and can be formed as burst holes they serve to key the onsert molding 47 to the metal after the molding 47 is applied the blank is inserted into a press tool where additional bending operations and forming of integral springs 48 takes place the elastomeric onsert molding 47 has a series of rectangular recesses or air chambers 56 these create chambers when uncapped the chambers 56 are positioned over the air inlet and exhaust holes 30 of the upper micro molding 28 in the u201c memjet u201d printhead module 11 these allow the air to flow from one inlet to the next outlet when the capping device 12 is moved forward to the u201c home u201d capped position as depicted in fig1 these airways 32 are sealed off with a blank section of the onsert molding 47 cutting off airflow to the u201c memjet u201d chip 23 this prevents the filtered air from drying out and therefore blocking the delicate u201c memjet u201d nozzles another function of the onsert molding 47 is to cover and clamp against the nozzle guard 24 on the u201c memjet u201d chip 23 this protects against drying out but primarily keeps foreign particles such as paper dust from entering the chip and damaging the nozzles the chip is only exposed during a printing operation when filtered air is also exiting along with the ink drops through the nozzle guard 24 this positive air pressure repels foreign particles during the printing process and the capping device protects the chip in times of inactivity the integral springs.