Abstract: In electrographic apparatus a latent image on a flexible photoconductor is developed with toner particles at a development station and subsequently transferred to a receiver sheet, such as a copy sheet, and then fused to the sheet. Sometimes unwanted particles are on the photoconductor, including the area where an image is to be developed on the photoconductor. These particles are removed by a magnetic brush system located closely adjacent the surface of the photoconductor prior to the charging station. A biased ski located under the photoconductor presents the photoconductor to the cleaning nap at a predetermined uniform pressure and a desired distance, so that the photoconductor is uniformly cleaned and buffed.

Abstract: A planar array of microcells is formed in a support. An electrostatic charge pattern is established on the support differentiating first and second interlaid sets of microcells. An electrographic imaging composition is introduced into the first set of microcells, and a second, differing imaging composition is introduced into the second set of microcells. Multicolor photographic elements, particularly dye image transfer photographic elements, can be prepared.

Abstract: Personal identification documents are fabricated by liquid developing an electrostatic image on a photoconductive insulating member to form a high resolution toner image which includes a visually verifiable feature of the authorized document holder and thermally transferring such image from the photoconductor to a core substrate having general authenticating data or to a cover sheet which is subsequently laminated to such a core substrate.