Ink jet recording head having means for controlling ink droplets

Details Ink jet recording head having means for controlling ink droplets Ink jet recording head having means for controlling ink droplets

1995-06-07

1997-08-12

Tran, Huan H.

Incremental printing of symbolic information

Ink jet

Controller

347 14, 347 57, 347 61, B41J 207

Patent

active

056570600

ABSTRACT:
An ink jet recording method includes the steps of inputting a set of driving pulses to a heater element so that the heater element is repeatedly activated by the driving pulses, repeatedly generating a bubble in ink in an ink path in accordance with repeated activation of the heater element, and separately jetting ink droplets from an ink jetting orifice due to the bubble repeatedly generated in the ink, a number of the ink droplets being equal to a number of the driving pulses input as a set to the heater element, the ink droplets jetted from the ink jetting orifice forming a single dot on a recording medium, wherein a time interval at which the driving pulses are input to the heater element is equal to or greater than 4T, T being a time period from a time at which the inputting of the pulses to the heater element starts to a time at which the bubble reaches a maximum size, and each ink droplet is a slender pillar so that a length of each ink droplet is at least three times as great as a diameter thereof. The present invention also relates to other ink jet recording methods and recording heads in which very small ink droplets can be stably jetted in a high frequency.

REFERENCES:
patent: 4503444 (1985-03-01), Tacklind
patent: 4617580 (1986-10-01), Miyakawa
patent: 5202659 (1993-04-01), DeBonte et al.
patent: 5252986 (1993-10-01), Takaoka et al.
patent: 5293182 (1994-03-01), Sekiya et al.
patent: 5389962 (1995-02-01), Sekiya et al.
patent: 5420618 (1995-05-01), Sekiya et al.

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