Plastic closure

Details Plastic closure Plastic closure

1995-06-09

1998-11-24

Cronin, Stephen K.

Bottles and jars

Closures

Including visual indicia

215276, 215347, 215349, B65D 5304

Patent

active

058395920

ABSTRACT:
A closure is formed from a laminate or composite. The laminate is sufficiently flexible to permit it to assume the surface configuration of the rim of a closure without the need for a gasket. The laminate may include an upper layer which is rigid and a lower layer which is softer and has a lower softening temperature than the upper layer. An optional intermediate oxygen-impermeable layer such as ethylene vinyl alcohol can be included between the upper and lower layers. Preferably, the upper layer is a rigid material such as polyethylene terephthalate or polyvinyl chloride and the lower layer is a soft material such as linear low-density polyethylene. The upper layer provides the necessary strength, while the lower layer provides a tight seal on the rim of the container. The intermediate or bottom layer can also include an oxygen indicator which changes color upon exposure to oxygen.

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