Provided is a laminated printhead arrangement for a pen nib printer. The printhead includes ink distribution layers, a layer of semiconductor ejection devices operatively supplied with ink via the ink distribution layers, and a guard layer positioned on top of the ejection device layer to protect the ejection devices. The guard layer defines printing passages via which the ejection devices eject ink. Also included is a rotary capper rotatably fixed to the guard layer about a central axis of the printhead, so that rotation of the capper covers or exposes the printing passages.