G - Physics – 05 – D
Patent
G - Physics
05
D
101/96.0201
G05D 16/08 (2006.01) B41J 2/17 (2006.01)
Patent
CA 1266201
-24- APPARATUS AND METHOD FOR DYNAMICALLY VARYING THE PRESSURE OF WRITING FLUID SUPPLIED TO AN INK JET PRINTER HEAD ABSTRACT OF THE DISCLOSURE A hydraulic circuit and related method are provided for dynamically varying the pressure of ink supplied to an ink jet printer head to obtain consistent volume ejected ink drops despite differences in the time elapsing between successive drops. A dot rate command signal related to an actuation frequency and corresponding to the pressure of ink at the head necessary for producing an ejected drop having a desired volume is compared with the ink pressure at the head to produce a pressure control signal for varying the pressure of the ink in a variable volume fluid chamber to deliver ink to the head at the desired pressure. The pressure control signal is one chosen by experiment as that required to produce the desired ink drop volume for the specific ink supply and ink jet printer head employed.
527537
Blake Dale G.
Rich Leonard G.
Metromedia Company
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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