Abstract: A system for electrostatic reproduction in which a carrier surface is charged with an image, the image-charged surface is presented adjacent a receiving surface, and a liquid or powder developer is selectively charged and is presented between the image-charged surface and the receiving surface to produce a developed image on the receiving surface.

Abstract: A method and an apparatus for the development of electrophotographic or electrosensitive paper comprising a tank having a curved bottom and capable of holding a liquid developer at a constant level; metallic roller means situated in the tank so that the level of developer in the tank is located at a zone wherein the distance between the metallic roller means and the tank wall is the least and does not exceed 5/10mm, a first pair of rollers for feeding said paper into the tank and a second pair of roller means for wiping the papers as they leave the developer and carries them to a receiving point and means for inducing to the metallic roller an electrical potential while grounding tank.

Abstract: An improved electrophotographic process, where the image to be reproduced is transferred onto a photoconductive support as an image of electric charges, in which image of charges is transferred from a photoconductive support in virtual contact with a dielectric support to the dielectric support, the improvement comprising completely discharging the photoconductive support before or at the instant of separation of the dielectric support and photoconductive support. The electrophotographic reproduction apparatus of the present application comprises means for producing an electrostatic image on a dielectric support means to bring said dielectric support into virtual face-to-face contact with a photoconductive support, means to transfer the electrostatic image to the dielectric support from the photoconductive support, and means to completely discharge the photoconductive support subsequent to the transfer of charges but before the separation of the dielectric support and photoconductive support.

Abstract: A device and a process for the liquid development of electrostatic latent images on a sheet surface which comprises: moving sheet material having said electrostatic latent images pass a reservoir containing developing liquid and having an open upper part and a lower part with openings through which the developing liquid passes, applying said sheet by capillary action against said lower part openings, whereby the amount of developing liquid is applied as needed.

Abstract: A corona charging device includes a U-shaped corona wire which is mounted between a pair of insulating blocks. One of the blocks has a spring biased plunger which engages the closed end of the wire to thereby place the wire in tension while the other block supports the legs of the wire. The legs of the wire have contact portions thereon which extend into a slot in the associated block. The contact portions are held in engagement with an electrical connector by a wedge. With this arrangement, the corona charging wire is readily replaceable.