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Ichikawa, Ebina-Shi

Hideo Ichikawa, Ebina-Shi JP

Patent application numberDescriptionPublished
20090129821CONVEYOR, DEVELOPER CARTRIDGE, AND FILLING METHOD - A conveyor includes a rotation shaft and a plurality of convey members provided along an axial direction of the rotation shaft, wherein at least one part of the plurality of convey members is an arc convey member that includes: an arc part having an outer periphery that forms an arc forming a part of a spiral so that an angle between two perpendiculars extended from two ends of the arc is smaller than 360°; and a support part that supports the arc part, with the outer periphery of the arc part inclined to the axial direction of the rotation shaft.05-21-2009
20090129827DEVELOPER STORAGE CONTAINER AND IMAGE FORMING APPARATUS USING THE SAME - A developer storage container includes a container body, an opening formed in the container body, an opening-and-closing cover, a cover holding frame that holds the cover so that the cover is movable between opening and closing positions, a protrusion portion, a blocking portion and a position regulating protrusion. When the opening-and-closing cover moves in the opening-and-closing direction toward the opening position and reaches a certain intermediate position, the blocking portion contacts with the protrusion portion. When the opening-and-closing cover moves from a position where the protrusion portion and the blocking portion are in contact with each other to the closing position, the position regulating protrusion causes the opening-and-closing cover to move in a intersecting direction and regulates a position of the opening-and-closing cover in the intersecting direction so that the blocking portion is overlapped, along the opening-and-closing direction, with the position of the distal end of the protrusion portion.05-21-2009
20090136266DEVELOPER CONTAINER AND METHOD FOR FILLING THE SAME - A developer container includes: a container chamber that has a container space for containing a developer; and an conveyance member having a rotation shaft and a spiral member and which rotates inside the container space about the rotation shaft, the spiral member being spirally extended to hold a first angle to an axial direction of the rotation shaft, and the spiral member being provided with a plurality of low-angle portions, wherein at least one of the low-angle portions is provided in each unit segment which is equivalent to one turn of the spiral member about the rotation shaft, and an amount of a developer contained in the container space is enough to constantly bury any of the plurality of low-angle portions in the developer under a condition that the axial direction of the rotation shaft is held to be horizontal inside the container space.05-28-2009
20100008698DEVELOPER STORAGE CONTAINER AND IMAGE FORMING APPARATUS USING THE SAME - A developer storage container includes a container body, an opening formed in the container body, an opening-and-closing cover, a cover holding frame that holds the cover so that the cover is movable between opening and closing positions, a protrusion portion, a blocking portion and a position regulating protrusion. When the opening-and-closing cover moves in the opening-and-closing direction toward the opening position and reaches a certain intermediate position, the blocking portion contacts with the protrusion portion. When the opening-and-closing cover moves from a position where the protrusion portion and the blocking portion are in contact with each other to the closing position, the position regulating protrusion causes the opening-and-closing cover to move in a intersecting direction and regulates a position of the opening-and-closing cover in the intersecting direction so that the blocking portion is overlapped, along the opening-and-closing direction, with the position of the distal end of the protrusion portion.01-14-2010
20110002714CONVEYANCE MEMBER, DEVELOPER CARTRIDGE, AND IMAGE-FORMING APPARATUS - A conveyance member includes: a rotational shaft; a support portion that extends from the rotational shaft in a direction crossing an axial direction of the rotational shaft; and an arcuate member that includes one end that is supported by the support portion, and another end that extends in a direction different from the rotational direction, wherein a distance between an outer edge of the arcuate member at the other end and the rotational shaft is longer than a distance between an outer edge of the arcuate member at the one end and the rotational shaft.01-06-2011

Patent applications by Hideo Ichikawa, Ebina-Shi JP

Junichi Ichikawa, Ebina-Shi JP

Patent application numberDescriptionPublished
20090238589Image Forming Apparatus and Method of Controlling Toner Supply - The image forming apparatus includes: a photoconductor including a photoconductive layer and an overcoat layer containing electroconductive particles; a charging unit charging the photoconductor to first potential; an exposure unit setting an exposure region to have second potential smaller than the first potential in absolute values; a development unit including a developer carrier and a power supply setting the developer carrier to have third potential; a potential setting unit setting the third potential smaller than the first potential and larger than the second potential in a first image forming operation, and setting it larger than the first potential in a second image forming operation, in absolute values; a current setting unit setting an inflowing current to a fixed current value in the second image forming operation; a detection unit detecting image density in the second image forming operation; and a controller controlling toner supply according to the image density.09-24-2009
20110064492FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes: a belt member provided to be circularly movable; a first fixing member disposed inside the belt member; a second fixing member that is disposed to be in press contact with the first fixing member across the belt member, and forms a press contact portion between the belt member and the second fixing member; a pressing member that presses the belt member against the second fixing member, the pressing member having a pressing surface that presses an inner peripheral surface of the belt member on a downstream side of the press contact portion in a moving direction of the belt member; and a suppressing unit that suppresses looseness in a portion of the belt member in the width direction thereof, the portion being located on the downstream side of the press contact portion and an upstream side of the pressing surface in the moving direction of the belt member.03-17-2011

Yoshihiko Ichikawa, Ebina-Shi JP

Patent application numberDescriptionPublished
20090092430SHEET CARRYING UNIT AND SHEET COOLING DEVICE USING THE SAME, AND IMAGE FORMING APPARATUS - A sheet carrying unit, includes: a first belt stretched by a plurality of rollers, the first belt carrying a sheet while putting the sheet on a surface of the first belt; a first driving roller that drives the first belt; a second belt stretched by a plurality of rollers, the second belt carrying the sheet while holding the sheet together with the first belt; and a second driving roller that drives the second belt; wherein a frictional force generated between the second driving roller and the second belt is set smaller than a frictional force generated between the first belt and the first driving roller, a frictional force generated between the first belt and the sheet, and a frictional force generated between the second belt and the sheet, respectively.04-09-2009
20090103959RECORDING MATERIAL COOLING APPARATUS, AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A recording material cooling apparatus includes: a cooling belt that is in contact with a toner-image surface of a recording material on which a toner image is heated by a fixing device to be in a fusing state, to cool the recording material while conveying the recording material; and an air blowing unit that blows air toward the toner-image surface of the recording material which is between the fixing device and the cooling belt, the toner-image surface being in the fusing state, or an air sucking unit that sucks air from the toner-image surface.04-23-2009