Matches 1 - 45 out of 45
Match Document Document Title
7596331 Image forming apparatus  
An image forming apparatus includes an auxiliary charging member contacting an image bearing member and for being supplied with a bias of an identical polarity to a normal charge polarity of toner...
7471918 Image forming apparatus using an electrophotographic photoconductor and method of using the same  
The present invention provides an image forming apparatus which can, by uniformly leveling the particles which are non-uniformly adhered to the surface of the photoconductor by using a leveling...
7292806 Image forming apparatus and an image forming method using a plurality of monochromatic developer cartridges  
Prior to the execution of a printing operation, a print preparatory operation is conducted only on a priority developer cartridge out of the plurality of monochromatic developer cartridges mounted...
7218879 Image forming apparatus controlling polarity of residual toner and process cartridge for use in the same  
An image forming apparatus includes an image carrier, a charging device configured to uniformly charge a surface of the image carrier with a charging member applied with a bias of a first polarity...
6954603 Fuser oil contamination prevention and clean-up method  
In order to prevent an imaging forming process of an electrostatographic reproduction apparatus from becoming contaminated with fuser release oil, a substantially uniform layer of pigmented marking...
6904262 Double-faced image formation system  
The invention provides a double-faced image formation system that prevents transfer and adhesion of a lubricant to an image retaining conveyer and an intermediate transfer part. The system is...
6868240 Method for developing in hybrid developing apparatus  
To avoid developing ghost and selective developing without complicating a developing apparatus and to supply surly charged toner to a developing roll while unevenness of images is not generated to...
6853822 Device for removing image disfiguring substances and image forming apparatus using the same  
A device included in an image forming apparatus for removing a substance that disfigures an image. The device includes an adsorbent support that supports an adsorbent. The absorbent has a molecular...
6792218 Method of compensating for low toner consumption  
Artificial toner consumption is triggered to minimize the incidence of “conditioned” toner when a comparison of the rate of toner consumption to the mechanical activity of the...
6654566 Developer agitating system, electrophotographic image forming apparatus and cartridge  
A developer agitating system for agitating a developer includes a cartridge detachably mountable to a main body of an electrophotographic image forming apparatus and including a developing member...
6567632 Electrophotographic device  
The rotating speed of a photosensitive body is reduced for preventing deterioration thereof due to ozone in an electrophotographic device which comprises the photosensitive body, a charger which...
6567626 Image forming apparatus  
In an image forming apparatus for executing an image forming cycle in which a toner image is formed in response to an image formation start command and an image consisting of a fixed toner image is...
6507718 Method and apparatus for reducing adhesion of carrier to image bearing member  
In an image forming apparatus having a reverse development system and using a two-component developer, respective potentials applied when charging an image bearing member and when applying a...
6453131 Image forming apparatus and warm-up method  
An electrophotographic image forming apparatus and method of controlling the apparatus during a warm-up operation. During the warm-up operation, a heating unit for heating a fuser will be turned on...
6389243 Developing device capable of reliably charging developing agent  
A developing unit includes a photosensitive drum, a developing drum, and an agitator. When a charge of toner has dropped below a predetermined charging amount before a subsequent image forming...
6240269 Image forming apparatus having a photosensitive member of amorphous silicon base and system for exposing and charging the photosensitive member  
An electrophotographic process is implemented with improved ghost memory and with high chargeability even under circumstances of increased process speed or compactified structure and the...
6226467 Developer unit detachably attachable to image forming apparatus  
A unit detachably attachable to a main body of an image forming apparatus includes developing means for developing a latent image born on an image bearing body and storage means for storing a time...
6226470 Method and apparatus for image formation using switchable image generators and density control  
An image formation device, such as a printer, forms an image in a transfer format. The image formation device is configured to execute a predetermined down sequence to prepare the device for the...
6212353 Method and apparatus for cleaning an image transfer member  
An imaging device comprising an imaging surface on which images are formed; an image transfer surface which receives the images onto an image transfer portion thereof at a first transfer region and...
6160977 Image forming apparatus and device for applying a lubricant to an image  
In an image forming apparatus of the type sequentially executing charging, exposure, development and image transfer, a device for applying a lubricant to the surface of an image carrier includes a...
6075959 Discharge of photoreceptors  
An electrophotographic printing machine has a photoreceptive member. The photoreceptive member is charged and then exposed with a light image representation to form a latent image. An electric...
5995785 Image forming apparatus having a mechanism for preventing stripping off of a lubricant from a cleaning blade  
An image forming apparatus includes, an image bearing member, a charger which may be a main charger and auxiliary charger for charging the image bearing member, a developing unit for forming a...
5879752 Method of coating a toner conveyor roller  
In an electrophotographic image forming apparatus of the type using single-ingredient type high resistance toner, a developing roller or similar toner conveyor roller is covered with a dielectric...
5862442 Method for driving agitator  
A process and apparatus for driving an agitator to prevent the cohesion or compacting of developing material due to non-performance of the printing operation for a long period of time. The method...
5842082 Image forming apparatus having induced charge density suppressing device for preventing electrostatic hysteresis phenomenon  
An image forming apparatus which forms an image by transferring a developed image formed on an image holding member onto a transfer material by a transfer unit. The image forming apparatus is...
5758234 Apparatus and method for conditioning a photoconductor  
An apparatus and method for depositing toner on substantially the entire surface of the photoconductor to minimize print defects associated with surface contamination. This is accomplished by...
5655183 Image forming apparatus with a transfer station erase  
Transfer of a toner image from an image member to either an intermediate member or a receiving sheet is improved by irradiating a photoconductive layer in the image member during transfer. Erasing...
5572311 Apparatus for decolorizing toner images and an image forming apparatus  
A sheet of paper, plastic or the like on which an image has been formed using a toner that is photochemically decolorizable by absorption of near infrared rays is illuminated with near infrared...
5563692 Automatic apparatus and method for cleaning a charge line  
A method and apparatus for cleaning the charge line of the transfer charger before copying process in an electrostatic apparatus. The cleaning apparatus comprises cleaning member, such as brush,...
5515140 Image forming apparatus for changing pre-processing condition of image carrier based on paper feed position  
An image forming apparatus is provided with an image carrier which rotates while carrying an electrostatic latent image, developer for developing the electrostatic latent image on the image...
5457843 Machine optics and paper path cleaner  
A machine optics and paper path cleaner has a relatively stiff backing sheet and a cleaning sheet attached to the backing sheet at a position spaced from the leading edge. The cleaning sheet is...
5406356 Liquid toner imaging with contact charging  
An electrophotographic device (1) in which a photoconductor drum (3) is charged by a charging roller (5). Insulating liquid (19, 30) is applied at their initial nip. The charging roller both...
5404213 Electrophotographic printing apparatus capable of printing images by electrophotographic processing and its start-up method  
To prevent spurious adherence of toner to the surface of a photosensitive drum during start-up of an electrophotographic printing apparatus, once rotation of the drum and charging of the drum...
5373354 Color electrophotographic device and method  
A color electrophotographic device includes, a color toner image producing device which produces a color toner image on a rotatable photo sensitive drum by forming four toner images thereon; an...
5241342 Image forming apparatus having a charging member and means for protecting the image bearing surface charged by the charging member  
In a printer, in which a fixed brush charger charges a surface of a photosensitive drum to form a charged area to be converted into an electrostatic latent image by an optical system, fine...
5140375 Image forming apparatus  
The invention provides an apparatus for forming a toner image on plural types of recording materials. A transfer device includes a transfer belt to bring a recording material into contact with an...
4888619 Multi-color image forming apparatus for forming a latent image pattern by use of residual toner remaining in a developing device  
A multi-color image forming apparatus including an electrostatic latent image support member, a plurality of developing devices, an image forming device for forming an electrostatic latent image...
4739367 Image forming apparatus having a control means for effecting control of a preliminary processing of image formation  
An apparatus for forming images is disclosed, in which a replaceable unit at least including a developing section is replaceably mounted in said apparatus body. Preliminary processing, such as...
4540270 Electrophotographic copying machine with a pre-copy system  
An electrophotographic copying machine is of the type which starts, in response to the actuation of a copy start switch, its copying operation after a pre-copy process is conducted to stabilize the...
4515465 Electrostatic copying apparatus  
An electrostatic copying apparatus includes a paper jam detector for producing a jamming signal in response to detection of a paper jam, an emergency stopping device for stopping the copying...
4497568 Image formation apparatus  
In image formation control apparatus having a process unit for forming an image on a recording medium and mechanisms for assisting in the image formation, there is provided a first controller for...
4396276 Electronic copying machine  
An electronic copying machine having an image bearing member movable past a station for transferring an image on the image bearing surface thereof to copying paper. A blade member is provided which...
4208697 Apparatus for charging photo-electrostatic semiconductor layers  
An apparatus for the rated charging of electrostatic layers after exposure by a corona discharge is provided, in which the primary current of the voltage transformer and/or the resistance between...
4004508 Magnetic stirring apparatus for developer mixtures  
Apparatus for stirring developer mixtures including ferromagnetic particles. Developer is located within a magnetic field created by either permanent or electromagnets. The field intensity is...
3989368 Reproducing machine cycle out control system  
An automatic reproducing machine having a control system for cycling out the machine. The control system includes elements for sensing the trail edge of the copy sheet and for generating signals...
Matches 1 - 45 out of 45