Claims
- 1. A liquid jet recording apparatus for jetting ink droplets to a recording medium and forming a dot image on said recording medium, said liquid jet recording apparatus comprising:ink jetting orifices from which ink droplets are jetted; ink paths connected to said ink jetting orifices, said ink paths being filled with the ink; heater elements provided in said ink paths, pulse signals having a frequency falling within a range between 8 kHz and 40 kHz being supplied to said heater elements so that bubbles are generated in said ink paths and ink droplets are jetted from said ink jetting orifices by forces based on expansion of the bubbles, wherein a ratio of energy required for jetting ink droplets to an area of said ink jetting orifices is within a range of 0.3 J/cm2 to 3 J/cm2, wherein an area of each of said ink jetting orifices is equal to or less than 500 μm2, each of the ink droplets flying to said recording medium has a slender column shape in which the length falls within a range between values three times and ten times the diameter, and wherein a flying velocity of each of the ink droplets is in a range of 5.2 m/second to 11.9 m/second, the defined ratio of energy required for jetting ink droplets to the area of said ink jetting orifices and the flying velocity providing optimum ink jetting so that each of the ink droplets flying to the recording medium has the slender column shape.
- 2. A liquid jet recording method for jetting ink droplets to a recording medium and forming a dot image on said recording medium, said liquid jet recording method comprising:providing an ink jetting apparatus including ink jetting orifices from which ink droplets are jetted, ink paths connected to said ink jetting orifices, said ink paths being filled with the ink and heater elements provided in said ink paths; and generating and supplying pulse signals having a frequency falling within a range between 8 kHz and 40 kHz to said heater elements so that bubbles are generated in said ink paths and ink droplets are jetted from said ink jetting orifices by forces based on expansion of the bubbles, wherein a ratio of energy required for jetting ink droplets to an area of said ink jetting orifices is within a range of 0.3 J/cm2 to 3 J/cm2, wherein an area of each of said ink jetting orifices is equal to or less 500 μm2, each of the ink droplets flying to said recording medium has a slender column shape in which the length falls within a range between values three times and ten times the diameter, and wherein a flying velocity of each of the ink droplets is in a range of 5.2 m/second to 11.9 m/second, the defined ratio of energy required for jetting ink droplets to the area of said ink jetting orifices and the flying velocity providing optimum ink jetting so that each of the ink droplets flying to the recording medium has the slender column shape.
Priority Claims (3)
Number |
Date |
Country |
Kind |
4-259521 |
Sep 1992 |
JP |
|
5-28019 |
Feb 1993 |
JP |
|
5-106706 |
May 1993 |
JP |
|
Parent Case Info
This is a continuation of application Ser. No. 08/738,788 filed Oct. 29, 1996 U.S. Pat. No. 5,877,786, which is a divisional of application Ser. No. 08/127,951 filed Sep. 27, 1993 U.S. Pat. No. 5,610,637.
US Referenced Citations (24)
Foreign Referenced Citations (11)
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0259541 |
Mar 1988 |
EP |
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EP |
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JP |
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0550612 |
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JP |
Non-Patent Literature Citations (1)
Entry |
Allen et al; Thermodynamics and Hydrodynamics of Thermal Ink Jets; Hewlett-Packard Journal, May 1985, pp. 21-27. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
08/738788 |
Oct 1996 |
US |
Child |
09/030274 |
|
US |