Hydrophobic coating for a front face of a printhead in an ink je

Details Hydrophobic coating for a front face of a printhead in an ink je Hydrophobic coating for a front face of a printhead in an ink je

1992-04-28

1993-06-08

Hartray, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

B41J 214, B41J 205

Patent

active

052183815

ABSTRACT:
A coating for a front face of printhead in a thermal ink jet printer enables the directionality of an ink jet to be maintained for the printing lifetime of the printer. The coating controls the wetting characteristics of the front face to prevent ink accumulation on the front face. The coating comprises an epoxy adhesive resin such as EPON 1001F doped with a silicone rubber compound such as RTV 732. The coating can be provided in the form of a 24% solution of EPON 1001F in a 30:70 mixture of xylene and methyl iso-butyl ketone by weight doped with 1% by weight of RTV 732. An adhesion promoter such as an aminosilane can be included in the coating to increase bond strength between the coating and printhead front face.

REFERENCES:
patent: 4392907 (1983-07-01), Shirato et al.
patent: 4552062 (1985-11-01), You
patent: 4583690 (1986-04-01), You
patent: 5010356 (1991-04-01), Albinson
patent: 5017946 (1991-05-01), Masuda
patent: 5136310 (1992-08-01), Drews

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