| 摘要 |
Process for the production of printed documents, particularly documents in booklet form, such as passport, and identifying documents, such as identity cards and the like. A set of signals defining the image to be printed are provided. For each color comprised in the image, causing a laser beam to impinge on a metal cylinder in a pattern controlled by the signals, whereby electrostatically to charge the surface of the cylinder at selectively predetermined spots. A reservoir of toner having the color is juxtaposed to the electrostatically charged cylinder, whereby the toner is attracted to the selectively predetermined spots and forms thereon a desired pattern. A temporary substrate is passed in contact with the cylinder to form thereon the toner pattern. These operations are repeated for all colors, whereby to produce a color image. The image is provisionally set without the application of pressure. The temporary substrate is juxtaposed to the rear face of a transparent substrate. The image is transferring from the temporary substrate to the transparent substrate, whereby it becomes visible from the front face of this latter. The temporary substrate is removed and the transparent substrate is bound to other components of the document. The temporary substrate undergoes a climatic conditioning by being allowed to adjust to the printing room temperature and humidity conditions prior to its entering the printing room. The printing room temperature is maintained in the interval from 17 to 25 DEG C, and the printing room humidity is maintained in the interval from humidity 25 to 65 %. |
