Closure with oxygen scavenging system
AssigneeEthyl Corporation
InventorRoderick V. King
Life of this patent
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Abstract
An oxygen-scavenging system for use in a closure for containers is disclosed. The system is in the form of a closure liner that incorporates a catalyst disposed between an oxygen permeable barrier and a water absorbent backing member. The backing member rests against the inside of the closure and the oxygen permeable barrier rests against the mouth of the container and the catalyst is sandwiched between the backing member and the barrier. The backing member may be porous and the closure may be perforated to allow water to escape.
Claims23
In combination a closure and a liner comprising,
- a cup-like closure body having a closed end and a rim means on said closure body for removably attaching said closure to a container,
- a liner in said cup-like closure body,
- said liner comprising an oxygen permeable barrier layer adapted to rest on the open end of said container and a backing layer adapted to rest against the closed end of said closure and a layer of catalytic material disposed between said barrier and said backing and adapted to convert oxygen permeating said barrier layer to water.
A liner for a closure comprising,
- a cylindrical disc-like member adapted to be received in a container closure,
- said liner comprising an oxygen permeable barrier layer adapted to rest on the open end of said container and a backing layer adapted to rest against the closed end of said closure and a layer of catalytic material disposed between said barrier and said backing and adapted to convert oxygen permeating said barrier layer to water.
A container closure comprising,
- a gas impermeable generally cylindrical body closed at one end and a thread means on said closure for attaching it to a container,
- an oxygen scavenging system in said closure,
- said oxygen scavenging system comprising an oxygen permeable barrier, a backing member and a layer of catalytic material between said oxygen permeable barrier and said backing member,
- said scavenging system being in the form of a round disc attached on the inside of said closure.
Dependencies are inferred from the claim text.