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| Number | Title | Issue Date |
| 6226069 | Stackless continuous dual-sided copying method in photocopiers The invention provides a stackless continuous dual-sided copying method in photocopying machines. The method includes: a first step of finding as a circulatable sheet count the number of copy sheets that can stay in a circulating conveyance path when perf... | 05/01/2001 |
| 6174639 | Positive charging color toner Disclosed are a positive charging color toner comprising a coloring agent and a positive charging electric charge controlling material in a fixing resin, wherein the fixing rein is an urethane-modified polyester resin having an acid value of not more than... | 01/16/2001 |
| 6145828 | Sheet conveyor single-handed parting engagement mechanism In a sheet conveying unit, two conveying sections turn linked and spaced apart such that sheet jams arising in the course of conveyance through the conveying sections can be easily cleared single-handedly. Wherein the sheet-conveying unit functions to tur... | 11/14/2000 |
| 6115150 | Image data processing apparatus and image data processing process An image data processing apparatus is provided which is adapted to perform an image processing process suitable for each of a plurality of image modes on the basis of an output gradation reference curve and computation data. Output image data are generate... | 09/05/2000 |
| 6104905 | Image forming apparatus of intermediate transfer type An image forming apparatus having a developing mechanism for successively forming a plurality of color toner images on a photoreceptor; and an intermediate transfer member on which the plurality of color toner images are transferred from the photoreceptor... | 08/15/2000 |
| 6096467 | Positive charging color toner Disclosed are a positive charging color toner comprising a coloring agent and a positive charging electric charge controlling material in a fixing resin, wherein the fixing rein is an urethane-modified polyester resin having an acid value of not more than... | 08/01/2000 |
| 6090514 | Electrophotographic photoreceptor The present invention provides an electrophotosensitive material comprising a conductive substrate and a single photosensitive layer containing a stilbene derivative (hole transferring material) represented by the general formula (1): ##STR1## (... | 07/18/2000 |
| 6085052 | Posture-maintaining photocopier imaging unit casing A casing unitarily housing the photosensitive drum and developing device of a xerographic imaging system such that the thus composed imaging unit is retained in a predetermined operational position removably installed into a printing machine. The casing i... | 07/04/2000 |
| 6073927 | Automatic document feeder An automatic document feeder includes first and second registration rollers for abutting the leading end of an original conveyed along a conveying path against their contact positions. The first registration roller is included in a plurality of reversing ... | 06/13/2000 |
| 6067436 | Image-forming machine An image-forming machine includes an image-forming unit, a transfer belt assembly disposed beneath the image-forming unit so as to freely ascend and descend between an acting position and a non-acting position, and a lift device for asending and descendin... | 05/23/2000 |
| 6063534 | Nitro group-containing naphthoquinone derivatives and photosensitive material using the same for electrophotography A nitro group-containing naphthoquinone derivative represented by the following general formula: ##STR1## wherein R is a monovalent hydrocarbon group having a nitro group, and a ring A may be substituted with a substituent. This compound is a novel s... | 05/16/2000 |
| 6055410 | Bypass/stack sheet-feeding configuration for miniaturizing electrostatographic apparatus Bypass sheet-feeding section for an electro-statographic image reproducing apparatus employing vertical sheet transport from sheet supply cassettes to the image reproducing section. The bypass sheet-feeding section serves to hold special copying sheets su... | 04/25/2000 |
| 6055331 | Image processing apparatus During pre-scanning, a CPU calculates a gradation data width corresponding to the number of pixels which are 0.3% of the total pixels from a minimum value in a frequency distribution curve of gradation data of all pixels; calculates effective minimum and ... | 04/25/2000 |
| 6049635 | Dotted image area detecting apparatus and dotted image area detecting method An apparatus for and a method of reliably detecting a very small dotted image area. A detecting area including a predetermined number of pixels including a target pixel is set. It is judged whether or not the detecting area belongs to a dotted image area ... | 04/11/2000 |
| 6041212 | Toner replenishing device of image forming machine and toner cartridge for use therein A toner cartridge includes a container body having a toner transport passage, and a toner transporter disposed in the toner transport passage for transporting toner from one end portion toward the other end portion of the toner transport passage while agi... | 03/21/2000 |
| 6038413 | Document original simulator for image fogging detection, and image fogging troubleshooting method and image forming apparatus using the same A document original simulator including first tone simulation portion having substantially the same reflectance as a white original sheet and a second tone simulation portion having a lower reflectance than the first tone simulation portion. When an image... | 03/14/2000 |
| 6031637 | Facsimile machine with automatic mode switching for computer interfacing A facsimile machine provided with a data processing device for executing data processing in communications mode in accordance with a command entered from a communications apparatus having a capability of transmitting and receiving communications data. The... | 02/29/2000 |
| 6031309 | Electromagnet clutch An electromagnetic clutch includes a field member having a hollow in a center thereof and carrying a field coil in the form of a ring, a shaft rotatably placed in the hollow of the field member, a rotor member fixedly attached on the shaft, the rotor memb... | 02/29/2000 |
| 6027109 | Document feeder A document feeder to be mounted atop an image reading device having a stationary optical system disposed under a contact glass. The document feeder includes a document original plate for holding thereon document originals, a document original feeding mech... | 02/22/2000 |
| 6026263 | Combination including container for developer and rotating shaft mounted in container with improvements preventing toner from penetrating a gap formed by the shaft and ensuring that an agitator/conveyor of the shaft acts to fully agitate the toner A developing device having a container including a pair of side walls disposed with spacing, an entry port and a delivery port defined between the side walls, and a main wall extending between the entry port and the delivery port. A rotating shaft is rota... | 02/15/2000 |
| 6022998 | Stilbene derivative and method for producing the same The present invention provides a novel stilbene derivative represented by the general formula (1): ##STR1## wherein R1 and R3 represent an alkyl group, an aryl group, an aralkyl group or an alkoxy group which are optionally subs... | 02/08/2000 |
| 6019361 | Automatic document feeder An automatic document feeder conveys an original along a conveying path to an original reading section in an image processor. First and second registration rollers for abutting the conveyed original against their contact portions, and a guide plate for gu... | 02/01/2000 |
| 6015646 | Electrophotosensitive material and image forming method using the same The present invention provides an electrophotosensitive material comprising a photosensitive layer containing a m-phenylenediamine compound represented by the general formula (1): ##STR1## wherein R1A and R1B are the same or dif... | 01/18/2000 |
| 6014444 | Apparatus for encrypted communication An apparatus for encrypted communication in which transmission data is encrypted based upon a cipher key and is transmitted. The received encrypted data is decrypted based upon a cipher key. A cipher key checker checks for agreement of the cipher keys by ... | 01/11/2000 |
| 6014541 | Device for recovering toner in an image-forming machine A device for recovering toner in an image-forming machine includes a cleaning mechanism for removing the toner that remains on an image carrier, a toner conveyer mechanism for conveying the toner removed by said cleaning mechanism, and a toner recovery co... | 01/11/2000 |
| 6006053 | Photosensitive drum unit and a ground plant used therewith A photosensitive drum unit for an image forming device includes a tubular member having two openings at the opposite ends thereof, two flange members pressed into the openings of the tubular member, and an electroconductive ground plate attached to one or... | 12/21/1999 |
| 5999757 | Sheet transportation device A sheet transportation device for use in an image forming apparatus is provided which has self-diagnosis and self-repair functions. The sheet transportation device has a sheet transportation system including a plurality of units (8). A control sequence fo... | 12/07/1999 |
| 5994012 | Naphthoquinone derivative and electrophotosensitive material using same The present invention provides a naphthoquinone derivative represented by the general formula (I): ##STR1## wherein R1 and R2 are as defined in the specification. An electrophotosensitive material containing this naphthoquinone ... | 11/30/1999 |
| 5995600 | Transmitting method in facsimile When a calling facsimile receives a second control signal, the calling facsimile compares second information relating to the capabilities of a called facsimile and first information relating to the capabilities of the called facsimile which is stored in s... | 11/30/1999 |
| 5995799 | Image forming machine toner replenishing device capable of agitating the toner to avoid toner stagnation A toner replenishing device for an image forming machine has a hopper housing with a toner agitating passageway and a toner carrying passageway, a toner agitator disposed in the toner agitating passageway for agitating recovered toner and fresh toner supp... | 11/30/1999 |
| 5993101 | Shaft coupling and shaft coupling structure for use in image forming apparatus This is invention is directed to a shaft coupling for coupling a first shaft and a second shaft. The shaft coupling includes an outer ring for encasing one end of the first shaft and one end of the second shaft; a first pin provided in the outer ring and ... | 11/30/1999 |
| 5991592 | Document transporting device and method and image reading device provided with the document transporting device A document fed from a document tray to a first transport path is guided to a document inverting unit to invert a transport direction of the document. Subsequently, the document is transported to an image reader unit along a second transport path for image... | 11/23/1999 |
| 5988621 | Recycle document feeder A recycle document feeder according to the present invention includes a pair of document width regulating guides (9a, 9b) for guiding opposite edges of document originals (D) fed back onto a document placing plate (8) for alignment thereof with respect to... | 11/23/1999 |
| 5991053 | Facsimile machine This invention is directed to a facsimile machine adapted for being connectable with an external computer and being capable of conducting a certain communication operation upon receiving a command data in a certain command type from the externally connect... | 11/23/1999 |
| 5984298 | Sheet feeding apparatus with a driving device for a paper stopper A sheet feeding apparatus having a feeding roller for feeding a sheet, a support shaft forwardly and reversely rotatable integrally with the feeding roller and a stopper disposed upstream of the feeding roller in the sheet feeding direction for temporaril... | 11/16/1999 |
| 5987297 | Image-forming apparatus including a photosensitive material drum and a rubber blade for cleaning toner off of the drum An image-forming apparatus using a rubber blade having a rubber hardness of not smaller than 73° for cleaning the residual toner on the photosensitive material drum, wherein a maximum rotational deviation r (mm) of said photosensitive material drum satis... | 11/16/1999 |
| 5987288 | Image forming apparatus having a plurality of magnetic developing rollers An apparatus for developing an electrostatic latent image includes a first developing agent application device and a second developing agent application device disposed facing the peripheral surface of a photosensitive material drum, a developing agent st... | 11/16/1999 |
| 5983056 | Photosensitive drum and image processing unit This invention relates to an image forming apparatus in which a cleaning device is arranged above a photosensitive drum close thereto. The image forming apparatus has an image processing unit provided with the photosensitive drum. The photosensitive drum ... | 11/09/1999 |
| 5978640 | Electrostatographic recyclable cleaning unit and use method A configuration and method are disclosed for recyclably using a fixing roller cleaning device in an electrostatographic fixing station. In a principal embodiment, the cleaning device includes a cleaning web unit 13 installable in cassette fashion into a c... | 11/02/1999 |
| 5977389 | Naphthoquinone derivative The present invention provides a naphthoquinone derivative represented by the general formula (1): ##STR1## wherein R1 represents an aryl group which may have a substituent; and R2 represents an alkylene group which may have a s... | 11/02/1999 |
