Reservoir assembly for supplying fluid to printhead

1. A fluid reservoir assembly for supplying fluid to a printhead, the assembly comprising:

a reservoir compartment in fluid communication with fluid channels for supplying the fluid to the printhead via a fluid outlet, the reservoir compartment having an air vent and a bypass fluid path interconnecting the fluid outlet and a well region within the compartment; and

a valve in the bypass fluid path for priming the reservoir compartment with fluid via the bypass fluid path.

2. The reservoir assembly of claim 1 , which includes a porous absorbent material inside the compartment to absorb fluid delivered via priming inlets in the compartment.

3. The reservoir assembly of claim 2 , which includes a filter and air barrier arranged between the fluid outlet and the compartment.

4. The reservoir assembly of claim 3 , wherein the well region of the compartment includes an annular region surrounding a raised portion on a base of the compartment about the filter and air barrier which region excludes the absorbent material.

5. The reservoir assembly of claim 2 , wherein the absorbent material is configured to absorb the fluid through suspension thereof due to capillary attraction forces.

6. The reservoir assembly of claim 5 , wherein the absorbent material is configured to provide sufficient backpressure of the absorbed fluid to prevent leakage of the fluid from the printhead.

7. The reservoir assembly of claim 1 , wherein the valve includes a manual depression button provided as a flexible portion of a bottom wall of the bypass fluid path, the button made from a rubber material and connected to the bottom wall via an annular weakened portion, an opposite internal wall of the bypass fluid path having a circular recessed region for capturing the button when depressed to close the bypass fluid path.