Patent classifications
G03G2215/00654
Static elimination device and medium processing device using the same
A static elimination device includes: a first static elimination member that makes contact with a medium that is transported; a second static elimination member arranged such that the medium is inserted between the first static elimination member and the second static elimination member; and a power source that applies a voltage to at least one of the first static elimination member or the second static elimination member, in which at least one of the first static elimination member and the second static elimination member has an elastic body.
Electrophotographic apparatus, process cartridge and cartridge set
An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging device and a developing device, wherein the charging device comprises a conductive member arranged to be capable of contacting the electrophotographic photosensitive member, the conductive layer at the outer surface of the conductive member comprises a matrix and a plurality of domains dispersed in the matrix, at least some of the domains are exposed at the outer surface of the conductive member, the matrix has a volume resistivity R1 of larger than 1.00×10.sup.12 Ω.Math.cm, the volume resistivity R1 of the matrix is 1.0×10.sup.5 times or more a volume resistivity R2 of the domains, the developing device comprises the toner comprising a toner particle and a silica fine particle, and a coverage ratio of the toner surface with the silica fine particles is from 62.0% by area to 100.0% by area as determined by X-ray photoelectron spectroscopy.
Image forming apparatus
An image forming apparatus includes a transfer unit configured to transfer second charged images superposed with one another onto a holding surface of a recording medium on which at least one first charged image has been electrostatically held and a static eliminating unit disposed upstream from the transfer unit in a transport direction of the recording medium and configured to remove static electricity from the recording medium electrostatically holding the at least one first charged image.
IMAGE FORMING APPARATUS
An image forming apparatus includes a transfer unit configured to transfer second charged images superposed with one another onto a holding surface of a recording medium on which at least one first charged image has been electrostatically held and a static eliminating unit disposed upstream from the transfer unit in a transport direction of the recording medium and configured to remove static electricity from the recording medium electrostatically holding the at least one first charged image.
ELECTROPHOTOGRAPHIC APPARATUS, PROCESS CARTRIDGE AND CARTRIDGE SET
An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging device and a developing device, wherein the charging device comprises a conductive member arranged to be capable of contacting the electrophotographic photosensitive member, the conductive layer at the outer surface of the conductive member comprises a matrix and a plurality of domains dispersed in the matrix, at least some of the domains are exposed at the outer surface of the conductive member, the matrix has a volume resistivity R1 of larger than 1.0010.sup.12 .Math.cm, the volume resistivity R1 of the matrix is 1.010.sup.5 times or more a volume resistivity R2 of the domains, the developing device comprises the toner comprising a toner particle and a silica fine particle, and a coverage ratio of the toner surface with the silica fine particles is from 62.0% by area to 100.0% by area as determined by X-ray photoelectron spectroscopy.
STATIC ELIMINATION DEVICE AND MEDIUM PROCESSING DEVICE USING THE SAME
A static elimination device includes: a first static elimination member that makes contact with a medium that is transported; a second static elimination member arranged such that the medium is inserted between the first static elimination member and the second static elimination member; and a power source that applies a voltage to at least one of the first static elimination member or the second static elimination member, in which at least one of the first static elimination member and the second static elimination member has an elastic body.
Feeding apparatus with control of ion irradiation unit that irradiates sheet
A feeding apparatus includes a feeding unit, an ion generating unit and a controller. The ion generating unit irradiates the sheet fed by the feeding unit with the ion. The controller acquires an information on the fed sheet and to controls the ion generating unit. The controller operates the ion generating unit in a case that the information of the sheet is a first information, and does not operate the ion generating unit in a case that the information of the sheet is a second information.
ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD
An electrostatic charge image developing toner contains toner particles that contain a binder resin and resin particles, fatty acid metal salt particles externally added to the toner particles, and silica particles (A) that are externally added to the toner particles and contain a nitrogen element-containing compound containing a molybdenum element, in which a ratio N.sub.Mo/N.sub.Si of Net intensity N.sub.Mo of the molybdenum element measured by X-ray fluorescence analysis to Net intensity N.sub.Si of a silicon element measured by X-ray fluorescence analysis is 0.035 or more and 0.45 or less.
Conveyance device and image forming apparatus incorporating same
A conveyance device includes a guide, a positioner, and a pusher. The guide extends in a longitudinal direction of an image bearer and is disposed upstream from a transfer position, at which an image is transferred from the image bearer to the recording medium, in a direction of conveyance of a recording medium to guide the recording medium. The positioner positions an end of the guide relative to the image bearer. The pusher contacts the guide at a position closer to a center of the guide than the end of the guide in the longitudinal direction, to push the guide toward the image bearer.
STATIC ELIMINATION DEVICE AND MEDIUM PROCESSING SYSTEM USING SAME
A static elimination device includes static elimination rolls in a paired configuration that respectively have roll bodies continuously extending along an axial direction intersecting a moving direction of a medium and that eliminate static electricity by moving the medium in a nipped state, a static elimination power source that applies a static elimination voltage to at least one static elimination roll of the static elimination rolls in the paired configuration, and a regulating unit that passes through a non-contact portion formed at a part of a contact region of the static elimination rolls in the paired configuration in the axial direction and that extends to a front and a back in the moving direction of the medium to regulate the moving direction of the medium.