Image forming apparatus, image forming method and non-transitory computer-readable storage medium
US-9223279-B2 · Dec 29, 2015 · US
Image forming apparatus with density measuring portion
US9983532B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9983532-B2 |
| Application number | US-201615244562-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 23, 2016 |
| Priority date | Sep 15, 2015 |
| Publication date | May 29, 2018 |
| Grant date | May 29, 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: a roller arranged in a position between a drive roller and an idle roller and downstream from the drive roller in a rotation direction of an intermediate transfer belt while pressing an outer surface of the belt; and a density measuring portion arranged between the drive roller and the roller applying pressure. The density measuring portion optically detects the density of a test patch formed on the outer surface and in a given position of a width direction of the belt. The density measuring portion includes: an optical sensor provided above the outer surface of the belt; and a support member abutting on an inner surface of the belt in a position in which the support member faces the optical sensor across the belt in the rotation direction.
First claim
Opening claim text (preview).
What is claimed is: 1. A toner image forming apparatus comprising: a first roller; a second roller juxtaposed to the first roller; an endless transfer belt stretched rotatably between the first roller and the second roller; a third roller arranged in a position parallel to the first roller and the second roller and downstream from the first roller in a rotation direction of the transfer belt while pressing an outer surface of the transfer belt; and a density measuring portion arranged between the first roller and the third roller, the density measuring portion optically detecting a toner density of a test patch which is a toner image formed on the outer surface of the transfer belt and in a given position of a width direction of the transfer belt, wherein the density measuring portion comprises: an optical sensor provided between the first roller and the third roller and above the outer surface of the transfer belt, the optical sensor making measurement in a position that corresponds to a pathway of the test patch in the width direction formed on the transfer belt; and a support member abutting on an inner surface of the transfer belt in a position in which the support member faces the optical sensor across the transfer belt in the rotation direction, the support member including a ridge extending parallel to the width direction of the transfer belt and abutting on the transfer belt at the ridge. 2. The toner image forming apparatus according to claim 1 , wherein the optical sensor is arranged downstream from a place of the abutment of the support member on the transfer belt in the rotation direction. 3. The toner image forming apparatus according to claim 1 , wherein the support member includes a low-friction material provided in a place where the support member abuts on the transfer belt.
Assignees
Inventors
Classifications
- G03G15/5058Primary
using a test patch · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9983532B2 cover?
- An image forming apparatus includes: a roller arranged in a position between a drive roller and an idle roller and downstream from the drive roller in a rotation direction of an intermediate transfer belt while pressing an outer surface of the belt; and a density measuring portion arranged between the drive roller and the roller applying pressure. The density measuring portion optically detects…
- Who is the assignee on this patent?
- Sharp Kk
- What technology area does this patent fall under?
- Primary CPC classification G03G15/5058. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 29 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).