摘要:
An image forming apparatus and method that compute a total amount of toner to be deposited per unit area of a target image in which a first unit area is computed to form a first toner image using a highest total amount of toner, and a second unit area is computed to form a second toner image using a lowest total amount of toner. When the highest total amount of toner computed by a computing unit exceeds a given level, a transfer bias determination unit identifies a transfer bias to transfer a toner image of the target image from an overlapping portion that can effectively transfer the first toner image, and the second toner image.
摘要:
An image glossing apparatus including a recording sheet feeder feeding a recording sheet bearing a toner image; a glossing device including a heater heating a glossing portion of the toner image to gloss the portion; a glossiness information obtaining device obtaining position information on the position of the glossing portion; and a position detector including a tip detector detecting tip of the fed recording sheet, and a distance measuring device measuring the moving distance of the recording sheet after the tip of the recording sheet is detected. The position detector detects the position of a portion of the recording sheet facing the heater based on the information on the tip of the recording sheet and the information on the moving distance of the recording sheet. When the portion of the recording sheet facing the heater is the glossing portion, the heater heats the portion to gloss the glossing portion.
摘要:
An image forming system including an image forming device forming on a recording sheet a first chromatic toner image, and a second chromatic toner image having an outermost layer of transparent toner, wherein the transparent toner has lower glass transition temperature than the chromatic toners; a fixing device having a fixing member contacting the recording sheet to heat the toner images to temperature not lower than the glass transition temperature of the chromatic toners so that the toner images are fixed; and a glossing device having a glossing member contacting the recording sheet to heat the toner images to temperature not lower than the glass transition temperature of the transparent toner and lower than the glass transition temperatures of the chromatic toners so that only the transparent toner achieves a rubber state and to cool the heated first and second toner images so that the transparent toner is solidified.
摘要:
A fixing device includes a rotatable fixing member, a pressing member, a motor, and an oil applier. The pressing member contacts the fixing member. The oil applier includes an application roller and an oil supply mechanism. The application roller applies oil to one of the fixing member and the pressing member. The oil supply mechanism supplies oil to the application roller. The motor is provided independent of other drivers, and supplies a driving force to the application roller to rotate the application roller at an arbitrary speed.
摘要:
A fixing device includes a rotatable first nip formation member, a rotatable second nip formation member, and an oil applier. The second nip formation member is provided under the first nip formation member to contact the first nip formation member. The oil applier includes an oil pan, an oil receiver, and an oil filter. The oil pan is provided under the second nip formation member to contain oil in which the second nip formation member is dipped. The oil receiver holds the oil pan. The oil filter is provided between the oil pan and the oil receiver to filter oil overflowing the oil pan.
摘要:
A fixing device includes a rotatable fixing member, a pressing member, a motor, and an oil applier. The pressing member contacts the fixing member. The oil applier includes an application roller and an oil supply mechanism. The application roller applies oil to one of the fixing member and the pressing member. The oil supply mechanism supplies oil to the application roller. The motor is provided independent of other drivers, and supplies a driving force to the application roller to rotate the application roller at an arbitrary speed.
摘要:
A fixing device includes a fixing member, a pressing member, and an oil applier. In the oil applier, an oil application member applies oil supplied from an oil supply mechanism to one of the fixing member and the pressing member. In the oil supply mechanism, an oil storage member is provided above and adjacent to one of an oil supply member and the oil application member to supply oil overflowing the oil storage member, when oil is put into the oil storage member through an oil inlet, to one of the oil supply member and the oil application member. The oil supply member provided adjacent to the oil storage member supplies oil sent from the oil storage member to the oil application member.
摘要:
A fixing device, which fixes an unfixed toner image on a recording medium, includes a heating roller, a fixing roller, a pressurizing roller, and an endless belt that stretches over the heating roller and the fixing roller. A heat source and a heat pipe are arranged in a heating roller. The heat pipe substantially uniformly heats the surface of the heating roller.
摘要:
In a fixing device in which fixing defects can be suppressed and which can be reduced in size, and an image forming apparatus comprising the fixing device, setting is performed such that the surface temperature of an outer peripheral belt surface serving as a non-heated belt surface of a fixing belt is substantially equal at a heating region inlet at the upstream end of a heating region and a heating region outlet at the downstream end of the heating region such that the temperature difference between the surface temperature of the outer peripheral belt surface at the heating region inlet and the surface temperature of the outer peripheral belt surface at the heating region outlet is no more than 5 [° C.].
摘要:
In an image forming apparatus, multiple toners are superimposed, formed and layered, on a recording medium and a toner image is made. The toner that superimposed lastly on the recording medium, that is, a top layer of toner, has a toner fixing characteristic value that causes the top layer of toner to be fixed on the recording medium by lower temperature than one or all of the other multiple toners. This provides for a better fixing quality.