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| 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 |
