摘要:
Toner is for use in an image forming apparatus of the TonerJet method, which satisfies any one of the following conditions: a) toner in which the content of reverse-polarity large-diameter toner is 10% by count or smaller; b) toner in which the content of reverse-polarity fine-powder toner is 2% by count or smaller; c) toner comprising a silica additive and a titanium oxide additive such that the content x of the titanium oxide additive is in the range of 0
摘要:
The width of a spacer which defines a gap between a development roller and an FPC is set to the width of a toner layer which is carried on the development roller or narrower. This prevents an edge portion of the spacer from getting deformed. In addition, as the spacer is made of a material whose work function is approximately the same as the work function of toner, it is possible to suppress disturbance of a surface potential of the toner layer. Further, for the purpose of maintaining the uniformity of the toner layer, it is desirable to restrict the amount of the toner on the development roller to a predetermined value or smaller.
摘要:
In a writing head for forming an electrostatic latent image on a cylindrical image carrier, a plurality of writing electrodes are arranged on a first face of a film substrate in a first direction parallel with an axial direction of the image carrier. The writing electrodes are adapted to be abutted against an outer periphery of the image carrier to provide electric charges thereto. A first wiring member are arranged on the first face of the film substrate to supply signals from a first electrode driver to a first electrode group in the writing electrodes. A second writing member are arranged on a second face of the film substrate to supply signals from a second electrode driver to the second electrode group in the writing electrodes.
摘要:
An image carrier cleaning device includes: a first charging member which charges an image carrier to the same polarity as that of a toner after a transfer operation of a toner image formed by the toner charged to a predetermined polarity and having an external additive added thereto; a cleaning member which comes into contact with the image carrier charged by the first charging member; and a second charging member which applies an electric charge having a polarity opposite to a polarity of the toner to the image carrier having passed through the cleaning member.
摘要:
A proximity charger roller is disposed in proximity to a surface of an image carrier and uniformly charges an effective charging area of the image carrier. Abutting portions abut on the image carrier at its both edges which are located on the outer side of the effective charging area, thereby maintaining the proximity distance between the circumferential surface of the proximity charger roller and the image carrier constant. A cleaning roller is longer than the spacing between the abutting portions which are at the both edges, abuts on the abutting portions which are at the both edges, and presses with predetermined pressing force in the direction of the image carrier. The surface of the cleaning roller is made of a soft material and cleans a surface area between the two abutting portions of the proximity charger roller.
摘要:
A nip pressure at an inlet site of a nip portion 69 is higher than a nip pressure at an exit site of the nip portion 69. Thus, the relatively higher nip pressure is applied to a recording medium 4 at the inlet site of the nip portion 69 thereby squeezing out a carrier liquid L from space between toner particles T and between the recording medium 4 and the toner T. Hence, the amount of carrier liquid L remaining in the spaces is notably decreased. The recording medium 4 with a decreased amount of carrier liquid L carried thereon is moved to the exit site of the nip portion 69, where the toner T is brought into pressure contact with one side S1 of the recording medium 4 thereby to be fixed to the recording medium 4.
摘要:
A device and method of forming an image. The image forming apparatus transfers a toner image formed on an image carrier onto a recording medium and fixes, at a predetermined fixing temperature, a toner image transferred onto the recording medium. After a toner image has been transferred and fixed on one side surface of the recording medium, a toner image is transferred and fixed on the other side surface of the recording medium. A fixing temperature for fixing a toner image on one side surface of the recording medium is 100° C. or lower and a transfer condition for transferring a toner image on one side surface of the recording medium is the same as a transfer condition for transferring a toner image on the other side surface of the recording medium.
摘要:
Image data is inputted from a data processing means 123 into storage means 124 so that light emitting elements of one line 128a of a light-emitting element (yellow) line head 128 are activated to expose pixels on an image carrier according to an output signal form a shift resistor 124a. The image carrier is moved in the direction of arrow X in such a manner that the pixels reach a position corresponding to the light emitting elements in a next line 128b. At this point of time, the image data are transmitted to a shift resistor 124b and then outputted to the line 128b so as to expose the pixels again. The image data are transmitted among the shift resistors sequentially by moving the image carrier, thereby sequentially repeatedly expose the same pixels.
摘要:
A developing method, including the steps of: carrying one-component non-magnetic toner on a developer carrier; pressing the one-component non-magnetic toner by a regulating member so as to regulate a transporting quantity of the one-component non-magnetic toner so that the one-component non-magnetic toner is charged; forming an electrostatic latent image on an image carrier; providing the one-component non-magnetic toner to the electrostatic latent image so as to convert the electrostatic latent image into a visible toner image; and controlling the one-component non-magnetic toner so that the one-component non-magnetic toner pressed by the regulating member satisfies the following relationship: B/A≦1, where A represents a width [μm] of a particle size distribution of the one-component non-magnetic toner; and B represents a width [fC] of a charge quantity distribution of the one-component non-magnetic toner.
摘要:
A magnetic powder and a permanent magnet are provided which have magnetic properties enhanced by magnetic interaction. Disclosed are a magnetic powder comprising a mixture of two or more powders including a magnetic powder A (residual magnetic flux density: BrA, coercive force: HcA) and a magnetic powder B (residual magnetic flux density: BrB, coercive force: HcB) of which the residual magnetic flux densities and the coercive forces have the following relationships: BrA>BrB and HcA