摘要:
A METHOD OF DEVELOPMENT OF AN ELECTROSTAIC LATENT IMAGE IS GIVEN WHEREIN A CHEMICALLY STABLE, NONAQUEOUS, AMBIPOLAR, LIQUID DEVELOPER COMPRISING AN OLEAGINOUS VEHICLE, SOLID COLORAT PARTICLES, A DISPERSANT SOLUBLE IN THE LIQUID DEVELOPER WHICH IS CAPABLE OF SUBSTANTIALLY SUPPRESSING BACKGROUND DEPOSITS, AND A FIXING AGENT MISCIBLE WITH THE LIQUID WHICH PENETRATES THE COPY PAPER IS EMPLOYED TO DEVELOP AN ELECTROSTATIC LATENT IMAGE BY PRESENTING THE DEVELOPER TO THE IMAGE BEARING SURFACE BY AN APPLICATOR HAVING A SUBSTANTIALLY UNIFORMLY PATTERNED SURFACE OF RAISED PORTIONS AND DEPRESSED PORTIONS WHICH CONTAIN THE DEVELOPER.
摘要:
In a graphical recording apparatus, a substantial and continuous flow of marking liquid moves between a discharge port and a vacuum port in communication with a record receiving medium. In both electrographic printing and ink pen embodiments, the vacuum port comprises a vacuum chamber surrounding the discharge port. The charge despositing styli in the electrographic printing embodiment are also surrounded by the vacuum chamber.
摘要:
An electrophotographic liquid developer may be prepared by admixture of a dye and a mordant therefor in the presence of (1) a suitable binder, (2) a solvent for the binder and (3) a liquid precipitation medium; the solvent for the binder is substantially removed; and the resultant dope is added to a suitable liquid carrier to form a dispersion of finely divided toner particles in the liquid carrier. The toner particles thus formed contain a dye-mordant salt precipitate dispersed in the binder.
摘要:
An electrophotographic liquid-developing method comprising controlling the polarity of the toner by varying the temperature of the developer solution. An electrostatic charge-substrate having an electrostatically charged latent image is immersed in the developer solution to convert such latent image into a visible image. The developer solution comprises a toner consisting of pigment particles and at least one resin selected from the group consisting of alkyd resin, phenol resin and vinyl resin, and a carrier liquid in which said toner is dispersed. The carrier liquid comprises at least one dispersion medium having different affinities to said resin depending on the temperature.
摘要:
An electrophotographic liquid developer is provided which comprises a dispersion of at least one coloring material in particle form, asphalt and synthetic resin in an organic solvent having an electrical resistance of no less than 108 Omega . The liquid developer is useful for the preparation of lithographic plates.
摘要:
DYES ARE BLENDED WITH A ZINC OXIDE AND RESIN MIX BEFORE APPLICATION TO A PAPER OR OTHER PRINTING BASE FOR ELECTROSTATIC PRINTING. THE DYES ARE SELECTED TO RENDER THE PAPER ESSENTIALLY PANCHROMATIC, WHEREBY DIRECT BLACK AND WHITE PRINTS ARE MADE AT LOW COST FROM A COLOR TRANSPARENCY.
摘要:
A copying apparatus is provided in which an image-fixing hot air blower normally has a heating unit maintained at a lower temperature by thermostatic means in the image-fixing area with an overriding control circuit bypassing the thermostat means in response to initiation of a copying cycle to increase the temperature of the heating element to its operating range.
摘要:
An electrophotographic liquid developer useful in converting an electrostatic latent image formed on an insulating surface into a visible or material image, comprising a nonpolar, highly insulating carrier liquid and a toner powder which contains therein or absorbs a finely divided proteolytic enzyme, or consists of a finely divided proteolytic enzyme, having a suitable polarity of charge dispersed in said carrier liquid.
摘要:
An electrostatic copy apparatus including a cabinet with an upright container mounted therein. The upright container is connected to a front panel on the cabinet which can be pulled forward for providing access to the upright container. Paper is directed into the upright container and a liquid applicator applies liquid to the paper.