摘要:
A developing unit circulates a developer unidirectionally and includes a developer carrier having a magnetic field generator therein. The developing unit further includes a supply part housing a supply screw, a collecting part housing a collecting screw, an agitation part housing an agitation screw, a first opening, a second opening, and a third opening. The developer is transported by the supply screw, the collecting screw, and the agitation screw from the collecting screw to the agitation screw through the first opening, from the agitation screw to the supply screw through the second opening, and from the supply screw to the collecting screw though the third opening in a developer circulation. A height of a bottom surface of the downstream part of the agitation screw is higher than a height of a bottom surface of the supply screw.
摘要:
A developing unit circulates a developer unidirectionally and includes a developer carrier having a magnetic field generator therein. The developing unit further includes a supply part housing a supply screw, a collecting part housing a collecting screw, an agitation part housing an agitation screw, a first opening, a second opening, and a third opening. The developer is transported by the supply screw, the collecting screw, and the agitation screw from the collecting screw to the agitation screw through the first opening, from the agitation screw to the supply screw through the second opening, and from the supply screw to the collecting screw though the third opening in a developer circulation. A height of a bottom surface of the downstream part of the agitation screw is higher than a height of a bottom surface of the supply screw.
摘要:
An image forming method and apparatus includes a first image carrying member, a first transfix unit, a second image carrying member, and a second transfix unit. The first image carrying member carries a first toner image thereon. The first transfix unit receives the first toner image from the first image carrying member and transfers and fixes the first toner image onto a first face of a recording sheet with a heat effect. The second image carrying member carries a second toner image thereon. The second transfix unit receives the second toner image from the second image carrying member and transfers and fixes the second toner image onto a second face of the recording sheet with a heat effect.
摘要:
A developing device includes a developer bearing member, a developer supplying conveyer, a developer receiving conveyer and a developer agitating conveyer. The developer supplying conveyer or the developer receiving conveyer has at least one dividing position. The dividing position is a position at which the conveying direction of the developer reverses, and a position which is arranged so that if the dividing position is projected to the developer bearing member along a plane which is perpendicular to the widthwise direction of the developer bearing member, the projected position on the developer bearing member is within an area in which the developer is borne on the developer bearing member.
摘要:
A developing device includes a developer bearing member, a developer supplying conveyer, a developer receiving conveyer and a developer agitating conveyer. The developer supplying conveyer or the developer receiving conveyer has at least one dividing position. The dividing position is a position at which the conveying direction of the developer reverses, and a position which is arranged so that if the dividing position is projected to the developer bearing member along a plane which is perpendicular to the widthwise direction of the developer bearing member, the projected position on the developer bearing member is within an area in which the developer is borne on the developer bearing member.
摘要:
An image forming method and apparatus includes a first image carrying member, a first transfix unit, a second image carrying member, and a second transfix unit. The first image carrying member carries a first toner image thereon. The first transfix unit receives the first toner image from the first image carrying member and transfers and fixes the first toner image onto a first face of a recording sheet with a heat effect. The second image carrying member carries a second toner image thereon. The second transfix unit receives the second toner image from the second image carrying member and transfers and fixes the second toner image onto a second face of the recording sheet with a heat effect.
摘要:
An image forming apparatus for recording on two sides in a single pass, with which the transfer of a toner image onto one side of a recording medium and the transfer of a toner image onto the other side can both be performed under optimal conditions, which results in an increase in image quality. Contact-type transfer rollers are used as secondary and tertiary transfer means, so unlike with a transfer charger (a non-contact type of transfer means), there is no discharge product. A toner image that has been once transferred from an image support onto a recording medium is prevented from being retransferred back onto the image support, and a toner image that has been transferred onto the recording medium by the action of a first transfer member is prevented from being retransferred to the image support when a toner image is transferred onto the recording medium by the action of a second transfer member.
摘要:
An image forming apparatus for recording on two sides in a single pass, with which the transfer of a toner image onto one side of a recording medium and the transfer of a toner image onto the other side can both be performed under optimal conditions, which results in an increase in image quality. Contact-type transfer rollers are used as secondary and tertiary transfer means, so unlike with a transfer charger (a non-contact type of transfer means), there is no discharge product. A toner image that has been once transferred from an image support onto a recording medium is prevented from being retransferred back onto the image support, and a toner image that has been transferred onto the recording medium by the action of a first transfer member is prevented from being retransferred to the image support when a toner image is transferred onto the recording medium by the action of a second transfer member.
摘要:
An image forming method of the present invention begins with a first image transfer step for thermally transferring a first toner image from a first image carrier to a second image carrier contacting it. Subsequently, in a second image transfer step, the first toner image carried on the second image carrier and a second toner image newly formed on the first image carrier are thermally transferred to opposite sides of a recording medium substantially at the same time. Higher image transfer temperature is assigned to the second image transfer step than to the first image transfer step.
摘要:
Disclosed is an image forming apparatus capable of elongating the service life of an intermediate transfer belt and of performing cleaning on the intermediate transfer belt in a satisfactory manner. To remove any residual toner on a second intermediate transfer belt, a cleaning blade is brought into contact with the second intermediate transfer belt, and a voltage is applied to the cleaning blade to thereby remove the residual toner and paper powder. In the case of one-side copying and when no residual toner exists on the second intermediate transfer belt, the cleaning blade is brought into contact with the second intermediate transfer belt to thereby remove paper powder.