公开(公告)号：US5218381A

公开(公告)日：1993-06-08

申请号：US874865

申请日：1992-04-28

申请人： Ram S. Narang ,  Stephen F. Pond ,  Robert P. Altavela ,  David J. Collins ,  Robert A. Harold, Sr.

发明人： Ram S. Narang ,  Stephen F. Pond ,  Robert P. Altavela ,  David J. Collins ,  Robert A. Harold, Sr.

IPC分类号： B41J2/135 ,  B41J2/16 ,  C09D163/00

CPC分类号： B41J2/1606

摘要： 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.

公开(公告)号：US5230926A

公开(公告)日：1993-07-27

申请号：US874863

申请日：1992-04-28

申请人： Ram S. Narang ,  Stephen F. Pond ,  Robert A. Harold, Sr.

发明人： Ram S. Narang ,  Stephen F. Pond ,  Robert A. Harold, Sr.

IPC分类号： B05C1/02 ,  B05C1/00 ,  B05D1/28 ,  B41J2/16

CPC分类号： B05C1/00 ,  B05D1/28 ,  B41J2/1606 ,  Y10T29/49401

摘要： A method and apparatus for applying a coating to a front face of an ink jet print head die or print head die comprise positioning a die in a cut out in a top surface of a block such that the die extends from the top surface of the block. An applicator such as a roller or flat blade is used to apply the coating to at least an upper surface of the die as the applicator rides along the upper surface of the die. When a roller is used as the applicator, the roller has a recess corresponding to the extension of the die from the top surface of the block. The roller recess contains a piece of elastomeric material which extends to an outer portion of the roller adjacent to said roller recess. The method and apparatus facilitate transfer of a thin, uniform film of coating to an ink jet printer print head die or a completed ink jet printer print head.