Showing papers on "Lithography published in 1970"

Method for electronic lithography

Abstract: A method and apparatus for printing an image in scanned electronic form on an ink receiving surface using ordinary printer''s ink. The method and apparatus employ quasilithographic techniques and equipment, but unlike conventional lithography, the method does not require the preparation, prior to the printing process, of a lithographic plate containing in permanent form the image to be printed. The scanned electronic image is used to form a fountain solution image on a lithographically blank plate by the selective deposition and/or removal of the fountain solution from the plate. Lithographic ink is applied to the fountain solution imaged plate and then transferred to an ink receiving surface, such as paper or an offset blanket. Thereafter, the lithographically blank plate is cleaned and ready for the formation of the same or a different fountain solution image.

Method of and apparatus for controlling lithographic printing

Abstract: In a printing machine, means are provided to independently control the temperature of the wetting agent and also the temperature of the printing ink at least at two spaced locations in the inking unit.