The HP 85 printhead is a component supply for the DesignJet 30, 90 and 130, small format graphics plotters built for photographic prints, proofs and presentation output on sheet and roll media. This platform separates the printhead from the ink cartridge, so firing hardware is replaced on its own schedule and a nozzle problem is corrected without discarding the ink supply feeding it. The printhead seats in the carriage under the window, where the latch lifts, the unit lowers into its numbered station and the latch closes over it, after which the plotter primes the head and runs a nozzle check without operator input. Because these machines are built around accurate proofing work, the printer follows installation with an automatic alignment routine that brings the new head into register with the others. Front panel messages report the state of every installed head.
Key Features:
Separated Head Architecture: The printhead is a supply distinct from the ink cartridge, so firing hardware is replaced on its own schedule without discarding ink.
Station Keyed Seating: The carriage latch lifts, the head lowers into its numbered station and the latch closes over it, setting the electrical and fluid connection.
Automatic Prime Routine: The plotter primes the new head and runs its own nozzle check after the window closes, so the first plot leaves no dropped lines behind.
Proofing Grade Alignment: An automatic alignment routine brings the new head into register with the others, which matters on proofs judged for accurate output.
Front Panel Head Status: The plotter reports the state of every installed head at the front panel, so a marginal unit is identified before a long plot is committed.