Method of maintaining a printhead using a maintenance roller and ink removal system mounted on a chassis
View Patent ↗A method of maintaining a printhead in an operable condition is provided. The method comprises the steps of: (i) providing a chassis having mounted thereon: a maintenance roller having an elastically deformable contact surface and an ink removal system for removing ink from the maintenance roller; (ii) moving the chassis towards the printhead such that the contact surface is sealingly engaged with an ink ejection face thereof; (iii) moving the chassis away from said printhead such that the contact surface is disengaged from the face; and (iv) rotating the maintenance roller such that ink is removed from the contact surface by the ink removal system.
1. A method of maintaining a stationary pagewidth inikjet printhead in an operable condition and/or remediating the stationary pagewidth inikjet printhead to an operable condition, said method comprising the steps of:
(i) providing a chassis having mounted thereon:
a maintenance roller having an elastically-deformable non-absorbent contact surface for sealing engagement with an ink ejection face of said printhead; and
an ink removal system for removing ink from said maintenance roller, said ink removal system comprising a transfer roller engaged with said maintenance roller;
(ii) moving said chassis towards said stationary pagewidth inkjet printhead such that said contact surface is sealingly engaged with said face;
(iii) moving said chassis away from said stationary pagewidth inkjet printhead such that said contact surface is disengaged from said face;
(iv) rotating said maintenance roller such that said transfer roller receives ink from said maintenance roller; and
(v) optionally repeating steps (ii) to (iv);
wherein said chassis is moved substantially perpendicularly with respect to said face in steps (ii) and (iii), and wherein said maintenance roller does not rotate when sealingly engaged with said printhead.
2. The method of claim 1 , wherein said maintenance roller is substantially coextensive with said printhead.
3. The method of claim 1 , wherein said contact surface is substantially uniform.
4. The method of claim 1 , wherein said maintenance roller comprises a rigid core having an elastically deformable shell, said contact surface being an outer surface of said shell.
5. The method of claim 4 , wherein said shell is comprised of silicone, polyurethane, Neoprene®, Santoprene® or Kraton®.
6. The method of claim 1 , wherein said maintenance roller is offset from said printhead.
7. The method of claim 1 , wherein a peel zone between said contact surface and said ink ejection face advances transversely across said face during engagement in step (ii) and retreats transversely across said face during disengagement in step (iii).
8. The method of claim 1 , wherein said disengagement in step (iii) draws ink from said printhead onto said contact surface.
9. The method of claim 1 , wherein said transfer roller has a wetting surface for receiving ink from said contact surface.
10. The method of claim 9 , wherein said transfer roller is a metal roller.
11. The method of claim 1 , wherein said transfer roller is positioned distal from said printhead.
12. The method of claim 1 , wherein said ink removal system further comprises a cleaning pad in contact with said transfer roller, said cleaning pad receiving ink from said transfer roller when said transfer roller is rotated.
13. The method of claim 12 , wherein said transfer roller and said cleaning pad are substantially coextensive with said maintenance roller.