摘要:
An image forming apparatus in which a transfer device is provided in a position separated from an image carrier. A transfer sheet is conveyed along and contacting a part of a circumferential surface of the image carrier facing the transfer device when transferring a toner image from the image carrier to the transfer sheet. A conveying guide is included to guide and covey the transfer sheet separated from the image carrier to a fixing unit. The conveying guide includes a guiding member to direct the conveying direction of the transfer sheet upward when the leading edge of the transfer sheet contacts the guiding member and to convey the transfer sheet at a part of the conveying guide or the guiding member in a position higher than the position of the leading edge of the transfer sheet contacting the conveying guide or the guiding member, so that the contact area between the transfer sheet and the image carrier increases.
摘要:
An image forming apparatus and method in which a transfer device is provided in a position separated from an image carrier. A transfer sheet is conveyed along and contacting a part of a circumferential surface of the image carrier facing the transfer device when transferring a toner image from the image carrier to the transfer sheet. A conveying guide is included to guide and covey the transfer sheet separated from the image carrier to a fixing unit. The conveying guide includes a guiding member to direct the conveying direction of the transfer sheet upward when the leading edge of the transfer sheet contacts the guiding member and to convey the transfer sheet at a part of the conveying guide or the guiding member in a position higher than the position of the leading edge of the transfer sheet contacting the conveying guide or the guiding member, so that the contact area between the transfer sheet and the image carrier increases, and so that the transfer sheet separates from the image carrier without a discharging of a charge on the transfer sheet.
摘要:
An image forming apparatus including a photoconductive drum, a charger which charges the photoconductive drum, an exposing device which irradiates light to the charged photoconductive drum for forming an electrostatic latent image on the photoconductive drum, a developing device which has two component developer which includes magnetic toner and magnetic carriers and a transfer charger to transfer the developed image to a sheet of paper. The bias voltages of the charger, the developing device and the transfer charger are applied from a common high voltage power source. A developing starting voltage of the developing device is higher than a residual voltage of the photoconductive drum.
摘要:
The invention relates to an image forming device and method therefor solving the subject matter that, if the linear speed of the developing solution carrier for that of the latent image carrier is lowered in order to secure the development capacity, the line image is deteriorated and there occurs a troublesome matter such as the blanking at the halftone rear edge. Such image forming device of the present invention is provided with a two-component magnetic brush type developing apparatus in which the developing bias composed of the DC bias and the AC bias superposed thereon is applied to the developing apparatus, and the latent image formed on the latent image carrier is developed with the two-component developing solution including the magnetic toner and the magnetic carrier. In the image forming device, the magnetic substance including percentage of the magnetic toner is set to 5 wt %.about.35 wt %.
摘要:
A device applicable to an electrophotographic color copier or a color ink jet printer for selectively supplying visualizing liquids of different colors, e.g. black, red, green and blue or a mixture thereof to a photoconductive drum, paper or like recording medium to form a visible image on the medium which corresponds to an image of an original document. The device includes a black liquid vessel, a red liquid vessel, a blue liquid vessel, and a cleaning liquid vessel. The liquids from the various vessels are selectively fed to the device and, after a visualizing operation or a cleaning operation, selectively returned to the respective vessels by two switching units. Residual toner particles are returned to the black liquid vessel. A purifying member for capturing toner or like visualizing agent which is contained in the black liquid is situated between an overflow port of the black liquid vessel and the other liquid vessels and cleaning liquid vessel. Each of the liquid vessels other than the black and cleaning vessel is provided with an overflow port at a slightly higher level than a liquid level upper limit thereof, an effluent vessel communicating to those overflow ports. Another effluent vessel is communicated to the overflow port of the black liquid vessel.
摘要:
A developing apparatus in a transfer-type electrophotographic system having a photosensitive body, wherein the developing apparatus includes a developing roller spaced a small distance from the photosensitive body for supplying a developing solution to the photosensitive body to develop a latent image thereon and to induce a potential on the developing roller through the developing solution from the photosensitive body. A cleaning member is held against the developing roller. In one embodiment, the potential of the developing roller is limited to a level intermediate between predetermined upper and lower limits, and a developing roller is switched into an electrically floating condition except during development of an image. In another embodiment, a developing bias potential is produced responsive to the potential of the developing roller. This bias potential is applied to the developing roller which is used as a developing electrode.
摘要:
A device for supplying a developing solution in a wet-type electrophotographic copying machine has a scraper pressed against a developing roller positioned in confronting relation to a latent-image carrier or photosensitive drum. The scraper and the developing roller jointly form a space of a V-shaped cross section which serves to form a pool of the developing solution. When the developing roller is rotated, the developing solution is drawn upwardly out of the solution pool and uniformly covers the circumferential surface of the developing roller whereupon it is transferred to the latent-image carrier. The apparatus provides a simple way of eliminating air bubbles from the developing solution before it is applied to the latent-image carrier and for applying the developing solution uniformly to the surface of the latent-image carrier.
摘要:
A novel pyrrolopyridine derivative which is a compound represented by the formula wherein Ring A represents an optionally substituted pyridine ring; X represents an electron-attracting group; Y represents an optionally substituted divalent C1-6 chain hydrocarbon group; R1 represents an optionally substituted hydrocarbon group; and R2 and R3 each independently represents hydrogen, an optionally substituted hydrocarbon group or an optionally-substituted heterocyclic group, or R2 and R3 may form an optionally substituted ring in cooperation with the adjacent nitrogen atom, or a salt of the compound. The pyrrolopyridine derivative has vanilloid receptor agonist activity and is useful as medicines such as a preventive/therapeutic agent and analgesic for overactive bladder.
摘要:
A rotor ring and an armature for use in a toothed electromagnetic clutch or a toothed electromagnetic clutch brake. A method of manufacturing rotor rings and armatures used in toothed electromagnetic clutch or a toothed electromagnetic clutch brakes.
摘要:
An image-receiving sheet for use with an electrophotographic method, including a transparent support and an overcoat layer formed thereon is disclosed, in which the overcoat layer (i) includes a thermoplastic resin which has a fluidification initiation temperature lower than that of a toner for image formation to be employed or that of a resin for use in said toner, and (ii) is white and opaque from being in a porous state. Furthermore, an electrophotographic method using the above image-receiving sheet is also disclosed.