Abstract: Novel electrophotographic development carrier particles for use with toner particles comprising a plurality of core particles coated with fluorinated carbon or a fluorinated carbon containing resin and an electrophotographic process comprising forming an electrostatic image on the surface of a photoconductive member and contacting the image with a developer mixture comprising finely divided toner particles mixed with such electrophotographic development carrier particles.

Abstract: An improved image resolution in thermo-transfer duplicating processes is accomplished by means of dispersing a plurality of thermally conductive particles in the dye-wax layer of transfer material used in such processes and applying an electrical or magnetic field to the transfer material layer sufficient to orient and align the particles parallel to the direction of the field. In this way the improved dye-wax layer of transfer material is capable of greater thermal conductivity in the direction transverse to the layer than in the lateral direction of the layer.

Abstract: An improved process for electrostatic reproduction. A transparent charged sheet of insulating material, such as a thin insulating film bearing a uniform electrostatic charge on one side thereof, or an electret, is placed against an electrostatically charged photoconductive surface on a suitable substrate to form a temporary composite. The photoconductive surface is then exposed to a light pattern and the free surface of the transfer sheet is developed to provide a visible image corresponding to the light pattern. This image is fixed on the transfer sheet or transferred to a receiving sheet after the transfer sheet has been removed from the photoconductive surface. Further copies can be made by reapplying the transfer sheet to the photoconductive surface and redeveloping the free surface of the transfer sheet when in place on the photoconductive surface.

Abstract: An improved image resolution in thermo-transfer duplicating processes is accomplished by means of dispersing a plurality of thermally conductive particles in the dye-wax layer of transfer material used in such processes and applying an electrical or magnetic field to the transfer material layer sufficient to orient and align the particles parallel to the direction of the field. In this way the improved dye-wax layer of transfer material is capable of greater thermal conductivity in the direction transverse to the layer than in the lateral direction of the layer.

Abstract: A thin insulative film is applied to be in direct contact with a surface carrying an electrostatic image which has a potential sufficient for adherence by induction of toner to the insulative film but insufficient to discharge when in contact with or upon separation of the toned insulative film. When the surface is photoconductive, it is exposed before or after contact with the insulative film to a pattern of discharging radiation to form an electrostatic image thereon. As one form of image development, toner is applied to the insulative film while in direct contact with the imaged surface. Thereafter, the toner image may be transferred to a support member. Toning and toner transfer is repeated without further charge and without further exposure.