Patent ID: 8807725
Filing Date: 2014-08-19
Classification: B41J,Y10T

Abstract:
1. An ink supply system for an inkjet printer, the system comprising: an inkjet printhead; an ink container fluidically interconnected with the printhead via a closed fluid flow loop, said ink container having a vent open to atmosphere, said closed loop comprising a first path between the ink container and a first longitudinal end of the printhead and a second path between the ink container and a second longitudinal end of the printhead; a vent line connected to said first path, said vent line having an air inlet; a valve configured for: a pump on said second path; and a controller configured to operate said pump and said valve in each of the following modes: prime the printhead by: pumping ink from the ink container when the vent line is closed and the first path is open; de-prime the printhead by pumping air into the closed loop when the vent line is open and the first path is closed; and print from the printhead by shutting off the pump when the vent line is closed and the first path is open.