Bottles and jars – Closures – Frangible member or portion
Patent
1994-04-29
1996-08-20
Weaver, Sue A.
Bottles and jars
Closures
Frangible member or portion
B65D 4134
Patent
active
055470920
ABSTRACT:
The invention provides a container closure molded from a plastics material and comprising a crown, an annular skirt depending from the crown and provided with a screw-thread on its internal surface, a tamper-evident ring connected to the free end of the annular skirt by a series of frangible bridges extending across an axial gap or circumferential line of weakening between the ring and the skirt, the ring having on its inner surface a series of integral radially inwardly projecting protrusions each having a contact surface generally facing the crown, wherein each bridge is formed with a weakened portion in the unscrewing direction, whereby during unscrewing of the closure from a container neck with a security band formation, the fracture of the bridges occurs as a result of tension and shear forces to provide a sequential separation.
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patent: 5131550 (1992-07-01), Thompson
MCG Closures Limited
Weaver Sue A.
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