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DROP QUALITY CONTROL SYSTEM FOR JET PRINTING DROP QUALITY CONTROL SYSTEM FOR JET PRINTING
DROP QUALITY CONTROL SYSTEM FOR JET PRINTING DROP QUALITY CONTROL SYSTEM FOR JET PRINTING
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机译：射流印刷的液滴质量控制系统射流印刷的液滴质量控制系统
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摘要
A method and apparatus are disclosed for controlling the flight time and composition of a marking fluid used in a continuous jet marking system. A three-way valve permits switching between fresh ink and system ink supplies. Periodically a comparison of pressure required to maintain a constant drop flight time is made by a controller. Because both supplies are in the same operating environment any difference in pressure is due to a change in system ink viscosity. Make up solvent is added, if necessary, via a pump to restore viscosity to desired values.
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