Automated irradiator for the processing of products and a method of operation

• US 5,400,382 A
• Filed: 04/19/1992
• Issued: 03/21/1995
• Est. Priority Date: 04/19/1992
• Status: Expired due to Fees

• Current Assignee: Alpha Omega Neuro Technologies Limited
• Original Assignee: Alpha Omega Neuro Technologies Limited
• Inventors: Barnett, Craig W., Welt, Martin A.
• Primary Examiner(s): Dzierzynski, Paul M.
• Assistant Examiner(s): CHU, KIM KWOK
• Application Number:
  US07/872,542
• Time in Patent Office: 1,066 Days
• Field of Search: 378/67, 378/69, 378/64, 250/436, 250/437, 250/438, 250/453.11, 250/482.1, 99/451, 426/240
• US Class Current: 378/69
• CPC Class Codes: G21K 5/04 with beam-forming means
• CPC Class Codes: G21K 5/10 with provision for relative movement of beam source and object to be irradiated

Abstract

The invention describes the facility and method for controllably irradiating materials with gamma rays. Specifically, the invention concerns the processing of foodstuffs, medicines and other products by remote-controlled exposure to a radiation source while being transported by pallet carriers at adjustable distances in two parallel roller type assemblyline toting systems. A further feature of the invention is the computer-linked automated dosimetry system which is used to afford an effective protocol for product preservation, sanitization or sterilization as well as safety.

Claims

1. An irradiation facility for controllably irradiating products with gamma-rays comprising:

(a) a radiation source;

(b) means for loading a plurality of product to be irradiated on a carrier means;

(c) conveyor means for conveying product carrier means to two movable dwell units positioned in parallel proximity of the radiation source, said carrier means supportable by said movable dwell units such that said dwell units carry said carrier means when said dwell units move, said dwell units capable of maintaining constant spatial orientation of said carrier means relative to said radiation source;

(d) means for adjusting the position of the movable dwell units on either side of the radiation source;

(e) means for adjusting the position of the product carrier means on the dwell units;

(f) means for storing the radiation source in a radiation protective storage tank, which comprises a water-filled storage pool or a dry storage shielding cask;

(g) means for moving irradiating source into position for applying irradiating dosage to each carrier; and

(h) computer-linked sensor means therefor;

the irradiation facility having a radiation shielding wall enclosure open at one end, which end also comprises a recessed interior wall complex located for barrier-free conveyance of products to and from the radiation source.

2. The facility as claimed in claim 1, wherein the plurality of product comprises food, nutrients, or potables, cosmetic, medical or pharmaceutical products, toxic or infected waste.

3. The facility as claimed in claim 1, wherein the irradiation dose serves to preserve, process, or sterilize.

4. The facility as claimed in claim 1, wherein the irradiating source are selected from the group consisting of Cobalt-60 or Cesium-137.

5. The facility as claimed in claim 1, wherein the computer-linked sensor means is an automated radiation dosimetry system based on bar-coding.

6. The facility as claimed in claim 5, wherein a bar-code reader is at the entrance and exit phase of the conveyance means.

7. The facility as claimed in claim 1, wherein the conveyor means is a motorized roller track.

8. The facility as claimed in claim 1, wherein the dwell units are motorized for remote-control adjustable positions on either side of the radiation source, the positions being adjustable both in parallel and perpendicular directions.

9. The facility as claimed in claim 1, wherein the carrier means comprise pallets of various sizes.

10. The facility as claimed in claim 1, wherein the position of the carrier means relative the radiation source is controlled by limit switches.

11. The facility as claimed in claim 1, wherein the computer-linked sensor means coordinate, modulate, and terminate exposure to the radiation source of the product to be sterilized.

12. An irradiation facility for the remote-controlled treatment of a plurality of products or materials comprising:

(a) a radiation source;

(b) a conveyance system for transporting the products or materials on at least two movable parallel conveyors in a suitable proximity of the radiation source;

(c) the conveyance system having a plurality of carriers for the products or materials to be irradiated;

(d) the carriers being selectively transported to control speed, time and duration of irradiation and said movable parallel conveyors are capable of maintaining constant spatial orientation of said carriers relative to said radiation source;

(e) the parallel track conveyance system having motorized means to vary the track position relative to the radiation source; and

(f) the remote control of the irradiation process being monitored and directed by a computer-linked reader system, the reader system being a laser equipped detection device.

13. The irradiation facility of claim 12 wherein the remote-controlled treatment of products or materials comprises preserving or sterilizing foods, medical or pharmaceutical products;

sanitizing cosmetic products;

radiation processing of bonding plastics, alloys, or emulsions;

sterilizing or inactivating waste products;

radiation processing or sterilizing of food packages or utensils.

14. The irradiation facility of claim 13 wherein the remote-controlled treatment includes a loadshifting adjustment for uniformly irradiating product on pallets which are smaller than standard size.

15. A method for controllably irradiating a product with gamma-rays in an irradiation facility, comprising the steps of:

(a) placing the product to be irradiated in a carrier means mounted on a roller conveyor means;

(b) moving the carrier means on the conveyor means with connecting shuttle means to different positions on parallel conveyor tracks in proximity of the radiation source;

(c) adjusting the distance of the parallel conveyor tracks respective the radiation source;

(d) placing the radiation source into position for irradiation;

(e) irradiating the product with a radiation dosage while maintaining constant orientation positions of said carrier means relative to said radiation source; and

(f) optionally monitoring by a sensor means and controlling by the remote control means, the position of the parallel conveyor tracks, the placement of the radiation source, and the dosage of irradiation.

16. The method as claimed in claim 15 wherein the product comprises food, nutrients, or potables, cosmetic, medical or pharmaceutical products, infected or toxic waste substances.

17. The method as claimed in claim 15, wherein the controlled irradiation comprises a preserving, inactivating, sanitizing or sterilizing dose.

18. The method as claimed in claim 15, wherein each of the two parallel conveyor tracks comprise at least three dwell subunits.

19. The method as claimed in claim 15, wherein the conveyor tracks comprise a chassis with wheels running on a dual rail track system.

20. The method as claimed in claim 15, wherein the radiation source is selected from the group consisting of Cobalt-60 and Cesium-137.

21. The method as claimed in claim 15, wherein the carrier means comprises pallets.

22. The method as claimed in claim 15, wherein the conveyor means are motorized rollers.

23. The method as claimed in claim 15, wherein the computer-linked sensor means comprise an automated radiation dosimetry system based on bar-coding.

24. The method as claimed in claim 23, wherein the bar-coding is monitored by bar code reader at the entrance and exit portion of the conveyance system.

25. A method for treating food, medical or cosmetic products, utensils, devices or other products or materials by remote-controlled irradiation with gamma-rays comprising the steps of:

(a) placing product to be irradiated on a plurality of carriers, the carriers being mounted in an assemblyline tote system and being connected to remote control means;

the assemblyline tote system comprising at least two parallel conveyor tracks positioned in proximity to a radiation source connected to the remote control means;

(b) moving by remote-control the parallel conveyor tracks to different positions in the proximity of the radiation source to effect radiation processing; and

(c) monitoring the remote-controlled irradiation process by an automated dosimetry system using bar-code labelling and radiation colorimetry.

26. The method as claimed in claim 25 wherein the assemblyline tote system comprises conveyance controls allowing loadshifting of smaller than standard size carriers for uniform irradiation.