摘要:
An image forming apparatus includes: a heating device which is installed upstream from a fixing device in a recording medium carrying direction and heats an image forming face of a recording medium; a temperature sensor which detects temperature of a heating device; a cooling device which cools a transfer belt; a cooling fan which cools the cooling device, a photoconductive drum temperature sensor which is provided for each photoconductive drum and detects temperature of the photoconductive drum; and a control unit which controls heating temperature of the heating device to higher than a toner outer layer glass transition temperature Tg and lower than a toner melting point Tm and controls the temperature of the photoconductive drum to lower than a threshold temperature.
摘要:
A conductive drum flange is provided in a cylindrical member of a photoconductive drum. A first gear is formed on an outer circumferential surface of the drum flange. A nonconductive gear member is provided in a shaft member of a transfer roller. A second gear to which driving force is transmitted from the first gear is formed on an outer circumferential surface of the gear member. A groove is formed in at least one of two sides of the gear member. A distance for insulation along the side is increased by groove walls of the groove.
摘要:
An electrostatic charging device is provided according to which an edged electrode plate can be inserted into and removed from the charging device easily merely by sliding the edged electrode member and cleaning of the electrode edges formed on the edged electrode plate can be cleaned easily. A discharging electrode assembly having a number of tooth-like electrode edges disposed in array is slidable along a guide groove formed in a discharge stabilizing shielding case of an electrostatic charging device. The electrode edges are arranged above a control grid when charging a photosensitive OPC. During maintenance, the discharging electrode assembly is moved sliding along the guide groove by means of an insulating attachment which is then engaged with the edged electrode plate. During this movement, the edged electrode plate is sandwiched by a pair of rotatable rollers which are then driven to rotate by the sliding movement, so that electrode edges attached with carbon particles due to corona discharging can be cleaned. Thus, the discharging electrode assembly can be inserted and removed easily with the electrode edges thereof being cleaned simultaneously without removing a charger case or the control grid from the device proper.
摘要:
A charging device that switches and executes a first mode which brings a magnetic brush into contact with a photosensitive member to charge a surface of the photosensitive member and a second mode which collects a two-component developing agent including a toner and a carrier, which remains on the surface of the photosensitive member. The charging device includes a magnetic brush carrying roller, a toner collecting roller, a toner removing member, and a regulating member. The toner collecting roller is located further on a downstream side than the regulating member and further on an upstream side than a contact position of the magnetic brush and the photosensitive member in a moving direction of a roller surface of the magnetic brush carrying roller.
摘要:
A conductive drum flange is provided in a cylindrical member of a photoconductive drum. A first gear is formed on an outer circumferential surface of the drum flange. A nonconductive gear member is provided in a shaft member of a transfer roller. A second gear to which driving force is transmitted from the first gear is formed on an outer circumferential surface of the gear member. A groove is formed in at least one of two sides of the gear member. A distance for insulation along the side is increased by groove walls of the groove.
摘要:
A blade cleaning device of the present invention fixes a blade to a blade support member in a state of sliding and moving it in the longitudinal direction and fixes a second side seal member to the blade support member in a state of sliding and moving it in the longitudinal direction on the second side of the blade support member. By doing this, even if the dimensional tolerance limits of the blade are varied, the gap between the blade support member and the blade member can be sealed surely, and the manufacturing accuracy of the blade as a change part is moderated, and the yield rate of defective products is improved.
摘要:
There are disposed a star-wheel 21 in the form of a thin wall-thickness having a sharp projecting portion 21a as auxiliary member which strips off a recording paper P from the surface of a photosensitive body 2, and an inversion preventing member 22 formed from a synthetic resin sheet having flexibility. The star-wheel 21 is disposed with a spacing between the surface of the photosensitive body 2 and an extreme end of the projecting portion 21a held by a fixed distance G. The inversion preventing member 22 has its extreme end placed in contact with the projecting portion 21a of the star-wheel 21 so that the star-wheel 21 is not allowed to be rotated in the direction reversed to the direction of rotation where the recording paper P passes through a normal carrying route.
摘要:
An image forming apparatus includes a recording medium supply device to supply a recording medium, an image forming part to form an image on the recording medium supplied by the recording medium supply device, a recording medium determination part that is disposed downstream of the recording medium supply device in a recording medium conveyance direction and upstream of the image forming part in the recording medium conveyance direction and includes a light-emitting device and a light-receiving device, and a control part to adjust an image forming method based on an output of the light-receiving device.
摘要:
An image forming apparatus includes a cleaning unit including a cleaning blade which contacts with an image carrier and peels a collected material on the image carrier, and an auger to convey the peeled collected material in a direction parallel to a rotation axis of the image carrier. The auger includes an axial body to rotate around a rotation axis parallel to the rotation axis of the image carrier, a spiral conveyance portion spirally provided on an outer peripheral curved surface of the axial body, and a conveyance portion. The conveyance portion includes a base portion extending in a lateral direction, and plural vane portions provided to be spaced from each other at specified intervals in a longitudinal direction of the base portion.
摘要:
To provide a technique that can realize recycling of a developing agent without deteriorating productivity in a charging device capable of switching and executing charging processing for a photosensitive surface of a photosensitive member and collection processing for a developing agent remaining on the photosensitive surface.A charging device switching and executing a first mode which brings a magnetic brush including magnetic particles into contact with a photosensitive member to charge a surface of the photosensitive member and a second mode which collects, using the magnetic brush, a two-component developing agent including a toner and a carrier, which remains on the surface of the photosensitive member, includes: a magnetic brush carrying roller that carries the magnetic brush into contact with the photosensitive member; a toner collecting roller that electrically collects the toner included in the two-component developing agent collected on the magnetic brush according to the execution of the second mode; and a toner removing member that removes the toner collected by the toner collecting roller from a surface of the toner collecting roller.