Printing form for a rotary relief-printing method

US5884560A · kind A · utility

Assignee

• U.S. Philips Corporation · US

Inventors

• Joachim Opitz · Aachen, DE
• Ralf Raue · Aachen, DE
• Jurgen Reck · Aachen, DE
• Christoph Hars · Bielefeld, DE
• Joachim Sonnenschein · Floh-Seligenthal, DE

Key dates

• Filing date: Oct 9, 1997
• Grant date: Mar 23, 1999
• Expiry date: Oct 9, 2017

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41M1/02
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a printing form for a rotary relief-printing method, in which the printing dots transferring the printing ink constitute a half-tone screen and are superimposed by a relief structure constituted by indentations. Such printing forms are used, for example in flexographic printing methods for printing glass plates, for example display screens having a luminescent material coating. In the manufacture of these screens, the printing ink must be applied homogeneously and the ink dots appearing in the printed image must have a uniform border area. According to the invention, the printing form is to this end implemented in such a way that the relief structures are arranged homogeneously relative to the printing dots and, if the printing dots are periodically spread across the printing form, these relief structures are superimposed on the printing dots preferably with the same period. Moreover, the relief structures are arranged in such a way that the indentations do not intersect the border area of a printing dot.