Patent · US Active

Process and apparatus for controlled exposure of flexographic printing plates and adjusting the floor thereof

US10732507B2 · kind B2 · utility

3Cited by

47References

27Claims

0Family size

Assignee

Esko-Graphics Imaging GmbH · DE

Inventors

Jörg Wolterink · Oelixdorf, DE
Thomas Hänsel · Rockford, US
Wolfgang Sievers · Kremperheide, DE

Key dates

Filing date	Mar 20, 2018
Grant date	Aug 4, 2020
Priority date	—
Expiry date	Mar 20, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH05K3/0082
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A method and apparatus to expose photosensitive printing plates with a predetermined radiation density from the main side (top) and a predetermined radiation density from the back side (bottom). The method comprises executing the main exposure with a time delay after the back exposure. The time delay between back exposure and main exposure is optimized to create smaller stable single dot elements on the photosensitive printing plate after processing and smaller single element dot sizes printed on the print substrate. The plate floor may be adjusted by performing a back-side-only exposure prior to executing the combined back and main exposure with the time delay.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.