Printhead maintenance station and method of operating same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B41J-002/165
B41J-002/175
출원번호
US-0195566
(2016-06-28)
등록번호
US-10137691
(2018-11-27)
발명자
/ 주소
Moscato, Anthony V.
Sabin, Jeffrey M.
출원인 / 주소
R.R. Donnelley & Sons Company
대리인 / 주소
McCracken & Gillen LLC
인용정보
피인용 횟수 :
0인용 특허 :
164
초록▼
A printhead maintenance station to cleaning a nozzle plate of a printhead and a method of operating the printhead maintenance station are disclosed. The printhead maintenance station includes a wiper bar, a wiper secured to the wiper bar, a wiper cleaning assembly, and an actuator. The wiper is stor
A printhead maintenance station to cleaning a nozzle plate of a printhead and a method of operating the printhead maintenance station are disclosed. The printhead maintenance station includes a wiper bar, a wiper secured to the wiper bar, a wiper cleaning assembly, and an actuator. The wiper is stored in the wiper cleaning assembly when not in use. The controller operates the actuator to rotate the wiper bar to move the wiper from the wiper cleaning assembly to a wiping position, and causes relative movement of the printhead maintenance station and the print unit to wipe the nozzle plate with the wiper.
대표청구항▼
1. A printhead maintenance station for cleaning a nozzle plate of a print unit that is movable parallel to a first axis and a second axis, comprising: a wiper bar having a wiper secured thereto;a wiper cleaning assembly associated with the wiper, wherein the wiper is movable from a stored position i
1. A printhead maintenance station for cleaning a nozzle plate of a print unit that is movable parallel to a first axis and a second axis, comprising: a wiper bar having a wiper secured thereto;a wiper cleaning assembly associated with the wiper, wherein the wiper is movable from a stored position in which the wiper is stored in the wiper cleaning assembly and a wiping position spaced apart from the stored position;an actuator; anda controller adapted to move a print medium, the printhead maintenance station, and the print unit parallel to the first axis;wherein the printhead maintenance station is adapted to remain stationary when the print unit moves parallel to the second axis and, when not in use, the wiper is disposed at the stored position, and wherein during a maintenance cycle, the controller is adapted to operate the actuator to move the wiper bar to move the wiper from the stored position to the wiping position, and cause relative movement of the printhead maintenance station and the print unit to wipe the nozzle plate with the wiper. 2. The printhead maintenance station of claim 1, including a trough having a drain, wherein the controller positions the printhead relative to the trough so that fluid ejected from the printhead is directed toward the drain. 3. The printhead maintenance station of claim 2, wherein the trough includes a sloping sidewall and the fluid ejected from the printhead onto the sloping sidewall flows toward the drain. 4. The printhead maintenance station of claim 3, wherein the drain is coupled to a waste collection tank and fluid ejected from the printhead is collected in the waste collection tank. 5. The printhead maintenance station of claim 1, including a further wiper bar having a further wiper secured thereto, wherein the further wiper bar is coupled to the wiper bar such that the wiper bar and the further wiper bar rotate in synchrony. 6. The printhead maintenance station of claim 5, including a belt that couples the wiper bar and the further wiper bar. 7. The printhead maintenance station of claim 5, wherein a drive shaft of the actuator is coupled to the wiper bar, a drive shaft of a further actuator is coupled to the further wiper bar, and torque from both the first actuator and the further actuator is transferred to both the wiper bar and the further wiper bar. 8. The printhead maintenance station of claim 1, wherein the wiper cleaning assembly includes a fluid intake port coupled to a source of cleaning fluid, a fluid purge port, and a wiper chamber, wherein the cleaning fluid is introduced into the wiper chamber through the fluid intake port, passes across a face of the wiper disposed in the wiper chamber, and exits the wiper chamber through the fluid purge port, thereby cleaning the face of the wiper. 9. The printhead maintenance station of claim 8, wherein the fluid intake port is further coupled to a source of gas, and the gas is introduced into the wiper chamber through the fluid intake port to dry the face of the wiper disposed in the wiper chamber. 10. The printhead maintenance station of claim 1, including a gasket that seals a nozzle plate of the printhead in a space formed by the print unit, the gasket, and the printhead maintenance station. 11. The printhead maintenance station of claim 1, including a housing and the cleaning assembly is secured to an interior bottom surface of the housing. 12. The printhead maintenance station of the claim 11, wherein the housing includes first and second opposite sidewalls, and the wiper bar is journaled at first and second opposite ends thereof in first and second bores in the first and second sidewalls, respectively. 13. A method of operating a printhead maintenance station to clean a nozzle plate of a print unit that is movable parallel to a first axis and a second axis, wherein the printhead maintenance station includes a wiper bar, a wiper secured to the wiper bar, and a wiper cleaning assembly, the wiper being movable from a stored position in which the wiper is stored in the wiper cleaning assembly and a wiping position spaced apart from the stored position, comprising: disposing the wiper at the stored position;operating an actuator to move the wiper bar to move the wiper from the stored position to the wiping position;moving a print medium, the printhead maintenance station, and the print unit parallel to the first axis;keeping the printhead maintenance station stationary when the print unit moves parallel to the second axis; andmoving the print unit relative to the printhead maintenance station, thereby wiping the nozzle plate with the wiper. 14. The method of claim 13, including the further step of positioning the printhead relative to a trough so that fluid ejected from the printhead is directed toward a drain disposed in the trough. 15. The method of claim 14, including the further steps of coupling the drain to a waste collection tank and collecting the fluid ejected from the printhead in the waste collection tank. 16. The method of claim 13, including the further steps of providing a further wiper bar having a further wiper secured thereto, coupling the further wiper bar and the wiper bar, and rotating the wiper bar and the further bar in synchrony. 17. The method of claim 16, wherein the step of coupling the further wiper bar and the wiper bar includes the step of coupling the wiper bar and the further wiper bar with a belt. 18. The method of claim 13, including the further steps of coupling a drive shaft of the actuator to the wiper bar, coupling a drive shaft of a further actuator to the further wiper bar, and transferring torque from both the first actuator and the further actuator to both the wiper bar and the further wiper bar. 19. The method of claim 13, including the further step of introducing a cleaning fluid into a chamber of the wiper cleaning assembly such that the cleaning fluid passes across a face of the wiper disposed in the chamber and exits the chamber, thereby cleaning the face of the wiper. 20. The method of claim 19, including the further step of introducing into the chamber a gas to dry the face of the wiper disposed in the wiper chamber. 21. The method of claim 20, including the further step of disposing a gasket, wherein the gasket seals a nozzle plate of the printhead in a space formed by the print unit, the gasket, and the printhead maintenance station.
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