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| Number | Title | Issue Date |
| 7308853 | Bulk paper feeding device with intermediate conveyor for image forming device Provided is a bulk paper feeding device with an intermediate conveyor comprising a carrier capable of carrying a large quantity of paper, a paper feeding mechanism for picking up and feeding one sheet at a time of the paper from the carrier, and an intermediate conv... | 12/18/2007 |
| 7289000 | Clock scaling to optimize PLL clock generation accuracy A method and system for scaling a phase lock loop (PLL) based clock, includes: selecting a clock frequency; selecting a reference frequency, multipliers, and an output divider for an output frequency of a PLL, where the output frequency is higher than the clock freq... | 10/30/2007 |
| 7286779 | Apparatus for suppressing deformations in a belt of an image forming device A scale is provided on a back side edge of an intermediate transfer belt for detecting an amount of movement of the belt. In a tandem type image forming apparatus, a sensor is provided as a scale-reading unit that reads the scale. Materials used for the intermediate... | 10/23/2007 |
| 7272335 | Image forming device An image forming device is disclosed which includes an open/close switch for detecting the opening and closing of a manual feed tray, and a power control unit for turning on specific power when the open/close switch detects that the manual feed tray has been opened.... | 09/18/2007 |
| 7203432 | Job processing apparatus A job processing apparatus includes a job executing section, an operating section, an interface section, and a control section. The control section shifts the job processing apparatus from a normal operation mode to a power-saving operation mode after a lapse of sta... | 04/10/2007 |
| 7139497 | Color image forming apparatus having a variable controlled speed ratio An electrophotographic color image forming apparatus of the present invention includes a plurality of image forming sections each including an image carrier and image transferring means. Toner images of different colors are sequentially transferred from the image ca... | 11/21/2006 |
| 7136175 | Printing device with delayed warm-up operation A method of powering up a printing device having a component that employs a warm-up operation, the method including, upon receiving power to the printing device, detecting delay indicia, and selectively delaying the warm-up operation based on the detected delay indi... | 11/14/2006 |
| 7116432 | Power control for a printing unit with a maintenance function A clock supply from a clock controller to portions other than a host interface controller is stopped while periodically monitoring a data receiving state from a host. While executing a predetermined maintenance process, a power supplying mode is shifted to a low-pow... | 10/03/2006 |
| 7092119 | Method, system, and program for managing calibration files in a printing system Disclosed is a method, system, and program for managing calibration files in a printing system. Patches are printed using a screening algorithm and incorporating at least one output appearance factor. A calibration file is generated from measured color values of the... | 08/15/2006 |
| 6810799 | Printing machine with adjusting device for synchronizing the photoconductor and feed guides by means of a master-slave controller A printing machine with an electrophotographic device, having a photoconductor, a photoconductor drive and an illumination device. The electrophotographic unit can be provided with the substrate by a feed device. The photoconductor drive motor is adjusted by a contr... | 11/02/2004 |
| 6661981 | Method and apparatus for controlling transfer belt velocity of a color printer Transfer belt subassembly for a color printer includes a transfer belt, home position indicator, temperature sensor, and memory. The transfer belt subassembly is measured and characterized after fabrication, before being installed in a printer. Measuremen... | 12/09/2003 |
| 6570645 | Stage system and stage driving method for use in exposure apparatus A stage system includes a stage being movable in a predetermined direction, a first unit for applying a force to the stage in the predetermined direction, a moving mechanism for moving one of the first unit and a structure including the first unit, a firs... | 05/27/2003 |
| 6456808 | Systems and methods for reducing banding artifact in electrophotographic devices using drum velocity control Systems and methods for reducing banding artifact in electrophotographic devices are provided. One such electrophotographic device uses a closed loop controller that receives a feedback signal from an encoder connected to the OPC drum to improve the rotat... | 09/24/2002 |
| 6295116 | Optical scanning system for printer An optical scanning system for a printer includes an optical scanning unit having a deflector divided into a plurality of deflection regions to allow repetitive scanning of light emitted from a light source by rotation, the optical scanning unit for scann... | 09/25/2001 |
| 5799231 | Variable index distributed mirror A variable index distributed mirror is disclosed used for high resolution reflective displays that are thin and have high resolution, reflectivity and contrast; wide viewing angle; low power consumption; and low voltage operation. The mirror is electrical... | 08/25/1998 |
| 5779378 | Continuous form printer A printer includes a tractor unit for feeding continuous form paper, encoders driven in synchronization with a tractor belt, and detecting sensors for detecting rotation of the encoders to generate feed pulses at a standard interval. The printer further i... | 07/14/1998 |
| 5628042 | Solenoid controlled sheet registration mechanism A solenoid-controlled sheet registration mechanism for a copier/printer includes registration fingers for registering the lead edge of a sheet before it is fed to the transfer station of the copier/printer, to receive a developed image from the photorecep... | 05/06/1997 |
| 5589923 | Power saving method of an image forming apparatus A power saving method of an image forming apparatus, such as a laser beam printer, warms up the image forming apparatus when a given time period has elapsed after entering a power saving mode for reducing energy consumption, thereby reducing the amount of... | 12/31/1996 |
| 5561501 | Administrating apparatus for administrating a status of an image forming apparatus An administrating apparatus for administrating an image forming apparatus comprises a first receiving unit for receiving the status information of the image forming apparatus in the serial communication, a second receiving unit for receiving a pulse signa... | 10/01/1996 |
| 5546165 | Scanner as test print densitometer for compensating overall process drift and nonuniformity An electrostatographic copier or copier/printer apparatus and method for calibrating same with an improved means for adjusting for process control parameters is described. The apparatus includes a scanner for scanning an original document to be copied and... | 08/13/1996 |
| 5543894 | Correction for surface velocity mismatch in multiple servo paper paths An image processing apparatus, a first servo system has a closed loop digital control with a first reference control signal for driving a photosensitive member, and a second servo system has a closed loop digital control with a second reference control si... | 08/06/1996 |
| 5521692 | Method and apparatus for identifying substrate surface relief and controlling print quality A method and apparatus for identifying surface relief features of a substrate processed in a printing machine, and adjusting the machine parameters as a function thereof, before the substrate is processed through the machine. The apparatus includes a ligh... | 05/28/1996 |
| 5493385 | Electrophotographic color printer apparatus and method with improved registration of colors A multicolor non-impact printer is described that includes a photoconductive image receiver. The receiver is uniformly charged with an electrostatic charge. The receiver is then imagewise exposed by a first electronic exposure source to create a first ele... | 02/20/1996 |
| 5402209 | Electrophotographic reproduction apparatus controllable toner density and method thereof for controlling an electrophotographic reproduction process An apparatus includes a system controller which calculates a ratio of a first signal to a second signal and adjusts a control parameter of an electrophotographic reproduction process so that the density of fog indicated by the ratio is within a predetermi... | 03/28/1995 |
| 5325155 | Controlling the speed of an image-bearing member using relative states A method and apparatus for controlling the relative states between a rotating load member driven by a motor via a transmission where the velocity and position of the rotating load member are determined and the velocity and position of the motor are determ... | 06/28/1994 |
| 5323219 | Copying machine having an automatic document feeder with original positioning means A copying machine is equipped with an automatic document feeder, which separates documents in a document storing section and feeds them one by one onto a platen glass. The documents are stopped at an exposure position by a document conveyance stopper, whe... | 06/21/1994 |
| 5313254 | Motion control system for printing machines The present invention is a method and apparatus for regulating the velocity of a member constrained to move about a predefined path. The invention comprises a magnetic patch or strip, located on a surface of the member, and having a plurality of magnetic ... | 05/17/1994 |
| 5119128 | Apparatus for generating timing pulses in an electrophotographic printing machine An apparatus for generating timing pulses which includes a first flexible member having a plurality of spaced marks thereon, with the first flexible member being rotatably mounted. The apparatus further includes a second flexible member, positioned substa... | 06/02/1992 |
| 5093688 | Image forming process control method and apparatus An image processing apparatus including an image processing unit, computer controller with a memory for storing a program for controlling the processing unit, clock pulse generator for executing the stored computer control program and a divider for dividi... | 03/03/1992 |
| 5010372 | Black-and-white and color copier operable at different processing speeds In a copying machine for both black-and-white and color, a latent image of an original is formed in a photosensitive device by scanning the original by a scanning optical system and is developed by a black or color toner and is thereafter transferred onto... | 04/23/1991 |
| 4947209 | Copying machine control apparatus A copying machine control apparatus which includes a first control means for actuating a first driving means which operates a photoconductive drum, a second control means for actuating a second driving means which operates a scanning means, and a third co... | 08/07/1990 |
| 4908664 | Image forming apparatus An apparatus for obtaining two copies from first and second original documents respectively. An original document table is provided having two original document holding areas capable of holding the first and second original documents. Under the original t... | 03/13/1990 |
| 4860054 | Copier control system A control system for an electrophotographic copier of the type using a photoconductive element having a seam varies the position for starting counting timing pulses, which are adapted to control the operations of various units or electrical loads of the c... | 08/22/1989 |
| 4847660 | Method and apparatus for registration control in an electrophotographic print engine A method and apparatus for controlling belt movement and separated image registration in a belt oriented full color double transfer electrophotographic print engine is disclosed. The photoreceptor and transfer belts have a ratio of lengths which is nomina... | 07/11/1989 |
| 4794423 | Printing or copying apparatus A printing or copying apparatus including a rotatable member, a number of processing devices for forming an electrostatic latent image on the rotatable member, for developing the latent image and for transferring the developed image from the rotatable mem... | 12/27/1988 |
| 4734739 | Image forming apparatus with function permitting key entry during waiting time An image forming apparatus includes an image forming unit for forming an image on a recording medium, a command unit for commanding image forming conditions, a first switch for connecting a power source to the apparatus, a first detector for detecting an ... | 03/29/1988 |
| 4731638 | Timing pulse generator for an electrophotographic printing machine An apparatus which generates timing pulses in an electrophotographic printing machine. A flexible member having spaced, marks formed photographically thereon is mounted on the shaft of the photoconductive member to rotate in unison therewith. As the flexi... | 03/15/1988 |
| 4707110 | Image forming apparatus with color change area discriminating function A transmission light emitting unit emits light on an original placed on an original table. A color change area designating section shifts the light emitted from the transmission light emitting unit to an arbitrary area of an original image which is subjec... | 11/17/1987 |
| 4669862 | Program controlled image forming apparatus An image forming apparatus comprises a rotating drum, a plurality of processing means including means for charging and discharging the rotating drum, a pulse generator for controlling timing of at least one of the processing means and means for starting t... | 06/02/1987 |
| 4657369 | Disposable photoconductive belt assembly for a printer or a copier 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 ... | 04/14/1987 |
