Image forming apparatus and printer having a double-sided printing mode
First Claim
1. An image forming apparatus having a double-sided print mode, comprising:
- charging means for charging an image carrier;
charge voltage loading means for applying a charge voltage to said charging means;
image forming means for forming an image on a recording material; and
control means for controlling the charge voltage applied by said charge voltage loading means to said charging means,wherein, when an image is formed on both sides of a plurality of recording materials, said control means changes the charge voltage during an interval in which an image is formed on a first side and a second side of the recording material by said image forming means to a second charge voltage which is different from a first charge voltage applied by said charge voltage loading means in a period in which an image is formed on the recording material, and said control means does not change the charge voltage during an interval between a first recording material and a second recording material of the plurality of recording materials to the second charge voltage.
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Abstract
An image forming apparatus operating in a double-sided print mode, includes a charger for charging an image carrier, a charge voltage loader for applying a charge voltage to the charger, an image forming device for forming an image on a recording material, and a controller for controlling the charge voltage applied by the charge voltage loader to the charger. When an image is formed on both sides of a plurality of recording materials, the controller changes the charge voltage applied by the charge voltage loader from a first to a second voltage when an image is formed on first and second sides of the recording material in a period in which an image is formed on the recording sheet, and does not change the charge voltage during an interval between a first recording material and a second recording material to the second charge voltage.
13 Citations
8 Claims
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1. An image forming apparatus having a double-sided print mode, comprising:
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charging means for charging an image carrier; charge voltage loading means for applying a charge voltage to said charging means; image forming means for forming an image on a recording material; and control means for controlling the charge voltage applied by said charge voltage loading means to said charging means, wherein, when an image is formed on both sides of a plurality of recording materials, said control means changes the charge voltage during an interval in which an image is formed on a first side and a second side of the recording material by said image forming means to a second charge voltage which is different from a first charge voltage applied by said charge voltage loading means in a period in which an image is formed on the recording material, and said control means does not change the charge voltage during an interval between a first recording material and a second recording material of the plurality of recording materials to the second charge voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A printer having a double-sided print mode, comprising:
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a charging portion configured and positioned to charge an image carrier; a charge voltage loading unit configured and positioned to apply a charge voltage to said charging portion; an image forming portion configured and positioned to form an image on a recording material; and a controller configured and positioned to control the charge voltage applied by said charge voltage loading unit to said charging portion, wherein, when an image is formed on both sides of a plurality of recording materials, said controller changes the charge voltage during an interval in which an image is formed on a first side and a second side of the recording material by said image forming portion to a second charge voltage which is different from a first charge voltage applied by said charge voltage loading unit in a period in which an image is formed on the recording material, and the controller does not change the charge voltage during an interval between a first recording material and a second recording material of the plurality of recording materials to the second charge voltage.
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Specification