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| Number | Title | Issue Date |
| 7899373 | Developing device and image forming apparatus A developing device using a magnetic mono-component developing agent includes a rotary sleeve that accommodates a stationary magnet, and a toner layer thickness regulating member that regulates a thickness of a toner layer formed on the rotary sleeve. The toner laye... | 03/01/2011 |
| 7362991 | Image forming apparatus An image forming apparatus having a photosensitive drum bearing an electrostatic image, and a developing sleeve carrying a developer for developing the electrostatic image, the developing sleeve is in non-contact with the photosensitive drum, and is designed to be f... | 04/22/2008 |
| 7310490 | Developing unit for an image forming apparatus A developing unit for an image forming apparatus using a two-property developer that induces a magnetic attraction force based on the slope of a curved line representing the magnetism of each magnetic pole of a magnetic field generating part of a developing roller a... | 12/18/2007 |
| 7289755 | Development apparatus, process cartridge, and image forming apparatus A development apparatus is provided and includes a developer support, a developer-controlling member, and a developer-residue controlling member. The developer support supports developer on the surface. The developer-controlling member controls the thickness of the ... | 10/30/2007 |
| 7289756 | Developer regulating member with surface roughness parameters A developer regulating member abutting against a developer carrying member carrying a mono-component developer to regulate the layer thickness of the developer on the developer carrying member has a supported portion supported by a support member, and an abutting po... | 10/30/2007 |
| 7233758 | Developing apparatus featuring a developer carrying member with an elastic surface layer A developing device includes a rotatable developer carrying member for carrying a developer to develop an electrostatic image formed on an image bearing member with the developer; non-rotatable magnetic field generating means, disposed inside the developer carrying ... | 06/19/2007 |
| 7201132 | Combustion engine of vertical shaft type To provide an internal combustion engine of a vertical shaft type, in which leakage of an oil from a crankcase and an oil pan is effectively prevented, which has high mounting rigidity relative to a working machine and, also, which is capable of being easily service... | 04/10/2007 |
| 7171145 | Developing device and process cartridge for an image forming apparatus A method of developing a latent image formed on an image carrier with toner, including causing a developer carrier, which faces the image carrier and accommodates a magnet therein, to support a developer having a toner and a magnetic carrier supporting the toner and... | 01/30/2007 |
| 7132211 | Method for developing an electrostatic latent image A magnetic toner contains, as a magnetic powder, magnetic iron oxide having an octahedral particle shape and an average particle diameter of 0.21 μm or larger and containing 18% or more by weight of FeO. The magnetic toner is so prepared as to have a bulk density A... | 11/07/2006 |
| 7116932 | Developing unit and image forming apparatus A developing unit includes a developer containing unit that contains developer, a developer carrier that has a moving surface, and carries the developer, a magnetic force generator that attracts the developer onto the moving surface by a magnetic force generated fro... | 10/03/2006 |
| 7110703 | Developing device, process cartridge and image forming apparatus A developing apparatus for an electrophotographic image forming apparatus, the developing apparatus includes a developing means for developing an electrostatic latent image formed on an electrophotographic photosensitive member; a developer accommodating container f... | 09/19/2006 |
| 7050745 | Two-component developer unit of electrophotographic image forming apparatus having lifting guide portion A two-component developer unit of an electrophotographic image forming apparatus includes a developer rectifier having a lifting guide portion and a developer collection guide portion. The lifting guide portion guides a developer agitated by an agitating unit upward... | 05/23/2006 |
| 7027760 | Developing method for an image forming apparatus and developing device using the same A developing method and apparatus of the present invention develops a latent image formed on an image carrier with a two-ingredient type developer, which consists of toner grain and carrier grains, deposited on a developer carrier in the form of a brush. A distance ... | 04/11/2006 |
| 6978109 | Image forming apparatus An electrophotographic image forming apparatus of the present invention frees images from various defects including the thinning of horizontal lines, the omission of the trailing edge of an image, background contamination, granularity particular to a halftone image,... | 12/20/2005 |
| 6978108 | Developing apparatus to control bending of a magnetic field generation unit provided inside a developer carrying member To control bending of a magnetic field generation unit provided inside a developer carrying member, a developing apparatus for developing an electrostatic image formed on an image bearing member according to the present invention includes: a developer container whic... | 12/20/2005 |
| 6954604 | Electronic photographing apparatus The invention provides an electronic photographing apparatus using a two-component developer as a mixture of a toner and a carrier as well as a development unit including a developer roll having magnetic poles therein. The electronic photographing apparatus includes... | 10/11/2005 |
| 6941090 | Developing apparatus configured to prevent splashing of toner and carrier A developing apparatus prevents or reduces splashing of toner and carrier caused by abnormal outward airflows generated at downstream positions of a developing unit casing thereof through interactions between behaviors of magnetic brushes and local portions of the d... | 09/06/2005 |
| 6925277 | Developing device using a developer carrier formed with grooves and image forming apparatus including the same A developing device of the present invention includes a developing roller including a sleeve and a magnet roller accommodated in the sleeve. The surface of the sleeve s configured such that the center portion, including an image forming range corresponding to the im... | 08/02/2005 |
| 6810222 | IMAGE FORMING APPARATUS INCLUDING AN IMAGE CARRIER, A LATENT IMAGE FORMING MEANS, AND A DEVELOPING DEVICE CAPABLE OF PREVENTING DEVELOPER FROM ESCAPING THE DEVELOPING DEVICE, AND PROCESS CARTRIDGE THEREFORE An image forming apparatus of the present invention includes a developing device including a sleeve and a magnet roller fixedly accommodated in the sleeve. The magnet roller includes a main magnetic pole and an auxiliary magnetic pole adjoining it at a downstream si... | 10/26/2004 |
| 6757509 | Image forming apparatus An electrophotographic image forming apparatus of the present invention frees images from various defects including the thinning of horizontal lines, the omission of the trailing edge an image, background contamination, granularity particular to a halftone image, ca... | 06/29/2004 |
| 6751433 | Developing device and image forming apparatus using the same A developing device for an image forming apparatus of the present invention includes a developing roller made up of a sleeve and a magnet roller and a doctor facing the surface of the sleeve. The edge of the doctor faces the sleeve at a particular position selected ... | 06/15/2004 |
| 6728504 | Developing device using a magnet brush and image forming apparatus including the same A developing device of the present invention includes an image carrier for forming a latent image thereon, and a developer carrier for depositing a developer thereon in the form of a magnet brush. The magnet brush is caused to contact the latent image to thereby dev... | 04/27/2004 |
| 6704534 | Developing device having minimum magnetic field strength adjacent regulating member A developing device includes a developing container for containing therein a developer provided with a carrier and a toner, a conveying device for conveying the developer in the developing container, a developer bearing member for bearing thereon the deve... | 03/09/2004 |
| 6526247 | Electrostatic image developing process with optimized setpoints The invention relates generally to processes for electrostatic image development, and setpoints that provide uniform image development. In particular, an apparatus and process having a magnetic brush that implements hard carriers and a rotating magnetic c... | 02/25/2003 |
| 6473586 | Developing unit and image forming apparatus using the same In a two-component developing unit, by devising the layout of magnetic poles 6 (particularly a pickup magnetic pole 6b and a trimming magnetic pole 6c) of a magnet member 5 arranged inside a developer carrier 3, an excess portion of a developer G picked u... | 10/29/2002 |
| 6081684 | Method and apparatus for image forming capable of performing an improved circulation of developer An image forming method for improving developer recirculation capability within a developer unit includes the steps of magnetically adsorbing a developer having magnetism onto a developer carrier by the action of a magnetic field generated by a magnetic f... | 06/27/2000 |
| 6067433 | Developing apparatus for regulating the amount of developer in the vicinity of repulsive magnetic pole A developing apparatus includes a developer bearing member, a first magnetic pole and a second magnetic pole of a same polarity as that of the first magnetic pole, and a regulating member. A regulating portion of the regulating member is provided within a... | 05/23/2000 |
| 6041207 | Apparatus for controlling the movement of magnetized developer material in a latent, electrostatic image developing deviced For realizing a satisfactory and stable developing process, the charge state of a developer and the density of toner particles contained in the developer is kept constant in the developing process. A developing roller to be driven rotationally is provided... | 03/21/2000 |
| 6021295 | Developing apparatus A developing apparatus employing a three-pole stationary magnetic roller for use with a uni-component magnetic developer or toner. The apparatus includes a rotational sleeve which accommodates the stationary roller, a mixer disposed in a toner vessel for ... | 02/01/2000 |
| 5991586 | Developing device including a magnetic regulating member A developing device which regulates the amount of developer transported on a developing sleeve via a regulating member constructed as a magnetic member, so as to not have large fluctuation in the amount of developer transported by a developing sleeve to a... | 11/23/1999 |
| 5860049 | Developing apparatus and picture image forming apparatus By employing a developer using ferrite system carriers, a developing process can be carried out using a low brushing force by a magnetic portion having the same polarity in a developing unit in a developing roller. A relationship between a circumferential... | 01/12/1999 |
| 5828936 | Developing device A developing device is provided with a magnetic member having a plurality of magnetic poles N and S within a developing sleeve that rotates to transport a developer to an image bearing member. The device also includes a regulating member, which is formed ... | 10/27/1998 |
| 5781836 | Developing device having regualting rotary member for regulating toner amount A developing device for an image forming apparatus such as a copying machine, a printer, or the like to develop an electrostatic latent image on an image carrier includes a toner carrier which moves while carrying a toner on its surface, and a regulating ... | 07/14/1998 |
| 5781835 | Developing device comprising a magnetic member A developing device includes a developer container for accommodating one component magnetic toner; a rotatable toner carrying member, faced to an image bearing member for bearing an electrostatic image to form a developing zone therebetween, for carrying ... | 07/14/1998 |
| 5768667 | Developer roll magnet for toner cartridge An improved developer roll magnet for a toner cartridge provides a strip of magnetic material that extends axially along a surface of the developer roll magnet located coaxially within a developer roll sleeve. The strip of magnetic material can be seated ... | 06/16/1998 |
| 5765080 | Magnetic development zone toner supply enhancement A method and apparatus for delivering a uniform supply of toner to a development zone in an electrostatographic system is disclosed. Additional toner control in the form of magnets located near the donor member attract toner to the toner pick-up area and ... | 06/09/1998 |
| 5758241 | Developing device for an image forming apparatus A developing device for an image forming apparatus and of the type using a developer consisting of toner and magnetic particles is disclosed. While a developing sleeve conveys the developer deposited thereon, toner is automatically replenished to the deve... | 05/26/1998 |
| 5754929 | Development apparatus A development apparatus having a development sleeve for carrying and transporting a magnetic developer, a regulating roll for controlling the thickness of a layer of the developer on the development sleeve, a first magnetic pole provided in the developmen... | 05/19/1998 |
| 5606404 | Toner development station with non-conductive skive A development station for applying dry toner to an image member includes a rotatable magnetic core and an input skive to determine the height of the developer nap on a shell surrounding the core. Toner flakes showing up in the toner application on the ima... | 02/25/1997 |
| 5529628 | Developing unit A developing roll includes a tubular sleeve driven for turn, and a magnet roll fixedly supported. An intensively magnetized block, shaped like U in cross section, is buried in the magnet roll at a location thereof where the magnet roll faces the latent el... | 06/25/1996 |
