Article irradiation system with multiple beam paths

• US 6,583,423 B2
• Filed: 11/16/2001
• Issued: 06/24/2003
• Est. Priority Date: 11/16/2001
• Status: Expired due to Term

• Current Assignee: Ion Beam Applications s.a.
• Original Assignee: Ion Beam Applications s.a.
• Inventors: Rose, Graham Thomas
• Primary Examiner(s): Lee, John R.
• Assistant Examiner(s): Gurzo, Paul M.
• Application Number:
  US09/987,966
• Publication Number:
  US 20030094581A1
• Time in Patent Office: 585 Days
• Field of Search: 250/453.11, 250/454.11, 250/455.11, 378/64, 378/68, 378/69
• US Class Current: 250/453.11
• CPC Class Codes: G21K 5/10 with provision for relative movement of beam source and object to be irradiated

Abstract

A system for irradiating articles is disclosed. The system has multiple beam paths and is capable of irradiating articles with x-rays or electron beams (e-beams). The system is comprised of a single radiation source producing multiple beam paths. At least one of the beam paths is configured to irradiate articles with x-rays and at least one other beam path is configured to irradiate articles with e-beams. The beam paths are each positioned to scan product carried on conveyors. The x-ray beam paths and e-beam have separate conveyor systems that operates independently from each other.

Claims

1. An irradiation system comprising:

a radiation source having at least one beam path extending substantially horizontally from the radiation source and at least one beam path extending substantially vertically from the radiation source;

a first conveyor system for transporting articles through the horizontal beam path having a process loop for transporting articles through the horizontal beam path one or more times comprising a rotator in the process loop for rotating the articles and a beam pass conveyor; and

a second conveyor system for transporting articles, through the vertical beam path, having a process loop to transport articles under or above the vertical beam path one or more times comprising a beam pass conveyor, wherein at least one of the conveyor systems has a means for entraining articles preceding a beam pass conveyor.

2. The irradiation system of claim 1 wherein at least one of the beam paths is an X-ray beam.

3. The irradiation system of claim 2 wherein at least one of the beam paths is an electron beam.

4. The irradiation system of claim 3 wherein the means for entraining articles is a high roller chain.

5. The irradiation system of claim 4 wherein at least one of the beam pass conveyors has a continuous chain in the beam path.

6. The irradiation system of claim 5 further comprising totes and/or trays for transporting articles, wherein the totes and/or trays are conveyed by the conveyors.

7. The irradiation system of claim 6 wherein at least one of the beam pass conveyors has a means for capturing a tote and/or tray.

8. The irradiation system of claim 7 wherein the means for capturing a tote and/or tray is a rack that mates with extended pins on a conveyor chain.

9. The irradiation system of claim 8 wherein the conveyors systems are floor mounted.

10. The irradiation system of claim 9 where the irradiation system further comprises an upper level and a lower level, wherein the first conveyor system and the radiation source are located on the upper level and the second conveyor system is located on the lower level, and wherein the vertical beam path is directed substantially downward.

11. The irradiation system of claim 10 further comprising:

a lowerator for lowering trays from the upper level to the lower level; and

an elevator for raising trays from the lower level to the upper level.

12. The irradiation system of claim 11 further comprising a third conveyor system located above the first conveyor system and a beam path extending substantially upwardly from the radiation source, wherein the third conveyor system transports articles through the upwardly extending beam path.

13. An irradiation system comprising:

an upper level;

a lower level;

a middle level

a radiation source, located on the middle level, having at least one beam path extending substantially horizontally from the radiation source, at least one beam path extending substantially downward from the radiation source, and at least one beam path extending substantially upward from the radiation source;

a first conveyor system, located on the middle level for transporting articles through the horizontal beam path one or more times and having a rotator for rotating the articles

a second conveyor system, located on the lower level, for transporting articles under the vertical beam path through the vertical beam path one or more times; and

a third conveyor system, located on the upper level, for transporting articles over the vertical beam path one or more times.