Image forming apparatus
US-2016349657-A1 · Dec 1, 2016 · US
Image forming apparatus comprising a plurality of charging rollers
US8948636B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8948636-B2 |
| Application number | US-201314074563-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 7, 2013 |
| Priority date | Jul 2, 2012 |
| Publication date | Feb 3, 2015 |
| Grant date | Feb 3, 2015 |
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Abstract
Official abstract text for this publication.
A changing voltage is applied to a first charging roller. A voltage obtained by superimposing an alternating voltage on a direct voltage is applied to a second charging roller disposed on the downstream side of the first charging roller in the rotation direction of a photosensitive member. During image formation, the changing voltage applied to the first charging roller is changed so that the magnitude relationship between the potential of the photosensitive member which has been charged by using the first charging roller and which has reached a position at which the photosensitive member is charged by using the second charging roller and the direct voltage applied to the second charging roller is alternately switched.
First claim
Opening claim text (preview).
The invention claimed is: 1. An image forming apparatus comprising: a rotatable photosensitive member; a first charging roller for charging the photosensitive member; a second charging roller for charging the photosensitive member on the downstream side of the first charging roller in a rotation direction of the photosensitive member; a toner image forming unit disposed on the downstream side of the second charging roller in the rotation direction of the photosensitive membe…
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- G03G15/0283Primary
Physics · mapped topic
- G03G15/80Primary
Physics · mapped topic
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- What does patent US8948636B2 cover?
- A changing voltage is applied to a first charging roller. A voltage obtained by superimposing an alternating voltage on a direct voltage is applied to a second charging roller disposed on the downstream side of the first charging roller in the rotation direction of a photosensitive member. During image formation, the changing voltage applied to the first charging roller is changed so that the m…
- Who is the assignee on this patent?
- Canon Kk
- What technology area does this patent fall under?
- Primary CPC classification G03G15/0283. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Feb 03 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).