Abstract: A scanner comprises a conveyor device, a tunnel housing, a bed assembly housing, an isolating device, and one or two analysis devices. The tunnel housing, together with a top portion of the bed assembly housing, forms a substantially enclosed area for analyzing objects, and the bed assembly housing includes most of the components of the conveyor device. A frameless and coverless tunnel construction method clamps the frameless tunnel around the bed assembly housing, and uses a leaded curtain bracket and slot to increase the enclosed area within the tunnel housing for a given scanner width and height. For a coverless construction, the outside of the tunnel is finished cosmetically and any lead shielding is attached to the inside of the tunnel, instead of the outside. The conveyor device comprises a conveyor belt, rollers and a conveyor tracking device having first and second channels formed in first and second rails.

Abstract: A scanner apparatus comprises a tunnel housing having a top, two sides and entrance and exit openings; a bed assembly having a top and side portions wherein the side portions of the bed assembly are substantially fixed to the side portions of the tunnel housing to form a substantially enclosed area; an isolating device located at each of the entrance and the exit of the tunnel housing; a conveyor device for moving an object though the tunnel housing; and an analysis device for analyzing objects within the substantially enclosed area in the tunnel housing. The scanner apparatus has an essentially frameless structure which enhances its capability for scanning tall, wide items.