摘要:
In a monochromatic print mode, an abutting timing on when a secondary transfer roller abuts on an intermediate transfer belt is different from the timing in a color print mode. Specifically, in the monochromatic print mode, the secondary transfer roller abuts on the intermediate transfer belt prior to the start of an exposure process for the first image. Then, the secondary transfer roller is separated from the intermediate transfer belt at completion of the secondary transfer of the final image. Therefore, the secondary transfer roller has already abutted on the intermediate transfer belt at the start of the irradiation of a light beam for forming the first electrostatic latent image. The exposure process is performed with the secondary transfer roller kept abutting on the intermediate transfer belt.
摘要:
An electrostatic latent image is formed on an image carrier. A developing roller is separatably abutted on the image carrier at a developing position to supply toner onto the image carrier to make the latent image visible as a toner image. The toner image is transferred onto a transfer member. A cleaner is abutted on the image carrier to remove toner remained thereon. A toner supplier supplies toner onto the image carrier while the developing roller is separated from the image carrier.
摘要:
An electrostatic latent image is formed on a rotary image carrier. A developer is provided with at least one developing roller which is separatably abutted on the image carrier at a developing position to supply toner onto the image carrier to make the latent image visible as a toner image. An intermediate transfer member is adapted to temporarily hold the toner image. A transferer applies a transfer bias to primarily transfer the toner image on the image carrier to the intermediate transfer member. A first cleaner is always abutted on the image carrier to remove toner remaining thereon. A second cleaner is separatably abutted on the intermediate transfer member to remove toner remaining thereon. The toner image includes a first toner image which is not to be transferred onto the recording medium and a second toner image which is to be secondarily transferred onto a recording medium. The second cleaner is separated from the intermediate transfer member so as to avoid the first toner image.
摘要:
A circulating intermediate transfer member contacts an image carrier at a primary transfer position at which a toner image is transferred onto the intermediate transfer member. A secondary transfer member contacts the intermediate transfer member at a secondary transfer position at which the toner image is transferred onto a recording medium. A gate roller pair nips the recording medium therebetween at a nipping position and conveys the recording medium toward the secondary transfer position. A cleaning blade retractably contacts and scrapes off toner remaining on the intermediate transfer member. A conveyance speed of the recording medium at the nipping position is faster than that at the secondary transfer position. The cleaning blade is retracted from the intermediate transfer member until a trailing end of the recording medium passes through the nipping position, when the recording medium has a stiffness greater than a prescribed level.
摘要:
An image carrier is adapted to support a toner image thereon. A circulating intermediate transfer member is brought into contact with the image carrier to form a primary transfer position at which the toner image is transferred onto the intermediate transfer member. A secondary transfer member is brought into contact with the intermediate transfer member to form a secondary transfer position at which the toner image on the intermediate transfer member is transferred onto a recording medium passing therebetween. A gate roller pair is adapted to nip the recording medium therebetween at a nipping position and to convey the nipped recording medium toward the secondary transfer position. A cleaning blade is retractably brought into contact with the intermediate transfer roller to scrape off toner remaining on the intermediate transfer roller. A conveyance speed of the recording medium at the nipping position is faster than that at the secondary transfer position. The cleaning blade is retracted from the intermediate transfer member until when a trailing end of the recording medium passes through the nipping position, in a case where the recording medium has a stiffness greater than a prescribed level.
摘要:
In a monochromatic print mode, an abutting timing on when a secondary transfer roller abuts on an intermediate transfer belt is different from the timing in a color print mode. Specifically, in the monochromatic print mode, the secondary transfer roller abuts on the intermediate transfer belt prior to the start of an exposure process for the first image. Then, the secondary transfer roller is separated from the intermediate transfer belt at completion of the secondary transfer of the final image. Therefore, the secondary transfer roller has already abutted on the intermediate transfer belt at the start of the irradiation of a light beam for forming the first electrostatic latent image. The exposure process is performed with the secondary transfer roller kept abutting on the intermediate transfer belt.
摘要:
An electrostatic latent image is formed on a rotary image carrier. A developer is provided with at least one developing roller which is separatably abutted on the image carrier at a developing position to supply toner onto the image carrier to make the latent image visible as a toner image. An intermediate transfer member is adapted to temporarily hold the toner image. A transferer applies a transfer bias to primarily transfer the toner image on the image carrier to the intermediate transfer member. A first cleaner is always abutted on the image carrier to remove toner remaining thereon. A second cleaner is separatably abutted on the intermediate transfer member to remove toner remaining thereon. The toner image includes a first toner image which is not to be transferred onto the recording medium and a second toner image which is to be secondarily transferred onto a recording medium. The second cleaner is separated from the intermediate transfer member so as to avoid the first toner image.
摘要:
An electrostatic latent image is formed on an image carrier. A developing roller is separatably abutted on the image carder at a developing position to supply toner onto the image carrier to make the latent image visible as a toner image. The toner image is transferred onto a transfer member. A cleaner is abutted on the image carrier to remove toner remained thereon. A toner supplier supplies toner onto the image carrier while the developing roller is separated from the image carrier.
摘要:
An image forming apparatus and method that repeats image create/transfer processing, in which serial processing of forming a toner image on a photosensitive member while rotating the photosensitive member and a transfer medium in a sub scanning direction and thereafter transferring the toner image onto the transfer medium, for a plurality of toner colors which are different from each other. The apparatus and method lay toner images in the respective toner colors over each other on said transfer medium and accordingly form a color image. Correcting transfer start positions of toner images in at least one or more toner colors out of the plurality of toner colors is based on a registration control amount which is necessary to correct relative registration deviations among toner images on the transfer medium.
摘要:
Power transmission members (91), which transmit rotational drive force from a drive source (81), such as a motor, to an intermediate transfer drum (41D) is elastically deformed due to a load change which is generated as a cleaning part (49) contacts and moves away from the intermediate transfer drum (41D). Registration control amounts (Ra, Rb and Rc) attributed to the elastic deformation are obtained in advance. Transfer start positions for toner images in at least one or more toner colors out of four toner colors are corrected based on the registration control amounts (Ra, Rb and Rc), whereby registration deviations are suppressed to minimum and a high-quality color image is obtained.