North American Philips Corporation

Aaron Blaustein

David J Haas

Ray C Lapof

Francis R Paolini

Chester D Rudd

William C Schimpf

The present invention provides a digital system including circuitry for imaging items passing on a conveyor belt through an X-ray fan beam. The circuitry of the present invention enables detection of the items as soon as the X-ray beam is pierced and an image of the items is maintained on a monitor following removal of the items from the X-ray beam. This enables detection of all items entering the X-ray beam, and subsequent inspection of the items.

Intrinsic object sensing in a digital fan beam X-ray inspection system

An article transfer and inspection apparatus comprising chamber-defining means, substantially impermeable to x-rays; and x-ray source for directing x-rays to a first portion of said chamber; feed and extraction conveyor systems individually having at least a portion thereof outside the chamber and respectively serving to introduce and remove an article into and from the chamber, the feed conveyor system being operable at a first speed; an inspection conveyor system located between the feed and extraction conveyor systems and at least partly disposed at the chamber first portion, the inspection conveyor system being operable at a second speed at least equal to the first speed and serving to carry the article through the chamber first portion; and means for converting x-rays passing through the first portion and the article into a visual image. The apparatus can also include means for achieving a pre-determined spacing between various articles. Also, transfer apparatus for achieving pre-determined spacing between various articles. Also, the circuit for the spacing means.

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Oysterbay, NY, United States of America

Aaron Blaustein