Sealing ribs for a developer unit of a dual component development electrophotographic image forming device
US-9291947-B1 · Mar 22, 2016 · US
Developing apparatus
US8934819B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8934819-B2 |
| Application number | US-201213364758-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 2, 2012 |
| Priority date | Feb 3, 2011 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
A developing apparatus includes a developer carrying member for carrying a developer; and a magnetic member including a plurality of magnet pieces disposed inside the developer carrying member along a circumferential direction of the developer carrying member. The magnetic member includes one or more first magnet pieces having the same magnetic polarity at a surface opposing an inner surface of the developer carrying member, and one or more second magnet pieces having the other magnetic polarity opposing the inner surface of the developer carrying member. A total sum of the first magnet pieces is larger than a total sum of the second magnet pieces, and a ratio of the total sum of a volume of the first magnet pieces to a space occupied by the magnetic member is smaller at an end portion than in a central portion with respect to a longitudinal direction of the magnetic member.
First claim
Opening claim text (preview).
What is claimed is: 1. A developing apparatus comprising: a developer carrying member for carrying a developer; and a magnetic member including a plurality of magnet pieces disposed inside said developer carrying member along a circumferential direction of said developer carrying member, wherein said magnetic member includes one or more first magnet pieces having a first magnetic polarity at a surface opposing an inner surface of said developer carrying member, and one or more…
Assignees
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Classifications
- G03G15/0928Primary
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8934819B2 cover?
- A developing apparatus includes a developer carrying member for carrying a developer; and a magnetic member including a plurality of magnet pieces disposed inside the developer carrying member along a circumferential direction of the developer carrying member. The magnetic member includes one or more first magnet pieces having the same magnetic polarity at a surface opposing an inner surface of…
- Who is the assignee on this patent?
- Sakamaki Tomoyuki, Iida Takanori, Canon Kk
- What technology area does this patent fall under?
- Primary CPC classification G03G15/0928. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 13 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).