Incremental printing of symbolic information – Ink jet – Controller
Patent
1993-07-30
1996-02-27
Fuller, Benjamin R.
Incremental printing of symbolic information
Ink jet
Controller
347 15, 347 68, 347 70, B41J 2045, G01D 1516
Patent
active
054952700
ABSTRACT:
An ink jet (10) apparatus and method provides high-resolution gray scale printing by providing multiple PZT drive waveforms (100, 110, 120), each having a spectral energy distribution that excites a different modal resonance of ink in an ink jet print head orifice (14). By selecting the particular drive waveform that concentrates spectral energy at frequencies associated with a desired oscillation mode and that suppresses energy at the other oscillation modes, an ink drop (170, 180, 190) is ejected that has a diameter proportional to a center excursion size of the selected meniscus surface oscillation mode. The center excursion size of high order oscillation modes is substantially smaller than the orifice diameter, thereby causing ejection of ink drops smaller than the orifice diameter. Conventional orifice manufacturing techniques may be used because a specific orifice diameter is not required. Jetting reliability and contaminant susceptibility are, thereby, improved by eliminating the need for an unconventionally small orifice. Changing a selected PZT drive waveform amplitude changes drop ejection velocity without changing drop volume. This invention, therefore, provides for selection of ejected ink drop volumes having substantially the same ejection velocity over a wide range of ejection repetition rates.
REFERENCES:
patent: 3946398 (1976-03-01), Kyser et al.
patent: 4393384 (1983-07-01), Kyser
patent: 4503444 (1985-03-01), Tacklind
patent: 4513299 (1985-04-01), Lee et al.
patent: 4563689 (1986-01-01), Murakami et al.
patent: 4639735 (1987-01-01), Yamamoto et al.
patent: 4730197 (1988-03-01), Raman et al.
patent: 4746935 (1988-05-01), Allen
patent: 5124716 (1992-06-01), Roy et al.
patent: 5170177 (1992-12-01), Stanley et al.
patent: 5381162 (1995-01-01), Roy et al.
"Spot-Size Modulation in Drop-On-Demand Ink-Jet Technology," E. P. Hofer, Society for Information Display Digest, 1985, pp. 321, 322.
"Physical Limitations on High Performance Piezo-Electric Pusher Technology", Stuart Howkins, SPIE vol. 1912 Color Hard Copy and Graphic Arts II (1993), pp. 142-152.
Adams Ronald L.
Burr Ronald F.
Le Hue P.
Mutton Jon C.
Tence David A.
D'Alessandro Ralph
Fuller Benjamin R.
Gordon Raquel Yvette
Preiss Richard B.
Tektronix Inc.
LandOfFree
Method and apparatus for producing dot size modulated ink jet pr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for producing dot size modulated ink jet pr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for producing dot size modulated ink jet pr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1682292