Apparatus and method for sterilizing plastic preforms

Patent metadata

Field	Value
Publication number	US-11660803-B2
Application number	US-202117543354-A
Country	US
Kind code	B2
Filing date	Dec 6, 2021
Priority date	Dec 4, 2020
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

Apparatus for treating plastic preforms, having a heating device for heating the plastic preforms, having forming devices for forming the plastic preforms into plastic containers, and having a sterilization device for sterilizing the plastic preforms, wherein the sterilization device has at least one first sterilization unit which has a rotatable transport carrier and a plurality of holding devices arranged on this transport carrier for holding the plastic preforms, as well as a plurality of first application devices for acting upon the plastic preforms, and the sterilization device has a second sterilization unit.

First claim

The invention claimed is:

1. An apparatus for treating plastic preforms with a heating device for heating the plastic preforms, wherein the heating device has a transport device for transporting the plastic preforms and at least one heating device for heating the plastic preforms, having a forming device, arranged downstream of the heating device in a transport direction of the plastic preforms, for forming the plastic preforms into plastic containers, and having a sterilization device for sterilizing the plastic preforms,
wherein
the sterilization device has at least one first sterilization unit which has a rotatable transport carrier and a plurality of holding devices arranged on the transport carrier and configured for holding the plastic preforms, and a plurality of first application devices configured for acting upon the plastic preforms with a flowable medium, and the sterilization device has a second sterilization unit which follows the first sterilization device in the transport direction of the plastic preforms and which has a rotatable transport carrier and a plurality of second holding devices arranged on this transport carrier configured for holding the plastic preforms, and a plurality of second application devices configured for acting upon the plastic preforms with a flowable medium, wherein the plastic preforms are transferred directly from the first sterilization unit to the second sterilization unit,
wherein
the first application devices or components of the first application devices are arranged in a first position with respect to a longitudinal direction of the plastic preforms and the second application devices or components of the second application devices are arranged in a second position with respect to the longitudinal direction of the plastic preforms and the first and second positions are different.

2. The apparatus according to claim 1 ,
wherein
the plastic preforms are transferred directly from a holding device of the first sterilization unit to a holding device of the second sterilization unit.

3. The apparatus according to claim 1 ,
wherein
the sterilization device is arranged in the transport direction of the plastic preforms between the heating device and the forming device.

4. A sterilization device for sterilizing plastic preforms, wherein the sterilization device has at least one first sterilization unit which has a rotatable transport carrier and a plurality of first holding devices, arranged on the transport carrier and configured for holding the plastic preforms, and a plurality of first application devices configured for acting upon the plastic preforms with a flowable sterilization medium, and the sterilization device has a second sterilization unit which follows the first sterilization unit in the transport direction of the plastic preforms and which has a rotatable transport carrier and a plurality of second holding devices, arranged on this transport carrier and configured for holding the plastic preforms, and a plurality of second application devices configured for acting upon the plastic preforms with a flowable sterilization medium,
wherein
the plastic preforms can be transferred directly from the first sterilization unit to the second sterilization unit,
wherein
the first application devices or components of the first application devices are arranged in a first position with respect to a longitudinal direction of the plastic preforms and the second application devices or components of the second application devices are arranged in a second position with respect to the longitudinal direction of the plastic preforms and the first and second positions are different.

5. The sterilization device according to claim 4 ,
wherein
precisely one first application device is assigned to each first holding device and/or precisely one second application device is assigned to each second holding device.

6. The sterilization device according to claim 4 ,
wherein
the first application devices and/or the second application devices are arranged on a rotatable carrier.

7. The sterilization device according to claim 4 ,
wherein
the sterilization device comprises a third sterilization unit, which comprises a rotatable transport carrier and a plurality of holding devices arranged on this transport carrier for holding the plastic preforms, as well as a plurality of application devices for acting upon the plastic preforms with a flowable sterilization medium.

8. The sterilization device according to claim 4 ,
wherein
the first application devices and/or the second application devices have distributing elements configured for distributing a sterilizing agent to mouth regions of the containers, wherein the distributing elements having a larger cross section than the mouth cross sections of the containers to be sterilized.

9. The sterilization device according to claim 4 ,
wherein
the first application devices and/or the second application devices are movable with respect to the containers to be sterilized in a longitudinal direction of the containers.

10. The sterilization device according to claim 4 ,
wherein
the first holding devices are arranged in a first position with respect to a longitudinal direction of the plastic preforms and the second holding devices are arranged in a second position with respect to the longitudinal direction of the plastic preforms, and the first and second positions are different.

11. A method for sterilizing plastic preforms, wherein the plastic containers are sterilized by a first sterilization device which comprises at least a first sterilization unit which has a rotatable transport carrier and a plurality of first holding devices arranged on said transport carrier which hold the plastic preforms, and a plurality of first application devices which act upon the plastic preforms with a flowable medium, and the sterilization device has a second sterilization unit which sterilizes the plastic preforms after they have been sterilized by the first sterilization unit and which has a rotatable transport carrier and a plurality of second holding devices which are arranged on this transport carrier and hold the plastic preforms, and a plurality of second application devices which act upon the plastic preforms with a flowable medium,
wherein
the plastic preforms are transferred directly from the first sterilization unit to the second sterilization unit,
wherein
the first application devices or components of the first application devices are arranged in a first position with respect to a longitudinal direction of the plastic preforms and the second application devices or components of the second application devices are arranged in a second position with respect to the longitudinal direction of the plastic preforms and the first and second positions are different.

12. The apparatus according to claim 2 ,
wherein
the sterilization device is arranged in the transport direction of the plastic preforms between the heating device and the forming device.

13. The sterilization device according to claim 5 ,
wherein
the first application devices and/or the second application devices are arranged on a rotatable carrier.

14. The sterilization device according to claim 5 ,
wherein
the sterilization device comprises a third sterilization unit, which comprises a rotatable transport carrier and a plurality of holding devices arranged on this transport carrier for holding the plastic preforms, as well as a plurality of application devices for acting upon the plastic preforms with a flowable sterilization medium.

15. The sterilization device ac

Assignees

• Krones Ag

Inventors

• Suppes Waldemar
• Geltinger Florian

Classifications

• A61L2103/23

  Containers other than laboratory or medical, e.g. bottles or mail · CPC title

• B08B9/42

  the apparatus being characterised by means for conveying or carrying containers therethrough · CPC title

• A61L2/18 Primary

  Liquid substances · CPC title

• B29C49/42405

  Sterilizing · CPC title

• A61L2202/15

  Biocide distribution means, e.g. nozzles, pumps, manifolds, fans, baffles, sprayers · CPC title