Image forming apparatus
US-9217976-B2 · Dec 22, 2015 · US
Image forming apparatus
US9134656B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9134656-B2 |
| Application number | US-201414256178-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 18, 2014 |
| Priority date | May 1, 2013 |
| Publication date | Sep 15, 2015 |
| Grant date | Sep 15, 2015 |
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Abstract
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An image forming apparatus includes an image carrier, a transfer member, a power supply, and a control device that controls the power supply to output a DC-AC superimposed bias or a DC bias to transfer a toner image on the image carrier onto a recording medium. The control device controls the power supply to alternately output a first bias being a DC component the same in polarity as the DC bias and a second bias being a DC component opposite in polarity to the DC bias to clean the transfer member when image formation is not taking place. The first bias is output with two target output values including a first value and a second value lower than the first value. The second bias is output with one target output value. An output time of the second bias is longer than an output time of the first bias.
First claim
Opening claim text (preview).
What is claimed is: 1. An image forming apparatus comprising: an image carrier to carry a toner image; a transfer member to form a transfer nip between the image carrier and the transfer member; a power supply to output a superimposed bias having a direct-current component superimposed with an alternating-current component and a direct-current bias including a direct-current component; and a control device that controls the power supply to output the superimposed bias or the…
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Physics · mapped topic
- G03G15/1605Primary
Physics · mapped topic
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- What does patent US9134656B2 cover?
- An image forming apparatus includes an image carrier, a transfer member, a power supply, and a control device that controls the power supply to output a DC-AC superimposed bias or a DC bias to transfer a toner image on the image carrier onto a recording medium. The control device controls the power supply to alternately output a first bias being a DC component the same in polarity as the DC bia…
- Who is the assignee on this patent?
- Mizutani Takehide, Ishii Hirokazu, Kato Tsutomu, and 5 more
- What technology area does this patent fall under?
- Primary CPC classification G03G15/1605. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Sep 15 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).