Printhead assembly having an elongate ink delivery extrusion with a fitted end cap

1. A printhead assembly for an ink jet printer, the printhead assembly comprising

an ink supply assembly having an elongate extrusion defining a number of distribution channels for distributing ink to a printhead; and

an end cap operatively fitted to said extrusion such that ink is distributed to the extrusion via the end cap, the end cap comprising:

an upper plate and a lower plate hingedly linked by means of a spine; and

a plurality of plugs defined on the spine to plug said distribution channels when the cap is fitted to the extrusion, the upper plate defining apertures for operatively arranging said distribution channels in fluid communication with ink delivery hoses.

2. The printhead assembly of claim 1 , wherein the end cap includes connectors for receiving the ink delivery hoses in fluid communication through said apertures.

3. The printhead assembly of claim 1 , wherein the end cap includes a sealing pin arrangement having perforated, hollow metal pins with an elastomeric collar fitted to the connectors.

4. The printhead assembly of claim 1 , wherein the extrusion defines a number of apertures via which ink from the ink delivery hoses is deliverable to the printhead assembly.

5. The printhead assembly of claim 1 , wherein the cap includes snap engagement tabs for clamping onto the extrusion.

6. The printhead assembly of claim 1 , wherein the ink supply assembly includes ink reservoirs with an air pump and filtration means.