Method for reducing print distortion of ink drop writing apparatus
First Claim
1. In a method for writing information on a writing medium with ink drops which are sequentially generated, selectively charged in accordance with the information, and directed toward the writing medium so as to impinge thereon in column form for representing the information as a continuing mark formed by a sequence of charged ink drops, the improvement comprising the steps of utilizing a predetermined number of uncharged dummy drops for each column, and inserting a single uncharged dummy drop only at selected locations and in a predetermined order with respect to the drop positions for eliminating merging of adjacent charged ink drops when an uncharged dummy drop is inserted therebetween, the step of inserting including the steps of initialing determining an insertion location for inserting an uncharged dummy drop between the first and last two adjacent charged ink drops, respectively, of each sequence of charged ink drops along the column, and controlling the selective charging of the sequentially generated ink drops so as to insert the uncharged dummy drops at the determined locations of the column.
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Accused Products
Abstract
A method and apparatus for writing information on a writing medium with ink drops which are sequentially generated, selectively charged in accordance with the information, and directed toward the writing medium so as to impinge thereon in column form for representing the information as a continuing mark formed by a sequence of charged ink drops. A predetermined number of uncharged dummy drops is utilized for each column, and a single uncharged dummy drop is inserted only at selected locations and in a predetermined order with respect to the drop portion of the column for eliminating merging of adjacent charged ink drops when a uncharged dummy drop is inserted therebetween. An insertion location for inserting an uncharged dummy drop is initially determined between the first and last two adjacent charged ink drops, respectively, of each sequence of charged ink drops along the column and the sequentially generated ink drops are selectively charged so as to insert the uncharged dummy drops at the determined locations of the column.
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Citations
13 Claims
- 1. In a method for writing information on a writing medium with ink drops which are sequentially generated, selectively charged in accordance with the information, and directed toward the writing medium so as to impinge thereon in column form for representing the information as a continuing mark formed by a sequence of charged ink drops, the improvement comprising the steps of utilizing a predetermined number of uncharged dummy drops for each column, and inserting a single uncharged dummy drop only at selected locations and in a predetermined order with respect to the drop positions for eliminating merging of adjacent charged ink drops when an uncharged dummy drop is inserted therebetween, the step of inserting including the steps of initialing determining an insertion location for inserting an uncharged dummy drop between the first and last two adjacent charged ink drops, respectively, of each sequence of charged ink drops along the column, and controlling the selective charging of the sequentially generated ink drops so as to insert the uncharged dummy drops at the determined locations of the column.
- 7. In an apparatus for writing information on a writing medium with ink drops having means for sequentially generating the ink drops, means for selectively charging the ink drops in accordance with the information, and means for directing the charged ink drops toward the writing medium so as to impinge thereon in column form for representing the information as a continuing mark formed by a sequence of charged ink drops, the improvement comprising means for establishing a predetermined number of uncharged dummy drops to be utilized for each column, and means for inserting a single uncharged dummy drop only at selected locations and in a predetermined order with respect to the drop positions of the column for eliminating merging of adjacent charged ink drops when an uncharged dummy drop is inserted therebetween, the means for inserting including means for initially determining an insertion location for inserting an uncharged dummy drop between the first and last two adjacent charged ink drops, respectively, of each sequence of charged ink drops along the column, and means for controlling the selective charging means for selectively charging the sequentially generated ink drops so as to insert the uncharged dummy drops at the determined locations of the column.
Specification