Patent · US Active

Method and apparatus for exposure of flexographic printing plates using light emitting diode (LED) radiation sources

US12055856B2 · kind B2 · utility

0Cited by

52References

20Claims

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	May 11, 2022
Grant date	Aug 6, 2024
Priority date	—
Expiry date	May 11, 2042

Classification

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

Abstract

Apparatus, method, and system for exposing a photosensitive printing plate to radiation, including a plurality of LED point sources configured to emit UV light. The plurality of LED point sources in at least one of a front side set or back side set are controllable in subsets smaller than an entirety of the collective irradiation field corresponding to the respective set. A holder receives the printing plate in a stationary position to receive incident radiation and a controller is configured to control the plurality of LED source subsets. A first LED point source subset is configured to be controlled at a first intensity differing by a factor relative to a second intensity of a second LED point source subset to give the radiation emitted by the respective set an intended degree of homogeneity.

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