Famous Patents
In 1879, Auguste Bartholdi received design patent number 11,023 titled "Design for a Statue". It was for the Statue of Liberty.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8107841 | Image forming apparatus and control method therefor An image forming apparatus capable of suppressing occurrences of image defects and maintaining the image density constant while improving the development ability. The image forming apparatus includes a photosensitive drum on which an electrostatic latent image is ca... | 01/31/2012 |
| 7991314 | In situ electrophotographic printer toner charge measurement A systems and methods for providing an image forming machine capable of monitoring the absolute charge to mass ratio of toner and dielectric thickness of a photoconductor layer on a photoconductor in an image forming device, and for providing warnings, alerts and pr... | 08/02/2011 |
| 7903990 | Image forming apparatus having a controller that controls a potential In a development device which develops an electrostatic image formed on a rotating photosensitive drum by applying a development bias to a development sleeve bearing a two-component developer, the development device includes a specific pattern determination portion ... | 03/08/2011 |
| 7336910 | Image forming apparatus with gamma conversion means The invention provides an image forming apparatus and an image forming method, capable of providing an image with little deterioration, even in case the image contrast has to be adjusted not for the purpose of image adjustment, such as for reducing the toner consump... | 02/26/2008 |
| 7274887 | System and method for setup of toner concentration target for a toner concentration sensor A method by which the target of a toner concentration (TC) sensor can be set up based on the equivalent developability concept without using an expensive patch generator. First, use a black toner area coverage (BTAC) sensor to measure the relative reflectance (RR) o... | 09/25/2007 |
| 7158733 | Image forming apparatus which includes an image bearing body surface potential detection feature An image forming apparatus includes an image bearing body which can bear an electrostatic image; a bias member to which a predetermined bias is applied from a bias applying device; and a surface potential detection device which detects a surface potential at the ima... | 01/02/2007 |
| 6941095 | Image forming apparatus using image carrier cleanerless system An image forming apparatus having an image carrier, a charging unit for charging the image carrier and residual toner on the image carrier, a charging bias applying unit, an electrostatic image forming unit, a developing unit for collecting the residual toner on the... | 09/06/2005 |
| 6925269 | Developing apparatus A developing apparatus includes a developer container for containing a developer containing toner and carrier particles having a volume resistivity of 106-1010 Ωcm; a developer carrying member for carrying the developer contained in the develo... | 08/02/2005 |
| 6901233 | Image forming apparatus An image forming apparatus of the present invention includes a bias power supply for applying a bias VB to a developer carrier on which a developer is deposited. A charge potential deposited on an image carrier, which faces the developer carrier for formi... | 05/31/2005 |
| 6738586 | Print control method of electrophotograph and image formation apparatus with potential sensor using the method A print control method of an electrophotograph in an image formation apparatus including at least a photoconductor, a charger, a light exposure unit, and a developing device for forming a background area and an image area on the photoconductor using the charger and ... | 05/18/2004 |
| 6721516 | Image forming apparatus An image forming apparatus of the present invention includes a bias power supply for applying a bias VB to a developer carrier on which a developer is deposited. A charge potential deposited on an image carrier, which faces the developer carrier for formi... | 04/13/2004 |
| 6701116 | Image forming apparatus A quadruple-tandem type image forming apparatus in which four units of an image forming unit are disposed, and toner images are transferred to a transfer material sequentially, wherein supposing that surface potentials of a photosensitive body in each ima... | 03/02/2004 |
| 6647219 | Electrophotographic recording process control method and apparatus The surface of an electrostatic recording member in an electrophotographic recording apparatus is charged to a standard primary charge V0s. The standard primary charge on the recording member is then modulated using a first test exposure E... | 11/11/2003 |
| 6538678 | Image forming apparatus with development controller A high quality image forming apparatus capable of outputting a quality image at a high speed is provided, with which no unevenness is generated on an image and a fog or a change in density is less likely to occur. An exposing unit is operated by an over-f... | 03/25/2003 |
| 6505014 | Image forming apparatus and an image forming process unit An image forming apparatus of the present invention includes an image carrier made up of a conductive base and photoconductive layer and a toner carrier to which a bias for development is applied. The toner carrier conveys toner deposited thereon to a dev... | 01/07/2003 |
| 6498908 | Electrophotographic measurement system A first embodiment of a measurement system provides an indication of performance of an electrophotographic process. The first embodiment includes a charge measurement device coupled to a developing device and a high voltage power supply. The charge measur... | 12/24/2002 |
| 6330405 | Image forming apparatus In an image forming apparatus, the developing unit includes two developing rollers whose rotational directions are different from each other, and a bias potential of the developing roller (first developing roller) located upstream in the rotational direct... | 12/11/2001 |
| 5920747 | Image forming apparatus for stabilizing the density of dot images In an electrophotographic image forming apparatus, the density of a dot image is stabilized by detecting the toner density of a first standard toner image having toners of a uniform density formed on a photoconductor, adjusting the development bias voltag... | 07/06/1999 |
| 5767888 | Process and arrangement for generating high-quality matrix print using electrophotographic printing equipment An electrophotographic process and arrangement for generates a macro-charge zone inkable by toner applicators and delimited by an inking limit (EG) having an adjustable contour on a photoconductor of a printing or copying machine, using at least one expos... | 06/16/1998 |
| 5758225 | Method and device for supplying a variable bias voltage to a developing roller A method and a device for supplying a developing bias voltage capable of minimizing toner consumption by reducing wasted toner during a printing operation in the image forming apparatus. The image forming apparatus comprises a photosensitive drum for form... | 05/26/1998 |
| 5701560 | Image forming apparatus having a photosensitive body formed of a base material consisting of As2 Se3 or a-Si and a method In an image forming apparatus forming an electrostatic latent image on a surface of a photosensitive body by exposing the charged photosensitive body, developing the latent image using a toner to form a toner image, transferring the toner image to a image... | 12/23/1997 |
| 5600407 | Image forming method and apparatus forming combined toner images An image forming method and apparatus creates two toner images on a single portion of an image member. The first toner image formed has multiple density levels. It is recharged before creating the second toner image. An aspect of the potential associated ... | 02/04/1997 |
| 5576817 | Dual zone development for liquid developers An apparatus for developing an image on an imageable surface with liquid developer including a housing having a chamber defined therein for holding liquid developer. A pump is provided for advancing liquid developer from the chamber of the housing to a de... | 11/19/1996 |
| 5503106 | Apparatus for collecting developer carrier in a electrophotographic machine In an image forming apparatus such as an electrophotographic copying machine or an electrophotographic printer, for performing development by using a two-component developer, a carrier collecting device for collecting a carrier deposited on a photosensiti... | 04/02/1996 |
| 5504557 | Electrophotographic-process control apparatus having improved output-image-density control function An electrified portion electric-potential, exposed portion electric-potential, and developing biasing electric-potential are controlled so as to obtain a constant ratio between an input level in exposure to generate the electrostatic latent image and the ... | 04/02/1996 |
| 5426486 | Toner monitor having magnetic field control A toner monitor which measures the magnetic permeability of the developer mix uses a coil around the toner monitor so that when energized with a DC current, the coil acts as an electromagnet to align the developer mix in a consistent fashion at the monito... | 06/20/1995 |
| 5424809 | Image forming method and apparatus for the same An image forming method and an apparatus therefor applicable to a color copier. A signal value representative of a reflection and appearing when the output of a photosensor is minimum in response to a change in the amount of toner deposition on a photocon... | 06/13/1995 |
| 5402210 | Dynamic developer bias control for use in an electrostatographic printing machine A method and apparatus for providing a novel dynamic developer bias control system adapted to determine an optimal developer bias during the processing of the lead edge of an input document. Loss of image density for images on the lead edge of a document ... | 03/28/1995 |
| 5061949 | Image forming apparatus comprising means for setting a proper bias voltage of laser emitting means and method therefor There is disclosed an image forming apparatus comprising a semiconductor laser diode for emitting a laser light onto a photoconductor so as to form an electrostatic latent image thereon. The electrostatic latent image is developed using toner so as to for... | 10/29/1991 |
| 4748934 | Developing apparatus 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 th... | 06/07/1988 |
| 4682882 | Image recording apparatus A image recording apparatus capable, in the measurement of the background density of an original image, of detecting and omitting an area exceeding a determined width and a determined density in the determination of the background density, thus avoiding i... | 07/28/1987 |
| 4678317 | Charge and bias control system for electrophotographic copier A charge and bias control system for a liquid-developer electrophotographic copier in which a sensing electrode is disposed in the developing station just upstream of the developing electrodes. Developer liquid fills the space between the sensing electrod... | 07/07/1987 |
| 4669859 | Developing device A developing device for developing an electrostatic latent image formed on an imaging surface includes a developing electrode disposed opposite to the imaging surface and a control circuit for controlling the potential of the developing electrode. In one ... | 06/02/1987 |
| 4603961 | Development system An electrophotographic printing machine of the type having a photoconductive member wherein at least one electrostatic latent image is recorded thereon. A developer roller transports a developer material closely adjacent to the photoconductive member. A c... | 08/05/1986 |
| 4600295 | Image forming apparatus There is disclosed a copier employing a square wave developing bias voltage instead of the conventional sinusoidal AC developing bias. Such square wave developing bias reduces the moving energy of the toner and prevents the discharge between the developin... | 07/15/1986 |
| 4466732 | Development system having a bounded electrical bias An apparatus in which an image region recorded on a photoconductive surface is developed with a dry developer material. A transport moves the dry material closely adjacent to the photoconductive surface. The charge induced on the transport by the charge o... | 08/21/1984 |
| 4326795 | Image forming process and apparatus therefor The image forming method is executed by projecting a light image on a rotatable recording member to consecutively form electrostatic latent images corresponding to the light image, developing the latent images, projecting a predetermined amount of light o... | 04/27/1982 |
| 4266870 | Electrostatographic apparatus comprising developing bias means An electrode (17) is provided adjacent to a photoconductive drum (12) to sense the background area potential at a leading edge of an electrostatic image on the drum (12). An electrically conductive shield (26) surrounds all surfaces of the electrode (17) ... | 05/12/1981 |
| 4247195 | Bias device for a copying machine In a bias device for a copying machine, the surface potential of the photo-sensitive member is detected and stored, a bias voltage is obtained by superposing a certain potential on the potential thus stored, the surface potential of an electrode confronti... | 01/27/1981 |
| 4213693 | Electrostatographic apparatus comprising improved developing bias control A photoconductive drum (12) is electrostatically charged and radiated with a light image of an original document (16) to form an electrostatic image. The average value of the electrostatic potential of the electrostatic image is sensed and a developing bi... | 07/22/1980 |
