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| Number | Title | Issue Date |
| 5124752 | Developing apparatus A developing apparatus comprises a developing roll for carrying single-component toner to a developing area facing an electrostatic latent image carrier; a toner agitation chamber provided along an axis of the developing roll; a toner carry-in path projec... | 06/23/1992 |
| 5121164 | Method for maintaining a liquid composition A method for maintaining a preselected concentrations of first and second charge directors in a toner composition, where such composition is being subjected to a use in which initial concentrations of the first and second charge directors are being deplet... | 06/09/1992 |
| 5087942 | Automatic set-up for electrophotographic copying of transparency originals An electrophotographic copier uses a first light source to copy reflection originals and uses a second light source to copy transparency originals. Operation of the copier is adjusted to attain a desirable copy image of reflection originals using the firs... | 02/11/1992 |
| 5049937 | Imaging device which uses transparent or non-transparent developer based on medium used An electrophotographic imaging device includes a first developer for carrying transparent type toner and a second developer for carrying non-transparent type toner. A paper supplying cassette is provided for supplying a sheet of recording medium. A record... | 09/17/1991 |
| 5047802 | Process control of electrostatographic machine by adjusting charge-to-mass ratio of toner in response to toned density of developed image Control over the electrostatographic process is provided by adjusting the toner charge-to-mass ratio in response to changes in toner contrast. An electrostatographic reproduction machine produces a signal having a value characteristic of the toned density... | 09/10/1991 |
| 5005516 | Device for aiding in measuring pigmented marking particle level in a magnetic brush development apparatus An improved magnetic brush development apparatus for applying developer material to a latent electrostatic image wherein measurement of toner level is facilitated. The apparatus includes a housing defining a sump portion adapted to contain a supply of dev... | 04/09/1991 |
| 5005050 | Control of toner particle charge Apparatus is disclosed for controlling the charge-to-mass ratio of developed electrostatic images. An electrostatographic reproduction machine for developing an electrostatic latent image with charge toner particles produces a control signal characteristi... | 04/02/1991 |
| 5003327 | Printer autocontrast control A printer autocontrast system measures the current passing from a toner reservoir to a charged dielectric member which receives toner from the reservoir. The charge delivered to the drum in this way is scaled and compared to an estimate of the intended im... | 03/26/1991 |
| 4951091 | Image forming apparatus having toner quantity detection means An image forming apparatus includes a main charger and an exposure unit for forming an electrostatic latent image on a photosensitive drum, a developing unit for developing the latent image, a resupply unit for resupplying the developing unit with toner, ... | 08/21/1990 |
| 4947473 | Developing device for copier A developing device for a copier is controlled such that if the rate at which toner is supplied into its developing tank is detected to exceed a preset reference value, stirring rollers for stirring the toner inside the developing tank are caused to rotat... | 08/07/1990 |
| 4821075 | Developing device and developer supply device for the same A developing device and a toner supply device for a color copier and others. A toner supply conduit adapted to transport fresh toner from the toner supply device is disposed in a developer chamber of the developing device. The wall of the toner supply con... | 04/11/1989 |
| 4652111 | Electrostatic recording apparatus An electrostatic recording apparatus comprises a photosensitive body whereon an electrostatic latent image is formed and the electrostatic latent image is toner-developed by a developing apparatus. The developing apparatus is fed with a toner from a toner... | 03/24/1987 |
| 4611900 | Apparatus for sensing the presence of toner particles An apparatus in which the presence of toner particles is detected. The apparatus includes a member adapted to be charged by the toner particles in contact therewith. A signal is transmitted in response to the member being charged to indicate the presence ... | 09/16/1986 |
| 4521103 | Electrophotographic reversal developing apparatus with control of developing electrode bias potential An electrophotographic reversal-developing apparatus according to this invention comprises first means for determining the temperature and humidity of the surroundings in which an electrophotosensitive material is put; and second means responsive to the s... | 06/04/1985 |
| 4496240 | Apparatus for controlled delivery of magnetic toner A developing apparatus for developing an electrostatic latent image by means of a magnetic toner. The apparatus includes a non-magnetic cylindrical sleeve accommodating a first magnet roll and disposed to face the surface of a photosensitive roll, a devel... | 01/29/1985 |
| 4492179 | Control system for regulating the dispensing of marking particles in an electrophotographic printing machine An apparatus which develops a latent image with marking particles. The apparatus includes a developer roller which transports the marking particles closely adjacent to the latent image. As the marking particles are deposited on the latent image, the devel... | 01/08/1985 |
| 4431298 | Apparatus for brush development including means for detecting toner in the toner bath and means for supplying toner to the toner bath A developing apparatus is disclosed which has a toner bath with a magnetic toner placed therein, the toner being supplied via a developing role to a developing gap between an image carrying substance and the developing roll, and a toner supply bath for su... | 02/14/1984 |
| 4371257 | Automatic controller of electrification of magnetic toner In an electrophotographic developing unit including a magnet roll to apply developer consisting of electrically-insulated magnetic toner particles to a latent image to be developed and an electrifying device to electrify the magnetic toner particles in on... | 02/01/1983 |
| 4338019 | Method for operating electrophotographic copying apparatus There is disclosed a method for operating an electrophotographic copying apparatus having a latent image forming unit for forming an electrostatic latent image on a recording medium, a development unit for visualizing the electrostatic latent image with a... | 07/06/1982 |
| 4257347 | Process and apparatus for electrophotographic development of latent images on sheet-like carriers The intensity of development of latent images on dielectric receptor sheets in a liquid bath which contains a dispersion of toner particles and fills a vessel between two electrodes one of which supports a sheet in such a way that the latent image faces t... | 03/24/1981 |
| 4146325 | Method and apparatus for visualization of electrostatic images A method and apparatus for effecting the visualization of electrostatic images. During the deposition of the pigment in the developing area, the absorption of light is measured at least at one part of the surface of the image so as to form a signal, and t... | 03/27/1979 |
| 4078520 | Vibrating screen filter for toner density measuring apparatus If developer within a xerographic developing apparatus becomes excessively charged, excessive toner is added to the apparatus because the excessively charged developer prevents a sensor from sensing the actual toner density within the apparatus. This occu... | 03/14/1978 |
