Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1998-03-13
2000-08-22
Braun, Fred L.
Incremental printing of symbolic information
Ink jet
Ejector mechanism
B41J 206
Patent
active
061061042
ABSTRACT:
An image forming apparatus having a carrier for carrying toner, a back electrode disposed with a space between the carrier and back electrode, a control electrode disposed between the carrier and back electrode, for forming an electric field capable of causing toner on the carrier to fly toward the back electrode from the carrier and for forming an image by causing selectively the toner to fly and adhere to a recording medium according to an image signal, and a voltage applying section for applying an oscillating voltage to the control electrode. In order to prevent resonance of the control electrode, the oscillating voltage to be applied to the control electrode is set so that minimum natural numbers m and n satisfying that m times a frequency of the oscillating voltage to be applied to the control electrode is equal to n times the characteristic vibration frequency of the control electrode are more than 10. With this structure, it is possible to form an image with improved image quality quietly by preventing generation of noise due to vibrations of the control electrode, and suppressing the displacement of the control electrode.
REFERENCES:
patent: 5036341 (1991-07-01), Larsson
patent: 5202704 (1993-04-01), Iwao
patent: 5293181 (1994-03-01), Iwao et al.
patent: 5357274 (1994-10-01), Kitamura
patent: 5359361 (1994-10-01), Iwao et al.
Fujita Hirokazu
Imaizumi Daisaku
Braun Fred L.
Conlin David G.
Daley, Jr. William J.
Sharp Kabushiki Kaisha
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