| 摘要 |
A printing machine comprising a cylindrical applicator has a spiral groove formed on the peripheral surface and is rotatable. A doctor blade used to wipe away excess ink and to insure adequate ink in the grooves. Electrodes are provided opposite the groove and paper is fed at a speed slower than the rotating peripheral speed of the applicator. A voltage related to the character to be printed is sequentially fed to the opposite electrodes to attract ink in the groove with the paper and print the character. In another embodiment a plurality of applicators are used with each applicator having a counter electrode having a stylus electrode array. As voltages are applied to the array the ink in the adjacent groove swells and contacts the paper. The voltages are staggered between the two electrode arrays. In a third embodiment, using multineedle electrodes raises the ink electrostaticly to the top portion of the applicator. The ink is transferred from the top of the applicator on to an image transferring roll and thereafter on to the recording paper. A fourth embodiment uses spiral back electrodes disposed on the rear surface of a paper carrying drum. The drum and the applicator are rotated at the same peripheral speed so that the position of the drum relative to the grooves on the applicator will vary for each revolution.
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