Printhead-transfer roller arrangement
View Patent ↗Disclosed is a page-width printhead for a print engine having a a motorized transfer roller located adjacent to the printhead. The transfer roller is also adjacent to the sheet media path of the device which uses the engine. The printhead is oriented to print directly onto the transfer roller. The engine has a second roller closely adjacent to the transfer roller and on an opposite side of the path for pressing the sheet onto the transfer roller. In some embodiments, the printhead has a surface adjacent to the transfer roller that carries capping seals on either side of the ink ejecting area. The printhead is held off of the transfer roller by a solenoid but parked against the transfer roller when not in use.
1. A page-width printhead arranged for operation in a printer comprising a motorized transfer roller for transferring ink from the printhead to a print media sheet and a solenoid for moving the printhead towards and away from the transfer roller, the printhead comprising an ink ejecting area for printing directly onto the transfer roller and at least one capping seal on the surface adjacent the ink ejection area and the transfer roller such that:
in use, the solenoid is activated to draw and maintain the printhead away from the transfer roller; and
when not in use, the printhead is parked against the transfer roller such that the seals bear against the transfer roller to prevent contact between the ink ejection area and the transfer roller.
2. The printhead of claim 1 , wherein the printhead is a drop-on-demand inkjet printhead which is stationary.
3. The printhead of claim 1 , wherein the printhead is permanent and has a replaceable ink cartridge.
4. The printhead of claim 1 , wherein the printhead is replaceable and has a replaceable ink cartridge.
5. The printhead of claim 1 , wherein the printhead incudes a refillable an ink cartridge.