Claims
- 1. A liquid jet head for letting liquid droplets to a medium and forming a dot image on said medium, said liquid jet head comprising:liquid jetting orifices from which liquid droplets are jetted: channels connected to said jet orifices, said channels being filled with liquid; and energy applying members, provided in said channels, for applying energy to the liquid in said channels on demand so that liquid droplets are jetted from said liquid jetting orifices wherein a cross sectional area of each of said liquid jetting orifices is within a range from 200 μm2 to 500 μm2, and wherein said energy applying members apply the energy to the liquid so that the liquid droplets, each of which has a flying velocity equal to or greater than 5.2 m/second, are jetted at a frequency which is within a range from 10 kHz to 40 kHz.
- 2. The liquid jet head as claimed in claim 1, wherein each of said energy applying members has a heater element formed in a corresponding one of said channels by means of a photolithography method, said heater element heating the liquid so that bubbles causing the liquid droplets to be jetted are generated in the liquid.
- 3. The liquid jet head as claimed in claim 2, wherein a length of each liquid droplet is at least three times as great as a diameter thereof.
- 4. The liquid jet head as claimed in claim 1, wherein each of said energy applying members comprises a channel, said heater element heating the liquid so that bubbles causing the liquid droplets to be jetted are generated in the liquid, wherein an area of said heater element is equal to or less than 200 μm×112 μm.
- 5. The liquid jet head of claim 1, wherein a plurality of dots are formed on said medium by jetting of said liquid droplets from said liquid jetting orifices onto said medium.
- 6. A liquid jet method for jetting liquid droplets to a medium and forming a dot image on said medium, said liquid jet method comprising:providing a jetting apparatus including liquid jetting orifices from which liquid droplets are jetted; channels connected to said jetting orifices, said channels being filled with liquid and energy applying members provided in said channels for applying energy to the liquid in said channels on demand so that liquid droplets are jetted from said liquid jetting orifices, wherein a cross sectional area of each of said liquid orifices is within a range from 200 μm2 to 500 μm2, and wherein said energy applying members apply the energy to the liquid so that the liquid droplets, each of which has a flying velocity equal to or greater than 5.2 m/second, are jetted at a frequency which is within a range from 10 kHz to 40 kHz.
- 7. A medium on which liquid droplets are deposited by said liquid jet head claimed in said claim 1, to form a plurality of dots thereon.
- 8. A liquid jet apparatus for jetting liquid droplets to a medium in accordance with data on demand so that a dot is formed with a plurality of droplets on said medium, said liquid jet apparatus comprising:liquid jetting orifices from which liquid droplets are jetted, an area of each of said liquid jetting orifices being equal to or less than 500 μm2; and control means for controlling a frequency with which the droplets are jetted to fall within a range from 8 KHz to 40 Khz, a flying velocity of each droplet being equal to or greater than 5.2 m/sec., wherein said control means further controls a number of droplets which are jetted to form a dot formed on said medium based on the data and said number is equal to or less than twenty.
- 9. A medium on which liquid droplets are deposited by said liquid jet apparatus claimed in said claim 8, to form a plurality of dots thereon.
- 10. The liquid jet apparatus of claim 8, wherein a plurality of dots are formed on said medium by jetting of said liquid droplets from said liquid jetting orifices onto said medium.
- 11. A liquid jet apparatus for jetting liquid droplets to a medium in accordance with data on demand so that a dot is formed with plurality of droplets on said medium, said liquid jet apparatus comprising:liquid jetting orifices from which liquid droplets are jetted, an area of each of said liquid jetting orifices being equal to or less than 500 μm2; and a controller for generating and providing signals to said liquid jetting orifices, said controller controlling a frequency with which the droplets are jetted from said liquid jetting orifices to fall within a range from 8 KHz to 40 KHz, a flying velocity of each droplet being equal to or greater than 5.2 m/sec., wherein said controller further controls a number of droplets which are jetted to form a dot formed on said medium based on the data and said number is equal to or less than twenty.
- 12. A medium on which liquid droplets are deposited by said liquid jet apparatus claimed in said claim 11, to form a plurality of dots thereon.
- 13. The liquid jet apparatus of claim 11, wherein a plurality of dots are formed on said medium by jetting of said liquid droplets from said liquid jetting orifices onto said medium.
- 14. A liquid jet method for jetting liquid droplets to a medium in accordance with data on demand so that a dot is formed with a plurality of droplets on said medium, said liquid jet method comprising:providing liquid jetting orifices from which liquid droplets are jetted, an area of each of said jetting orifices being equal to or less than 500 μm2; and controlling a frequency with which the droplets are jetted to fall within a range from 8 KHz to 40 KHz, a flying velocity of each droplet being equal to or greater than 5.2 m/sec., and further controlling a number of droplets which are jetted to form a dot formed on said medium based on the data and said number is equal to or less than twenty.
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. 09/705,137 filed Nov. 2, 2000, now U.S. Pat. No. 6,568,778, which is a continuation of application Ser. No. 09/030,271 filed Feb. 25, 1998, now U.S. Pat. No. 6,193,348 which is a continuation of application Ser. No. 08/127,951, filed Oct. 29, 1996, now U.S. Pat. No. 5,877,786, which is a divisional of application Ser. No. 08/127,951, filed Sep. 27, 1993 now U.S. Pat. No. 5,610,637.
US Referenced Citations (28)
Foreign Referenced Citations (11)
Number |
Date |
Country |
0259541 |
Mar 1988 |
EP |
0476860 |
Mar 1992 |
EP |
0569429 |
Mar 1981 |
JP |
5943312 |
Oct 1984 |
JP |
59207265 |
Nov 1984 |
JP |
6353052 |
Mar 1988 |
JP |
2276648 |
Nov 1990 |
JP |
3173654 |
Jul 1991 |
JP |
3221456 |
Sep 1991 |
JP |
4118245 |
Apr 1992 |
JP |
0550612 |
Mar 1993 |
JP |
Continuations (3)
|
Number |
Date |
Country |
Parent |
09/705137 |
Nov 2000 |
US |
Child |
10/388700 |
|
US |
Parent |
09/030271 |
Feb 1998 |
US |
Child |
09/705137 |
|
US |
Parent |
08/738788 |
Oct 1996 |
US |
Child |
09/030271 |
|
US |