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| Number | Title | Issue Date |
| 5132736 | Transfer drum with different support position for resin sheet An image forming apparatus includes a rotatable recording material supporting drum for supporting a recording material by electrostatic attraction; an image forming device for forming an image on the recording material supported on the recording material ... | 07/21/1992 |
| 5128717 | Image forming apparatus An image forming apparatus includes a movable image bearing member; an image forming device for forming an image on the image bearing member; transfer charging device for transferring an image from the image bearing member onto an image receiving material... | 07/07/1992 |
| 5119141 | Electrostatic roller transfer of toned images from a photoconductor member to a sheet substrate An electrically biased attracter roller is utilized in an electrophotographic image reproduction machine, in place of a conventional corotron device, to electrically transfer toner from the side of a rotating photoconductor drum onto a side surface of pap... | 06/02/1992 |
| 5099287 | Transferring voltage control section An electrophotographic printing apparatus includes a paper supplying mechanism for supplying recording paper, and a transferring section for charging the recording paper supplied from the paper supplying mechanism by means of a transferring voltage and fo... | 03/24/1992 |
| 5084737 | Image transfer method and apparatus wherein the application of the transfer bias is delayed as a function of humidity Toner images are transferred in registry to a receiving sheet held on a transfer drum which drum has one or more layers which varies in resistivity. To offset difficulties in initial securing of the sheet to the drum, a transfer field is not applied as th... | 01/28/1992 |
| 5075731 | Transfer roller device A transfer roller device for transferring onto a copy paper sheet a full color toner image formed on an intermediate transfer belt. A rear-surface electrode roller disposed at the opposite side to a transfer roller with the intermediate transfer belt posi... | 12/24/1991 |
| 5053814 | Image forming apparatus An image forming apparatus includes various image forming units and a detachable paper cassette with data on its outer surface as to thickness, talc content, quality and the type of copy paper; the image forming units being controlled in accordance with t... | 10/01/1991 |
| 5041877 | Image forming apparatus An image forming apparatus of the type having a transfer device for transferring images formed on an image carrying member to a transfer material such as a paper sheet. The apparatus comprises an image carrying member; a charging device for charging the i... | 08/20/1991 |
| 5036360 | Moisture compensation for electrostatographic apparatus An electrostatographic reproduction apparatus transfers a toner image from an image member to a receiver sheet by applying an electric field between the image member and the receiver sheet in a direction urging the toner image to the receiver sheet. A pro... | 07/30/1991 |
| 5034777 | Transferring device having charging device with double oxide and voltage control An image forming apparatus includes a movable image bearing member; an image forming device for forming an image on the image bearing member; a transfer device for transferring an image from the image bearing member to a transfer material at a transfer po... | 07/23/1991 |
| 5019871 | Apparatus for electrostatically absorbing an image supporting material on an image supporting carrying member based on the kind of material used An image forming apparatus includes a movable image carrying member, a latent imager for forming a latent image on the image carrying member, a developer for developing the latent image by a toner, a transferrer for transferring a toner image on the image... | 05/28/1991 |
| 5012293 | Transfer station control in an electrophotographic reproduction device In an electrophotographic reproduction device, such as a copier or a printer, having a transfer station (17) whereat toner images are sequentially transferred from the surface of a moving photoconductor (10) to the adjacent surface of sheets of moving and... | 04/30/1991 |
| 4931839 | Transfer system for electrophotographic print engine A transfer mechanism for a full color double transfer electrophotographic print engine. Relatively conductive developer materials having successively increasing triboelectric charge characteristics are used to develop sequential images. Conductive plates ... | 06/05/1990 |
| 4912515 | Image forming apparatus An image forming apparatus includes a movable image bearing member, a device for sequentially forming on the image bearing member images corresponding to different color information, a device for transferring onto an image receiving material the images fo... | 03/27/1990 |
| 4903067 | Multiimage forming apparatus There is provided a multiimage forming apparatus for forming image data onto photo sensitive drums by an electrophotographic system. This apparatus comprises: an image forming circuit to form different images onto the photo sensitive drums; a transfer dev... | 02/20/1990 |
| 4897731 | Method and means for reading electronic signal patterns stored on a movable image recording surface A scanning system for optoelectronically recorded signal patterns stored in a plural layer medium consisting of inorganic materials throughout and featuring a dielectric storage layer at the surface which faces an electron beam source. The source beam fir... | 01/30/1990 |
| 4896192 | Image forming apparatus An image forming apparatus, in which a separation charger for separating from a photosensitive member a paper, when no paper exists between the photosensitive member and the separation charger, is applied with AC voltage, with DC voltage of reverse polari... | 01/23/1990 |
| 4857959 | Method and apparatus of charging for transfer in electrophotograph device A charging method for transfer in an electrograph device having a phtosensitive drum uses a high voltage pulse train applied to a displaceable transferring sheet to effect transfer to the sheet of an image on the photosensitive drum. A detector for detect... | 08/15/1989 |
| 4772918 | Current-controlled image transfer An image transfer system includes an image bearing member made of a photoconductive layer and an electrically conductive backing layer, a current detector connected between the backing layer and ground, a transfer corona unit for applying corona ions to a... | 09/20/1988 |
| 4771318 | Copying machine with multiple transport function A copying machine with a multiple transport function having a separation charger for separating from the photoreceptor surface copy paper with an image transferred thereon and a circulating transport passage formed from the paper discharge block to the pa... | 09/13/1988 |
| 4754300 | Combined electrographic printer, copier, and telefax machine An electrographic printing apparatus capable of functioning as a copier, printer, and telefax machine is disclosed. The electrographic printing apparatus includes a photoconductive member, preferably a horizontally mounted photoconductive belt, a develope... | 06/28/1988 |
| 4723145 | Color image forming apparatus comprising separate motors for driving the image bearing member and the transfer material supporting member A color image forming apparatus including an image bearing member movable along an endless path, on which color toner images are formed, a transfer material supporting member movable along an endless path for supporting a transfer material and conveying i... | 02/02/1988 |
| 4676627 | Image forming apparatus An image forming apparatus is of such a type that a developed image on an image bearing member is transferred to a transfer sheet and thereafter the transfer sheet is subjected to the action of a charge removing corona discharger, the above apparatus bein... | 06/30/1987 |
| 4662739 | Method of controlling copying machine operation In a copying apparatus which comprises a plurality of rotatable photosensitive members and an image transfer belt rotatably movable in synchronism with the photosensitive members and in which visible image formed on the photosensitive members are transfer... | 05/05/1987 |
| 4643561 | Control system for an electrophotographic printing machine An apparatus which measures the electrical potential of the photoconductive surface. A transport advances material closely adjacent to the photoconductive surface. An electrical bias of a selected magnitude and polarity is applied to the transport. The el... | 02/17/1987 |
| 4640606 | Corona discharger for separating copy paper from photoreceptor in electrophotographic copying machine An electrophotographic copying machine includes a photoreceptor for forming a latent image of a copy document, a transfer corona charger for transferring the latent image onto a copy document, a separation corona discharger for removing charges from the c... | 02/03/1987 |
| 4610530 | Capacitive paper property sensor for copying apparatus A capacitive paper property sensor for sensing the moisture content of copy sheets in a xerographic system in which a copy sheet feed roll pair are made overlong to provide a non-feeding nip segment in addition to the feeding nip segment; a capacitor in e... | 09/09/1986 |
| 4536082 | Transfer type electrostatic reproducing apparatus An electrostatic reproducing apparatus wherein a detecting device for toner image density on the charge receptor and an exposure device are provided between the developing device and the charging device, a discharge current of the charging device and/or t... | 08/20/1985 |
| 4412732 | Transfer medium separating device An improved copy paper separating device for use in a transfer type electrophotographic copying machine is provided. The separating device includes a conductive carrier member, preferably in the form of a conductive endless belt extended between a pair of... | 11/01/1983 |
| 4408863 | Transfer medium separating device In a copy paper separating device for use in a transfer type electrophotographic copying machine which includes a conductive carrier member, preferably in the form a conductive endless belt extended between a pair of pulleys. The conductive carrier member... | 10/11/1983 |
| 4336317 | Method for forming images using a photosensitive screen A novel image forming method comprises the steps of providing a thin layer of magnetic developer particles on the surface of a developer supporting member, imagewise applying ions onto the thin layer in the presence of a magnetic field and imagewise trans... | 06/22/1982 |
| 4318972 | Method for inducing an electrostatic image in a conductive member An electrostatic latent image residing on an electrically insulating surface used to induce a similar image on a sectionally conductive member by bringing one surface of the sectionally conductive member into proximity with the latent image while the oppo... | 03/09/1982 |
| 4297422 | Electrophotographic process for printing a plurality of copies An electrophotographic process for printing a number of copies from a single electrostatic charge latent image once formed on a photosensitive member by projecting an optical image of a document to be copied comprises the following successive steps; (a) a... | 10/27/1981 |
| 4277162 | Electrophotographic apparatus comprising density sensor means One or more marks (34), (36) are provided on a non-image area of a platen (23) which supports an original document (16). Electrostatic images of the document (16) and mark (34) are formed on a photoconductive drum (12) and developed to form toner images. ... | 07/07/1981 |
| 4207100 | Formation of electrostatic latent image Disclosed is a process for forming an electrostatic latent image on a recording element having a dielectric layer superposed on a conductive electrode. In the first step of this process, the recording element and a xerographic sensitive element having a p... | 06/10/1980 |
| 4133610 | Optimum preclean corona current for eliminating the accumulation of contaminants from developers An electrophotographic machine of the transfer type in which tetrafluoroethylene-coated carrier beads transport toner particles to a development zone by virute of the triboelectric attraction between positive toner and negative tetrafluoroethylene. At the... | 01/09/1979 |
| 4126388 | Electrophotocopying machine of electrostatic latent image transfer type An electrophotocopying machine of the electrostatic latent image transfer type employing as a device for projection of images of original documents onto a photosensitive drum an optical fiber device which has a short focal length and permits efficient exp... | 11/21/1978 |
| 4110031 | Electrostatic copying apparatus An electrostatic charge is applied to a dielectric peripheral surface of a transfer drum and a copy sheet is fed between the transfer drum and a photoconductive drum to transfer a toner image from the photoconductive drum to the copy sheet. The drums rota... | 08/29/1978 |
| 4103341 | Ferroelectric photovoltaic method and apparatus for transferring information A method of transferring remanent polarization information from a photovoic ferroelectric unit to a polarizable unit which may either be another portion of the photovoltaic ferroelectric material or a separate piece of material. The photovoltaic ferroele... | 07/25/1978 |
| 4077709 | Transfer charge control system In an electrostatographic copier in which imaging material is transferred from an image support surface to an overlying copy sheet in a transfer station, by electrical transfer charges, the variable leakage conduction of these transfer charges by the copy... | 03/07/1978 |
