System and process for persistent marking of flexo plates and plates marked therewith

US11878503B2 · kind B2 · utility

Assignee

• Esko-Graphics Imaging GmbH · DE

Inventors

• Wolfgang Sievers · Kremperheide, DE
• Pascal Thomas · Hamburg, DE
• Thomas Klein · Wehr, DE

Key dates

• Filing date: Oct 7, 2020
• Grant date: Jan 23, 2024
• Expiry date: Oct 7, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/24
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Systems and processes for making a flexo plate, and plates made thereby. Non-printing indicia defined by areas of presence and absence of polymer in the plate floor are readable downstream of the washing or other non-cured-polymer-removal step but do not print in the printing step. The non-printing indicia may define a repeating pattern of alphanumeric characters, non-text graphics, or a combination thereof.