Ink Jet Print Head Which Prevents Bubbles From Collecting
AssigneeTelecom Italia S.p.A.
InventorsDuccio Spartaco Sassano, Alessandro Scardovi, Giancarlo Martina
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Abstract
Ink jet print head comprising a substrate with an upper surface and a lower surface; a plurality of actuators with ejection chambers and ink supply passages, an ink distribution slot formed in the substrate between the lower surface and the upper surface; a manifold formed in the substrate of the upper surface around the slot for the feed to the actuators; and a plurality of bubble prevention elements formed in the feed manifold. The plurality of bubble prevention elements (72) is provided only for a marginal set of actuators remote from the distribution slot.
Claims9
An ink jet print head comprising:
- a substrate;
- an ink distribution slot passing through the thickness of the substrate;
- a manifold formed in the surface of the substrate around the said slot, having at least one substantially rectilinear side;
- a plurality of actuators positioned in a row substantially parallel to the said rectilinear side of the said manifold, the said row of actuators comprising a first set of actuators adjacent to the slat and a second set of actuators not adjacent to the slot;
- characterized in that a plurality of bubble prevention elements is present in the said manifold next to the said second set of actuators only.
Dependencies are inferred from the claim text.