摘要:
A development roller includes a base unit having a base recess and a base projection formed in a predetermined area of a circumference surface of the base unit, and a surface layer formed on the circumference surface of the base unit and having a recess and a projection formed respectively in accordance with the base recess and the base projection of the base unit.
摘要:
An image forming apparatus, includes: a developer moving element that moves developer in order to transfer the developer onto a medium by rotating with the developer being borne on the developer moving element; and a collector for collecting the developer that has not been transferred onto the medium and remains on the developer moving element, the collector having a scraper blade that can abut against and separate from the developer moving element and that is for scraping off the developer on the developer moving element by abutting against the developer moving element, a sealing member that can contact with and separate from the developer moving element and that is for preventing, by contacting the developer moving element, the developer from spilling outside the collector, a ventilation opening for moving air in the collector outside the collector, and a valve for adjusting an amount of air passing through the ventilation opening, and the collector being made such that when either one of the scraper blade and the sealing member, whichever separates earlier from the developer moving element, starts separating therefrom, air can pass through the ventilation opening.
摘要:
A development roller includes a base unit having a base recess and a base projection that are formed in a predetermined area of a circumference surface of the base unit by pressing a regular pattern in pressure machining, and a surface layer formed on the circumference surface of the base unit and having a recess and a projection formed respectively in accordance with the base recess and the base projection of the base unit. A thickness of the surface layer is larger than a maximum height of a base swollen portion close to the side edge of the base projection from a regular surface of the base projection.
摘要:
A first rotary image carrier is adapted to support a toner image obtained by developing an electrostatic latent image formed thereon. A second rotary image carrier is adapted to support, on a toner supporting face thereof, the toner image which has been primarily transferred from the first rotary image carrier and is to be secondarily transferred onto a recording medium. A cleaner housing has wall members defining a housing space, a first one of which is formed with a first ventilation hole. A blade member is disposed in the housing space and configured to separatably come in contact with the second rotary image carrier to scrape off toner remaining thereon. A sealing member is disposed in the housing space and configured to separatably come in contact with the second rotary image carrier to form a closed space together with the blade member. An air duct, a part of which is formed by an outer face of at least one of the wall members of the cleaner housing, communicates with the housing space through the first ventilation hole.
摘要:
An image forming apparatus, includes: a developer moving element that moves developer in order to transfer the developer onto a medium by rotating with the developer being borne on the developer moving element; and a collector for collecting the developer that has not been transferred onto the medium and remains on the developer moving element, the collector having a scraper blade that can abut against and separate from the developer moving element and that is for scraping off the developer on the developer moving element by abutting against the developer moving element, a sealing member that can contact with and separate from the developer moving element and that is for preventing, by contacting the developer moving element, the developer from spilling outside the collector, a ventilation opening for moving air in the collector outside the collector, and a valve for adjusting an amount of air passing through the ventilation opening, and the collector being made such that when either one of the scraper blade and the sealing member, whichever separates earlier from the developer moving element, starts separating therefrom, air can pass through the ventilation opening.
摘要:
Provided is a development device including: a development roller in which continuous spiraling inclined grooves having different inclinations with respect to an axial direction are formed so as to cross each other; and a feed roller which is in contact with the development roller and feeds toner to the development roller, wherein transportation force, which is used for transporting the toner on the development roller from one side to the other side of the axial direction of the development roller, is generated by the rotation of the feed roller.
摘要:
A development roller includes a base unit having a base recess and a base projection that are formed in a predetermined area of a circumference surface of the base unit, and a surface layer formed on the circumference surface of the base unit and having on the circumference thereof a recess and a projection formed respectively in accordance with the base recess and the base projection of the base unit. Surface hardness of the projection is higher than surface hardness of the recess.
摘要:
Provided is an image forming apparatus including: a rotatable image carrier; a protective agent supplying unit supplying a protective agent to the image carrier; a first charging unit charging the image carrier to the same polarity as a regular charging polarity of a toner; a second charging unit charging the protective agent supplied to the image carrier to the opposite polarity to the regular charging polarity of the toner; an exposure unit forming an electrostatic latent image on the image carrier; a development unit developing the electrostatic latent image of the image carrier; and a transfer unit transferring the image of the image carrier, wherein the second charging unit is disposed between the protective agent supplying unit and the development unit.
摘要:
An image forming apparatus is operable to form an image on a recording medium. An image carrier is adapted such that a toner image is formed thereon by developing an electrostatic latent image. An intermediate transfer member is adapted such that the toner image is primarily transferred thereto. In a transfer device, a roller member is adapted to come in contact with the intermediate transfer member. A first bias voltage applier is operable to provide a transfer voltage, thereby applying a first bias voltage between the roller member and the intermediate transfer member to secondarily transfer the toner image onto the recording medium in order to obtain the image. A charge eliminator is disposed in the vicinity of the roller member. A second bias voltage applier is operable to apply a second bias voltage to the charge eliminator to eliminate charges on the recording medium which has been subjected to the application of the first bias voltage. A controller is operable to vary the second bias voltage in accordance a deviation amount of the first bias voltage.
摘要:
A corona charger is provided with a back plate which defines a first space which surrounds a discharge electrode while opening a side that the discharge electrode faces an image carrier. The back plate is formed with a first opening. A storage has a second space which stores waste toner generated in the image forming apparatus. The storage is formed with a second opening. A filter causes ozone to pass through but blocks toner. The filter is disposed between the corona charger and the second space. The first space and the second space are communicated by way of the first opening and the second opening.