Hydraulically tuned channel architecture

Details Hydraulically tuned channel architecture Hydraulically tuned channel architecture

1989-01-25

1989-11-21

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

G01D 1516, B41J 304

Patent

active

048825956

ABSTRACT:
The use of lumped resistive elements (28) in an ink feed channel (10) between an ink-propelling element, such as a resistor, (12) and an ink supply plenum (14) provides a means of achieving resistive decoupling and meniscus resonance control with a minimum of deleterious side effects and design compromises typical of prior art solutions. A secondary constriction (30) in the ink feed channel is defined by a width W.sub.2 sufficient to provide physical support for the resistive elements while avoiding resistance to ink refill. The printhead further comprises lead-in lobes (38) for assisting in purging any bubbles in the ink. The lobes are disposed between the projections and the plenum chamber and separate one pair of projections from a neighboring pair.

REFERENCES:
patent: 4216477 (1980-08-01), Matsuda
patent: 4312009 (1982-01-01), Lange
patent: 4317124 (1982-02-01), Shirato
patent: 4490728 (1984-12-01), Vaught
patent: 4746935 (1988-05-01), Allen

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