Multi-fluid jetting device

1. An improved multi-fluid jetting device comprising a nozzle plate for ejecting a fluid therefrom, the nozzle plate having at least 10 or more nozzles wherein groups of three adjacent nozzles are arranged in a triad orientation in a substantially planar surface area of the nozzle plate, wherein a center-to-center separation distance between adjacent nozzles in each of said groups of three adjacent nozzles ranges from about 0.8 to about 1.7 times a droplet size elected from said nozzles, and wherein at least two adjacent nozzles in said triad orientation are coupled to two different fluid sources for fluid ejection from said adjacent nozzles substantially perpendicular to said substantially planar nozzle plate surface area.

2. The multi-fluid jetting device of claim 1 wherein the groups of three adjacent nozzles are aligned in a generally linear array.

3. The multi-fluid jetting device of claim 1 wherein the groups of three adjacent nozzles are aligned in a generally staggered array.

4. The multi-fluid jetting device of claim 1 wherein each nozzle in the group of three adjacent nozzles is coupled to a different color ink source.

5. The multi-fluid jetting device of claim 1 further comprising a barrier layer on a surface of the nozzle plate, the barrier layer containing channels and fingers arranged for inhibiting mixing between different fluids ejected from the groups of three adjacent nozzles.

6. The multi-fluid jetting device of claim 5 wherein the barrier layer further comprises at least one fluid supply channel for supplying fluid from a fluid source to at least one nozzle.

7. The multi-fluid jetting device of claim 1 further comprising a subgroup including two adjacent nozzles, one from each two different groups of nozzles each having a triad orientation wherein, said two adjacent nozzles in said subgroup are coupled to the same fluid source.

8. The multi-fluid jetting device of claim 1 wherein the jetting device comprises a device selected from the group consisting of handheld medicinal jetting devices, handheld ink jetting divides, and ink jet printers.

9. A nozzle plate for a miniature multi-fluid jetting device, the nozzle plate comprising a plurality of 10 or more nozzles having groups of three adjacent nozzles arranged in a triad orientation in a substantially planar surface area of the nozzle plate, wherein a center-to-center separation distance between adjacent nozzles in each of said groups of three adjacent nozzles ranges from about 0.8 to about 1.7 times a droplet size elected from said nozzles, and wherein at least two adjacent nozzles in said group are coupled to two different fluid sources for fluid ejection substantially perpendicular to said substantially planar nozzle plate surface area.

10. The nozzle plate of claim 9 wherein the groups of three adjacent nozzles are aligned in a generally linear array.

11. The nozzle plate of claim 9 wherein the groups of three adjacent nozzles are aligned in a generally staggered array.

12. The nozzle plate of claim 9 wherein each nozzle in the group of three adjacent nozzles is coupled to a different color ink source.

13. The nozzle plate of claim 9 further comprising a barrier layer on a surface of the nozzle plate, the barrier layer containing channels and fingers arranged for inhibiting mixing between different fluids ejected from the groups of three adjacent nozzles.

14. The nozzle plate of claim 13 wherein the barrier layer further comprises at least one fluid supply channel for supplying fluid from a fluid source to at least one nozzle.

15. The nozzle plate of claim 9 further comprising a subgroup including two adjacent nozzles, one from each two different groups of nozzles each having a triad orientation, wherein said two adjacent nozzles in said subgroup are coupled to the same fluid source.

16. The nozzle plate of claim 9 wherein the multi-fluid jetting device comprises a device selected from the group consisting of handheld medicinal jetting devices, handheld ink jetting devices, and ink jet printers.