Ink Supply

More details can be found via the Esp@cenet website, please click here to use the patent number search facility, and enter the reference number detailed in the table below.

Patent Number

Description

EP1796907

Method and apparatus for supplying fluid to a print head using the through flow principle where the pressure of fluid entering and exiting the printhead is controlled by respective pressure controllers, preferably a transducer and control system or a weir. The pressure controllers can be integrated together and mounted on or close to the print head or mounted remote to the print head. The supply system preferably forms a closed loop including a remote reservoir, and the entire system can be arranged such that the overall free surface of fluid is exposed on average to a negative gauge pressure so enabling fluid degassing.

EP1425177

An ink supply system for a print head having the pressure at the nozzle controlled at a remote point, positioned in parallel with the print head, in the fluid circuit.

EP1124691

A print head having a drive circuit for supplying the electrical signals to the actuator and a conduit for supplying droplet fluid to the actuator. The drive circuit mounted in thermal contact with the conduit so as to transfer heat generated in the drive circuit to the droplet fluid to aid efficent thermal management of the print head.

EP1140513 and EP1393907

A print head with a fluid inlet manifold and a fluid outlet manifold and means for generating a fluid flow into the inlet manifold, through each chamber in the array, pat the ejection nozzle and into the outlet manifold. The fluid flow through each chamber being sufficient to prevent foreign bodies in the fluid from lodging in the orifice. The resistance to flow of one of the inlet and outlet manifolds is chosen such that the pressure at a fluid inlet to any chamber in the array varies between any two chambers by an amount less than that which would give rise to significant differences in droplet ejection properties between these two chambers.