公开(公告)号：US20220412878A1

公开(公告)日：2022-12-29

申请号：US17355692

申请日：2021-06-23

Applicant: Xerox Corporation

Inventor： Donald THRESH ,  Jonathan IRELAND ,  Bruce H. SMITH ,  Michael N. SOURES ,  James D. VANBORTEL

IPC: G01N21/21 ,  B41N3/08 ,  B41F7/24

Abstract: An optical light reflectance measurement system above an imaging member surface measures fountain solution surface light reflectance interference on reflective substrate portions of the imaging member surface in real-time during a printing operation. The measured light reflectance interference corresponds to a thickness of the fountain solution layer and may be used in a feedback loop to actively control fountain solution layer thickness by adjusting the volumetric feed rate of fountain solution added onto the imaging member surface during a printing operation to reach a desired uniform thickness for the printing. This fountain solution monitoring system may be fully automated.