Matches 1 - 47 out of 47
Match Document Document Title
7619791 Image forming method and image forming device  
A reference developing image is formed on a photoreceptor drum under an image forming condition measured in advance, and the density of this reference developing image is detected. A development...
7548066 Potential measuring device and image forming apparatus using the same  
A potential measuring device for measuring a potential of a measurement object, includes a detection electrode that faces the measurement object, a reference electrode disposed in a vicinity of the...
7499660 Image forming apparatus and image forming method  
An image forming apparatus including (a) a γ conversion unit having a γ conversion table γα i of a first one Vcontα of a designation development contrast in a case that a development contrast...
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...
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...
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...
6925269 Developing apparatus  
A developing apparatus includes a developer container for containing a developer containing toner and carrier particles having a volume resistivity of 10 6 -10 10 Ωcm; a developer carrying member...
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...
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 V 0s . The standard primary charge on the recording member is...
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...
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...
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...
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...
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...
5701560 Image forming apparatus having a photosensitive body formed of a base material consisting of As.sub.2 Se.sub.3 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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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....
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...
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...
RE31964 Automatic development electrode bias control system  
An automatic control system for the bias on a development electrode in which a plurality of ground-insulated, narrow floating electrodes are spaced along a line adjacent the entrance of a liquid...
RE31707 Method and apparatus for electrically biasing developing electrode of electrophotographic device  
A photoconductive member is charged and radiated with a light image to produce an electrostatic image. Sensing electrodes automatically sense the remaining potential in a portion of the...
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...
RE31371 Developing system  
A developing system is provided for a copying process such as an electrophotographic copying process in which a developer is supplied to the surface of a member which is formed with an...
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...
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...
RE30535 Developing device in electrophotographic copying apparatus  
An improved developing device in electrophotographic copying apparatus in which a plurality of developing electrodes are disposed along a path of movement of a photosensitive drum surface. The...
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...
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...
4194828 Process and apparatus for developing an electrostatic latent image  
A process and apparatus for controlling development of electrostatic latent charge images. A development electrode is utilized both to measure a background voltage of an image-free initial portion...
4176942 Electrophotographic copying apparatus  
A photoconductive drum is electrostatically charged and radiated with a light image of an original document to produce an electrostatic image. A toner substance is applied to the drum to produce a...
4141643 Developing electrode arrangement for electrophotographic apparatus  
A photoconductive drum or sheet is movable relative to a developing electrode which is biased to a voltage which prevents smearing of the background areas of the copy. A sensing electrode is...
4139299 Auto-bias developing apparatus  
The process and device are for use in an electrophotographic copying machine using a developing agent of liquid type. A counter-electrode is maintained closely spaced from the peripheral surface of...
4035071 Developing process and apparatus for electrophotography  
A developing process for electrophotography and an apparatus for carrying out the process in which a developing electrode is arranged in opposing relationship with a photoconductive member having...
4003650 Controller for reproduction apparatus  
A copier or reproduction machine of the type having a photoconductive plate, corona generating means to charge the plate in preparation for imaging thereof, exposure means to expose the charged...
3949703 Self-cleaning developer applicator  
A self-cleaning developer applicator system for applying liquid developer to a latent electrostatic image carried by an organic photoconductor supported on a conductive substrate which moves...
3889637 Self-biased development electrode and reproducing machine employing same  
A development apparatus for developing electrostatic charge patterns or images or a dielectric surface which includes an electrically biased development electrode in close proximity to the surface....
3815988 IMAGE DENSITY CONTROL APPARATUS  
An apparatus in which the potential of a sample electrostatic latent image recorded on a photoconductive surface is detected for controlling the density of toner particles deposited on a single...
3782818 SYSTEM FOR REDUCING BACKGROUND DEVELOPER DEPOSITION IN AN ELECTROSTATIC COPIER  
In an electrostatic copier, a direct-current-voltage source and associated circuitry for applying to a biasing electrode in a liquid developer tank and to a ground-insulated conductive...
3599605 SELF-BIASING DEVELOPMENT ELECTRODE FOR ELECTROPHOTOGRAPHY  
A self-biasing electrode system for the development of latent electrostatic images provides low background and good solid area image fill by positioning a conductive electrode adjacent to the image...
Matches 1 - 47 out of 47