| Patent Number |
Title Of Patent |
Date Issued |
| 5048983 |
Electrographic typewriter |
September 17, 1991 |
| An electrophotographic typewriter comprises a housing on which are mounted an alphanumeric keyboard, a flat-plane display unit, a paper feed tray and a paper output tray. A paper feed path is routed through an electrographic print unit, located in the housing, and comprises a photoconduc |
| 5006868 |
Method and apparatus for printing two or more colors using an electrophotographic process |
April 9, 1991 |
| A process for single-pass multi-color electrophotographic printing comprising the steps of forming first and second electrically charged oppositely polarized, latent images on a dielectric-covered photoconductive printing. First and second toners, oppositely charged and differently c |
| 4960069 |
Magnetic brush developing device |
October 2, 1990 |
| A magnetic brush developing device for use in a copying machine or a printing device includes a developing roller forming a magnetic brush, a developer housing, a developer tank outside the developer housing, a scraper for removing developer from the developing roller after it passes |
| 4958194 |
Transferring device and an image forming apparatus |
September 18, 1990 |
| A transferring device for transferring on a record paper a toner image formed onto an image forming member is disclosed. The transferring device comprises a transfer belt with a dielectric layer formed on a conduction belt member; a driving device for running the transfer belt; a transfe |
| 4956676 |
Electrographic color printer/copier |
September 11, 1990 |
| An electrographic printer/copier capable of producing color prints is disclosed. The color printer/copier comprises a housing, a source of paper and an output for the paper after it is imprinted, a photoconductive member, and a developer unit containing toners of multiple colors. On |
| 4928055 |
Control circuit for heat fixing device for use in an image forming apparatus |
May 22, 1990 |
| A control circuit for heat fixing device for use in an image forming apparatus is disclosed. The control circuit comprises device for detecting a power source voltage, device for detecting zero-crossing points of the power source voltage, device for determining frequency of the source |
| 4912516 |
Belt transferring device |
March 27, 1990 |
| A belt transferring device for transferring on a record paper a toner image formed onto an image forming member is disclosed. The belt transferring device comprises a transferring belt with a dielectric layer formed on a conductive belt member; a driving device for running the transferri |
| 4903139 |
Image generating system for duplex printing |
February 20, 1990 |
| An image generation system includes a data processor for carrying out data processing operations along with a read only memory (ROM) and random access memory (RAM). A bus bar interconnects the various units to establish a flow of commands and data. A floppy disk controller operates a |
| 4900283 |
Method for arranging chips each having an array of semiconductor light emitting elements |
February 13, 1990 |
| A multiple chip LED linear array including 2048 elements is achieved by a unique wafer dicing technique which allows LEDs in abutting chips to be separated by the same distance as adjacent elements on a single chip. The linear array is employed in photocopy apparatus to discharge a linea |
| 4841334 |
Electrographic printer with small diameter drum and charged transfer belt |
June 20, 1989 |
| An electrographic printing apparatus includes a housing, a source of paper, an output receptacle for receiving the paper after it is imprinted, a photoconductive member for storing a latent electrostatic image, a developer unit for developing the latent electrostatic image, and a cha |
| 4829337 |
Cleaning device for a photoconductive printer or copier |
May 9, 1989 |
| A cleaning device for removing residual developer particles from a photoconductive element, such as a photoconductive belt, comprises a cleaning sleeve having a length substantially equal to the width of the photoconductive element. The cleaning sleeve includes a thin screen portion |
| 4825245 |
Duplex printing module for an electrographic printer |
April 25, 1989 |
| An electrographic printing apparatus capable of duplex printing comprises a housing, a source of copy material and an output tray for receiving such copy material after it is imprinted, and a photoconductive member for storing a latent electrostatic image of the information to be imprint |
| 4814798 |
Combined electrographic printer, copier, and telefax machine with duplex capability |
March 21, 1989 |
| An electrographic printing apparatus is capable of functioning as a copier, printer, and telefax machine, and is also capable of duplex printing. The electrographic printing apparatus includes a photoconductive member in the form of a disposable cassette which is mounted at an angle in t |
| 4786943 |
Device for removing residual developer particles from a photoconductive member |
November 22, 1988 |
| A device for removing residual particles from a photoconductive member comprises a fur brush in contact with the photoconductive member, a metal roller in contact with the fur brush, and a scraper blade in contact with the metal roller. The fur brush is maintained at a first biasing volt |
| 4780740 |
Paper feeding cassette for a printing apparatus |
October 25, 1988 |
| A paper cassette for storing and supplying paper to a smart printer or copier includes a frame for holding the paper, a movable longitudinal paper guide within the frame adjustable to the length of the paper, and a pair of movable horizontal paper guides within the frame adjustable to th |
| 4779119 |
Grooved cleaning blade with end seals |
October 18, 1988 |
| A cleaner unit is disclosed with a rubbery elastic cleaning blade. The blade extends horizontally from an upright base member, where the cleaning edge contacts a vertically downward passing photoconductive surface such that toner scraped from the surface travels over the upper face of th |
| 4758862 |
Electrographic printer/copier with duplex printing |
July 19, 1988 |
| An electrographic printing apparatus capable of duplex printing comprises a housing, a source of copy material and an output tray for receiving such copy material after it is imprinted, and a photoconductive member for storing a latent electrostatic image of the information to be imprint |
| 4757471 |
Electrographic printer/copier with photoconductive belt |
July 12, 1988 |
| An electrographic printing apparatus comprises a photoconductive member surrounded by a charging unit, an optical print head, a developing unit, a transfer unit, a cleaning unit, and an erasing unit arranged in sequence about the photoconductive member. Paper travels along a planar path |
| 4754300 |
Combined electrographic printer, copier, and telefax machine |
June 28, 1988 |
| An electrographic printing apparatus capable of functioning as a copier, printer, and telefax machine is disclosed. The electrographic printing apparatus includes a photoconductive member, preferably a horizontally mounted photoconductive belt, a developer unit for developing an elec |
| 4752805 |
Toner recycling unit |
June 21, 1988 |
| A device for recycling residual developer particles which are removed from a photoconductive element by a cleaning unit in an electrographic copier or printer is disclosed. The device comprises a first tube connected to the cleaning unit and a second tube which is connected to the first |
| 4721977 |
Electrographic printer with abutting chips each having an array of charge-discharging elements |
January 26, 1988 |
| A multiple chip Led linear array including 2048 elements is achieved by a unique wafer dicing technique which allows LEDs in abutting chips to be separated by the same distance as adjacent elements on a single chip. The linear array is employed in photocopy apparatus to discharge a linea |
| 4664507 |
Electrophotographic printer/copier |
May 12, 1987 |
| An electrographic printer/copier includes a paper path which is easily accessed from the top of the machine and permits copies to be collated automatically. The machine includes a paper tray which adjusts to organize successive pages into related reports. |
| 4657369 |
Disposable photoconductive belt assembly for a printer or a copier |
April 14, 1987 |
| A self-contained photoconductive belt assembly for a printer or a copier is disclosed. The self-contained photoconductive belt assembly is in the form of a cartridge or cassette, comprising a frame, first and second parallel rollers within the frame, and an endless photoconductive belt l |
| 4639116 |
Printer/copier with disposable toner cartridge |
January 27, 1987 |
| A developer unit for use in connection with an electrophotographic printer is disclosed. Toner is provided to the developer unit by means of a disposable cartridge so that maintenance requirements are significantly reduced. The developer includes a sensing circuit which measures the |
| 4601259 |
Developing apparatus |
July 22, 1986 |
| A developing apparatus develops an electrostatic latent image formed on the surface of an image retaining member into a visible image by the use of a developer including a magnetic carrier and a toner. The developing apparatus includes a rotatable non-magnetic sleeve retaining the de |
