| 摘要 |
A purge/clean system and an associated method for A fluid jet apparatus , such as an ink jet printing system, having a fluid chamber including a chamb er wall having an exterior surface and at least one orifice through which fluid is ejected from the fluid chamber toward a substrate involves a cavity defined adjacent the exterior surface of the chamber wall into which fluid which is, expelled from the at least on e orifice during a purging or cleaning operation is permitted to flow and a vacuum pum p for withdrawing fluid which is contained within the cavity. The cavity can be provided by a plurality of plate arranged in an assembled, or stacked, relationship agains t the exterior surface of the chamber wall and, with the aid of a fan or compressor, can be used to create a zone of above -atmospheric pressure adjacent the exterior surface o f the printer head. With the zone of above-atmospheric pressure created within the cavity, any leakage of air from the region into the atmosphere effects a flow of air out of the region and thereby helps to maintain the at least one orifice in a relatively clean condition. |
