Image forming apparatus
US-2024345519-A1 · Oct 17, 2024 · US
Image forming apparatus with a controller to set transfer bias
US9864307B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9864307-B2 |
| Application number | US-201615076031-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 21, 2016 |
| Priority date | Jun 28, 2011 |
| Publication date | Jan 9, 2018 |
| Grant date | Jan 9, 2018 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
An image forming apparatus includes an image bearing member to bear a toner image charged with a predetermined polarity, and a power source to apply a bias to a transfer portion to transfer the toner image from the image bearing member to a recording medium, a polarity of the bias being changed alternately. The toner image formed with toner of a plurality of colors is transferred in a color mode and the toner image formed with toner of a single color is transferred in a monochrome mode. The bias includes a peak voltage with a polarity that returns toner from the recording medium to the image bearing member. An absolute value of the peak voltage in the color mode is equal to or greater than an absolute value of the peak voltage in the monochrome mode.
First claim
Opening claim text (preview).
What is claimed is: 1. An image forming apparatus, comprising: an image bearing member to hear a toner image charged with a predetermined polarity; and a power source to apply a bias to a transfer portion to transfer the toner image from the image bearing member to a recording medium, a polarity of the bias being changed alternately between a negative polarity and a positive polarity, wherein the toner image formed with toner of a plurality of colors is transferred in a color…
Assignees
Inventors
Classifications
Physics · mapped topic
- G03G15/0189Primary
Physics · mapped topic
- G03G15/1665Primary
Physics · mapped topic
Physics · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9864307B2 cover?
- An image forming apparatus includes an image bearing member to bear a toner image charged with a predetermined polarity, and a power source to apply a bias to a transfer portion to transfer the toner image from the image bearing member to a recording medium, a polarity of the bias being changed alternately. The toner image formed with toner of a plurality of colors is transferred in a color mod…
- Who is the assignee on this patent?
- Sengoku Kenji, Ogiyama Hiromi, Haga Hiroyoshi, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification G03G15/0189. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 09 2018 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).