Servicing a drum at a printer
AssigneeHewlett-Packard Development Company, L.P.
InventorsZiv Seemann, Erez Heldy, Dror Halawa
Life of this patent
Estimating the term…
Abstract
In an example of the disclosure, service rotation of a drum along a longitudinal axis of the drum is caused. The service rotation is to apply a centrifugal force upon a liquid held by the drum. The centrifugal force pushes gas bubbles in the drum away from a curved surface of the drum and towards the longitudinal drum axis. The gas bubbles evacuate from the drum via an outlet tube positioned adjacent to the longitudinal drum axis. A production rotation of the drum is caused after the service rotation.
Claims15
A method for servicing a drum at a printer, comprising:
- causing a service rotation of a drum along a longitudinal axis of the drum, the service rotation to apply a centrifugal force upon a liquid held by the drum,
- wherein the centrifugal force pushes gas bubbles in the drum away from a curved surface of the drum and towards the longitudinal drum axis;
- wherein the gas bubbles evacuate from the drum via an outlet tube positioned adjacent to the longitudinal drum axis;
- and
- causing a production rotation of the drum after the service rotation.
A system for servicing a drum at a printer, comprising:
- a drum;
- an actuator movably connected to the drum;
- a service rotation engine, to cause a service rotation wherein the actuator rotates the drum around a longitudinal axis of the drum, wherein the service rotation is to cause a centrifugal force to be imposed upon a liquid contained within the drum, the centrifugal force for pushing push gas bubbles away from a curved surface of the drum and towards the longitudinal drum axis;
- a production rotation engine, to cause a production rotation wherein the actuator rotates the drum to support a substrate during application of a print agent to the substrate;
- and
- an outlet tube positioned adjacent to a circular plane surface of the drum and aligned with the longitudinal drum axis, the outlet tube to allow the gas bubbles to escape the drum during the service rotation.
A printing system, comprising:
- a print application cylinder positioned to make a first transfer of a developed image to an intermediate transfer member (“ITM”);
- the ITM positioned to, following the first transfer, make a second transfer of the developed image to a substrate supported by an impression drum;
- the impression drum;
- an actuator to cause rotation of the impression drum around a longitudinal drum axis;
- a service system for the impression drum, including
- an inlet tube, positioned adjacent to the longitudinal drum axis;
- a service rotation engine, to cause an insertion of water into the drum via an inlet tube, and to cause an actuator to effect a service rotation of the impression drum that is to cause a centrifugal force to be imposed upon the water;
- an outlet tube to allow air bubbles to escape the drum during the imposition of the centrifugal force;
- and
- a production rotation engine to cause a production rotation of the drum after the service rotation.
Dependencies are inferred from the claim text.