| Patent Number |
Title Of Patent |
Date Issued |
| 6101286 |
Image processing apparatus and method having improved color-boundary mixing |
August 8, 2000 |
| It is an object of this invention to provide an image processing apparatus which, when nonmagnetic mono-component development is performed, prevents the formation of white gaps in pattern boundaries between different colors and thereby prevents degradation in the image quality of the for |
| 5974281 |
Image forming apparatus using intermediate transfer member |
October 26, 1999 |
| The present invention provides an image forming apparatus for forming an image on a transfer material by using an intermediate transfer member, having a first transfer bias power supply for applying transfer bias to a first transfer unit to generate first transfer bias between a phot |
| 5873010 |
Image forming apparatus for performing correction control, based on density of toner image |
February 16, 1999 |
| A color image forming apparatus having a plurality of developers is disclosed. The apparatus includes a photosensitive drum, a density sensor for detecting a developed control toner image, CPU and RAM. The apparatus performs a first control for image formation based on a density of a |
| 5678130 |
Developing apparatus including a control function for applied periodic developing bias field |
October 14, 1997 |
| A developing apparatus includes a developer carrying member, disposed opposed to an image bearing member, for carrying a developer; a developing bias voltage applying source for applying a developing bias voltage having an oscillating component to the developer carrying member to develop |
| 5666597 |
Image forming apparatus with delayed discharge by discharge means |
September 9, 1997 |
| An image forming apparatus includes an image bearing member for bearing an image, the image bearing member being rotatable at a first speed and a second speed which is different from the first speed, wherein during image formation on the image bearing member, the first speed is selected, |
| 5666588 |
Image forming apparatus for performing image density control |
September 9, 1997 |
| By altering a developing bias, a plurality of patch images are formed on a photoconductor, and a density of each patch image is measured, thereby judging whether or not a target density value is within a range of the plurality of measured density values. If the target density value is |
| 5559591 |
Image forming apparatus with function of requesting exchange of fixing unit |
September 24, 1996 |
| An image forming apparatus including image forming unit for forming an unfixed image on a recording medium, a pair of fixing rotary members for fixing the unfixed image on the recording medium, a cleaning member for cleaning surfaces of the fixing rotary members, the fixing rotary member |
| 5548381 |
Developing apparatus forming alternating electric field between image bearing member and toner c |
August 20, 1996 |
| A developing apparatus includes a toner carrying member, disposed opposite an image bearing member for bearing an electrostatic image, for carrying toner to the image bearing member; an electric field forming device for forming an alternating electric field between the image bearing memb |
| 5543900 |
Image forming apparatus which reduces toner fusion on an image bearing member |
August 6, 1996 |
| An image forming apparatus includes an image bearing member for bearing an image of toner and a charging member contactable to the image bearing member to charge the image bearing member. The charging member is adapted to receive a voltage and the toner has a melt index of not less than |
| 5523829 |
Image forming apparatus having recording material carrying member |
June 4, 1996 |
| An image recording apparatus includes an image bearing member; a recording material carrying member for carrying a recording material to a transfer position for transfer of an image; a moving device for imparting relative movement between the image bearing member and the recording materi |
| 5508796 |
Image forming apparatus with select relation among distances in recording material conveyance pa |
April 16, 1996 |
| The present invention provides an image forming apparatus with an image bearing member capable of rotating while bearing a toner image thereon, a transfer device for transferring the toner image from the image bearing member to a recording material at a transfer position, recording mater |
| 5471284 |
Image forming apparatus having toner depletion detection feature |
November 28, 1995 |
| An image forming apparatus usable with a process cartridge for forming an image on a recording material. The process cartridge includes an image bearing member, and at least one developing device for developing a latent image formed on the image bearing member with a developer. Each of s |
| 5414493 |
Image forming apparatus |
May 9, 1995 |
| An image forming apparatus includes a detachably mountable process cartridge, the process cartridge including an image bearing member and a color developing device actable on the image bearing member, the color developing device containing plural developing units having yellow develo |
| 5390012 |
Image forming apparatus having transfer material carrying member |
February 14, 1995 |
| An image forming apparatus includes an image bearing member; an image forming device for forming a toner image on the image bearing member; a transfer material carrying member for carrying a transfer material, wherein the toner image is electrostatically transferred onto the transfer |
| 5307127 |
Developing apparatus using one component toner with improved flowability |
April 26, 1994 |
| A developing apparatus includes a developer carrying member for supplying a developer to an image bearing member, wherein the developer is a one component developer, and has a flowability index of 5-30%. A developing bias voltage application device applies a developing bias to the develo |
| 5229821 |
Process cartridge with toner depletion detection feature and image forming apparatus using the s |
July 20, 1993 |
| An image forming apparatus is provided with a detachable process cartridge having an electrophotographic photoconductive drum and a plurality of developing units. Each of the developing units has a signal generating device for generating a signal corresponding to the amount of toner in t |
| 5032852 |
Image forming apparatus |
July 16, 1991 |
| The present invention provides an image forming apparatus comprising a first developing device for developing a first latent image to form a first toner image, a second developing device for acting on an image bearing member on which the first toner is formed to develop a second late |
| 4766468 |
Developing method and apparatus for a photocopier |
August 23, 1988 |
| A method of development includes providing a mixture of non-magnetic developer particles and magnetic particles in a developer supply container, carrying the mixture on an insulating surface of an endlessly movable developer carrying member and confining the magnetic particles within |
| 4739348 |
Recording head assembly using magnetic toner and image forming apparatus using the same |
April 19, 1988 |
| A recording technique for causing a magnetic toner to pass through needle-like recording electrodes by a magnetic force and forming a toner image on a recording medium by a signal voltage applied to each recording electrode uses an arrangement to allow smooth flow of the toner near the |
| 4682880 |
Multicolor image recording method and device utilizing a single image transfer to the recording |
July 28, 1987 |
| An electrostatic latent image is formed on a rotatable latent image bearing member and is developed with a developer into a visualized image on the latent image bearing member. The visualized image is transferred by pressure to a rotatable visualized image bearing member. Those steps are |
| 4658275 |
Image forming apparatus |
April 14, 1987 |
| An image information signal is applied to an ion generator, which generates ions in accordance with the image information signal and extracts the ions to deposit them on one side of an image bearing member. An electric charge having the polarity opposite to that of those ions is injected |
| 4590496 |
Image recording apparatus |
May 20, 1986 |
| An image recording apparatus includes a recording electrode having an array of electrode elements which are electrically isolated, a recording material opposed to the recording electrode, a mechanism for applying conductive and magnetic toner particles to the surface of the recording |
| 4573061 |
Image recording apparatus |
February 25, 1986 |
| An image recording apparatus includes a recording electrode having an array of electrode elements which are electrically isolated, a recording material on which an image is recorded, a driving mechanism for moving the recording material while it is opposed to the recording electrode, a |
| 4502061 |
Image forming apparatus |
February 26, 1985 |
| A novel image recording system using particulate developer. The particulate developer is accumulated in a container. A developer carrying member is disposed movably in contact with the accumulated developer. At the position where the particulate developer is to be flowed out from the |
| 4491855 |
Image recording method and apparatus |
January 1, 1985 |
| A method and apparatus utilizing a controller having a plurality of openings or slit-like openings to control the passage of charged particles and to record a visible image by the charged particles directly on an image receiving member. The present invention is an improved device for |
| 4478510 |
Cleaning device for modulation control means |
October 23, 1984 |
| This invention provides a cleaning device for an image forming apparatus in which an image is formed on an image receiving member by controlling the passage of charged particles such as charged toner particles or a flow of ions through control device having plural openings or slits, and |
