Method and system for measuring drop-volume in ink-jet printers

Details Method and system for measuring drop-volume in ink-jet printers Method and system for measuring drop-volume in ink-jet printers

1993-10-29

1995-02-07

Pham, Hoa Q.

Optics: measuring and testing

By polarized light examination

With light attenuation

356380, 347 19, 347100, G01B 1128

Patent

active

053879767

ABSTRACT:
This invention involves to a method for measuring drop-volume in an ink-jet printhead. A series of print samples comprised of multiple drops of ink are printed on a recording media. The number of ink drops per sample is reduced for subsequent print samples to produce a series of print samples with varying amounts of ink content. The samples include a solid character to help contrast the increasingly ink depleted regions. The series is visually or optically analyzed to detect changes in optical density among the individual print samples. From these changes, the drop-volume for an ink-jet printhead can be determined. A printing system for automatically self-analyzing and self-correcting for drop-volume is also described.

REFERENCES:
patent: 4382262 (1983-05-01), Savit
patent: 4628728 (1986-12-01), Taylor et al.
patent: 4678336 (1987-07-01), Tsunoda
patent: 4829898 (1989-05-01), Wieland

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