Incremental printing of symbolic information – Ink jet – Controller
Reissue Patent
2006-01-24
2006-01-24
Meler, Stephen D. (Department: 2853)
Incremental printing of symbolic information
Ink jet
Controller
C347S009000, C347S010000, C347S011000
Reissue Patent
active
RE038941
ABSTRACT:
In an ink droplet ejecting method and apparatus, by merely adding one pulse after a driving waveform for a main ejection of ink, without changing the driving voltage, it is possible to obtain an ink droplet of a desired volume and also possible to minimize the decrease of the ink droplet speed. The pulse width Wa of a jet pulse signal A is set equal to time T required for one-way propagation through an ink chamber of a pressure wave which is generated in the ink chamber, while the pulse width Wb of an additional pulse signal B is set at 0.2T to 0.6T, and a time difference between a fall timing of the jet pulse signal A and a rise timing of the additional pulse signal B is set at 0.3T to 0.7T, whereby an ink droplet being ejected is reduced in size and only one drive voltage is sufficient. Thus, the cost can be reduced, and a decrease of the ink droplet speed is prevented.
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U.S. Appl. No. 10/665,805.
Brother Kogyo Kabushiki Kaisha
Huffman Julian D.
Meler Stephen D.
Oliff & Berridg,e PLC
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