Abstract: A process for the conversion of X-rays into blue and/or green light with a phosphor which on exposure to X-rays emits light the spectrum of which contains main intensity lines below 460 nm and/or main intensity lines between 530 and 570 nm, wherein said phosphor comprises a gadolinium gallium garnet compound having following empirical formula:Gd.sub.8-x-y Ln.sub.y Ga.sub.x O.sub.12wherein: 5.14.gtoreq.x.gtoreq.4.90 and 0.45.gtoreq.y.gtoreq.0.001, and Ln is scandium (Sc) and/or one or more rare earth elements other than gadolinium.The invention is directed particularly to the use of said phosphor in an X-ray conversion screen applied in medical radiography.

Abstract: Method of transferring a liquid xerographic toner image between two elements one of which is a flexible sheet advancing along a straight line path and the other is advancing synchronously along an arcuate path around a fixed axis which path at one point is in close spaced proximity to the straight line path. The flexible element is supported by its margins alone and its unsupported region is subjected to a biasing force to deflect the same toward the other element and bring a liquid toner image, which is previously deposited, e.g., by developing an electrostatic charge pattern with liquid toner, on one of the mutually facing surfaces of the two elements, into direct contact with both element surfaces maintaining such surfaces apart. During the passage of the two elements through the point of close proximity an electrical potential gradient is applied across the elements during such passage to transfer the liquid toner from the surface on which it is deposited to the other element surface.

Abstract: A xerographic liquid toner image is transferred onto an image-receiving sheet carried along an arcuate path, e.g., on the peripheral surface of a rotating drum from the underside of a flexible sheet, e.g., a photoconductor sheet, while the flexible sheet is suspended by its margins from a moving carriage. The carriage is guided generally horizontally along a path above and proximate to the top of the drum periphery at a level such that the unattached central part of the flexible sheet, which is free to sag relative to its margins, is supported by the liquid toner image itself, out of contact with the image-receiving sheet, as the two sheets pass through an image transfer zone adjacent the top of the drum periphery.