摘要:
Dielectric sealing of porous anodized aluminum, in which moisture in the pores of the oxide coating formed by hardcoat anodizing is removed, and the porous anodized surface then impregnated with a dielectric wax. Suitable wax sealants include Carnauba and Montan waxes. The anodized member is preliminarily heated to a temperature in the range 120.degree.-180.degree. C. in order to drive off moisture and other substances from the pores. This heating process may be continued for the purposes of impregnating the pores with the wax sealant, which is applied as a hot melt. Alternatively, the preliminary dehydration is achieved simply by heating the member to the impregnating temperature, with no separate dehydration stage. Any excess material remaining on the member's surface is removed. The resulting product has excellent resistivity and dielectric properties, and maintains these properties at elevated humidities. After removing material from the member's surface, the member may be polished to a better than 20 microinch finish, achieving favorable toner release characteristics where the member is used for pressure transfer of a toner image.
摘要:
An electrostatic imaging device including an elongate conductor coated with a dielectric, and a transversely oriented conductor contacting or closely spaced from the dielectric-coated conductor. A varying potential between the two conductors results in the formation of a pool of ions of both polarities near the crossover area. Ions are selectively extracted by means of an extraction potential to form a discrete, well-defined charge image on a receptor surface.
摘要:
Imaging methods and imaging devices are described according to some aspects. According to one aspect, an imaging method includes defining a plurality of first portions of a layer of a marking agent corresponding to an image to be formed, removing the second portions of the marking agent after the defining, increasing a charge density of the first portions of the marking agent after the removing, and transferring the first portions of the marking agent after the increasing.
摘要:
A method and article providing different images from differing viewing angles. The image side of a lenticular sheet is printed with radiation sensitive image layer and cured using a collimated radiation source located at a viewer position with respect to the lenticular surface. Uncured imaging material is removed from the printed surface as by rinsing, and the resulting clear region of the imaging surface may be processed further in a variety of ways. The clear region may be left unprinted, or printed with a second image different from the first, or printed with a stereoscopic image that combines with its pre-printed mate to form a three dimensional image. The clear region also may be vacuum metallized or chemically plated to form a highly reflective surface. The method permits use of relatively thin lenticular sheeting.
摘要:
An ion generator for the formation of electrostatic images includes two electrodes (a "control electrode" and a "driver electrode") at opposite faces of a solid dielectric member which are electrically actuated to form ions in an air region adjacent the control electrode; a third, "screen" electrode; and an additional, "deflection" electrode, which together with the screen electrode modulates ion flow to an imaging surface. Ions of a given polarity are attracted toward the imaging surface by an accelerating field resulting from a direct current potential of the control electrode. The screen electrode is maintained at a screen potential to control passage of ions through one or more apertures therein, while a further, deflection potential applied to the deflection electrode provides an additional level of control over the size, shape and location of the resulting electrostatic images. The deflection electrode may take the form of a conductive member on one side of the ion path, or two or more conductors straddling this path. This arrangement provides an additional level of multiplexing, simplifies the requirements of electronic drive circuitry, and improves image definition.
摘要:
Method of printer color error correction employing the rapid alternate viewing of a scanned original color image file and an image file formed by scanning an image printed by the printer whose error is to be corrected. Color errors appear as a blinking or flickering feature in the viewing monitor. Adjustments are made to the original color image file to eliminate or minimize flicker. The adjusted color file is then employed in printing a color corrected image. Another embodiment provides the method of the invention for real time color correction in images printed on conventional or digital printing presses.
摘要:
Imaging systems and methods are described. In one aspect, an ink layer having an electrorheological fluid composition including a suspension of colorant particles dispersed in an electrically insulating carrier fluid is formed on a surface of an electrically conducting substrate. A charge image is projected onto the ink layer to selectively form charge-stiffened regions adhering to the electrically conducting substrate and representing respective regions of the projected charge image. Non-charge-stiffened ink layer components are physically separated from the charge-stiffened regions.
摘要:
Methods for enhancing the visibility of and imparting a metallic luster to holographic and diffraction pattern surface embossments on transparent media such as plastic films (12) are disclosed. Enhancement is achieved by (1), metallic effect dyes or (2), metal flake inks containing minimal quantities of resinous binders (3), inks containing crystalline pigments that have metallic visual effects, or (4), inks containing pigments formed of optical stacks. The solvent used during application of the dye or ink must not be a solvent for the embossed surface.
摘要:
Method and apparatus for charged particle generation, particularly for use in electrographic imaging, in which a drive electrode and an isolation electrode are substantially in contact with opposite sides of a solid dielectric member, and a discharge electrode is placed on the same side of the solid dielectric member as the isolation electrode to define a discharge region. A high voltage time varying potential is imposed between the drive electrode and the discharge electrode to produce charged particles in the discharge region, and the isolation electrode is capacitively coupled to the drive electrode but otherwise is electrically isolated. The discharge electrode and isolation electrode are not coplanar and the discharge region does not border on the solid dielectric member. In a first embodiment, a dielectric shelf is placed intermediate an apertured discharge electrode and the isolation electrode, to facilitate the inception of discharges. In an alternative embodiment the discharge electrode is an elongate structure placed over the isolation electrode and supported by an apertured dielectric layer.
摘要:
Charge transfer imaging method and apparatus using a photoreceptor assembly. The assembly, which is formed by the interposition of a semiconducting substrate between a photoreceptor and a conducting base member, is used to transfer an image to a dielectric member with reduced image degradation.