Class / Patent application number | Description | Number of patent applications / Date published |
399273000 | Unloading (e.g., scraper) | 18 |
20080205941 | DEVELOPMENT APPARATUS AND IMAGE FORMING APPARATUS - A development apparatus that performs development by forming a magnetic brush using a two-component developer is provided with a developer tank that stores developer; a developer hearing member provided with a development sleeve that carries the developer stored in the developer tank on the outer circumferential face and transports the developer to a development area where the electrostatic latent image on the image bearing carrier is developed, the development sleeve being provided with at least a main pole magnet in which a main pole is formed that faces the development area, and an interpole magnet in which an interpole is formed adjacent to the main pole on the downstream side in a developer transport direction; and a carrier recovery means in which a pushing/bending magnetic pole of the same polarity as the interpole is formed such that magnetic force lines of the interpole in the developer bearing member are pushed/bent to the inside of the developer tank. | 08-28-2008 |
20080292364 | IMAGE FORMING APPARATUS, DEVELOPING APPARATUS AND DEVELOPING ROLLER FOR THE IMAGE FORMING APPARATUS - A developing apparatus usable with an image forming apparatus may include a magnetic roller having disposed therein at least one magnet, and a developing roller rotatably disposed to face the magnetic roller and having a magnetic portion to contain a magnetic material that can be magnetized by a magnet of the at least one magnet disposed nearest to the developing roller. | 11-27-2008 |
20090003887 | SELF-CLEANING ELECTROPHOTOGRAPHIC TONING ROLLER SYSTEM - An apparatus and related method for a self-cleaning toner roller device adjacent a toner roller. The cleaning device having one or more shields to capture the toner debris from the toner roller, a toner debris receptacle to collect the toner debris, and a controller to move the applicator from an operational mode to a self-cleaning mode. | 01-01-2009 |
20090067890 | Image forming apparatus - Provided are a developing device and an image forming apparatus, the developing device which employs a two-component developer wherein development hysteresis (ghost) is reduced and deterioration of a carrier is stably suppressed, and high-quality images are thus realized for a long period of time. The developing device, which uses a developer including toner, carrier and reverse polarity particles which are charged to have a polarity reverse to that of the toner, performs a collecting operation for collecting the reverse polarity particles at a timing in which image formation is not affected by a collecting operation, where the reverse polarity particles are accumulated in the area enclosed by a toner carrying member, a developer carrying member for toner supply and developer carrying member for collecting toner are collected into a developer container. | 03-12-2009 |
20090116878 | COLOR SWITCHING ARCHITECTURE - A developer unit for a color imaging system includes a housing, a developer roll, and a magnetic stripping roll. The housing defines a chamber for holding developer material, which includes toner particles. The developer roll is mounted in the housing and rotates to attract developer material to flow on its surface. The developer roll carries the developer material into proximity to a latent image to create a toner image. The magnetic stripping roll is mounted in the housing and rotates between a functional and a non-functional position in proximity to the developer roll to strip developer material from the surface of the developer roll, cleaning the developer roll. The magnetic stripping rolls may include a magnet assembly with a functional position for activating the magnetic stripping roll and a non-functional position for deactivating the magnetic stripping roll. The magnetic stripping roll may be mounted to shift between two positions. | 05-07-2009 |
20090169269 | Developing unit, developing device and image forming apparatus - A developing unit includes: a developer carrying member that visualizes an electrostatic latent image held on an image carrying member using magnetic developer; a peeling member that peels off the magnetic developer held on the developer carrying member by a magnetic force; and a movement controller that controls movement of the peeling member, when the peeling member peels off the magnetic developer, the movement controller moving the peeling member to a position close to the developer carrying member, and when the peeling member has peeled off the magnetic developer, the movement controller moving the peeling member to a position away from the developer carrying member. | 07-02-2009 |
20100303510 | DEVELOPING DEVICE HAVING TONER RECOVERY TRAY AND IMAGE FORMING APPARATUS - A developing device includes: a developing housing having a developer accommodating chamber; a developer bearing member which is supported rotatably inside a developing housing, and which holds on a circumferential surface thereof a two-component developer composed of a magnetic carrier and toner; a toner bearing member which is supported rotatably with respect to the developer bearing member inside the developing housing, and to which the toner in the developer held on the developer bearing member adheres electrostatically; and a toner recovery tray which has an opening in an upper end thereof, and which is installed removably in the developing housing below the developer bearing member and the toner bearing member. | 12-02-2010 |
20110052270 | DEVELOPING DEVICE AND IMAGE-FORMING APPARATUS PROVIDED THEREWITH - A developing device includes a developing container for accommodating a two-component developer; a developer bearing member for bearing and conveying the developer, a fixed magnet including a release pole for releasing the developer from the developer bearing member, being fixed to the inside of the developer bearing member; and a backflow prevention member that is a sheet-shaped member disposed along the entire length in the longitudinal direction of the developer bearing member so as to be upstream in the direction of rotation of the developer bearing member as viewed from the release pole, the backflow prevention member being disposed so that a proximal end portion thereof is fixed to an inside surface of the developing container, and a distal end portion thereof is in contact with or adjacent to the developer bearing member and facing downstream in the direction of rotation of the developer bearing member. | 03-03-2011 |
20110123234 | DEVELOPING DEVICE, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE - A developing system includes a first developer carrier to carry and supply two-component developer including toner and carrier to a latent image formed on an image bearer. A first magnetic field generator having plural first magnetic poles is rotatably installed in the first developer carrier and causes the two-component developer to put forth ears and conveys the two-component developer on the developer carrier. A cross-sectional center of the first magnetic field generator is deviated from that of the first developer carrier toward the image bearer by a prescribed length. A developer peel-off device including a second magnetic field generator is provided in the vicinity of the surface of the first developer carrier to peel off the developer not supplied to the image bearer and remaining on the surface of the first developer carrier. | 05-26-2011 |
20110158702 | ALTERNATE SCAVENGER GEOMETRY THAT PROMOTES CARRIER RETURN BACK INTO THE DEVELOPMENT STATION - A method for recirculating carrier back into a printer developer station by forming a horizontal slot in the face of the scavenger electrode. The carrier is urged through the slot and into the developer station by magnetic force to prevent the build up of carrier on the scavenger. | 06-30-2011 |
20110176840 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS PROVIDED THEREWITH - A developing device includes: a developing roller incorporating a fixed magnet body having a plurality of magnetic poles in a circumferential direction; a regulating member for regulating an amount of toner on the developing roller by means of a magnetic field formed by the regulating member and the fixed magnet body; and a magnetic-field generating member for scraping off, on an upstream of the regulating member in a rotational direction of the developing roller, toner which is not used for development on the developing roller. A relation Bm/Br>1 is satisfied, where Br represents a magnetic flux density of a distal end portion of the regulating member facing a surface of the developing roller and Bm represents a magnetic flux density of a distal end portion of the magnetic-field generating member facing the surface of the developing roller. | 07-21-2011 |
20110222919 | DEVELOPING UNIT AND IMAGE FORMING APPARATUS USING SAME - A developing unit includes: a cylindrical magnetic member having plural magnetic poles in a circumferential direction, the magnetic poles including a first pole attracting developer and a second pole not attracting developer; a developer holding member having the cylindrical magnetic member therein and conveying developer magnetically attracted by the cylindrical magnetic member on a surface thereof in a direction toward a predetermined area where developer is not attracted by a magnetic field caused by the second pole; a peeling member provided in the predetermined area and peeling off the developer attracted at an end portion of the developer holding member in an axial direction; and a second magnetic member provided on at least one of upstream and downstream in the direction from the peeling member, disposed in a position with a gap from the surface of the developer holding member and opposed to the predetermined area. | 09-15-2011 |
20120003015 | PRINTING JOB WITH DEVELOPER REMOVAL - A printer includes a development member for providing toner to a photoreceptor. A developer remover is located between a developer supply and the photoreceptor in the direction of rotation of the development member, and selectively contacts the development member to remove developer therefrom. A controller receives a print job, determines a non-developing zone of the development member corresponding to the non-image area of the job, and determines a developing zone of the development member corresponding to the image area of the job. The developer remover removes developer when it is in the non-developing zone, but not when it is in the developing zone. | 01-05-2012 |
20120027470 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A developing device | 02-02-2012 |
20120070198 | METHOD OF IMPLEMENTING A MAGNETICALLY ACTUATED FLAP SEAL - A method for removing carrier buildup in a slotted scavenger electrode in a printer comprising magnetically attracting the carrier toward the slot, blocking the slot with a movable flap for preventing toner dust from traveling through the slot, opening the movable flap for allowing the carrier to travel through the slot and return to the developer station, then reclosing the movable flap. | 03-22-2012 |
20120070199 | MAGNETICALLY ACTUATED FLAP SEAL - A printer comprising a developer station for holding a supply of carrier particles, a rotating member which accumulates carrier particles during its rotation, a scavenger for removing the accumulated particles from the rotating member during the rotation. The scavenger includes a slot through which the carrier particles travel to return to the developer station and a movable flap covering an opening of the slot for accumulating the carrier particles at the flap until the flap is opened. A source of magnetic field urges the carrier particles through the slot. The carrier particles accumulate at the flap until reaching a volume sufficient to force open the movable flap and fall into the developer station. | 03-22-2012 |
20130272751 | IMAGE FORMING APPARATUS - An image forming apparatus includes a controller that controls rotational driving of a magnetic roller and rotational driving of a developing roller. The controller is capable of performing a toner collecting mode when no image formation is performed. In the toner collecting mode, the magnetic roller and the developing roller are intermittently rotated in a direction reverse to a direction in which the magnetic roller and the developing roller are rotated during image formation, then the magnetic roller is made to rotate in a forward direction, and then, the magnetic roller is rotated in a backward direction. | 10-17-2013 |
20160091826 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A collection roller and a developing sleeve rotate in the same direction at proximal portions thereof. A distal end of a magnetic brush formed of developer born on a surface of the developing sleeve by an importing magnetic pole of a magnet roller is set so as to make contact with the surface of the collection roller. A first gap is set between the collection roller and the developer-bearing region of the developing sleeve and a second gap larger than the first gap is set between the collection roller and the non-developer-bearing region of the developing sleeve. | 03-31-2016 |