap and an integral pull tab extending radially outward from one end through a gap in the anchoring member. Preferably, the scored membranes or the frangible bridges between the tamper band and the cap skirt adjacent one end of the tamper band and between the tamper band and the anchoring member at the other end are greater in cross-section than the remainder of the tearable connections so that any attempt to unscrew the closure without tearing out the tamper band results in irreversible distortion and even fracture of the tamper band.

REFERENCES:
patent: 3180532 (1965-04-01), Michel
patent: 3407967 (1968-10-01), Stull
patent: 3591031 (1971-07-01), Komendowski
patent: 3635724 (1972-01-01), Schaar
patent: 3967745 (1976-07-01), Julian
patent: 4546893 (1985-10-01), Stull
patent: 4570825 (1986-02-01), Stull
patent: 4709823 (1987-12-01), Beck et al.
patent: 4760941 (1988-08-01), Salmon et al.
patent: 4773551 (1988-09-01), Rizzardi
patent: 4821897 (1989-04-01), Weiler

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