Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1990-12-26
1993-07-20
Fuller, Benjamin R.
Recorders
Markers and/or driving means therefor
With ink supply to marker
B41J 2135
Patent
active
052297934
ABSTRACT:
This invention is an acoustic ink printer. It has a pool of ink (33) with a free surface (36). Underneath the ink is a print head (10) which has droplet ejectors (14) for irradiating the free surface (36) of the pool of ink (33) with focused acoustic radiation (44). Over the free surface (36) of the pool of ink (33) is a membrane (16), with one or more apertures (20) aligned with the droplet ejectors (14), in intimate contact with the free surface (36) of the pool of ink (33). The apertures 20 are substantially larger than the waist diameter (46) of the focused acoustic radiation (44). An external pressure source (50) maintains the meniscus (48) of the pool of ink (33) substantially in the focal plane (52) of the focused acoustic radiation (44) during operation of the droplet ejectors (14). A piezoelectric crystal (24) is in intimate contact with the pool of ink (33). An electrical signal source (32) energizes the piezoelectric crystal (24) in order to apply a pressure signal (54) on demand to the pool of ink (33) during operation of the droplet ejectors (14). The different pressure signals (54) resulting from application of different electrical signals (29) to the piezoelectric crystal (24) can be utilized to eject individual droplets (38) of ink (33) from the free surface (34) of the ink (33) on demand, or to effect finer control over the free surface (34) of the ink (33) than is possible with the external pressure source (50) by itself.
REFERENCES:
patent: 4293865 (1981-10-01), Jinnai et al.
patent: 4308547 (1981-12-01), Lovelady et al.
patent: 4449134 (1984-05-01), Skinner, Jr.
patent: 4719476 (1988-01-01), Elrod et al.
patent: 4751530 (1988-06-01), Elrod et al.
patent: 4973980 (1990-11-01), Howkins et al.
patent: 5028937 (1991-07-01), Khuri-Yakub et al.
Naoki Morita, "Characteristics on Travelling Wave Drop Generator for Multi-Nozzle Continuous Ink Jet" 1989.
Naoki Morita, "Multinozzle Drop Generator for Continuous Ink Jet Printing", Part 2, vol. 7, Nov. 7, 1989.
Hadimioglu Babur B.
Khuri-Yakub Butrus T.
Quate Calvin F.
Fuller Benjamin R.
Le N.
Xerox Corporation
LandOfFree
Liquid surface control with an applied pressure signal in acoust does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid surface control with an applied pressure signal in acoust, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid surface control with an applied pressure signal in acoust will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1764043