Surface ripple wave suppression by anti-reflection in apertured

Details Surface ripple wave suppression by anti-reflection in apertured Surface ripple wave suppression by anti-reflection in apertured

1991-12-27

1995-09-12

Wong, Peter S.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 47, B41J 2135, B41J 214

Patent

active

054501075

ABSTRACT:
In response to the foregoing need, the cap structures that are provided by this invention for controlling the free ink surface levels of acoustic ink printers are characterized by having aperture configurations that are more or less equally subdivided into "reflectively balanced" sectors that radially differ from each other by 1/4 of the dominant wavelength of the surface ripple waves that are generated by the droplet ejection process. The 1/4 wavelength difference in the radii of the two generally equal reflectively balanced fractional parts of these apertures causes the dominant frequency components of the retroreflected ripple waves to destructively interfere with each other in the critical central regions of the apertures.

REFERENCES:
patent: 4308547 (1981-12-01), Lovelady et al.
patent: 4403234 (1983-09-01), Miura et al.
patent: 4751530 (1988-06-01), Elrod et al.
patent: 4962391 (1990-10-01), Kitahara et al.
patent: 5028937 (1991-07-01), Khuri-Yakub et al.
patent: 5041849 (1991-08-01), Quate et al.

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