Abstract: An inkjet printhead includes: a manifold having an ink supply channel and a lower surface with a longitudinal ink cavity defined therein; a shim attached to the lower surface so as to bridge across the longitudinal ink cavity, the shim having a plurality of shim apertures for receiving ink from the longitudinal ink cavity; and a plurality of printhead chips attached to the shim. A plurality of through-holes are defined in the manifold to provide fluid communication between the ink supply channel and the longitudinal ink cavity. Each through-hole has a first portion with a first end defined in the roof and a second portion extending through a sidewall of the ink cavity such that the shim seals an end of the second portion.

Abstract: An inkjet printhead includes: a manifold having a plurality of ink outlets defined in a manifold surface; a shim adhesively bonded to the manifold surface, the shim having apertures aligned with the ink outlets; a first row of printhead chips adhesively bonded to the shim; and a second row of printhead chips adhesively bonded to the shim. The shim is a one-part common shim for mounting all printhead chips of the first and second row.

Abstract: An inkjet printhead includes: a rigid elongate manifold having one or more ink supply channels extending along its length, each ink supply channel having a base defining a plurality of ink outlets and a roof comprising an elongate flexible film; and a plurality of printhead chips mounted to the manifold, each printhead chip receiving ink from one or more of the ink outlets The flexible film includes a plurality of operatively independent bellows positioned along a length of one or more ink supply channels.

Abstract: An ink delivery system for an inkjet printer includes: a positive ink line; a negative ink line; and one or more print modules interconnected between the positive ink line and the negative ink line. Each print module includes: an inlet port; an outlet port; a printhead interconnected between the inlet port and the outlet port; a control valve positioned at the inlet port 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.