Did You Know...
...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7266330 | Developer supply container with shutter movement prevention feature A developer supply container detachably mountable to a developer receiving device having a receiving opening for receiving a developer, an apparatus shutter for opening and closing the receiving opening, the developer supply container including a container body for ... | 09/04/2007 |
| 7019870 | Image forming apparatus An image forming apparatus includes an upper body, an image reading device that is mounted in the upper body, a lower body that is placed under the upper body, an image forming device that is mounted in the lower body, a hinge member that connects the upper body and... | 03/28/2006 |
| 6917779 | Toner conveying device and image forming apparatus including the toner conveying device A toner conveying device includes a toner container that contains toner, a toner discharge urging device that urges the discharge of the toner from the toner container, a toner conveying mechanism that conveys the toner discharged from the toner container through a ... | 07/12/2005 |
| 6606463 | Optical toner concentration sensor A toner maintenance system for an electrophotographic developer unit, including a sump for storing a quantity of developer material comprised of toner material; a first member for transporting developer material from the sump, a viewing window, in communi... | 08/12/2003 |
| 6505008 | Developer container, process cartridge, developing device, and image forming apparatus with toner sensor wiping member orientation A developer container for containing a developer includes a detecting member for detecting a developer amount having an electrode member having a pair of input-side and output-side electrodes formed in parallel and in one plane at a predetermined interval... | 01/07/2003 |
| 5991559 | Solute concentration control method and apparatus A control apparatus for controlling a concentration of a solute having a predetermined optical absorption characteristic is disclosed. A cell holding member has a plurality of cells formed therein, one of which is placed at a predetermined detection posit... | 11/23/1999 |
| 5933685 | Apparatus for detecting concentration of developer by measurement of optical transmissivity A developer concentration detection apparatus is provided, which includes a base member in which a developer accommodation space is formed, an electrode plate member installed in the base member so that a toner included in a developer in the developer acc... | 08/03/1999 |
| 5860041 | Device for measuring toner concentration in developer comprising toner and carrier A device for measuring toner concentration of developer housed in a developing system, which developer comprising toner and carrier. The device has a transparent detection window facing the interior of the developing system, which transparent detection wi... | 01/12/1999 |
| 5697014 | Toner level detecting device having a substantially non-uniform width and toner storage box having same A toner level detecting device on a toner fillable box includes first and second toner detecting portions formed of a light transmissive material and a toner fillable aperture formed between the first and second toner detecting portions, wherein the toner... | 12/09/1997 |
| 5383007 | Apparatus for measuring developer density by reflected light from the developer illuminated through a detection window Apparatus for measuring developer density comprising, a developer agitator section agitating a developer, a rotational conveying member conveying the developer in the developer agitator section with its rotation, a transparent detection window facing the ... | 01/17/1995 |
| 5235388 | Method and apparatus for determining toner charge-to-mass ratio A method and apparatus for determining the charge-to-mass ratio of electroscopic toner particles of the type used in electrostatographic recording to develop electrostatic images. The apparatus uses a biased electrode for attracting toner particles theret... | 08/10/1993 |
| 5216469 | Apparatus for controlling toner density in a developing device of an electrophotographic or electrostatic image forming apparatus A developing device in an image forming apparatus has a developing sleeve through which a two-component toner material is applied onto a photosensitive surface. The developing device has an optical sensor assembly including a sensor casing opening towards... | 06/01/1993 |
| 5117259 | Apparatus for measuring developer density Apparatus for measuring developer density comprising, a container containing a developer constituted by a toner and a carrier, a rotary member agitating the developer in the container with its rotation, a transparent detection window facing the container,... | 05/26/1992 |
| 4998141 | Electret toner concentration monitor A toner concentration monitor includes a polarized dielectric member which, when dipped into a development mixture of carrier and toner particles, provides an accurate indication of the toner concentration of the mixture by the amount of toner particles w... | 03/05/1991 |
| 4804996 | Charged particle sensor having magnetic field control An apparatus in which the developability of electrostatically charged particles in a mixture of particulate material is measured. The apparatus includes a transparent member positioned closely adjacent to a developer roller of an electrophotographic print... | 02/14/1989 |
| 4684236 | Toner concentration detecting device for dry type electrographic copy machine In a toner concentration detecting device wherein developer is carried by a roll from a developer flowpath to a detection station for optical detection thereof, a restriction element is provided adjacent the roll between the developer flowpath and detecti... | 08/04/1987 |
| 4648702 | Toner density detector and toner supplier A toner density detecting device has NESA glass, a bias voltage source, a resistor and/or a varistor or Zener diode, and a luminosity detecting circuit which detects the density of toner adhering to the NESA glass using a light source and a photodiode as ... | 03/10/1987 |
| 4451135 | Toner concentration detecting device A toner concentration detecting device for detecting the toner concentration of a dry-type, two-component developer including a transparent plate arranged to be brought into contact with the developer, a light source for projecting light toward the develo... | 05/29/1984 |
| 4447145 | Charged particle sensor An apparatus in which the developability of electrostatically charged particles in a mixture of particulate material is measured. The apparatus includes a pair of spaced-apart conductive plates through which at least a portion of the particulate mixture f... | 05/08/1984 |
| 4431300 | Automatic developability sensing in electrophotographic printing An apparatus in which the developability of electrostatically charged particles in a mixture of particulate material is measured. The apparatus includes a transparent member positioned closely adjacent to a developer roller of an electrophotographic print... | 02/14/1984 |
| 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 |
| 4346985 | Automatic development control An automatic development control for use in an electrophotographic apparatus. The control includes a pair of substantially planar members forming a channel therebetween through which developer flows. One of the members is constructed such that an electros... | 08/31/1982 |
| 4330193 | Development system Apparatus in which a plurality of spaced apart magnetic members transport developer material from a supply thereof. The spaces between adjacent magnetic members enable extraneous developer material to pass therethrough and return to the storage supply the... | 05/18/1982 |
| 4275956 | Developing 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. To overco... | 06/30/1981 |
| 4266141 | Toner developing ability measuring system for electrostatography A powdered developer (26) comprising carrier and toner particles is caused to flow by gravity downwardly through a passageway (71). A transparent electrode (62) is disposed in the passageway (71). A light source (64) and photosensor (66) are arranged on o... | 05/05/1981 |
| 4256402 | Method and apparatus of detecting toner concentration of dry developer A method and apparatus to detect the toner concentration of two component dry developer comprising toner and carrier includes the use of a toner catcher having a conductive member and which is capacitively charged. The developer is applied to the catcher,... | 03/17/1981 |
| 4236486 | Toner concentration control device A toner concentration control device comprises a toner supply mechanism for supplying a toner to a developing device, a probe for picking up the toner in the developing agent after development is effected and a control mechanism for controlling the toner ... | 12/02/1980 |
| 4226525 | Electrostatic copying machine An exposure unit radiates a light image of an original document onto a charged photoconductive member to form an electrostatic image through localized photoconduction. A developing unit applies a powdered developing substance comprising carrier particles ... | 10/07/1980 |
