摘要:
An image forming apparatus includes a photosensitive drum, a charging roller, a transfer roller, and a toner charging brush, wherein the toner charging brush reciprocates in a longitudinal direction of the photosensitive drum. In the image forming apparatus, when a number of rotations per a unit time of the image bearing member is assumed to be “a” and a number of times of reciprocation per unit time of the toner charging brush is assumed to be “b”, assuming that R=b/a, R is set to be in a range of 1/25≦R≦3. However, R=m/n (m and n are integers of 5 or less) is excluded. Consequently, generation of a periodic attachment pattern appearing on the photosensitive drum is eliminated.
摘要翻译:图像形成装置包括感光鼓,充电辊,转印辊和调色剂充电刷,其中调色剂充电刷在感光鼓的纵向方向上往复运动。 在图像形成装置中,当将图像承载部件的每单位时间的转数假设为“a”,并且将调色剂充电刷的每单位时间的往复次数假设为“b”时, 假设R = b / a,R被设定在1/25 <= R <3的范围内。 然而,排除R = m / n(m和n为5以下的整数)。 因此,消除了出现在感光鼓上的周期性附着图案的产生。
摘要:
An image forming apparatus includes a photosensitive drum, a charge roller for charging the photosensitive drum, a developing device for developing an electrostatic latent image formed on the charged photosensitive drum with a developer, a first auxiliary charging brush which is located upstream from the charge roller in a movement direction of a surface of the photosensitive drum and applies a voltage of a polarity opposite to a normal polarity of a polarity opposite to a normal polarity of the developer, and a second auxiliary charging brush which is located downstream from the first auxiliary charging brush and upstream from the charge roller and applies a voltage of a polarity identical to the normal polarity of the developer. In the image forming apparatus, the first auxiliary charging brush is supplied with an AC voltage to be improved in recovery performance of a transfer residual developer, and contamination of charging means can be prevented.
摘要:
To provide an image forming apparatus improving discharging of a developer from charge providing member for providing charge to the developer remaining on an image bearing member to the image bearing member, the developer is charged from the charge providing member to the image bearing member. When a developer discharging region of the image bearing member is disposed at a charging position, charging member is applied with a voltage having a direct current component of an absolute value equal to or smaller than an absolute value of voltage applied to the charge providing member without an alternating current component.
摘要:
An image forming apparatus includes a photosensitive drum, a charging roller, a transfer roller, and a toner charging brush, wherein the toner charging brush reciprocates in a longitudinal direction of the photosensitive drum. In the image forming apparatus, when a number of rotations per a unit time of the image bearing member is assumed to be “a” and a number of times of reciprocation per unit time of the toner charging brush is assumed to be “b” assuming that R=b/a, R is set to be in a range of ½≦R≦3. However, R=m/n (m and n are integers of 5 or less) is excluded. Consequently, generation of a periodic attachment pattern appearing on the photosensitive drum is eliminated.
摘要翻译:图像形成装置包括感光鼓,充电辊,转印辊和调色剂充电刷,其中调色剂充电刷在感光鼓的纵向方向上往复运动。 在图像形成装置中,当将图像承载部件的每单位时间的转数假设为“a”,并且假设调色剂充电刷的每单位时间的往复次数假定为“b” R = b / a,R设定在½<= R <= 3的范围内。 然而,排除R = m / n(m和n为5以下的整数)。 因此,消除了出现在感光鼓上的周期性附着图案的产生。
摘要:
An image forming apparatus includes a photosensitive drum, a charge roller for charging the photosensitive drum, a developing device for developing an electrostatic latent image formed on the charged photosensitive drum with a developer, a first auxiliary charging brush which is located upstream from the charge roller in a movement direction of a surface of the photosensitive drum and applies a voltage of a polarity opposite to a normal polarity of a polarity opposite to a normal polarity of the developer, and a second auxiliary charging brush which is located downstream from the first auxiliary charging brush and upstream from the charge roller and applies a voltage of a polarity identical to the normal polarity of the developer. In the image forming apparatus, the first auxiliary charging brush is supplied with an AC voltage to be improved in recovery performance of a transfer residual developer, and contamination of charging means can be prevented.
摘要:
A process cartridge includes an image bearing member, a developing device developing an electrostatic image on the member using developer to form a developer image on the member and a developer charger charging residual developer on the member disposed downstream of a transferring position at which the developer image is transferred onto a transfer destination member and upstream of a position at which the electrostatic image is formed on the member with respect to the moving direction of the member. The developer charger is in contact with the member and is movable in the longitudinal direction of the member upon charging the residual developer. L1+d≦L2 when L1 is the developing width of the developing device, L2 is the contact width of the developer charger with the member, and d is the width of movement of the developer charger in the longitudinal direction of the member.
摘要翻译:处理盒包括图像承载部件,显影装置使用显影剂在该部件上显影静电图像,以在该部件上形成显影剂图像;以及显影剂充电器,对设置在转印位置下游的部件上的剩余显影剂进行充电, 相对于构件的移动方向被转印到转印目的地构件上并且在构件上形成静电图像的位置的上游。 显影剂充电器与构件接触并且在对残余显影剂充电时可沿构件的纵向方向移动。 当L 1是显影装置的显影宽度时,L 1+ d <= L 2,L 2是显影剂充电器与构件的接触宽度,d是显影剂充电器在纵向上的移动宽度 会员
摘要:
An image forming apparatus includes a photosensitive drum, a charging roller, a transfer roller, and a toner charging brush, wherein the toner charging brush reciprocates in a longitudinal direction of the photosensitive drum. In the image forming apparatus, when a number of rotations per a unit time of the image bearing member is assumed to be “a” and a number of times of reciprocation per unit time of the toner charging brush is assumed to be “b” assuming that R=b/a, R is set to be in a range of 1/25≦R≦3. However, R=m/n (m and n are integers of 5 or less) is excluded. Consequently, generation of a periodic attachment pattern appearing on the photosensitive drum is eliminated.
摘要翻译:图像形成装置包括感光鼓,充电辊,转印辊和调色剂充电刷,其中调色剂充电刷在感光鼓的纵向方向上往复运动。 在图像形成装置中,当将图像承载部件的每单位时间的转数假设为“a”,并且假设调色剂充电刷的每单位时间的往复次数假定为“b” R = b / a,R设定在1/25 <= R <3的范围内。 然而,排除R = m / n(m和n为5以下的整数)。 因此,消除了出现在感光鼓上的周期性附着图案的产生。
摘要:
An image forming apparatus includes a photosensitive drum, a charge roller for charging the photosensitive drum, a developing device for developing an electrostatic latent image formed on the charged photosensitive drum with a developer, a first auxiliary charging brush which is located upstream from the charge roller in a movement direction of a surface of the photosensitive drum and applies a voltage of a polarity opposite to a normal polarity of a polarity opposite to a normal polarity of the developer, and a second auxiliary charging brush which is located downstream from the first auxiliary charging brush and upstream from the charge roller and applies a voltage of a polarity identical to the normal polarity of the developer. In the image forming apparatus, the first auxiliary charging brush is supplied with an AC voltage to be improved in recovery performance of a transfer residual developer, and contamination of charging means can be prevented.
摘要:
In adjustment control of a developing device, the number of printed sheets and the toner consumption amount per sheet are calculated. If the accumulated toner consumption amount is smaller than a predetermined amount when a predetermined number of sheets are printed, the developing device is caused to supply a developer in a predetermined amount corresponding to the difference, thereby performing development adjustment of the developing device.
摘要:
An image forming apparatus includes an image bearing member for bearing an electrostatic image; a developing unit for developing the electrostatic image on the image bearing member with toner electrically charged to a predetermined polarity; a transfer unit for transferring the toner image from the image bearing member to a transfer material; a toner charging unit for electrically charging residual toner remaining on the image bearing member to the same polarity as the predetermined polarity; and an image bearing member charging unit for contacting to the image bearing member carrying the toner charged by the toner charging unit to electrically charge the image bearing member to the same polarity as the predetermined polarity, the image bearing member charging unit being effective to reduce a charge amount of the toner.