Abstract:
Planographic masters are prepared by contacting a suitable substrate with a layer of an imaging suspension including a dispersion of inert particles in an insulating carrier liquid. The imaging suspension is subjected to an electrical field and exposed to a pattern of electromagnetic radiation to which an electrically photosensitive vehicle is responsive for transferring charge to the inert particles. An image is formed on the substrate as a result of the migration of inert particles under the influence of the applied field. The substrate may be hydrophilic in which case oleophilic inert particles are used or the substrate may be oleophilic in which case hydrophilic inert particles are used.
Abstract:
An electrophoretic imaging process wherein a suspension of particles in a carrier liquid are placed between a photoconductive electrode and a second electrode. With an electrical field applied between the photoconductive electrode and the second electrode the photoconductor is exposed to imagewise radiation which causes particles on the surface of the photoconductive electrode to be driven away in image configuration by charge exchange with the photoconductive electrode. The migrating particles form a negative image on the second electrode leaving a positive image behind on the photoconductive electrode.
Abstract:
An imaging system wherein imaging particles are electrophoretically deposited imagewise on a receiving layer in response to a light image. The imaging particles comprise a chromogenic material and the receiving layer comprises a coreactant therefor. The chromogenic co-reactants are reacted on the receiving layer to form a colored well fixed, final image.
Abstract:
A photoelectrophoretic imaging system wherein electrically photosenstive pigment particles are dispersed in an insulating liquid exposed to a light image while subjected to an electrical field causing particle migration in image configuration. The particle pigment image is fixed by utilizing resinous particles which can be preferentially migrated to the image-bearing surface. Application of solvent or heat fixes the images.
Abstract:
A photoelectrophoretic imaging apparatus comprising two additional electrodes for increasing the density and reducing background level of an image reproduced at high speeds.
Abstract:
An improved photoelectrophoretic imaging process is provided comprising adding sufficient additional insulating carrier liquid to the imaging suspension to maintain the concentration of said suspension substantially constant during the period of contact with an absorbent copy web.
Abstract:
A THIN ELECTRICALLY INSULATNG TRANSFER INTERLAYER, WHICH IS SELECTIVELY RELEASABLE BY AREA, IS SANDWICHED BETWEEN A PHOTOSENSITIVE LAYER AND A RECEIVER MEMBER. THE SANDWICH IS EXPOSED TO AN IMAGE PATTERN OF ACTIVATING ELECTROMAGNETIC RADIATION FOR SAID PHOTOSENSITIVE LAYER WHILE MAINTAINING AN ELECTRIC FIELD ACROSS SAID SANDWICH. THE RECEIVER MEMBER IS THEN STRIPPED AWAY TO SELECTIVELY TRANSFER AREAS OF SAID INTERLAYER IN IMAGE CONFIGURATION TO SAID RECEIVER MEMBER LEAVING A COMPLEMENTARY IMAGE PATTERN OF SELECTIVE AREAS OF INTERLAYER ON SAID PHOTOSENSITIVE LAYER.
Abstract:
A photoelectrophoretic imaging system wherein an imaging suspension made up of electrically photosensitive particles and inert particles dispersed in an insulating carrier liquid are exposed to a light image and a uniform electrical field. An image is formed by particle migration in image configuration. Either the electrically photosensitive particles or the inert particles migrate to form an image depending on the polarity of the field applied.
Abstract:
An imaging apparatus wherein a reusable imaging layer comprising a cohesively weak electrically photosensitive imaging material is sandwiched between a donor sheet and a receiver sheet, subjected to an electric field and exposed to an imagewise pattern of electromagnetic radiation to which it is sensitive. The donor and receiver sheets are then separated thereby fracturing the imaging layer in imagewise configuration. The imaging layer is rendered reusable by recombining the sandwich, subjecting it to an electric field while flood exposing the imaging layer to electromagnetic radiation to which it is sensitive. The apparatus is provided with a viewing station for viewing a positive or negative image.