Method and apparatus for controlling the formation and shape of

Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element

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346 75, 346140R, G01D 1513

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040471837

ABSTRACT:
Method and apparatus is described for controlling the formation and shape droplets in an ink jet stream. The continuous portion of the stream is illuminated with a radiant energy source such as a laser. The surface wave profile produced by illuminating the stream is sensed to provide the fundamental and harmonic frequency components thereof. A perturbation drive signal, the amplitude and relative phase of which is a function of the sensed frequency components, is provided for controlling the formation and shape of the droplets.

REFERENCES:
patent: 3769627 (1973-10-01), Stone
patent: 3907429 (1975-09-01), Kuhn et al.
Chan; W. H. et al., Feedback for Synchronized Pressure Jet Using Optical Sensor, IBM Tech. Disc. Bulletin, May 1974, vol. 16, No. 12, pp. 3877-3878.

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