Abstract: Apparatus for conveying articles of length L through an irradiation beam of width B, where L substantially exceeds B. The articles are supported on carriers which are suspended between and more along two tracks positioned with the beam therebetween. The carriers travel for a first distance with the articles extending transversely relative to the two tracks to permit close-packing of the carriers as they move toward the beam. As each carrier approaches the beam, it is reoriented relative to the two tracks to increase the exposure angle defined between (a) the carrier dimension along which the article extends and (b) the width of the beam. After exiting from under the beam each carrier is preferably returned to a transverse travelling orientation relative to the two tracks. The invention further includes the directing of carriers along monorails enroute to and/or from the two tracks.

Abstract: Apparatus for guiding a cable travelling along a longitudinal path through a beam of radiation in a shielded chamber, the apparatus including rollers disposed about the cable in a manner which prevents the leakage of radiation via apertures in the chamber through which the cable enters and exits. Specifically, the apparatus includes sets of rollers spaced at longitudinal intervals along the cable, the rollers in each set being positioned at angular intervals about the longitudinal axis of the cable. An angular offsetting of rollers in different sets, so that a roller in one set is longitudinally aligned with the spacing between rollers in other sets, is provided. By selecting rollers of prescribed dimensions, by placing the rollers at prescribed angular intervals in each set, and by angularly offsetting a plurality of sets by prescribed angles, a plurality of sets of rollers--when placed proximate to the entrance or exit to an aperture--can preclude radiation leakage through the aperture.