摘要:
A two-component-type developing agent comprising a silicone resin-coated carrier and a positively charging toner, the silicone coated carrier having an average particle diameter of from 60 to 110 µm, the silicone resin coating having an average thickness of from 0.1 to 0.3 µm, the carrier having a resistivity of from 1.5 x 10 8 to 1.5 x 10 11 Ω·cm, the toner concentration being from 3.0 to 5.0 % by weight and the amount of electric charge by friction of the toner based on the suction method being from +10 to +20 µc/g. The silicone resin-coated carrier and the developing agent feature long life without permitting the spent toner to adhere on the carrier surfaces, without permitting the carrier coating to peel off even after repetitively used for extended periods of time, featuring stable amount of electric charge by friction, stable developing properties, and maintaining favorable image quality for extended periods of time developing none of carrier dragging, toner scattering in the machine, background fogging or defective image density.
摘要:
A fusing/fixing apparatus has an upper roller 1 that is rotatable, a lower roller 2 that follows the rotation of the upper roller 1, and a heating means for heating at least one of the first and second rollers 1 and 2. When an image forming medium 5 with a toner image 6 formed thereon is passed and pressed between the upper and lower rollers 1 and 2, the toner image 6 is fused and fixed on the image forming medium 5. The heating means is constructed by combining a halogen heater 3 and a sheathed heater 4.
摘要:
A toner cartridge (100) comprises a container body (101) having a toner transport passage (112), and toner transporter means (130) disposed in the toner transport passage (112) for transporting toner from one end portion toward the other end portion of the toner transport passage while agitating the toner along the toner transport passage (112), and the container body (101) has a toner discharge port (150) provided at the other end portion of the toner transport passage (112), and a recycle toner entry port (170) provided at the one end portion of the toner transport passage (112). When the toner cartridge is mounted at a predetermined position, the toner discharge port (150) is positioned opposite a toner feed port (214) provided in a developing device (10), while the recycle toner entry port (170) is positioned opposite a recycle toner drop port (192) provided in a recycle toner carrier means (19).
摘要:
The present invention relates to a benzidine derivative represented by the general formula (3): wherein R 17 to R 24 are as defined in the present specification. The invention also relates to a benzidine derivative represented by the general formulae (3'), (4), (5) and (6), disclosed herein. The benzidine derivatives improve durability and heat resistance of a membrane containing the same while maintaining high hole transferring capability. Therefore, an electrophotosensitive material, which comprises a photosensitive layer containing the benzidine derivative, has high sensitivity and is superior in durability and heat resistance.
摘要:
An image-forming machine comprising image carrier means (6), electrostatic latent image forming means (8) for forming an electrostatic latent image on the image carrier means (6), developing means (20) for developing the electrostatic latent image on the image carrier means (6) into a toner image, transfer means (12) for transferring the toner image on the image carrier means (6) onto a sheet material, cleaning means (24) for removing the toner remaining on the image carrier means (6) after the toner image on the image carrier means (6) has been transferred onto the sheet material, and toner recycling means (26) for recycling the toner removed from the image carrier means (6) by the cleaning means (24) into the developing means (20). The developing means (20) includes a developing agent container (28) for containing a developing agent (68) that comprises the toner and carrier particles, developing agent application means (56) for applying the developing agent (68) in the developing agent container (28) onto the image carrier means (6), toner replenishing means (124) for replenishing the developing agent container (28) with the toner, toner concentration detection means (66) for detecting the toner concentration of the developing agent (68) contained in the developing agent container (28), and toner replenish control means (188) for controlling the operation of the toner replenishing means (124) by comparing a value detected by the toner concentration detection means (66) with a threshold value.
摘要:
A combination of a container (2, 102) for containing a toner (38), and a rotary means (42, 58, 158) rotatably mounted in said container (2, 102), said container (2, 102) having opposite side walls (20, 22, 120, 122), and said rotary means (42, 58, 158) having a rotary shaft (44, 60, 160), which is rotatably mounted between said side walls (20, 22, 120, 122). A blind hole (28, 30) is defined on an inside of one side wall (20, 120) the blind hole (28, 30) having a shape of a circular truncated cone with its inner diameter gradually increasing inwardly, one end (46) of the rotary shaft (44, 60, 160) is of a nearly spherical shape and is inserted in the blind hole (28, 30).
摘要:
The invention provides toner for a two-component type developer containing toner particles including a binder resin and magnetic powder dispersed in the binder resin. The binder resin in the toner is made of a composition including a low molecular weight polymer and a high molecular weight polymer both having an anionic group. The magnetic powder is contained in the toner particles in the range of 0.1 to 5 parts by weight per 100 parts by weight of the binder resin.
摘要:
A fixation temperature control device is to be applied to a copying machine or the like. A control section determines a heat roller control temperature (T P-H ) in consideration of a detected press roller temperature (T P2 ). When the heat roller temperature (T P1 ) is lower than a reference temperature (T PTH ), a correction value (E1) is added to a heat roller reference temperature (T HCON ) to set the heat roller control temperature (T P-H ) higher than usual. When a fixing unit (35) is in a stand-by status and the press roller temperature (T P2 ) is in a temperature range between 80°C and 90°C, a heat roller (38) and a press roller (37) are preferably rotated at a speed lower than a usual rotational speed.
摘要:
A toner cartridge (35) for an image forming apparatus which is simple to assemble and disassemble, facilitating replacement of the toner cartridge (35) and collecting tank (70). In the toner cartridge (35) for the image forming apparatus, tines (61), which endwise have claws (62) for free-attach/remove support of the collecting tank (70), are formed on the exterior surface of a cap element (60) which seals one end of an outer sleeve element (42).