Abstract:
A lubricating device operable to lubricate a moving imaging surface subsequent to removal of residual toner by a cleaning device includes a lubricant applicator, a metering blade, and a priming agent. The lubricant applicator is located downstream of the cleaning device in a direction of movement of the imaging surface, and applies lubricant to the imaging surface. The metering blade is located downstream of the lubricant applicator in the direction of movement of the imaging surface, and spreads the applied lubricant into a thin layer by directly contacting the imaging surface. The priming agent is prepared by mixing a lubricant and a powder, and provided, prior to initial operation, on the lubricant applicator for application to the imaging surface upon startup.
Abstract:
An image forming apparatus includes an image bearing member, a charging device to apply a charging bias, a developing device to develop a latent electrostatic image with toner, a transfer device to transfer the toner image to a recording medium, a fixing device to fix the toner image on the recording medium, an image formation speed switching device to switch from one image formation speed to another speed, a storage device to store a charging current target of the charging bias for each image formation speed, an electric current detection device to detect electric current flown through the charging device, and an AC voltage adjustment device to adjust AC voltage of the charging bias applied to the charging device. The charging current target is set for each of at least two image formation speeds such that each AC voltage adjusted by the AC voltage adjustment device is substantially the same.
Abstract:
A cleaning device for cleaning a surface of a rotatable image carrier includes a cleaning blade disposed to contact the image carrier and configured to remove toner on the surface of the image carrier, a lubricant applicator unit disposed above the cleaning blade, downstream from the cleaning blade in a surface rotation direction of the image carrier and configured to apply lubricant onto the surface of the image carrier, and an accumulation preventer configured to prevent the toner and excessive lubricant from the lubricant applicator unit from accumulating on the cleaning blade.
Abstract:
A urethane foam member that after cutting into the desired shape from sheet urethane foam is applied with adhesive on one face of the urethane foam, an edge portion of the non-adhesive applied face at least at one side of the urethane foam member being of a low edge profile, to which permanent thermal distortion has been induced such that the thickness of the edge portion of the side is thinnest at the end portion thereof and the thickness gradually increases with distance from the end portion.
Abstract:
A lubricating device operable to lubricate a moving imaging surface subsequent to removal of residual toner by a cleaning device includes a lubricant applicator, a metering blade, and a priming agent. The lubricant applicator is located downstream of the cleaning device in a direction of movement of the imaging surface, and applies lubricant to the imaging surface. The metering blade is located downstream of the lubricant applicator in the direction of movement of the imaging surface, and spreads the applied lubricant into a thin layer by directly contacting the imaging surface. The priming agent is prepared by mixing a lubricant and a powder, and provided, prior to initial operation, on the lubricant applicator for application to the imaging surface upon startup.
Abstract:
The invention provides a charging device used in an image forming apparatus such as a copier, a fax machine, a printer or the like, the charging device including: a gold-plated discharge wire for charging an image carrier such as a photoconductive member or the like; and a cleaning member, having an abrasive, for cleaning the discharge wire, with the gold plating being maintained over time satisfactorily, and provides a process cartridge having this charging device. The cleaning member has an abrasive containing alumina and/or silicon, the grain size of which ranges from #6000 to #8000. The discharge wire is a tungsten wire on which a plating film is formed by gold plating, such that the thickness of the plating film is not smaller than 1.5 μm, and the diameter of the tungsten wire is not smaller than 30 μm.
Abstract:
An image forming apparatus including an image bearing member the moving surface of which travels, a charging device including a charging member located facing the moving surface of the image bearing member, which uniformly charges the moving surface of the image bearing member to form a latent electrostatic image thereon by applying a charging bias in which an AC voltage is overlapped with a DC voltage to the charging member, a developing device to develop the latent electrostatic image with toner to form a toner image on the moving surface of the image bearing member, a transfer device to transfer the toner image on the moving surface of the image bearing member to a recording medium, a fixing device to fix the toner image on the recording medium, an image formation speed switching device to switch from one image formation speed to another image formation speed among multiple image formation speeds by changing a surface traveling speed of the image bearing member according to a particular switching condition, a storage device to store a charging current target of the charging bias applied to the charging member for each of the multiple image formation speeds, an electric current detection device to detect an electric current flown through the charging member and an AC voltage adjustment device to adjust an AC voltage of the charging bias applied to the charging member such that the electric current detected by the electric current detection device approaches the charging current target stored at the storage device which corresponds to the image formation speed when the electric current is detected. With regard to at least two image formation speeds among the multiple image speeds, the charging current target is set for each of the at least two image formation speeds such that each AC voltage adjusted by the AC voltage adjustment device is substantially the same.
Abstract:
The present invention provides a charging device which comprises a charging roller (14a) and a cleaning component (14b). The charging roller charges a surface of an image-recording medium (11) with a voltage which is applied from an external source. The cleaning component cleans a surface of the charging roller. The charging roller includes a resistance adjustment layer which is made of a resin composite and formed on an outer periphery of a core metal. The hardness of the charging roller is 45 degrees or more in JIS D hardness. The cleaning component has a portion which is in contact with the charging roller This portion is made of resin foam which has a continuous foam structure. The density of the resin foam is 5 to 15 kg/m3 and its tensile strength is 1.7±0.5 kg/cm2.
Abstract translation:本发明提供一种充电装置,其包括充电辊(14a)和清洁部件(14b)。 充电辊以从外部源施加的电压对图像记录介质(11)的表面充电。 清洁部件清洁充电辊的表面。 充电辊包括由树脂复合材料制成并形成在芯金属的外周上的电阻调节层。 充电辊的硬度在JIS D硬度上为45度以上。 清洁部件具有与充电辊接触的部分。该部分由具有连续泡沫结构的树脂泡沫制成。 树脂发泡体的密度为5〜15kg / m 3,拉伸强度为1.7±0.5kg / cm 2。
Abstract:
A charge roller of the present invention includes a shaft, an elastic member affixed to the circumference of the shaft, and a plurality of spacers affixed to the elastic member. Assume that rising portions formed, when the circumference of the elastic member is ground during production, at axially opposite end portions of the elastic member each have a width of W mm in the axial direction. Then, the spacers each are positioned at a distance of at least W/9 mm from the end of the elastic member toward the center in the axial direction.
Abstract:
A cleaning device including a rotatable cleaning member contacting a rotatable image carrier bearing a toner image to electrostatically remove toner from the image carrier while rotating, and a control unit to control rotation of the cleaning member to satisfy a relation of (60/R)>(L/V) during removal of a toner pattern formed on the image carrier at a predetermined timing and remaining attached to the image carrier without being transferred from the image carrier onto a transfer member using the cleaning member, where R (rpm) is a number of rotations of the cleaning member, L (mm) is a length of the toner pattern in a direction of rotation of the image carrier, and V (mm/s) is a speed of the image carrier.