Abstract:
A device provided with a developing roller formed on its periphery with a multitude of valleys and valley, with the crests serving as fluid containing sections which are supplied with a developing fluid. The device is also provided with a doctor member made of a resilient, fluid absorbing material and adapted to adjust the level of the fluid contained in each fluid containing section such that the fluid is maintained at a level below the crests, or the maximum diameter portions of the developing roller. A recording sheet on which an electrostatic image is formed is brought into contact with the developing roller so that the fluid contained in the fluid containing sections selectively adheres to the electrostatic image to render the image visible. The visible images produced by this method may vary in density depending on the quantities of electricity carried by the charged regions of the electrostatic images.
Abstract:
AN ELECTROSTATOGRAPHIC IMAGING SYSTEM WHEREIN AN ELECTROSTATIC LATENT IMAGE IS DEVELOPED BY PLACING THE IMAGEING SURFACE IN DEVELOPING CONFIGURATION WITH A PATTERNED APPLICATOR SURFACE HAVING A SUBSTANTIALLY UNIFORM DISTRIBUTION OF RAISED PORTIONS OR "LANDS" AND DEPRESSED PORTIONS OR "VALLEYS" AND CONTAINING A RELATIVELY NON-CONDUCTIVE LIQUID DEVELOPER IN THE DEPRESSED PORTIONS THEREOF WHILE THE RAISED PORTIONS ARE SUBSTANTIALLY FREE OF DEVELOPER.
Abstract:
A rotary planographic printing press wherein a hydrophobic photoconductive recording layer carried on the printing cylinder of the press is exposed to acquire a latent photoconductive image of the information to be printed and is then developed by means of an aqueous conductive developing liquid applied to the photoconductive recording layer under an external electrical field of such a polarity as to attract such liquid differentially into wetting relation with the recording layer surface in accordance with the exposed image thereon, a hydrophobic planographic printing ink is applied to the thus selectively wetted recording layer so as to adhere selectively to the unwetted areas of the recording layer while being repelled from the wetted areas thereof, and the ink image thus obtained is printed onto a copy sheet fed to the press. Preferably the press includes an off-set cylinder operating in conjunction with an impression cylinder. Preferably, the aqueous developing liquid and the hydrophobic printing ink are applied by means of a common applicator roller onto which is applied a fine screen pattern of the ink and in the uninked open areas the aqueous developing liquid is applied.
Abstract:
An image forming apparatus includes a reciprocally movable carriage, an image forming unit, a first drive source, a vibration suppressor, and a vibration-suppression controller. The reciprocally movable carriage moves in a main scan direction. The image forming unit is mounted on the carriage. The first drive source moves the carriage. The vibration suppressor suppresses vibration caused by movement of the carriage, and includes a vibration suppression member having a mass smaller than a mass of the carriage and a second drive source independent of the first drive source to move the vibration suppression member. The vibration-suppression controller drives the second drive source to cause the vibration suppressor to perform vibration suppression operation during at least one of an acceleration period and a deceleration period of the carriage, and stops movement of the vibration suppression member during a constant-speed period of the carriage.
Abstract:
In a device and method for electrographic printing or copying, a latent image carrier is provided having a potential pattern corresponding to an image pattern. An applicator pattern is provided that carries a liquid layer of ink spaced from a surface of the latent image carrier by an air gap. A surface of the applicator element is provided with a structure with which detachment of droplets from the liquid layer is facilitated, the structure having a plurality of first areas having an increased electrical conductivity, a plurality of second areas that differ from a remaining surface based on a portion of surface energy, and a plurality of third areas formed as microscopic elevations. A force field is applied in the air gap to act on the liquid layer. By overcoming the air gap, droplets are transferred from the liquid layer on the surface of the latent image carrier by overcoming the air gap for inking a latent image to create an inked image.
Abstract:
A device for cleaning an image carrier of residuals of an ink image, in which for inking the latent image on a latent image carrier, droplets are transferred from a liquid layer onto the surface of the latent image carrier by overcoming an air gap. The cleaning device is arranged at the circumference of the image carrier and removing the residual ink remaining after transfer of the image inked with a liquid ink is removed from the surface of the image carrier.
Abstract:
In an image forming apparatus having a liquid developing device, a thin layer of dense and viscous developing liquid is formed on a developer carrier and brought into contact with a latent image electrostatically formed on the surface of an image carrier in order to develop it. A preselected electric field is formed between the developer carrier and a device for regulating the thickness of the above layer, providing a dense layer with a uniform high toner content and an excess liquid surface layer. The excess liquid surface layer, formed with the developing liquid layer, is removed by a developing layer removing device. With this configuration, the apparatus ensures images free from irregularity.