US 8,014,694 B2Granted

Image forming apparatus and developing cartridge

AssigneeBrother Kogyo Kabushiki Kaisha

InventorsShougo Sato, Takeyuki Takagi, Naoya Kamimura

Life of this patent

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Abstract

A developing cartridge includes a case having a first sidewall and a second sidewall opposite to the first sidewall, and a developing roller disposed between the first sidewall and second sidewall. The developing roller can include a developing roller shaft and a developing roller member configured to carry a developing agent thereon, the developing roller member disposed around the developing roller shaft. Also, the developing cartridge can include an electrode disposed on the first sidewall adjacent to the developing roller shaft, the electrode electrically connected to the developing roller member, and a driven coupling disposed on the second sidewall. The electrode can include, an extending portion extending in a direction away from the first sidewall. An outermost periphery of the driven coupling defines a projection plane projecting in a direction towards the electrode, wherein at least a part of the extending portion is disposed within the projection plane.

Claims15

Dependent claims

A developing cartridge comprising:

a case including a first sidewall and a second sidewall opposite to the first sidewall;
a developing roller disposed between the first sidewall and second sidewall, the developing roller configured to carry a developing agent thereon, and to rotate about a first axis line;
an electrode disposed on the first sidewall and including a terminal portion extending in a direction away from the first sidewall, the terminal portion configured to contact a feeding member of an image forming apparatus, the electrode electrically connected to the developing roller;
and
a driven coupling disposed on the second sidewall, the driven coupling configured to be connected to a drive coupling of the image forming apparatus and to rotate about a second axis line upon receipt of a driving force from the drive coupling, the second axis line being parallel to the first axis line and being positioned a prescribed distance from the first axis line, an outermost periphery of the driven coupling defining a projection plane projecting in a direction of the second axis line towards the electrode,
wherein at least the terminal portion of the electrode is disposed to contact the feeding member within the projection plane.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/728,804Filed 22 Mar 2010 · continuation
Priority: JP 2005-2005108 Jul 2005
Published: US 2010/0296833 A125 Nov 2010
Granted: 6 Sep 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

G03G 15/065
For developing: arrangements for controlling the potential of the developing electrode
G03B 21/18
Details: fire preventing or extinguishing
G03G 15/0865
Arrangements for preparing, mixing, supplying or dispensing developer: arrangements for supplying new developer
G03G 21/1647
For connecting the different parts of the apparatus: mechanical connection means

Family

Application11/391,220Parent of this continuation-in-part · filed 29 Mar 2006
Application11/456,224Parent of this continuation · filed 10 Jul 2006
US 2010/0296833 A1Pre-grant publication · published 25 Nov 2010
US 7,693,443 B2Parent of this continuation
US 7,693,442 B2Parent of this continuation-in-part
Application11/456,224Parent of this continuation-in-part
US 2007/0009281 A1Published application
US 2007/0009282 A1Published application
US 8,014,694 B2This patent

From the US filing history. Foreign family members aren’t listed.