IP Library Granted Patent US 8,983,345
Granted Patent B2
US 8,983,345 · App. 13/951,934 · Granted Mar 17, 2015

Developer supplying member, developing device, and image forming apparatus

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 8,983,345
App. No.
13/951,934
Granted
Mar 17, 2015
Kind
B2
Abstract

A developer supplying member is provided for supplying developer to a developer supporting member. The developer supplying member includes a foamed member having a discrete foam cell structure and being formed of a silicone rubber as a main component thereof. The foamed member constitutes a surface of the developer supplying member. The foamed member includes a foam cell wall dividing foam cells thereof and being exposed on the surface of the developer supplying member. The foam cell wall has a ten-point average surface roughness between 45.2 μm and 65.3 μm.

Claims (22)

1. A developer supplying member for supplying developer to a developer supporting member, comprising:

a foamed member having a discrete foam cell structure and being formed of a silicone rubber as a main component thereof,

wherein said foamed member constitutes a surface of the developer supplying member,

said foamed member includes a foam cell wall dividing foam cells thereof and being exposed on the surface of the developer supplying member, and

said foam cell wall has a ten-point average surface roughness Rz between 45.2 μm and 65.3 μm.

2. The developing device according to claim 1 , wherein said foamed member has a stress relaxation ratio between 23.7% and 30.8% upon being compressed.

3. A developing device, comprising:

the developer supporting member for developing a static latent image on an image supporting member with developer; and

the developer supplying member according to claim 1 .

4. An image forming apparatus, comprising:

the image supporting member; and

the developing device according to claim 3 .

5. A developer supplying member for supplying developer to a developer supporting member, comprising:

a foamed member having a discrete foam cell structure and being formed of a silicone rubber as a main component thereof,

wherein said foamed member constitutes a surface of the developer supplying member, and

said foamed member has a stress relaxation ratio between 23.7% and 30.8% upon being compressed.

6. A developing device, comprising:

the developer supporting member for developing a static latent image on an image supporting member with developer; and

the developer supplying member according to claim 5 .

7. An image forming apparatus, comprising:

the image supporting member; and

the developing device according to claim 6 .

Assignments (2)
MERGER Recorded Mar 14, 2022
From: OKI DATA CORPORATION
To: OKI ELECTRIC INDUSTRY CO., LTD.
Reel/Frame 059365/0145 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 26, 2013
From: MASUI, NAOKI
To: OKI DATA CORPORATION
Reel/Frame 030884/0739 →