Method of testing a sterilization process and sterilization apparatus

• US 9,068,959 B2
• Filed: 09/09/2010
• Issued: 06/30/2015
• Est. Priority Date: 09/11/2009
• Status: Expired due to Fees

• Current Assignee: Krones AG (Krones)
• Original Assignee: Krones AG (Krones)
• Inventors: Stammel, Volker, Sobiech, Bernd, Engelhard, Patrick
• Primary Examiner(s): Yoo, Regina M
• Application Number:
  US12/878,997
• Publication Number:
  US 20110064610A1
• Time in Patent Office: 1,755 Days
• Field of Search: 422/3, 422/28, 422/30, 422/40, 422/1
• US Class Current: 1/1
• CPC Class Codes: G01N 31/226 for investigating the degree of sterilisation

Abstract

A method of testing a sterilization process for a packaging member such as, for example, for containers or machines, may include the steps of acting upon at least one first region of the packaging member or of the machine with an oxidizable medium. The method further includes acting upon at least one second region of the packaging member or of the machine with an oxidizing agent. The first region and the second region overlap at least in part. The method may also include visually inspecting at least one intersection region, which has been acted upon both with the oxidizable medium and with the oxidizing agent.

Claims

1. A method of testing a sterilization process for a packaging member, the method comprising:

directing an oxidizable medium to a surface of said packaging member;

allowing a film of the oxidizable medium to form on said surface;

directing an oxidizing agent to at least a portion of said surface with said film, contact of the oxidizing agent with the film of the oxidizable medium causing a change in the film; and

visually inspecting a selected region of said surface of said packaging member to determine if said selected portion has been acted upon with the oxidizing agent, wherein said at least one packaging member is filled with the oxidizable medium.

2. The method according to claim 1, wherein the at least one packaging member comprises a container or a region of a packaging machine.

3. The method according to claim 1, wherein said allowing the film to form comprises waiting a period of time between said directing of the oxidizable medium and said directing of the oxidizing agent such that the oxidizable medium precipates on said surface of said packing member.

4. The method according to claim 1, wherein the film has a color, and said change in the film is decolouration.

5. A method of testing a sterilization process for at least one packaging member, the method comprising the steps of:

acting upon at least one first region of said at least one packaging member with an oxidizable medium;

allowing a film of the oxidizable medium to form on said at least one first region;

acting upon at least one second region of said at least one packaging member with an oxidizing agent, said at least one first region and said at least one second region overlapping at least in part, contact of the oxidizing agent with the oxidizable medium causing a change in the film; and

visually inspecting a selected portion of said at least one first region of said at least one packaging member to determine if said selected portion has been acted upon with the oxidizing agent, wherein the at least one packaging member is a container, and the at least one first and second regions are regions of a wall of the container and wherein the at least one packaging member is filled with the oxidizable medium.

6. The method according to claim 5, wherein between the action of the oxidizable medium upon said at least one packaging member and the action of the oxidizing agent upon said at least one packaging member there is a pre-set period of time in which the oxidizable medium acts upon the at least one packaging member.

7. The method according to claim 6, wherein the pre-set period of time is longer than 10 minutes.

8. The method according to claim 7, wherein the pre-set period of time is longer than 1 hour.

9. The method according to claim 8, wherein the pre-set period of time is longer than a day.

10. The method according to claim 5, wherein the oxidizable medium is selected from a group of media which includes potassium permanganate (KMnO4), fuchsine, and combinations thereof.

11. The method according to claim 5, wherein said at least one packaging member is acted upon with the oxidizing agent in a manner adapted to the working operation of a plant for the sterilization of containers.

12. The method according to claim 5, wherein the oxidizable medium is removed from said at least one packaging member.

13. The method according to claim 5, wherein the film has a color, and said change in the film is decolouration.

14. The method, according to one of claims 5, 6-11, or 13, of testing the sterilization process for at least one packaging member, the method comprising:

acting upon the at least one first region of the at least one packaging member with the oxidizable medium;

acting upon the at least one second region of the at least one packaging member with the oxidizing agent, wherein the at least one first region and the at least one second region overlap at least in part; and

visually inspecting at least one intersection region, which has been acted upon both with the oxidizable medium and with the oxidizing agent,

wherein between the action of the oxidizable medium upon the at least one packaging member and the action of the oxidizing agent upon the at least one packaging member there is a pre-set period of time in which the oxidizable medium acts upon the at least one packaging member, wherein the pre-set period of time is longer than 10 minutes.

15. The method according to claim 14, wherein the pre-set period of time is longer than 1 hour.

16. The method according to claim 15, wherein the pre-set period of time is longer than a day.