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| Number | Title | Issue Date |
| 5196886 | Electrophotographic image forming apparatus including means for correcting density drift A toner sensor measures the amount of toner attached onto a photosensitive drum upon development by a developing unit. A controller compares the measured toner attaching amount with a predetermined reference value, and executes processing for changing at ... | 03/23/1993 |
| 5162848 | Toner empty detecting system A toner empty detecting system for use in an electrophotographic printer. A sensor detects the presence of toner and provides toner-empty or toner-present signals. A first counter is incremented when toner-empty signals are detected at pre-determined time... | 11/10/1992 |
| 5160966 | Apparatus for detecting toner shortage in developing unit In a apparatus for detecting toner shortage in a developing unit for use in an image recording system which forms a latent electrostatic image on a carrier by exposure based on an image signal and which develops the latent image to record the image, provi... | 11/03/1992 |
| 5105218 | Method of resetting toner shortage of an image forming apparatus A method of resetting a toner shortage condition and a toner shortage indication associated with a developing device of an image forming apparatus. When the developing device has reached a toner shortage condition, a toner stortage indication is produced ... | 04/14/1992 |
| 5105219 | Developing toner detecting device An image recording apparatus in which said image recording apparatus has a toner supplied by a developing portion provided separately from a photosensitive material to form a toner latent image thereon, said toner later image is transferred onto a recordi... | 04/14/1992 |
| 5099293 | Image processing apparatus operable analogue and digital copying modes An image processing apparatus includes first latent image formation section for forming an electrostatic latent image corresponding to an image of a document on a photoconductor by projecting light reflected from the document, and second latent image form... | 03/24/1992 |
| 5095331 | Image forming apparatus having toner-empty detecting and indicating mechanism The density of a toner in a developing device is detected by a magnetic sensor if the density is lower than a reference value, a toner-empty state is indicated on a control panel. When a copy key is operated in this toner-empty state, the number of copies... | 03/10/1992 |
| 5070362 | Image forming apparatus having a plurality of selectively operable developers A control member of image forming unit controls a driving motor so as to move a unit of combined developing devices in accordance with a developing mode or a specific operational condition which is set when the unit is moved to a toner supply position due... | 12/03/1991 |
| 5047804 | Image forming apparatus having a toner replenishment control system An image forming apparatus is provided with a plurality of developing units in which the toner replenishing device equipped with each developing unit is actuated for a predetermined period of time. When toner replenishment cannot be completed at the time ... | 09/10/1991 |
| 5035198 | Toner end detection apparatus using ultrasonic sensor A toner end detection apparatus comprises a toner tank which accommodates a toner, a toner detection sensor which has a surface exposed within the toner tank and outputs a detection signal and made up of an ultrasonic sensor which oscillates at a predeter... | 07/30/1991 |
| 5031123 | Method of adjusting toner density After a two-component developer with known toner concentration is poured into a tank and begins to be stirred, its toner density is measured quickly at least three times by a toner density sensor and the final value to which the output of this sensor is e... | 07/09/1991 |
| 5021828 | Copying apparatus having a consumable part A storage apparatus such as a copier or facsimile machine which stores information on paper and uses parts which the operator replaces upon expiration because of consumption of the part or deterioration of the part. A system is provided so that the consum... | 06/04/1991 |
| 4977429 | Apparatus for supplying toner to an image forming apparatus An image forming apparatus having a developing unit for developing a latent image electrostatically formed on a photoconductive element or similar image carrier by a developer, or toner, to produce a toner image, and a cartridge removably mounted on the a... | 12/11/1990 |
| 4952976 | Copier with a toner supply device A copier with a toner supply device which includes a toner cartridge. Toner is supplied from the toner cartridge to a hopper section of a developing unit of the copier and from the toner hopper section to a developing section which includes a developing s... | 08/28/1990 |
| 4951088 | Toner mass developed control ratio modification system A toner mass developed control system for use with electronic printers or copiers provides for the measurement of toned photoconductor reflectivity and bare photoconductor reflectivity. The standard control ratio is modified by characterizing the particul... | 08/21/1990 |
| 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 |
| 4922294 | Image forming apparatus An image forming apparatus equipped with a sensor for detecting the requirement of replenishment and exchange of expendable supplies, parts and the like and an image forming structure capable of forming on the same sheet of paper a prewarning image in add... | 05/01/1990 |
| 4881103 | Developing apparatus This invention discloses a developing apparatus wherein a brush of a developing agent is formed on a developing sleeve by a magnetic field of a permanent magnet disposed inside the developing sleeve, and at least the developing sleeve is rotated while the... | 11/14/1989 |
| 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 |
| 4819019 | Recording apparatus A recording apparatus according to the present invention in which a data is recorded by charging a drived recording medium, scanning laser beams on the drived recording medium to form electrostatic latent images thereon, and developing and transferring th... | 04/04/1989 |
| 4745440 | Image forming apparatus An image forming apparatus of an improved construction, which comprises a viewable image forming medium to form a viewable image on a recording sheet; storage members for accommodating a plurality of sheets of the recording material; processing device for... | 05/17/1988 |
| 4733267 | Apparatus for developing electrostatic latent image A two-component toner is directly supplied to a brush which is cyclically transferred while in resilient contact with a latent image carrier for developing an electrostatic latent image on the latent image carrier. After the image has been developed by th... | 03/22/1988 |
| 4682874 | Particle level indicator An apparatus which detects when particles being dispensed into a development system have been depleted and provides a display of that condition. The apparatus advances particles from a store thereof to the development system. A detector, associated with t... | 07/28/1987 |
| 4668074 | Device for detecting the remaining amount of developer A device for detecting the amount of developer remaining in a developer tank of a developing device is provided. A stirring unit is rotatably provided in the developer tank, and the present detector device is operatively associated with the stirring unit ... | 05/26/1987 |
| 4647185 | Developer detecting device A developer detecting device includes a developing unit for developing latent images with developer, a stirring unit for stirring the developer, a detector for detecting, during a stirring period, a decrease in the amount of developer and circuitry which ... | 03/03/1987 |
| 4632534 | Developing apparatus A developing apparatus is provided with a developing roller disposed in a casing and carrying a toner on the surface thereof, and a detecting mechanism adapted to detect the amount of the toner in the casing and to deliver an empty signal when the casing ... | 12/30/1986 |
| 4627715 | Programmable copier A programmable copier capable of making copies from a plurality of originals from which one or more copies are to be made in accordance with copy information temporarily stored in a memory is provided. The copier is provided with a CPU for checking as to ... | 12/09/1986 |
| 4626096 | Image forming apparatus for forming a visual image in accordance with image signals An image forming apparatus is used in conjunction with a signal generator for producing an image signal representing an image to be recorded. The apparatus includes a device for forming a visible image with visible material on an image bearing member. The... | 12/02/1986 |
| 4620783 | Color image forming apparatus A color image forming apparatus wherein a plurality of developing devices or units are supported on a supporting member or turret which is rotatable to revolve the developing devices to move a desired one of the developing devices to a developing station ... | 11/04/1986 |
| 4619514 | Monochromatic photocopying apparatus and method including color selection A copying machine employs a plurality of color developers. Monochromatic copy is reproduced by selecting one of the color developers, where one-colored toner particles are contained. The copying machine also comprises a color selection switch and an LCD d... | 10/28/1986 |
| 4596456 | Copying apparatus with a movably mounted original table In a copying apparatus, an original image signal is obtained by optically scanning an original surface using an original rest slidably mounted on a housing. The copying apparatus has a construction for detecting malfunctions such as a paper jam or a toner... | 06/24/1986 |
| 4592642 | Developing material amount detecting apparatus A developing material amount detecting apparatus for detecting an amount of developing material contained in a tank includes a detection member provided inside the tank movably between a settled position and a raised position, toner feeding vane for perio... | 06/03/1986 |
| 4583834 | Copying apparatus A plurality of copying machines (12), (13), (14) are connected to a computer (39). Each copying machine (12), (13), (14) comprises sensor means (16), (17), (18), (19), (21), (22), (23), (24) for sensing various operating parameters thereof such as a total... | 04/22/1986 |
| 4572102 | Method of controlling replenishment of toners A toner replenishment control method for a developing material including two kinds of toners triboelectrically chargeable to polarities opposite to each other, which includes the steps of causing the respective toners contained in the developing material ... | 02/25/1986 |
| 4369733 | Toner concentration control apparatus A toner concentration control apparatus of the type for allowing developer to pass through a chute, which is capable of detecting stopping of the flow of the developer in the chute, clogging of the chute with the developer, or coating of a viewing window ... | 01/25/1983 |
| 4313343 | Apparatus for detecting remaining quantity of toner in electrophotographic copying machine An apparatus for detecting the amount of toner in the supply hopper of an electrophotographic copying machine includes a transmitting element in the hopper for generating an ultrasonic acoustic wave and a receiving element in the hopper in operative relat... | 02/02/1982 |
| 4308941 | Logic for coin operated office copy machine vender In a wet cycle copier of the small tabletop mounted variety, conversion is made for vending in the absence of frequent key operator attention. Incidence of power interruption provides for a soak cycle to occur wherein the liquid toner is cycled through th... | 01/05/1982 |
| 4270487 | Developer regulating device in developing apparatus A developer level sensor installed on the sidewall of a developer container in a developing apparatus consists of an oscillator circuit with multiple coils, the mutual inductance of which is adjusted by a moveable electric conductor. The lower limit level... | 06/02/1981 |
| 4174902 | Detection of developer powder amount contained in a developer reservoir An opening is formed in a bottom wall of a developer reservoir, where a U-shaped diaphragm is secured. The diaphragm is bent downward when developer powder is present in the developer reservoir more than a predetermined amount. When the quantity of develo... | 11/20/1979 |
