摘要:
An image forming and recording apparatus, having a fixing apparatus for fixing unfixed toner image on a recording medium, wherein the fixing apparatus includes a fixing roller integrating a heater therein, an endless belt wound around the fixing roller, and three pressure members for pressing the endless belt onto the fixing roller. A pressure member located nearest to a side of entry of paper among the three pressure members is made up with a non-rotary type pressure member, and other two pressure members are made up with either one of a rotary type pressure member and the non-rotary type pressure member.
摘要:
A fixing device in an image formation apparatus has a heating roller and a backup roller. These rollers are each coated with single silicone rubber layers around the respective peripheries of their core bars. This silicone rubber has a volume resistance value of 1013 &OHgr;·cm or more. The heating roller is charged with electricity of the same polarity as the polarity of toner particles due to frictional electrification caused at the time of feeding of a recording medium. The heating and the backup roller are polarized reverse to the polarity of the recording medium. A quantity of charged electricity on the backup roller is made larger than that on the heating roller. This permits the image formation apparatus to prevent offset from occurring at the time of fixing a toner image onto the recording medium to cope with various types of recording media.
摘要:
A fixing device includes a roller; an endless belt which is in contact with the roller and rotates with a circulation of the roller in a follower manner; a heating source in at lease one of an inside of the roller and an inside of the endless belt; and a pressure-applying member which is inside the endless belt and presses the endless belt against the roller. A sliding layer is provided on a side on which the pressure-applying member is in contact with the endless belt, and the sliding layer comprises at least two layers and holds a lubricant.
摘要:
A fixing device includes a roller; an endless belt which is in contact with the roller and rotates with a circulation of the roller in a follower manner; a heating source in at lease one of an inside of the roller and an inside of the endless belt; and a pressure-applying member which is inside the endless belt and presses the endless belt against the roller. A sliding layer is provided on a side on which the pressure-applying member is in contact with the endless belt, and the sliding layer comprises at least two layers and holds a lubricant.
摘要:
A fixing device includes a first fixing part having a heater disposed therein, a second fixing part, disposed to oppose to the first fixing part, for pinching a recording medium to form a first nip portion, a pair of transfer rollers, disposed at a downstream side of the recording medium, for forming a second nip portion, a guide for biasing the recording medium discharged from the transfer rollers towards the first fixing part side from one of the transfers rollers, and means part for biasing the guide towards the recording medium side.
摘要:
A ratio of a radius of curvature of a pressure applying member with an elastic layer, which pushes an endless belt wound around an endless heating member with pressure, in a transferring direction to a radius of curvature of an outer diameter of the heating roller is set to 1.1 or more.
摘要:
An electro-photographic apparatus for conducting printing includes a fixing member fixing an unfixed toner image on a surface of a recording medium onto the recording medium. The fixing member includes a heating roller and a pressurizing member, and a mounting member on which the pressurizing member is mounted. The pressurizing member is supported by the mounting member in a substantially center part in a longitudinal direction of the pressurizing member.
摘要:
A ratio of a radius of curvature of a pressure applying member with an elastic layer, which pushes an endless belt wound around an endless heating member with pressure, in a transferring direction to a radius of curvature of an outer diameter of the heating roller is set to 1.1 or more.
摘要:
An electro-photographic apparatus for conducting printing includes a fixing member fixing an unfixed toner image on a surface of a recording medium onto the recording medium. The fixing member includes a heating roller and a pressurizing member, and a mounting member on which the pressurizing member is mounted. The pressurizing member is supported by the mounting member in a substantially center part in a longitudinal direction of the pressurizing member.
摘要:
A fixing device comprising a first fixing means having a heating means disposed therein, a second fixing means, disposed to oppose to the first fixing means, for pinching a recording medium to form a first nip portion, a pair of transfer rollers, disposed at a downstream side of the recording medium, for forming a second nip portion, a guide for biasing the recording medium discharged from the transfer rollers towards the first fixing means side from one of the transfers, and means for biasing the guide towards the recording medium side.