Image forming apparatus
US-9217976-B2 · Dec 22, 2015 · US
Image forming apparatus which uses an AC voltage and/or a DC voltage at a transfer nip depending on a surface roughness of a recording sheet
US8977153B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8977153-B2 |
| Application number | US-201213680629-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 19, 2012 |
| Priority date | Nov 30, 2011 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 2015 |
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 a controller and a transfer device including a power source to output a superimposed bias in which an AC voltage is superimposed on a DC voltage, a first electrode, a second electrode disposed opposite the first electrode with an image bearing member interposed therebetween to form a transfer electric field to transfer a toner image on the image bearing member to a recording medium. The controller including a CPU adjusts the transfer electric field and a transfer speed. One of the first electrode and the second electrode is connected to the power source, and the other is grounded. The controller adjusts the transfer speed such that in a case in which an oscillating electric field of the transfer electric field is strong, a maximum transfer speed is slower than the maximum transfer speed in a case in which the oscillating electric field is weak.
First claim
Opening claim text (preview).
What is claimed is: 1. An image forming apparatus, comprising: an image bearing member that bears a toner image; a transfer member that forms a transfer nip between the image bearing member and the transfer member; a power source that outputs any one of a DC transfer voltage and a superimposed transfer voltage in which an AC voltage is superimposed on a DC voltage to transfer the toner image from the image bearing member onto a recording sheet at the transfer nip; and a cont…
Assignees
Inventors
Classifications
Physics · mapped topic
- G03G15/1605Primary
Physics · mapped topic
Physics · mapped topic
- G03G15/18Primary
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 US8977153B2 cover?
- An image forming apparatus includes a controller and a transfer device including a power source to output a superimposed bias in which an AC voltage is superimposed on a DC voltage, a first electrode, a second electrode disposed opposite the first electrode with an image bearing member interposed therebetween to form a transfer electric field to transfer a toner image on the image bearing membe…
- Who is the assignee on this patent?
- Ogiyama Hiromi, Takeuchi Tomokazu, Shimizu Yasunobu, and 4 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 Mar 10 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).