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1. (WO2017190934) INK DELIVERY SYSTEM FOR SUPPLYING INK TO MULTIPLE PRINTHEADS AT CONSTANT PRESSURE

Pub. No.:    WO/2017/190934    International Application No.:    PCT/EP2017/058893
Publication Date: Fri Nov 10 00:59:59 CET 2017 International Filing Date: Thu Apr 13 01:59:59 CEST 2017
IPC: B41J 2/175
Applicants: MEMJET TECHNOLOGY LIMITED
Inventors: THELANDER, Jason
PROFACA, Mark
WHEATLEY, Stuart
MEYER, Craig
Title: INK DELIVERY SYSTEM FOR SUPPLYING INK TO MULTIPLE PRINTHEADS AT CONSTANT PRESSURE
Abstract:
An ink delivery system for an inkjet printer includes: a positive ink line having a controlled positive ink pressure; a negative ink line having a controlled negative ink pressure; one or more print modules interconnected between the positive ink line and the negative ink line via respective inlet and outlet lines. Each print module includes: a printhead; a control valve positioned at an inlet port of the print module for controlling an ink pressure in the printhead; an ink pressure sensor for sensing an ink pressure in the print module; and a controller for receiving feedback from the pressure sensor and controlling the control valve. During printing, the ink pressure sensor, the controller and the control valve cooperate to control a backpressure in the printhead within a predetermined backpressure range.