Patent ID: 6926391
Filing Date: 2005-08-09
Classification: B41J

Abstract:
1. A micro fluidic module for guiding a working fluid supplied by a fluid reservoir, comprising: a micro fluid channel barrier, composed of: a firing chamber formed in said micro fluid channel barrier for storing working fluid to be ejected; a fluid inlet channel connecting exterior of said micro fluid channel barrier to interior of said firing chamber and having a wider section at exterior side of said barrier and a narrower section at interior of said firing chamber; a fluid outlet channel separate from said fluid inlet channel connecting said interior of said firing chamber to exterior of said micro fluid channel barrier and having a wider section at interior of said firing chamber and a narrower section at exterior side of said barrier; and an actuator, mounted in interior of said firing chamber, for providing pressure to said working fluid; therefore, a part of said working fluid pressurized by said actuator is expelled through said outlet channel from said firing chamber to exterior of said channel barrier; and other working fluid supplied by said fluid reservoir is refilled through said inlet channel from exterior of said channel barrier to said firing chamber.