Method of removing flooded ink from a printhead using a rotating roller
View Patent ↗A method of removing particulates from an ink ejection face of a printhead is provided. The method comprises the steps of: (a) flooding the face with ink from the printhead, thereby dispersing the particulates into the flooded ink; and (b) transferring the flooded ink, including the particulates, onto a transfer surface moving past the face. Damage to the face is avoided since the transfer surface does not contact the face.
1. A method of removing flooded ink from an ink ejection face of a printhead, said method comprising the steps of:
transferring said ink onto a transfer surface moving past said face, wherein said transfer surface is an outer surface of a first transfer roller which does not contact said face; and
removing ink from transfer surface using an ink removal system, wherein said ink removal system comprises a second transfer roller engaged with said first transfer roller.
2. The method of claim 1 , wherein said sheet contacts said flooded ink when moving past said face.
3. The method of claim 1 , wherein said transfer surface is less than 1 mm from said face when moving past said face.
4. The method of claim 1 , wherein a sealing member is positioned adjacent said printhead, such that at least part of said transfer surface, said face and said sealing member define a cavity when said transfer surface moves past said face.
5. The method of claim 4 , wherein said transfer surface forms a fluidic seal with said sealing member.
6. The method of claim 1 , wherein said transfer surface is an outer surface of a first transfer roller.
7. The method of claim 6 , wherein said transfer surface is moved past said face by rotating said roller.
8. The method of claim 6 , wherein said roller is substantially coextensive with said printhead.
9. The method of claim 1 , wherein said face is flooded with ink by positively pressurizing an ink reservoir or ink conduit supplying ink to said printhead.
10. The method of claim 9 , wherein an amount and/or a period of pressure applied to said ink reservoir or ink conduit is controlled.
11. The method of claim 9 , wherein an ink conduit between said ink reservoir and said printhead comprises a valve for controlling an amount of ink flooded onto said face.
12. The method of claim 1 , wherein said second transfer roller has a wetting surface for receiving ink from said transfer surface.
13. The method of claim 12 , wherein said second transfer roller is a metal roller.
14. The method of claim 1 , wherein said second transfer roller is positioned distal from said printhead.
15. The method of claim 1 , wherein a cleaning pad is in contact with said second transfer roller.
16. The method of claim 15 , wherein said second transfer roller and said cleaning pad are substantially coextensive with said first transfer roller.