Method of reducing drive energy in a high speed thermal ink jet

Details Method of reducing drive energy in a high speed thermal ink jet Method of reducing drive energy in a high speed thermal ink jet

1995-02-24

1997-02-04

Hartary, Joseph W.

Incremental printing of symbolic information

Ink jet

Controller

347 15, 347 57, B41J 205

Patent

active

056003498

ABSTRACT:
A thermal ink jet printer including a printhead having a plurality of ink drop firing resistors responsive to ink drop firing pulse groups wherein a pulse group includes one or more pulses sufficiently closely spaced to produce respective droplets which merge in flight to form an ink drop whose volume depends on the number of pulses in the pulse group. The pulses in a pulse group are controlled such that the energy of the second and successive pulses is less than the energy of the first pulse. The intervals between leading edges of the pulses in a pulse group can be constant or reduced such that the intervals between adjacent pulses beginning with the second pulse is less than the interval between the leading edges of the first and second pulses.

REFERENCES:
patent: 4503444 (1985-03-01), Tacklind
patent: 4513299 (1985-04-01), Lee
patent: 5285215 (1994-02-01), Liker
Patent Abstracts of Japan, vol. 7, No. 85 (M-206) 9 Apr. 1983 & JP-A-58 011 169 (Canon Kabushiki Kaisha) 21 Jan. 1983.
European Search Report, Feb. 22, 1995, re Application 94300396.2.

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