The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 1992
Filed:
Jul. 17, 1989
Man Roland Druckmaschinen AG, Offenbach-am-Main, DE;
Abstract
An offset litho or other surface printing press has a printing image carrier with image areas defined by water repelling and water-wettable properties. In order to make possible a reconfiguration of the image directly in the press the printing image carrier is in the form of an electrically conducting substrate, as for example nickel, M which is coated with a polymer to define such areas. The deposition of the polymer is controlled electrochemically with the plate cylinder acting as one electrode and the opposite electrode being in the form of a roller able to rotate in an electrolyte container. One of the two electrodes is in the form of matrix and is activated in a manner in conformity with a pattern of halftone dots corresponding to the desired image. Dependent on whether the polymer is hydrophobic or hydrophilic, the ink accepting areas or either the coated or non-coated parts of the substrate.