Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 8050585 | Surface potential detecting device of image forming apparatus In an embodiment of the invention, a metal shield case and a metal shutter are electrically conducted to each other by using a contact part and are made to have the same potential. By this, the shutter does not electrically exert a bad influence on detection accurac... | 11/01/2011 |
| 7324766 | Cross-process charge uniformity scanner In a xerographic printing apparatus, feedback on surface charge at a plurality of locations across a length of a photoreceptor may be desirable to assess charge uniformity, for example, to ensure color consistency across multiple marking engines in tightly integrate... | 01/29/2008 |
| 7292804 | Methods and systems for mounting an imaging media cartridge to a printer A printing system that receives an imaging media cartridge includes a rail and a dock to install the imaging media cartridge. The imaging media cartridge includes a housing that has pivots along an alignment axis substantially parallel to the rail. The imaging media... | 11/06/2007 |
| 7271593 | Contactless system and method for detecting defective points on a chargeable surface A method for detecting charge defect spots (CDSs) on a chargeable surface is provided, including charging the chargeable surface to receive and hold a first voltage charge, spacing a surface of a scanner probe a distance from the chargeable surface, the scanner prob... | 09/18/2007 |
| 7242882 | Electric potential measuring device using oscillating device, image forming apparatus, and electric potential measuring method To provide an electric potential measuring device which is useful in realizing size reduction, high sensitivity, and high reliability. The electric potential measuring device includes: an oscillating device which includes torsion springs, and an oscillating body axi... | 07/10/2007 |
| 7209244 | Post RIP image rendering in an electrographic printer to minimize screen frequency sensitivity A method of printing multiple images with differing line screen frequencies with a printer is print sensitive to differing line screen frequencies, the method comprising the steps of: converting the images into a digital bitmap comprised of an array of pixels wherei... | 04/24/2007 |
| 7164868 | Image forming apparatus with changeable image forming conditions due to changes in a surface layer thickness of an image bearing member An image forming apparatus includes an image bearing member having a surface layer; an electrostatic image forming device for forming an electrostatic image on the surface layer; a developing device, containing at least toner and a carrier, for developing the electr... | 01/16/2007 |
| 7162187 | Image forming apparatus and image forming method In an image forming apparatus, a toner image is formed on a photosensitive element and a transfer roller, which carries a transfer medium, is pressed against a photosensitive element at a pressure of from 20.4 N/cm2 to 200 N/cm2. ... | 01/09/2007 |
| 7098644 | Non-contact high-voltage electrometer architecture with low-voltage feedback A voltmeter measures an unknown voltage on a target surface using multiple sampling stages or a parallel reference capacitor. A movable shutter may alternately be closed during resetting of a voltage measuring circuit and opened so as to expose a detector plate to t... | 08/29/2006 |
| 7078667 | Photo detector for weak light This invention provides a photodetector for weak light and a weak light detection system including the photodetector for weak light the photodetector for weak light is comprised of a substrate on which an integrating read circuit including a PIN photodiode or an APD... | 07/18/2006 |
| 7054014 | Post RIP image rendering in an electrographic printer to estimate toner consumption A method of estimating toner consumption of a input digital image when printed, the digital image comprised of an array of pixels and wherein each pixel is assigned a digital value representing marking information, the method comprising the steps of identifying each... | 05/30/2006 |
| 7021775 | Modular keypad assembly A modular keypad assembly for use with a projection device is provided. This modular keypad assembly may include a user input through which a user may operate the projection device. Such a modular keypad assembly may include a elastomer keypad, a keypad support plat... | 04/04/2006 |
| 7013095 | Image forming apparatus with adjustable toner content in a developing device based on surface layer thickness of an image bearing member An image forming apparatus includes an image bearing member having a surface layer; an electrostatic image forming device for forming an electrostatic image on the surface layer; a developing device, containing at least toner and a carrier, for developing the electr... | 03/14/2006 |
| 6998832 | High-voltage indicating apparatus and method A digital voltage indicator includes a probe having a first electrode including a hollow portion and a probe tip projecting from the hollow portion, a second electrode extending into the hollow portion and spaced therefrom, and dielectric material disposed between t... | 02/14/2006 |
| 6977022 | Method and apparatus for performing a charging process on an image carrying device A charge roller that includes a metal core, an elastic member configured wrapped around the metal core, and film members is disclosed. Each of the film members is wrapped around each end of the elastic member in a circumferential direction of the metal core such tha... | 12/20/2005 |
| 6975411 | Post rip image rendering in an electrographic printer using density patch feedback An electrostatographic recording method for printing an image on a receiver comprising the steps of: operating a primary charger to establish a uniform primary voltage level on an image recording member; developing a control patch on the image recording member, meas... | 12/13/2005 |
| 6909856 | Functionality switching for MICR printing An electrographic printing machine (10) operable in combination with an installed one of a plurality of developing, or toning, stations (38a, 38b), is disclosed. Each of the plurality of toning stations (38a, 38 | 06/21/2005 |
| 6452399 | Modulator base for electrostatic voltmeter modulator assembly An improved modulator assembly of an electrostatic voltmeter for an electrophotographic process. A modulator base of the modulator assembly having accurate configuration and built in design features which simplify manufacture and assembly of the modulator... | 09/17/2002 |
| 6381426 | Automatic gain control for electrostatic voltmeters Method and apparatus for controlling amplifier gain, e.g., as used in ESV of a xerographic copier, has a light source, e.g., an LED, optically coupled to a gain control light dependent resistor (LDR). The LDR can be in a negative feedback loop around an a... | 04/30/2002 |
| 6150824 | Contactless system for detecting subtle surface potential charge patterns A contactless process for detecting electrical patterns on the outer surface of a member comprising providing a member having a charge pattern on an outer surface, repetitively measuring the charge pattern on the outer surface of the member with an electr... | 11/21/2000 |
| 5983043 | Potential measuring apparatus and potential measuring method In a surface potential measuring apparatus for measuring a potential configuration by moving a photosensitive body of an image forming apparatus of electrophotographic type and at least one potential sensor relative to each other and by generating dielect... | 11/09/1999 |
| 5956544 | Electrostatographic reproduction apparatus with electrometer control and method of calibrating the electrometer An electrometer probe is used in an electrophotographic apparatus as part of a process control system to measure charge on a photoconductive film belt. This measurement is used to control voltage level or other process parameter of the electrophotographic... | 09/21/1999 |
| 5633700 | Actuator for actuating a surface contacting probe of a contacting electrostatic voltmeter A contacting electrostatic voltmeter suitable for sampling positive or negative potentials on an electrostatically charged surface. The electrostatic voltmeter includes a selectively controllable actuation mechanism that enables the use of a contacting el... | 05/27/1997 |
| 5585730 | Apparatus for measuring surface charge on a sheet or web The present invention is a device for measuring the electric surface charge density on each surface of a sheet. The sheet can either be moving or non-moving. If the sheet is non-moving a pliers-like device having a pair of electrodes aligned opposite with... | 12/17/1996 |
| 5485248 | Image forming apparatus having a contact charger for varying a charge applied to a photosensitive drum based on a resistance of the photosensitive layer An image forming apparatus includes an image bearing member for bearing an image, a contact charger for charging the image bearing member, and a detector for detecting an electric current flowing through the charger when the charger changes a potential of... | 01/16/1996 |
| 5400120 | Electrophotographic apparatus Qualitative relations between changes in a charge voltage, a developer bias voltage and an exposure light intensity control voltage and change in an image density are investigated in advance, and a density error is derived by a difference between the dens... | 03/21/1995 |
| 5361123 | Microcontroller based xerographic charge device power supply A charging device for producing a voltage potential on a photoconductive member including a corona generator for charging a portion of the image receptor to a substantially uniform potential; a corona generating potential source electrically connected to ... | 11/01/1994 |
| 5307120 | Method for measuring electrostatic potential A method for measuring an electrostatic potential, in an electrophotographic type image forming apparatus to form an image using a photosensitive drum. An electrostatic potential measuring device is provided opposedly to the surface of the photosensitive ... | 04/26/1994 |
| 5296894 | Image forming apparatus and an image member cartridge containing a photoconductive drum An image forming apparatus includes a nest for receiving a photoconductive drum cartridge. The nest includes an electrometer projecting from an end of the nest parallel to an axis of rotation of a drum in a received cartridge. An opening in a received car... | 03/22/1994 |
| 5200780 | Adjustment of surface potential sensor responsive to photoconductive element of image forming apparatus A method of adjusting a surface potential sensor for measuring the surface potential of a photoconductive element, or image carrier, included in an electrophotographic image forming apparatus. The method uses the substrate of the photoconductive element a... | 04/06/1993 |
| 5182596 | Device for measuring surface potentials at photosensitive body and electrostatic recording apparatus using said device A device for measuring a surface potential at a photosensitive body including: a potential sensor for measuring surface potentials at a plurality of positions on the photosensitive body; a plurality of sample hold circuits; and an adder for adding each me... | 01/26/1993 |
| 5138380 | Electrostatic recording apparatus, method of controlling the apparatus, and method of evaluating life of photoconductive member of electrostatic recording apparatus A potential of a reference potential measure section is set to a desired value of a potential of a drum surface (charge receptive surface) such that a potential of the reference potential measure section and a potential of the charge receptive surface are... | 08/11/1992 |
| 5061960 | Preexposure light control system for a photocopier A slit exposure type photocopier apparatus includes an original document platform on which an original document is to be located. An electrostatic latent image support member receives a projected image of the original document as a result of a scanning op... | 10/29/1991 |
| 5043765 | Image forming apparatus including control means responsive to image forming conditions An apparatus has an image forming device for forming an image on a recording member, a digital computer having a memory storing a program for controlling the image formation by the image forming device, and a display device for displaying a task currently... | 08/27/1991 |
| 5040021 | Transmission densitometer by using differential comparison of electrostatic voltage signals A transmission densitometer determines the optical density of an electrically charged layer of toner material on a photoconductive layer by exposing the photoconductive layer to radiation through the toner layer such that the amount of exposure is charact... | 08/13/1991 |
| 5017964 | Corona charge system and apparatus for electrophotographic printing press In a high speed electrophotographic printing apparatus and method wherein a charge of desired polarity and potential is applied uniformly to a photoconductive surface of a rapidly rotating drum, an improvement is provided which comprises an electrometer l... | 05/21/1991 |
| 5005049 | Copying machine with capacity to measure transparency of original A copying machine of the present invention measures light transmittance of a document so as to adjust copying concentration on the basis of the measured result. The copying concentration is concretely adjusted by adjusting electrification voltage of a pho... | 04/02/1991 |
| 4801967 | Voltage sensing in A.C. corotrons A voltage measuring device in an electrostatographic arrangement having a photoreceptor member charged to a uniform voltage level prior to imagewise discharge, and including at least a first corotron having a corona producing coronode driven with an A.C. ... | 01/31/1989 |
| 4748465 | Method and apparatus for controlling charge on a photoconductor In an electrophotographic reproduction apparatus and method a corona charger is used for depositing an electrostatic charge of one polarity upon a moving photoconductor prior to making an exposure. In a calibration phase, an electrometer moves across the ... | 05/31/1988 |
| 4613228 | Surface potentiometer A surface potentiometer having a movable shield member for intermittently shielding a clearance between a measurement electrode and a surface to be measured to cause a potential of the surface to be measured to be induced as an AC signal in the measuremen... | 09/23/1986 |
