PRINTING SYSTEM HAVING CLOSED FLUID PATH FOR PRINTHEAD
A printing system having a fluid source, a first fluid path connecting the fluid source to a first fluid port of the printhead, a second fluid path connecting the fluid source to a second fluid port of the printhead, wherein the first and second paths are configured so that fluid from the fluid source flows between the first and second paths via the printhead.
1 . A printing system comprising:
a fluid source;
a first fluid path connecting the fluid source to a first fluid port of the printhead;
a second fluid path connecting the fluid source to a second fluid port of the printhead,
wherein the first and second paths are configured so that fluid from the fluid source flows between the first and second paths via the printhead.
2 . A system according to claim 1 , further comprising a valve connecting the first path to the printhead.
3 . A system according to claim 1 , wherein the fluid source has a first source port connected to the first path and a second source port connected to the second path.
4 . A system according to claim 3 , wherein the first and second paths, printhead and fluid source form a closed fluid flow loop in which fluid flows to and from the fluid source in either direction of the loop.
5 . A system according to claim 4 , further comprising a bi-directional pump on the first or second paths for driving said fluid flows to and from the fluid source in either direction of the loop.