| 摘要 |
<p>A method and apparatus for reproducing an image and transferring same onto a substrate (22). A positive cylindrical electrode (30) is rotated about its longitudinal axis (64) at a substantially constant speed, the positive electrode having a passivated surface (34) defining a positive electrode active surface. A plurality of negative electrolytically inert electrodes (78) electrically insulated from one another are arranged in rectilinear alignment to define a series of corresponding negative electrode active surfaces disposed in a plane parallel to the longitudinal axis (64) of the positive electrode (30) and spaced from the positive electrode active surface (34) by a constant predetermined gag, the negative electrodes (78) being spaced from one another by a distance at least equal to the electrode gap to prevent edge corrosion of the negative electrodes (78). The positive electrode active surface (34) is coated with an olefinic substance and a metal oxide to form thereon micro-droplets of olefinic substance containing the metal oxide in an amount to prevent corrosion of the positive electrode (30). The electrode gap is filled with a colloidal dispersion containing an electrolytically coagulable colloid. Selected ones of the negative electrodes (78) are electrically energized to cause point-by-point selective coagulation and adherence of the colloid onto the olefin and metal oxide-coated positive electrode active surface, thereby forming a series of corresponding dots of colored, coagulated colloid representative of a desired image. The dots of colored, coagulated colloid are then contacted with a substrate (22) to cause transfer of the colored, coagulated colloid onto the substrate and thereby imprint the substrate with the image.</p> |
