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US 6,663,280 B2Granted
Inspection unit
AssigneeHeimann Systems GmbH
InventorGerhard Doenges
Life of this patent
Estimating the term…
Abstract
An inspection apparatus having at an entrance and an exit of a radiation tunnel a radiation-shielding curtain so that no ionized radiation can exit from the inspection unit as a luggage piece or another object to be inspected is passed into or out of the inspection unit. A plurality of light curtains, which are arranged at a spacing, one behind the other, so that the coefficient of fiction (μ) is smaller than when the heavier curtain is provided.
Claims12
An inspection apparatus comprising:
- a radiation tunnel having an entrance and an exit;
- a conveyor for transporting objects from the entrance toward the exit of the radiation tunnel;
- a radiation zone formed within the radiation tunnel, the radiation zone having a least one radiation source and at least one corresponding detector;
- and
- at least one pair of shielding curtains positioned adjacent to one another in a transport direction at the entrance of the radiation tunnel, the at least one pair of shielding curtains being spaced from one another at a distance of at least one-half the length of a foremost shielding curtain measured from an upper region of the radiation,tunnel, the upper region being positioned opposite the conveyor.
2 more elements
An inspection unit comprising:
- a radiation tunnel having a radiation zone defined by at least one radiation source and at least one detector arranged towards the radiation source, the radiation tunnel having at least one entrance that is shielded outwardly by a radiation shielding apparatus,
- wherein the radiation shielding apparatus comprises:
- at least two functionally-cooperating curtains arranged at a minimum spacing, one behind the other, wherein a lead-equivalent value, which is needed for the required shielding, is distributed between the two functionally-cooperating curtains, and wherein the minimum spacing between the two functionally-cooperating curtains is at least one-half the length of one of the two functionally-cooperating curtains.
Dependencies are inferred from the claim text.