A system for "capturing" charge within the structure of an electrophotographic imaging member in the imagewise exposed areas and thereby creating an electrostatic latent image in the imagewise exposed areas which in preferred embodiments of discrete non-touching particles of electrically photosensitive material stands up better against time, heat and light. Said imaging member is comprised of an insulating layer and electrically porous, mechanically discontinuous electrically photosensitive laye...

A liquid to solid addition polymerization imaging method comprises providing between two electrodes, one of which is in imagewise configuration, a polymerizable composition comprising unsaturated vinyl containing compounds; and, in the absence of chemical initiators, catalysts and electrolytes, applying an imagewise configured electrical field across the composition to polymerize the composition.

A method for reversing the sense of an input image which employs an electro-optic image recorder and novel imaging technique. An unscreened electro-optic image recorder is sequentially exposed to a grating pattern and then to a reading image. The grating exposure produces large surface deformations on the recorder and the bright areas of the imagewise exposure reduce and/or remove the deformations.

A layer of a suspension of electrically photosensitive particles in an insulating carrier liquid is coated onto a transparent, conductive electrode. A second electrode in roller configuration is caused to traverse the free surface of the suspension while an electrical field is imposed across the suspension between the two electrodes. The imaging suspension is illuminated imagewise ahead of the nip formed by the roller electrode which causes the illuminated electrically photosensitive particles t...

A nematic liquid crystalline composition having positive dielectric anisotropy is provided in the homeotropic texture by contact with a layer of an electrically insulating polysiloxane elastomer. An electrical field is then applied parallel to the molecular axes of the nematic resulting in reorientation of the nematic molecules.

Method and apparatus for maintaining the conductance of liquid crystalline compositions comprising pure transstilbene liquid crystalline materials at a level sufficient to allow dynamic scattering of the composition.

There is disclosed an imaging system for forming a plurality of images on the same surface. The imaging system includes an electro-optic imaging member comprising a voltage or current-sensitive light modulating layer, a layer of photoconductive material which exhibits persistent photoconduction properties and a layer of material capable of generating photoinjection currents when struck by radiation which it absorbs.

An imaging system using a migration imaging member comprising a softenable photoconductive material with a fracturable layer of migration marking material contacting the softenable photoconductive material and having the fracturable layer spaced apart from at least one surface of the softenable layer and typically contiguous to the free surface of the softenable material. Imaging with a member comprising a softenable photoconductive binder material with marking particles therein dispersed throug...

An electrostatographic developing material comprising particles, said particles including finely divided electroscopic toner material and a minor proportion based on the weight of said toner material of at least one finely divided compound selected from the group consisting of phthalic acid, isophthalic acid, terephthalic acid, the metal and ammonium salts thereof; and a method of electrostatographic development employing said developing material.

A liquid meniscus developing system for continuously and rapidly developing latently imaged migration imaging members, substantially free of background material is disclosed.