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:
A unit includes cartridge electrical contacts provided at respective ends of the cartridge in a longitudinal direction and electrically connecting with body electrical contacts when the cartridge is properly mounted to the image forming apparatus. The cartridge electrical contacts are electrically connected to each other. Mounting the cartridge to the image forming apparatus forms a detection circuit via the cartridge.
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:
An image forming apparatus includes an image forming section, a density detecting device, and a controller. The controller varies density target values set in accordance with the conditions for image forming on a recording material by the image forming section on the basis of the change in the density characteristics of a plurality of pattern images detected by the density detecting device.
摘要:
A charging member for charging a member to be charged includes a base member: a surface elastic member supported by the base member, the elastic member comprises a foamed member and a coating layer covering the foamed member; wherein a surface of the charging member has an Asker-C hardness of not more than 55 degrees and an international rubber hardness (IRHD) of not more than 80 degrees.
摘要:
An image forming device suitable for use in a laser beam printer includes an image forming unit for forming an image on a photoconductor, and a reproduction unit for reproducing a high density image and a halftone image on the photoconductor. A detector then detects the density of the high density image and the halftone image formed on the photoconductor. A controller controls an image forming condition of the image forming unit based on a detection result by the detector.
摘要:
A multivalued input recording signal is subjected to pulse-width modulation at a time unit shorter than the period of a clock signal within the period of the recording signal. Alternatively, the multivalued input recording signal is converted into a plurality of different signals each of whose length of time is shorter than a clock signal within the period of the recording signal, thereby performing pulse-width modulation in accordance with a predetermined weighting. This makes it possible to obtain a highly toned recording signal without raising the frequency of the clock signal. Further, density tone data is generated in dependence upon inputted multivalued pixel data, and control is performed using both the irradiation time and emission intensity of a light beam based on the generated density tone data. An image is formed by irradiating a photosensitive body with the controlled light beam.
摘要:
An image forming apparatus suitable for use in a laser beam printer includes an image forming unit for forming an image on a photoconductor, and a reproduction unit for reproducing a high density image and a halftone image on the photoconductor. A detector then detects the density of the high density image and the halftone image formed on the photoconductor. A controller controls an image forming condition of the image forming unit based on a detection result by the detector.