Printhead maintenance station having sloped engagement pad
View Patent ↗A printhead maintenance station for maintaining a printhead in an operable condition is provided. The maintenance station comprises an elastically deformable pad having a contact surface for sealing engagement with an ink ejection face of the printhead. The contact surface is sloped with respect to the face. The maintenance station further comprises an engagement mechanism for reciprocally moving the pad between a first position in which the contact surface is sealingly engaged with the face, and a second position in which the contact surface is disengaged from the face. The engagement mechanism moves the pad substantially perpendicularly with respect to the face.
1. A printhead maintenance station for maintaining a printhead in an operable condition, said maintenance station comprising:
an elastically deformable pad having a contact surface for sealing engagement with an ink ejection face of said printhead, said contact surface being sloped with respect to said face; and
an engagement mechanism for moving said pad between a first position in which the contact surface is sealingly engaged with said face, and a second position in which said contact surface is disengaged from said face,
wherein said engagement mechanism moves said pad substantially perpendicularly with respect to said face, and
wherein said pad is received in a housing and said pad is slidably movable relative to said housing.
2. The maintenance station of claim 1 , wherein said pad is substantially coextensive with said printhead.
3. The maintenance station of claim 1 , wherein said contact surface is substantially uniform.
4. The maintenance station of claim 1 , wherein said pad is comprised of silicone or, polyurethane.
5. The maintenance station of claim 1 , wherein said contact surface is flat.
6. The maintenance station of claim 5 , wherein said pad is wedge-shaped.
7. The maintenance station of claim 1 , wherein a peel zone between said contact surface and said ink ejection face advances and retreats transversely across said face during engagement and disengagement.
8. The maintenance station of claim 1 , wherein said pad is biased towards said first position.
9. The maintenance station of claim 1 , wherein said pad extends through a slit in said housing in said first position and said pad is retracted into said housing in said second position.
10. The maintenance station of claim 1 , wherein said pad is mounted on a support arm, said arm having a lug at each end for engagement with said engagement mechanism, wherein said lugs extend through complementary slots in side walls of said housing, thereby allowing sliding movement of said support arm.
11. The maintenance station of claim 1 , wherein a peeling disengagement of said contact surface draws ink from said printhead towards a longitudinal edge portion of said contact surface and/or said face.
12. The maintenance station of claim 1 , further comprising an ink removal system for removing ink from an edge portion of said contact surface and/or said face.
13. The maintenance station of claim 12 , wherein said ink removal system comprises a wicking element or wicking channel positioned adjacent an edge of said printhead.
14. The maintenance station of claim 13 , wherein said wicking element or wicking channel is positioned to receive ink from said edge portion of said contact surface when said contact surface is being disengaged from said face.
15. The maintenance station of claim 13 , wherein said ink removal system further comprises an ink collector for receiving ink wicked through said wicking element or wicking channel.
16. The maintenance station of claim 1 , wherein said printhead is an inkjet printhead.
17. The maintenance station of claim 1 , wherein said printhead is a pagewidth printhead.