摘要:
A toner including toner particles including at least a binder resin having a first melting point and a first solubility parameter, a colorant and a particulate release agent having a second melting point lower than the first melting point and a second solubility parameter different from the first solubility parameter, wherein the particulate release agent dispersed in the toner particles has an average needle-shape degree LD/SD of not less than 1.6, where LD is a diameter of a particle of the release agent dispersed in the toner in a major axis direction thereof and SD is a diameter of the particle in a minor axis direction.
摘要:
A color toner comprises a binder resin, a coloring agent, a release agent and a charge controlling agent, wherein the release agent dispersed in the binder resin has an average particle diameter of from about 0.1 to about 2 .mu.m and wherein a fixed color toner image, which is developed and fixed using the toner, has a Haze factor less than about 20% when the image has an image density of 1.5. The color toner produces images having good image qualities such as good color reproducibility.
摘要:
An apparatus for pulverizing solid particles including an impact-type pulverizing device, a mechanical-type pulverizing device and a piping system connected to the pulverizing devices such that the solid particles may be selectively pulverized in the impact-type pulverizing device and in the mechanical-type pulverizing device successively in this or reverse order.
摘要:
The structure of an electrode for collimation lens in an image pickup tube has an improved joint for an accelerating electrode of an electron gun and a mesh electrode. The joint has an electrode support member integral with the fore end of the accelerating electrode and having a cylindrical center portion width not overlapped with the fore end, and a glass bead for connecting the width and the mesh electrode.
摘要:
An electric leakage detection apparatus may quickly detect an electric leakage. An electric leakage detection apparatus includes a pulse generator that supplies a pulse to a coupling capacitor, a voltage detector that detects a voltage at the coupling capacitor, an electric leakage determination unit that compares the voltage detected by the voltage detector to a first threshold and determines presence or absence of the electric leakage of a DC power supply based on a comparison result. The electric leakage detection apparatus also includes a discharge determination unit that compares the voltage detected by the voltage detector to a second threshold lower than the first threshold and determines whether the detection voltage becomes lower than the second threshold by a discharge of the coupling capacitor. The pulse generator generates a new pulse when the discharge determination unit determines that the detection voltage becomes lower than the second threshold.
摘要:
A conveying device includes a guiding member that has a contact portion that comes into contact with an inner peripheral surface of a conveying belt in which a plurality of suction holes is formed, and an endless conveying belt that has ridges to hold a recording medium lest the recording medium come into contact with the suction holes. A plurality of slits is formed in the contact portion to attract the recording medium to the endless conveying belt through the suction holes. The slits are formed to prevent the conveying belt from falling in the slits when the conveying belt is pressed due to suction.
摘要:
A developing device and image forming apparatus that can satisfy stability over time in relation to amount of developer carried, and prevent developer retention, deterioration of developer and developing sleeve adhesion, wherein the amount of developer carried per unit area on the developer carrier in the developing region is 30 mg/cm2 to 60 mg/cm2; the weight mean particle diameter of the toner is 4.5 μm to 8.0 μm; the ratio Dw/Dn of the toner weight mean particle diameter (Dw) and the number mean particle diameter (Dn) is 1.20 or less; an irregular roughness pattern having the maximum height Rz of the surface roughness of 20 to 40 μm and the mean space Sm of the roughness of 100 to 200 μm is formed on the surface of the developer carrier; and the relationship between the developing gap PG and the gap DG between the developer restricting member and the developer carrier is 1.0≦(DG/PG)≦3.0.
摘要翻译:一种显影装置和图像形成装置,其能够随着时间的推移相对于所携带的显影剂的量而满足稳定性,并且防止显影剂滞留,显影剂的劣化和显影套筒粘附,其中显影剂载体上显影剂承载量在显影剂 区域为30mg / cm 2至60mg / cm 2; 调色剂的重均粒径为4.5μm〜8.0μm; 调色剂重量平均粒径(Dw)与数均粒径(Dn)的比Dw / Dn为1.20以下, 在显影剂载体的表面上形成具有表面粗糙度的最大高度Rz为20〜40μm,粗糙度平均空间Sm为100〜200μm的不规则粗糙图案。 并且显影间隙PG与显影剂限制构件和显影剂载体之间的间隙DG之间的关系为1.0&(DG / PG)≦̸ 3.0。
摘要:
A conveying device includes a guiding member that has a contact portion that comes into contact with an inner peripheral surface of a conveying belt in which a plurality of suction holes is formed, and an endless conveying belt that has ridges to hold a recording medium lest the recording medium come into contact with the suction holes. A plurality of slits is formed in the contact portion to attract the recording medium to the endless conveying belt through the suction holes. The slits are formed to prevent the conveying belt from falling in the slits when the conveying belt is pressed due to suction.
摘要:
An image forming apparatus and process cartridge that achieves extended operating life of a two-component developer without generating such problems as toner scattering, etc. either in the initial period or over time. The gap between the image support member and the developer support member is set to 0.3±0.1 mm. A substance having a resin cover layer on the surface of a core material is used as the carrier. The resin cover layer provides a conductive covering layer comprising a tin dioxide layer on the surface of base particles and an indium oxide layer, and comprises conductive particles formed such that the oil adsorption is 10 to 300 mL/100 g. A substance that provides a bonding resin comprising a hybrid resin having vinyl polymers and polyester polymers is used as the toner. The amount of hybrid resin contained in relation to the amount of releasing agent is set to the range of 0.5 to 3.
摘要:
A toner is proposed which includes toner particles and a fluidity-imparting agent and which has characteristics that when the toner is sieved with a 500-mesh sieve, the residue of the toner on the sieve has a circularity of from 0.93 to 0.97 and when 100 g of the toner is sieved with a 500-mesh sieve, the residue of the toner on the sieve has a weight not greater than 10 mg. The toner is for use in an electrophotographic image formation method using an intermediate image transfer method. A full-color image formation method, using this toner, and an image formation apparatus in which this toner is used are also proposed.