Apparatus for forming image
AssigneeMurata Kikai Kabushiki Kaisha
InventorTakashi Omori
Life of this patent
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Abstract
The picture image forming apparatus of a type which performs a light exposing on an image holding surface charged at a constant voltage by a charging device having a grid electrode to form an electrostatic latent image and then supplies a toner from a developing device to change the latent image into a visible image, including a voltage division and adjustment circuit for dividing a voltage applied to the grid electrode of the charging device and for adjusting the divided voltage to a predetermined bias voltage for the developing device, a modification and drive circuit for absorbing and modifying a fluctuation of the bias voltage which has been divided and adjusted by the division and adjustment circuit and for driving the division and adjustment circuit, and an operating circuit for operating the drive circuit.
Claims15
An image forming apparatus, comprising:
- charging means, including a grid electrode, for forming an electrostatic latent image on an image holding surface charged at a constant electrical potential,
- developing means for supplying toner to the image holding surface,
- voltage division and adjustment means for dividing a grid bias voltage applied to the grid electrode, for adjusting the divided grid bias voltage to produce an output voltage corresponding to predetermined developing bias voltage, and for applying the output voltage to the developing means;
- modification and drive means for stabilizing the output voltage and for driving the voltage division and adjustment means;
- and
- operation means for controlling times at which the modification and drive means drives voltages division and adjustment means.
Dependencies are inferred from the claim text.