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| Number | Title | Issue Date |
| 8170442 | Developing cartridge and image forming apparatus A developing cartridge includes a first frame including a first wall at one end thereof, a second frame including a pair of second walls facing with each other and a third wall that connects the pair of second walls, an opening that is formed by the first wall, the ... | 05/01/2012 |
| 8139976 | Developing apparatus, process cartridge, and image forming apparatus A developing apparatus comprises: a housing having an opening that opens towards an image carrier on which an electrostatic latent image is formed, and a developer storing unit in which a developer is stored; a developer carrier that carries the developer stored in ... | 03/20/2012 |
| 8131180 | Developer cartridge and developing apparatus using the same, process cartridge and image forming device using the same A developing apparatus includes a housing having an opening that opens towards an image carrier onto which an electrostatic latent image is formed, a developer accommodating unit in which a developer is accommodated, and a continuous charge hole connected with the d... | 03/06/2012 |
| 8126355 | Developing device with seal member that abuts toner carrier roller A developing device, includes: a housing that stores toner inside; a toner carrier roller that is shaped approximately like a cylinder, is mounted to the housing rotatably about a rotational axis, rotates while carrying the toner on a surface thereof to convey the t... | 02/28/2012 |
| 8121514 | Developing device and image forming apparatus employing the same A developing device has a housing including a toner container containing toner, and a developing unit. The developing unit includes a developing roller and a photoconductive drum, and a barrier member including a toner supply window. The barrier member is combined w... | 02/21/2012 |
| 8116657 | Upper seal for inhibiting doctor blade toner leakage A seal assembly for inhibiting toner leakage comprises a j-seal received by a developer housing in a toner cartridge. The j-seal has an upper seat portion engagably sealing with a doctor blade seal and a leg for slidably sealing of a developer roll. The upper seat p... | 02/14/2012 |
| 8107850 | Developing device A developing device is provided. The developing device includes a housing, a developing agent carrier, and a developing agent leakage prevention member. The developing agent leakage prevention member has a first layer that is configured to contact an outer circumfer... | 01/31/2012 |
| 8099013 | Image forming apparatus and image forming unit including sealing member An image forming apparatus includes an image forming unit. The image forming unit is detachable with respect to the image forming apparatus. The image forming unit includes a development part, a developer accommodation part, a connection part and a sealing member. T... | 01/17/2012 |
| 8099012 | Developer roll lip seal A toner seal comprises a j-shaped seal having an upper seat portion and a leg portion, the leg having a front face extending between first and second edges of said leg portion, a lip seal extending along at least one of the first and second edges of the leg, and, th... | 01/17/2012 |
| 8095033 | Winding member, cartridge, and cartridge assembling method A winding member winds a seal member that seals an opening of a developer storage unit. The winding member includes a first holding portion having a first engaging portion, and a second holding portion having a second engaging portion to be engaged with the first en... | 01/10/2012 |
| 8086134 | Developing unit including side seal member between end of developer carrier and housing A developing unit is provided that includes a developer carrier; a housing; and a side sealing member disposed between an end part of the developer carrier and a portion of the housing adjacent to a supply port. The side sealing member includes an upstream side seal... | 12/27/2011 |
| 8081897 | Seal member, developing device, process cartridge, and image forming apparatus A seal member covers a space between a developing roller and a casing of a developing device. The seal member includes a flexible sheet and a reinforcing member fixed to the sheet. The reinforcing member is fixed to the casing. Notches are provided in the reinforcin... | 12/20/2011 |
| 8045882 | Self-sealing process roller A process roller for use with an imagining cartridge, the process roller including sealing surfaces located at its distal ends. As the process roller rotates, the sealing surfaces of the process roller are sufficiently flexible to conform to the inner side walls of ... | 10/25/2011 |
| 8041251 | Developing device and image forming device A developing device used for forming a toner image by developing the electrostatic latent image on an electrostatic latent image carrier in an image forming device, comprises a developer carrier roller which is rotationally driven, and a toner thin layer forming mem... | 10/18/2011 |
| 8041250 | Developing device and image forming apparatus with seal members A developing device according to an aspect of the invention includes: a housing; a developing roller comprising a roller main body having a circumferential surface, the developing roller being rotatably supported to the housing; and seal members respectively dispose... | 10/18/2011 |
| 8032052 | Developing device and image forming apparatus A developing device containing a developer holding body for executing developing by affixing developer to an image support body, a controlling unit for thinning a layer of developer and disposed to contact the developer holding body, a support unit for supporting th... | 10/04/2011 |
| 7991319 | Image forming apparatus with seal member that abuts surface of toner carrier roller having convex and concave sections In an image forming apparatus, a toner carrier roller rotatably mounted to a housing that stores toner rotates to convey toner to an opposed position facing a latent image carrier outside the housing. A plurality of convex sections are regularly arranged on a surfac... | 08/02/2011 |
| 7974549 | Developing device and image forming apparatus A developing device includes: a developing roller on the surface of which intersecting inclined grooves are formed by rolling working; and a seal member which comes into contact with the developing roller, wherein ridge portions of a convex portion surrounded by the... | 07/05/2011 |
| 7949282 | Developing device and image forming apparatus including the same A developing device includes a housing, a developing roller that carries developer, a supply roller for supplying the developer, a developer cartridge that accommodates the developer, a first sealing member that is provided at both ends of the developing roller, a d... | 05/24/2011 |
| 7933534 | Developing device frame unit, developing device, process cartridge, and manufacturing method of the developing device frame unit A developing device frame unit supporting a regulating member regulating the layer thickness of developer on a developer carrier. The unit includes a frame having a seal forming portion, first and second, first and second end seals contactable to the carrier surface... | 04/26/2011 |
| 7925180 | Image forming apparatus, image formation process unit, and developing unit An image forming apparatus includes a main body, image formation units disposed in the main body, a moving member disposed in the main body, the moving member including a surface facing each image formation unit, a pair of first stoppers disposed in each image forma... | 04/12/2011 |
| 7917054 | Image developing apparatus and image forming apparatus using the apparatus An image developing apparatus includes an upper case; a lower case disposed on a lower side of the upper case, and internally housing a developing agent, and having an opening. A photoconductive drum is disposed on the upper case for forming an electrostatic latent ... | 03/29/2011 |
| 7912402 | Developing device with leakage preventing member, process cartridge with leakage preventing member, and method for attaching developing roller to developer container An aspect of the invention provides a developing device including: a developer container that contains developer and is formed with an opening; a developing roller that is rotatably supported by the developer container at a predetermined position and includes a roll... | 03/22/2011 |
| 7899357 | Reinforced doctor blade assembly seal and printer cartridge employing the reinforced seal A reinforced doctor blade assembly seal for use in a printer cartridge includes a base strip of a flexible plastic film having a thickness, a surface of predetermined area bounded by multiple edges, and a foldable region extending length-wise between one pair of the... | 03/01/2011 |
| 7899356 | Developing device, image carrier device, and image forming apparatus A layer-thickness regulating member includes a thin plate member and a projection member provided on a free edge portion of the thin plate member. A leak preventing members include a first seal member and a second seal member. The first seal member includes a first ... | 03/01/2011 |
| 7865109 | Developing apparatus and image forming apparatus A developing apparatus is provided that can reliably prevent a developer from leaking even where the developing apparatus is continuously used, and an image forming apparatus having the developing apparatus is provided. The developing apparatus has a developer conta... | 01/04/2011 |
| 7813668 | Process cartridge, developing cartridge and electrophotographic image forming apparatus A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus and which is transportable in a state of being mounted to the main assembly of the apparatus. The cartridge includes an electrophotographic photosensitiv... | 10/12/2010 |
| 7769316 | Developing unit and process cartridge for reducing toner scattering, and image forming apparatus using the same A developing unit for developing a latent image formed on an image carrier includes a developer carrier, a developer regulator, and a sealing member. The developer carrier bears a developer, and is disposed facing the image carrier at a first position. The developer... | 08/03/2010 |
| 7764901 | Developing device, image carrier device, and image forming apparatus A layer-thickness regulating member may include a thin plate member and a projection member. The projection member includes a first pressure contact portion that comes into pressure-contact with each of seal areas, a second pressure contact portion that comes into p... | 07/27/2010 |
| 7751744 | Development apparatus, process cartridge and image formation apparatus, including dust prevention sheet A development apparatus has a casing, a regulation plate, a smoky dust prevention sheet and a backup member which are fixed together onto the casing with a screw. The backup member sandwiches a fixed end portion of the smoky dust prevention sheet with the regulation... | 07/06/2010 |
| 7751745 | Developing apparatus, image forming apparatus having the same, and assembling method of a developing apparatus A developing apparatus usable with an image forming apparatus includes a developer receptacle having a sidewall on which a shaft hole is formed, a rotation shaft having a length shorter than a distance between opposite sidewalls of the developer receptacle and an en... | 07/06/2010 |
| 7751743 | Developer cartridge, process cartridge and image-forming device A developer cartridge includes a developer roller, a support member and a first seal member. The developer roller has a rotational axis and a peripheral surface. The peripheral surface includes a center zone and an end zone at one end portion in an axial direction. ... | 07/06/2010 |
| 7742718 | Developing device preventing damage by toner and image forming apparatus having the same A developing device includes: a developing roller that supplies toner so as to develop an electrostatic latent image into a toner image; and a seal member that prevents toner from leaking from end portions in the axial direction of the developing roller to the outsi... | 06/22/2010 |
| 7734213 | Developing device, process cartridge, and image forming apparatus A secure seal is provided between a blade unit and a housing in a developer unit of an image forming apparatus by utilizing a sheet member configured to cover a step height formed on a surface of the blade unit facing a sealing member. ... | 06/08/2010 |
| 7720408 | Process cartridge, developing cartridge and electrophotographic image forming apparatus A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus and which is transportable in a state of being mounted to the main assembly of the apparatus. The cartridge includes an electrophotographic photosensitiv... | 05/18/2010 |
| 7706714 | Image-forming device and developer cartridge having leakage restraining member and developer moving member An image-forming device includes a plurality of developer cartridges, a developer moving member and a conveying belt. Each of the developer cartridges includes a casing, a developing roller and a leakage restraining member. The peripheral surface of the developer ca... | 04/27/2010 |
| 7706715 | Image forming apparatus and developer cartridge A developer cartridge includes a developer cartridge case for accommodating a developer, a developing roller, a toner layer thickness control blade, and a side sealing member. The developing roller is supported by the developer cartridge case such that a circumferen... | 04/27/2010 |
| 7697864 | Developing device A developing device includes a housing that stores developer; a developing roll that is rotatably supported in the housing and has a developing region with a roughened surface that supplies developer to an image region of an image holding member; a step portion that... | 04/13/2010 |
| 7693447 | Developing device having improved sealing structure A developing device has a sealing unit that seals a gap between an inner wall of a housing that stores developer and a blade that controls a thickness of developer attached on a developing roller. The sealing unit of the developing device includes a first sealing me... | 04/06/2010 |
| 7680430 | Developing apparatus, process cartridge, developer cartridge, and image forming apparatus including leakage preventing member A developing agent leakage preventing member is provided that is attached to the developer housing and that has a housing attaching face which contacts with the developer housing, a front side face which opposes the housing attaching face, and two side faces each of... | 03/16/2010 |
