Method of removing foreign particulates from pagewidth printhead
View Patent ↗A method of removing foreign particulates from an ink ejection face of a pagewidth printhead mounted on a substrate. The substrate has a film guide positioned adjacent the printhead. The method comprises the steps of: (a) flooding the face with ink and dispersing the particulates into the flooded ink; (b) positioning a polymer film in a transfer zone so as to define a cavity defined by the ink ejection face, the film guide and the polymer film; and (c) guiding the polymer film through the transfer zone. The movement of the film in the transfer zone transfers the flooded ink onto the polymer film.
1. A method of removing foreign particulates from an ink ejection face of a pagewidth printhead mounted on a substrate, said substrate having a film guide positioned adjacent said printhead, said method comprising the steps of:
(a) flooding said face with ink from said printhead and dispersing said particulates into said flooded ink;
(b) positioning a polymer film in a transfer zone so as to define a cavity defined by said ink ejection face, said film guide and said polymer film, wherein said cavity is filled with said flooded ink; and
(c) guiding said polymer film through said transfer zone, wherein movement of said polymer film in said transfer zone transfers said flooded ink onto said polymer film, and wherein said film guide encapsulates wire bonds extending from said printhead.
2. The method of claim 1 , wherein said film guide is comprised of a solid polymeric material.
3. The method of claim 1 , wherein said polymer film is guided past said face substantially parallel therewith and spaced apart therefrom.
4. The method of claim 1 , wherein said film guide is positioned adjacent a longitudinal edge of said printhead.
5. The method of claim 1 , wherein said film guide is substantially coextensive with a length of said printhead.
6. The method of claim 1 , wherein said polymer film is guided transversely past said printhead.
7. The method of claim 6 , wherein a width of said polymer film is substantially coextensive with a length of said printhead.
8. The method of claim 1 , wherein said polymer film is fed past a film cleaner after being fed past said face.
9. The method of claim 8 , wherein said film cleaner is an absorbent pad positioned remotely from said printhead.
10. The method of claim 8 , further comprising controlling an amount and/or a period of applied positive pressure.
11. The method of claim 1 , wherein said face is flooded with ink by positively pressurizing part of any ink supply system supplying ink to said printhead.
12. The method of claim 1 , wherein said foreign particulates comprise paper dust.