Abstract: A deformation imaging system including an imaging member comprising a layer of a surface deformable material, a layer of an elastomer material, and means for establishing an imagewise electrical field across at least the surface deformable material layer and/or the elastomer layer. Embodiments wherein the surface deformable material layer and the elastomer layer are adjacent each other and embodiments wherein these layers are separated from each other are described. Various techniques for subjecting the imaging members to an electrical field and imaging methods utilizing the imaging members are also disclosed.

Abstract: There are described novel yellow compounds which are represented by the formula ##STR1## wherein X is a member selected from the group consisting of ##STR2## The compounds may be used for various applications and preferably are utilized as imaging particles in the photoelectrophoretic imaging method.

Abstract: A fracturable manifold image is created in an imaging layer sandwiched between donor and receiver sheets by a conventional manifold imaging process using an imaging electrostatic field of a predetermined voltage. The fracturable manifold image is erased by uniformly applying in the dark a second electrostatic field of the same polarity as the first field but of sufficiently greater strength to cause substantially the entire imaging layer to preferentially adhere to one of the sheets. After the fracturable image has been created, but before erasure, the sandwich can be separated while still under the influence of the first field to provide a positive image on one sheet and a negative image on the other sheet and then reassembled substantially in registration. Subsequent such images can be made and erased provided that the imaging field for each subsequent image has at least the strength of the next previous erasure field.

Abstract: Vacuum removal means for removing excessive developer material from a member having a latent magnetic image developed with magnetic developer material. The vacuum removal means comprises a chamber having entrance and exit ports of predetermined cross-sectional area such that the ratio of entrance port to exit port is sufficiently small to assure substantially uniform air flow across the entrance port when the chamber is subjected to negative pressure through the exit port. The entrance port of the chamber is in communication with means for subjecting the developed surface of the member to a substantially uniform shearing air flow when the chamber is subjected to the negative pressure. A second entrance port of equal cross-sectional area to the first entrance port may be provided to the chamber in association with gating means for selectively varying the cross-sectional area of each entrance port while maintaining a constant combined cross-sectional area for the entrance ports.

Abstract: A process for image reproduction comprises the steps of contacting a charge blocking surface on a photoreceptive body with a developer material containing charged toner particles, providing an electric field of predetermined polarity between the photoreceptor and a transfer medium for attracting the toner particles toward the photoreceptor surface, subjecting the photoreceptor to activating radiation in image configuration for inducing an electrostatic charge pattern in image configuration on the photoreceptor near an interface between the blocking layer and the developer material and providing an electric field of opposite polarity between the photoreceptor and the transfer medium for transferring the toner particles in image configuration to the transfer medium. Automated copying apparatus and photographic apparatus in accordance with features of the invention are provided.

Abstract: A direct current liquid crystal display device for reflection viewing comprises a dielectric mirror having at least one pair of titanium dioxide and silicon dioxide layers, the titanium dioxide layer being in contact with a layer of liquid crystalline composition, between two electrodes.

Abstract: A system for transforming an optically negative liquid crystalline composition from the focal-conic texture state to the Grandjean texture state by means of an applied electrical field which may be a D.C. electrical field or a relatively low frequency A.C. electrical field. Imaging and display systems wherein a member comprising a film of an optically negative liquid crystalline composition is imaged in a desired image configuration by the electrical field induced texture transformation system are also described.

Abstract: 3-Bromo-N-2"-pyridyl-8,13-dioxodinaphtho-(2,1-b;2',3'-d)-furan-6-carboxamid e is described as a new composition of matter along with its use in electrophotographic and photoelectrophoretic imaging processes.

Abstract: A system for transforming an optically negative liquid crystalline composition from the focal-conic texture state to the Grandjean texture state by means of an applied electrical field which may be a D.C. electrical field or a relatively low frequency A.C. electrical field. Imaging and display systems wherein a member comprising a film of an optically negative liquid crystalline composition is imaged in a desired image configuration by the electrical field induced texture transformation system are also described.

Abstract: 3-Bromo-N-2"-pyridyl-8,13-dioxodinaphtho-(2,1-b;3',3'-d)-furan-6-carboxamid e is described as a new composition of matter along with its use in electrophotographic and photoelectrophoretic imaging processes.