Ink jet recording device

摘要

Under a condition in which bowed printing occurs, a horizontal shift is suppressed to improve print quality. Following a program stored in a ROM 12, an MPU 10 generates video data for charging print particles according to print contents data stored in a RAM 11. Based on the print contents data, the MPU 10 detects a letter to be printed last, and when the letter to be printed last is printed to end a print operation, generates video data so that based on the video data, a non-print charge voltage driving non-print particles to an extent that they do not fly over a gutter 25 is applied to non-print particles. The number of the non-print particles subjected to the non-print charge voltage is determined by the MPU 10, based on the distance from a print head 2 to a print subject 30, a letter height preset value, etc. A character signal generating circuit 18 generates the non-print charge voltage, based on the video data, and applies the generated the non-print charge voltage to a charging electrode 22.

主权项

1. An ink jet recording device comprising:
a print head including:
a nozzle that excites ink to jet it in a form of ink particles;a charging electrode that charges the ink particles;a deflector electrode that generates an electric field by which the charged ink particles are deflected; anda gutter that captures and reclaims an ink particle not used for printing; and a printing control unit that controls a voltage applied to the charging electrode, wherein
the printing control unit causes the charging electrode to apply a charge voltage to a print particle that is an ink particle to be landed on a print subject, and to apply a non-print charge voltage to a non-print particle that is an ink particle not to be landed on the print subject, the non-print charge voltage being a charge voltage driving the non-print particle to an extent that it does not fly over the gutter and having a polarity identical to that of the print particle to be landed on the print subject, so that bowed printing during high-speed printing is suppressed, andwhen the charge voltage is applied consecutively to two or more of the print particles, the printing control unit applies the non-print charge voltage to the non-print particle being present between the print particle subjected to the charge voltage last among the two or more of print particles and a print particle to be subjected to the charge voltage next.