Abstract:
A METHOD OF RECOVERING PERSISTENT PHOTOCONDUCTORS IS DISCLOSED. AFTER A FIRST IMAGE IS PRODUCED ON THE PHOTOCONDUCTIVE SURFACE, THE SURFACE IS UNIFORMLY CHARGED TO A PRE-SELECTED VOLTAGE TO PRODUCE A DEVELOPABLE IMAGE. THE FIRST CONDUCTIVE IMAGE IS NO LONGER DEVELOPABLE.
Abstract:
IMPROVED VISUAL IMAGE DISPLAY DEVICE A visual image display device with improved resolution contains a pair of conductive electrodes in spaced relationship. Adjacent one electrode is a first barrier layer which is typically a resin such as polyamide containing a readily oxidizable and reducible material such as zinc nitrate. Adjacent the other electrode is a thin film of solvent, for example, 1, 2-dichloroethane. Positioned between the film of solvent and the first barrier layer is a second barrier layer which is a normally light transmitting recording medium. The second barrier layer is both photoionizable and capable of electrochemically producing a colored species. Typically the second barrier layer is a solid containing a resin such as polyvinyl butyral, an active material such as l-p-anisyl-3 diethylamino styryl-5-diethylaminophenyl-2-pyrazoline and, in selected embodiments, an activator such as carbon tetrachloride.
Abstract:
HIGH EFFICIENCY ELECTROCHROMIC DISPLAY DEVICE This invention relates to a reversible display device based upon the electrochromic properties of triaryl pyrazoline compounds when used in conjunction with a complementary redox material.
Abstract:
This invention relates to a reversible display device based upon the electrochromic properties of triaryl pyrazoline compounds when used in conjunction with a complementary redox material.
Abstract:
An image is formed by exposing to a light pattern a plate comprising a substrate and only a single layer of a photoconductive, non-polymeric, film forming, pyrazoline, oxadiazoles or fluorenone organic compound which has a glass transition temperature below 200 DEG C. and which has both a crystalline phase and an amorphous phase, and developing the plate by causing a selective change in phase between the light exposed and non-exposed areas.
Abstract:
of the Invention An organic photoconductor comprising a charge generation layer and on top thereof a charge transport layer having a higher concentration of charge transport molecules nearer the charge generation layer than in the top most portion.
Abstract:
POLYVINYL ACETATE LAYER FOR THERMAL TRANSFER PRINTING of the Invention A resistive ribbon for thermal transfer printing is formulated with a layer of polyvinyl acetate as the layer closest to the surface being printed upon. SA980036