Claims
- 1. An ink jet printing method by means of an electrostatic type ink jet printing apparatus in which the ink is ejected through a nozzle of an ink ejection head and broken into droplets, said droplets are charged by charging electrode means and deflected by deflection electrode means, and finally dots are marked on a sheet of recording paper: characterized in that said ink droplets are charged in such a manner that the maximum charging stage number M is divided into groups where M>3, each group having the same number of droplets; and the charging is performed, in order from the first group to the final group; droplets for printing the first group being charged so that they impinge on the recording paper at respective intervals K; droplets for printing the second group and each subsequent group being charged so that they impinge on the recording paper also at respective intervals K and midway between the droplets of the preceding group.
- 2. An ink jet printing method by means of an electrostatic type ink jet printing apparatus in which the ink is ejected through a nozzle of an ink ejection head and broken into droplets, said droplets are charged by charging electrode means and deflected by deflection electrode means, and finally dots are marked on a sheet of recording paper: wherein said ink droplets are charged in such a manner that the maximum charging stage number M is divided into groups of number K, which number K is a quotient obtained by dividing said maximum charging stage number M by a natural number N (N.gtoreq.3) and the charging is performed, in order from the first group to the final group; droplets for printing the first group being charged so that they impinge on the recording paper at respective intervals K starting from an optional stage which stage number is equal to or smaller than K; droplets for printing the second group being so charged that they impinge on the recording paper also at respective intervals K starting from a middle state L between the zero stage or the K-th stage and said optional stage, and droplets for printing the third group being so charged that they impinge on the recording paper at respective intervals K starting from the middle stage between said optional stage in the first group and said starting stage L in the second group; in case of charging an ink droplet adapted to print the n-th stage of the i-th group, it is judge whether ink droplets near to said ink droplet exist in the preceding (i-1)-th group, and the amount of the aerodynamic-resistance-distortion due to said ink droplets in the (i-1)-th group is considered for adding said amount as a compensating factor to the charging amount of said ink droplet corresponding to the n-th stage of the i-th group when there are such ink droplets in the (i-1)-th group, and it is further judged whether ink droplets near to said ink droplet exist in the i-th group and the amount of the Coulomb's-force-distortion due to said ink droplets in the i-th group is considered for adding said amount as a compensating factor to the charging amount of said ink droplet corresponding to the n-th stage of the i-th group when there are such ink droplets in the i-th group.
- 3. An ink jet printing method as defined in claim 2 wherein the said groups are of number K, which is a quotient obtained by dividing said maximum charging stage number M by a natural number N (N.gtoreq.3), and wherein the said respective intervals K start from an optional stage which stage number is equal to or smaller than K, droplets for printing the second group being so charged that they impinge on the recording paper also at respective intervals K starting from a middle stage L between the zero stage or the K-th stage and said optional stage, and droplets for printing the third group being so charged that they impinge on the recording paper at respective intervals K starting from the middle stage between said optional stage in the first group and said starting stage L in the second group.
- 4. An ink jet printing method as defined in claim 2 characterized in that in case of two middle stages between the zero stage or the K-th stage and the starting stage in the first group the middle stage at a longer distance from said optional stage is selected as the starting stage of the second group.
- 5. An ink jet printing method as defined in claim 2 characterized in that in case of two middle stages between the starting stages in the first group and in the second group the middle stage at a longer distance from said starting stage in the second group is selected as the starting stage of the third group.
Priority Claims (2)
Number |
Date |
Country |
Kind |
55-18889 |
Feb 1980 |
JPX |
|
55-34634 |
Mar 1980 |
JPX |
|
Parent Case Info
This application is a continuation of my copending application Ser. No. 234,954, filed Feb. 17, 1981, and now abandoned.
US Referenced Citations (4)
Continuations (1)
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Number |
Date |
Country |
Parent |
234954 |
Feb 1981 |
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