摘要:
A belt device incorporatable in an image forming apparatus includes an endless belt, multiple belt tension rollers disposed in contact with an inner surface of the endless belt, a rotary cleaning member to contact a belt wound area of the endless belt facing an opposing roller to form a cleaning nip between the rotary cleaning member and the endless belt and rotate the rotary cleaning member in a direction opposite the belt moving direction within the cleaning nip, and a voltage applier. The cleaning nip is formed by offsetting a center of the cleaning nip upstream from a center of the belt wound area of the endless belt in the belt moving direction and by at least contacting the rotary cleaning member in a range from the belt wound area to a tensioned belt area located upstream from the belt wound area in the belt moving direction.
摘要:
A cleaning device including a normally charged toner cleaning member provided in contact with a cleaning target at a contact position to remove normally charged toner from the cleaning target, a reversely charged toner cleaning member provided in contact with the cleaning target at a contact position upstream from the normally charged toner cleaning member to remove reversely charged toner from the cleaning target, and a pre-cleaning member provided in contact with the cleaning target at a contact position upstream from both the normally and reversely charged toner cleaning members to remove normally charged toner from the cleaning target. The contact position between the pre-cleaning member and the cleaning target has a width wider than a width of the contact position between the normally charged toner cleaning member and the cleaning target and a width of the contact position between the reversely charged toner cleaning member and the cleaning target.
摘要:
An image forming apparatus including a belt cleaning device is provided. The belt cleaning device includes an image bearing belt having an elastic layer, a cleaning member, a cleaning facing member, and a side seal. A surface of the image bearing belt is movable. The cleaning member is in contact with the surface of the image bearing belt to remove a substance adhered thereto. The cleaning facing member is disposed on a back-surface side of the image bearing belt while facing the cleaning member with the image bearing belt therebetween. The side seal is disposed to an axial end part of the cleaning member and pressed against the surface of the image bearing belt. The cleaning facing member is out of contact with the back side of the image bearing belt within an area where the cleaning facing member faces the side seal with respect to an axial direction.
摘要:
A cleaning device including a normally charged toner cleaning member provided in contact with a cleaning target at a contact position to remove normally charged toner from the cleaning target, a reversely charged toner cleaning member provided in contact with the cleaning target at a contact position upstream from the normally charged toner cleaning member to remove reversely charged toner from the cleaning target, and a pre-cleaning member provided in contact with the cleaning target at a contact position upstream from both the normally and reversely charged toner cleaning members to remove normally charged toner from the cleaning target. The contact position between the pre-cleaning member and the cleaning target has a width wider than a width of the contact position between the normally charged toner cleaning member and the cleaning target and a width of the contact position between the reversely charged toner cleaning member and the cleaning target.
摘要:
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.
摘要:
A novel image forming apparatus including a setting memory storing multiple voltage settings; two or more voltage applying members each contacting a voltage applied member at respective contact positions close to each other, which are simultaneously being applied with respective voltages selected from the voltage settings; two or more current detectors each detecting a current flowing in the respective contact positions; and a setting changer performing a setting changing processing in which the voltage applied to one of the voltage applying members is changed based on the current detected by the corresponding current detector while a predetermined voltage is applied to the other voltage applying members, so that an optimum current flows in the corresponding contact position.
摘要:
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.
摘要:
An image forming apparatus including a setting memory storing multiple voltage settings; two or more voltage applying members each contacting a voltage applied member at respective contact positions close to each other, which are simultaneously being applied with respective voltages selected from the voltage settings; two or more current detectors each detecting a current flowing in the respective contact positions; and a setting changer performing a setting changing processing in which the voltage applied to one of the voltage applying members is changed based on the current detected by the corresponding current detector while a predetermined voltage is applied to the other voltage applying members, so that an optimum current flows in the corresponding contact position.
摘要:
A cleaning device including: multiple cleaning members arranged consecutively in a direction of movement of a cleaning target to remove adhered substances from the cleaning target; multiple casings to individually hold and at least partially enclose the multiple cleaning members, respectively, the casings and the cleaning members together constituting multiple sub-units; and a sub-unit holder to hold the multiple sub-units, from which the sub-units are individually removable.
摘要:
A cleaning device includes a cleaning member, a collection member, an electrical field generator, and a separation member. The cleaning member has a surface capable of moving while contacting a surface of a cleaning target to remove toner on the surface of the cleaning target. The collection member has a surface capable of moving while contacting the surface of the cleaning member to collect the toner on the surface of the cleaning member. The electrical field generator generates an electrical field to move the toner from the cleaning member to the collection member. The separation member contacts the surface of the collection member to separate the toner on the surface of the collection member. The collection member has a centerline average surface roughness of not more than 0.1 μm and shows a surface hardness rank of B or higher in a steel-wool scratch test.