Container sealing member with oxygen absorbent

• US 4,287,995 A
• Filed: 11/26/1979
• Issued: 09/08/1981
• Est. Priority Date: 11/30/1978
• Status: Expired due to Term

• Current Assignee: Mitsubishi Gas Chemical Company Incorporated (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Gas Chemical Company Incorporated (Mitsubishi Electric Corporation)
• Inventors: Moriya, Takehiko
• Primary Examiner(s): Norton, Donald F.
• Application Number:
  US06/097,425
• Time in Patent Office: 652 Days
• Field of Search: 215/228, 215/231, 206/205, 426/124, 426/118
• US Class Current: 215/228
• CPC Class Codes: B65D 47/242 moving helically
• CPC Class Codes: B65D 51/244 provided with oxygen absorbers
• CPC Class Codes: B65D 81/266 for absorbing gases, e.g. oxygen absorbers or desiccants B65D51/244, B65D51/30 take precedence

Abstract

A container sealing member for a container used for preserving an aqueous liquid or semi-liquid material is disclosed. Said sealing member is characterized in that some of the space inside the sealing member is filled with an oxygen absorbent and the absorbent is separated from the contents of the container by a film which adheres to the sealing member so as to prevent the oxygen absorbent from contacting the contents of the container, the film having a plurality of fine openings and being gas-permeable but water-impermeable at one atmospheric pressure.

Claims

1. A container sealing member for a container used for preserving an aqueous liquid or semi-liquid material, characterized in that the sealing member is provided with an oxygen absorbent and retainer means to hold said oxygen absorbent, and the absorbent is covered by a film which adheres to the sealing member so that when the sealing member is in use on a container the oxygen absorbent is prevented from contacting of the contents of the container, the film having a plurality of fine openings, and being gas-permeable, but water-impermeable at one atmospheric pressure and wherein the film has a plurality of fine openings in the range of from 0.01 to 45 microns.

2. The container sealing member as defined in claim 1 wherein the film has a plurality of elongated openings each having a distance of less than 2 microns across the short axis.

3. The container sealing member as defined in claim 1 wherein said retainer means comprises said film which adheres to the sealing member.

4. The container sealing member as defined in claim 1 wherein said retainer means comprises an open cavity in the sealing member, and the oxygen absorbent is retained in the cavity, and the opening of the cavity is shut by the film.

5. The container sealing member as defined in claim 1 wherein the oxygen absorbent contains an iron powder as a reducing agent.

6. A closed container comprising a container and the container sealing member as defined in claim 1 wherein the sealing member is used in said container for preserving an aqueous liquid or semi-liquid foodstuff.