Abstract:
Disclosed are electrically photosensitive polymers in which recurring units contain vinylene-1,4-phenylene-imino-1,4-phenylene-vinylenearylene groups included in the polymer backbone. In one embodiment, the disclosed polymers are employed as the principal electrically photosensitive constituent in migration imaging dispersions and elements. In another embodiment, the polymers are employed as sensitizers for electrically photosensitive colorants having spectral absorption peaks in the 400-500 nm wavelength region of the spectrum. The polymers are employed in migration imaging dispersions and elements.
Abstract:
A finely divided imaging composition is provided comprising at least two differently colored pigment particles dispersed and bound in a polymeric matrix, at least one of said particles of said matrix being electrically photosensitive, said imaging composition exhibiting the resultant color of the differently colored pigments and being capable of forming images in said resultant color without color or particle separation. Images formed of this composition can be selectively modified.
Abstract:
An imaging method is disclosed comprising providing an imaging member comprising a first layer of softenable material containing migration material overlying a second layer of softenable material which is substantially free of migration material wherein at least one of the layers of softenable material contains a surface skin located at the interface between the layer of softenable material. This member is latently imaged and developed by softening whereby the migration material migrates through the first layer of softenable material and the interface, where the surface skin is located, and in depth in the second layer of softenable material thereby forming an imaged member. Background of the migration material is then removed from the imaged member by splitting the member at the interface thereby obtaining an image with excellent imaging properties.
Abstract:
The ion distribution in a high molecular film is controlled by selectively altering the ion pattern under a combination of heat and electric field where at least one of the latter is applied to the film in the desired pattern. Selectively altering the ion pattern is accomplished by any one of the following: lateral shifting of ions in one film, removal of ions from one film and concurrent injection into a second film; removal of ion disassociative molecules from one film and concurrent injection into a second film. Ions which color the film are preferably used to permit visual inspection of the ion pattern. The film with the ion pattern is particularly adapted for electro-photographic copying.
Abstract:
A migration imaged member comprising an image pattern of material comprising a dye or a dye receptive material is contacted with a dye transfer member or a dye respectively to form a dye image on the dye transfer member or the imaged member respectively.
Abstract:
A migration imaging system wherein migration imaging members typically comprising a substrate, a layer of softenable material, and migration marking material, additionally contain one or more overlayers of material to produce improved results in the imaging system. The overlayer may variously comprise another layer of softenable material, a layer of material which is harder than the softenable material layer, or a gelatin layer.
Abstract:
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 throughout said softenable binder is also disclosed. Imaging is accomplished by providing a migration force across the migration imaging member and developing the member whereby the migration marking material migrates in depth in the softenable layer in imagewise configuration.
Abstract:
A method of imaging which comprises providing an imaging structure having a support, an overlayer of softenable material containing a particulate photosensitive material, forming a latent image on said structure, developing said latent image whereby an image is formed by the selective migration of photosensitive particles in image configuration, and terminating said migration by uniform exposure to activating radiation at a time subsequent to the beginning of said developing step.
Abstract:
A method of imaging wherein an electrically photosensitive imaging layer comprises electrically photosensitive fundamental alpha metal-free phthalocyanine particles greater than 1 micron in size. The imaging layer is placed between two members and imagewise exposed to an electric field and electromagnetic radiation to which the electrically photosensitive particles are sensitive. Upon separation of the members exposed particles of the layer are independently removed from the layer in imagewise configuration thereby forming a copy of the original image on one of the sheets. Production of polychromatic and monochromatic images is enhanced by control of the fundamental particle size.