US 12,377,664 B2
Light trap for UV radiation for curing ink on a printing substrate and printing machine including a light trap
Bernard Beier, Ladenburg (DE); Silas Falter, Heddesbach (DE); Andreas Müller, Heidelberg (DE); and Klaus-Dieter Scharf, Königsfeld (DE)
Assigned to Heidelberger Druckmaschinen AG, Heidelberg (DE)
Filed by Heidelberger Druckmaschinen AG, Heidelberg (DE)
Filed on Oct. 25, 2023, as Appl. No. 18/493,851.
Claims priority of application No. 10 2022 133 202.0 (DE), filed on Dec. 14, 2022.
Prior Publication US 2024/0198694 A1, Jun. 20, 2024
Int. Cl. B41J 11/00 (2006.01)
CPC B41J 11/00218 (2021.01) 9 Claims
OG exemplary drawing
 
1. A light trap for ultraviolet (UV) radiation for curing ink on a printing substrate, the light trap comprising:
a shaped body having at least three shape elements succeeding one another, said shaped body having a side facing the printing substrate and embodied to have said shape elements being step elements disposed in a stepped configuration, every one of said step elements having a pair formed of a step surface and a riser, said step surface and said riser having different inclinations relative to a direction of transport, said step surface has a step length L and said riser has a step height H,
wherein the following applies: L>2H.