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| Number | Title | Issue Date |
| 8107858 | Discharger and process cartridge A discharger is provided, which can eliminate charge from a surface of a photoconductor. The discharger includes: a light source; a light guide member; a cover which covers the light guide member to expose at least an opposed surface of the light guide member to the... | 01/31/2012 |
| 8064799 | Electrophotographic image forming apparatus with light source to electrically discharge charge remaining on drum An electrophotographic image forming apparatus includes a cartridge supporting member movable between an inside position inside the main assembly of the apparatus and an outside position outside the main assembly, a light source, a light guide member, on the cartrid... | 11/22/2011 |
| 8055156 | Image-forming apparatus which can eliminate static electricity An image-forming apparatus includes an electrophotographic photoreceptor including a photosensitive layer, an exposure unit for irradiating the electrophotographic photoreceptor with light, a pressing member pressed against the photosensitive layer of the electropho... | 11/08/2011 |
| 8041261 | Image forming apparatus with a light scanning lamp blocking device, operating method thereof and a cartridge usable with the image forming apparatus An image forming apparatus includes a photosensitive body, a light scanning lamp, and a lamp controller. The image forming apparatus has a surface capable of accepting an electric potential. The light scanning lamp can scan a lamp light toward the photosensitive bod... | 10/18/2011 |
| 8010018 | Discharger and process cartridge A discharger is provided, which can eliminate charge from a surface of a photoconductor. The discharger includes: a light source; and a light guide member which extends in a first direction to be opposed to the surface of the photoconductor in a second direction sub... | 08/30/2011 |
| 7979003 | Image forming apparatus and image forming method The image forming apparatus including: a photoconductor provided with a charge generation layer and an overcoat layer; a first charging unit charging the photoconductor when an image is formed; an exposure unit irradiating the photoconductor with light having a wave... | 07/12/2011 |
| 7965960 | Light guide and charge eliminating unit, image forming apparatus and image reading apparatus having the same Disclosed are a light guide member, a charge eliminating unit and an image forming apparatus and/or an image reading apparatus having the same. The light guide member may include an incidence face through which light is introduced, an irregular reflection portion ar... | 06/21/2011 |
| 7907871 | Image forming apparatus An image forming apparatus that is more capable of preventing the occurrence of image quality deterioration caused by defective charging of a photoreceptor than the conventional one. As a charging device, there is used a member which has: a conductive sheet that cau... | 03/15/2011 |
| 7899363 | Image forming apparatus An image forming apparatus is constituted by a rotatable image bearing member; a charging member for electrically charging the image bearing member in contact with the image bearing member; developing member, containing polishing particles, for collecting toner from... | 03/01/2011 |
| 7894749 | Image forming apparatus capable of resetting and decreasing a surface potential of a photosensitive member An image forming apparatus including: a plurality of photosensitive members on which electrostatic latent images are formed; a plurality of charge units to charge the respective photosensitive members with an electric potential; at least one exposure unit which irra... | 02/22/2011 |
| 7848678 | Image forming apparatus and process cartridge An image forming apparatus comprising an image holding member that is rotationally driven, the image holding member comprising, on a substrate, a subbing layer and a photosensitive layer, a volume resistance value of the subbing layer decreasing in a rotation axis d... | 12/07/2010 |
| 7848679 | Image forming apparatus An image forming apparatus includes a standard exposure device (1) adjusted to emit light of a predetermined light quantity, and a control device configured to determine light quantity of the pre-charge exposure device in an image-forming period based on the ... | 12/07/2010 |
| 7844200 | Image forming apparatus with a pre-exposure light control feature An inexpensive image forming apparatus, which can suppress a ghost to obtain an image maintaining satisfactory density and gradations for a long time. The apparatus including an electrophotographic photosensitive member, a contact charger in contact with the photose... | 11/30/2010 |
| 7831176 | Image forming apparatus with residual toner transfer feature An image forming apparatus is constituted by a rotatable image bearing member; a charging member for electrically charging the image bearing member in contact with the image bearing member; developing member, containing polishing particles, for collecting toner from... | 11/09/2010 |
| 7805094 | Image forming apparatus and charge removing device thereof An image forming apparatus and a charge removal device thereof capable of evenly irradiating light to a photosensitive body are disclosed. The charge removal device includes a charge removal lamp, which may be mounted outside the length of the photosensitive body, a... | 09/28/2010 |
| 7725054 | Electrifying apparatus, a processing unit, and an image formation apparatus An electrifying apparatus, a processing unit including the electrifying apparatus, and an image formation apparatus including the electrifying apparatus. The electrifying apparatus includes a conductive sheet for electrifying at least one of a surface of a photocond... | 05/25/2010 |
| 7580654 | Image forming apparatus featuring discharge prevention in a transfer separation area An image forming apparatus includes a movable bearing member; a charging device for electrically charging the image bearing member at a charging position; a transferring device for contacting the image bearing member at the transfer position and for transferring a t... | 08/25/2009 |
| 7574159 | Image forming apparatus and method of preventing carrier from adhering to photo receptor An image forming apparatus and a method of preventing a carrier from adhering to a photosensitive drum are provided. The image forming apparatus includes a photosensitive drum on which an electrostatic latent image is formed by an exposure unit, a main motor which r... | 08/11/2009 |
| 7558506 | Static removing device for an image forming apparatus An image-forming device according to the present invention includes an electrophotographic photoreceptor including a photosensitive layer, a pressing member pressed against the photosensitive layer of the electrophotographic photoreceptor to remove a deposit from th... | 07/07/2009 |
| 7555241 | Image forming device using a single-layer-type electrophotographic photoconductor and image forming method using the same An image forming apparatus which can exhibit an excellent charge eliminating effect by erasing a transfer memory using a precharging device with optimized conditions even when a positively-charged single-layer-type electrophotographic photoconductor is used as a pho... | 06/30/2009 |
| 7522862 | Neutralization device and image forming unit for use in image forming apparatus, and the image forming apparatus A neutralization device is disposed in an image forming apparatus having an image carrier so as to face the image carrier. The device comprises: a light irradiation section that irradiates neutralization light onto the image carrier; a case member that accommodates ... | 04/21/2009 |
| 7463849 | Image forming apparatus including static pre-eliminator An image forming apparatus includes a photosensitive member being movable in a predetermined direction; a charging roller that charges a surface of the photosensitive member; and a static pre-eliminator that eliminates static electricity by irradiating the surface o... | 12/09/2008 |
| 7428388 | Image formation apparatus with image correction capability An image formation apparatus includes an imaging light source, a photosensitive body and a correction light source. The imaging light source outputs light modulated in accordance with image data representing an image. An electrostatic latent image is formed at the p... | 09/23/2008 |
| 7424250 | Methods and devices for removing latent image ghosts photoreceptors A ghost removing device for a marking apparatus includes a photoreceptor, a primary charging device, an erase light generating device to generate an erase light when activated, a voltage source to supply a charge voltage to the primary charging device, and a control... | 09/09/2008 |
| 7421229 | Image forming apparatus Charge removing light is guided by an optical path defining member (623) from a charge removing unit (6) toward a photosensitive drum (2). A distance between an end surface (623e) of the optical path defining member (623) an... | 09/02/2008 |
| 7395011 | Image forming apparatus with cleaning device for removing remaining toner from outer surface of photosensitive member An image forming apparatus has a charge roller, a charge erasing device and a preliminary voltage-applying member disposed around a rotationally movable photosensitive member. The charge roller subjects a surface of the photosensitive member to a charge process whil... | 07/01/2008 |
| 7395010 | Image forming apparatus that permits adjustment of a distance between a light source and a photoconductor An image forming apparatus has a charge removing unit (31) between a transfer roller (11) for transferring a toner image from a surface of a photosensitive drum (4) to a transfer member and a charging unit (3) for electrostatically chargi... | 07/01/2008 |
| 7347611 | Optical guide and image forming apparatus using the same An optical guide and an image forming apparatus which uses the optical guide in an eraser or an auxiliary transfer device. The optical guide guides light incident through one side in a lengthwise direction, makes the light in an effective width range of the lengthwi... | 03/25/2008 |
| 7319835 | Image forming device having first and second light providing units An image forming device, including a charging unit to electrically charge a surface of an organic photoconductive medium; a light exposure unit to form an electrostatic latent image on the surface of the organic photoconductive medium; a developing unit to develop t... | 01/15/2008 |
| 7281779 | Apparatus and method for measuring the length change of the feed spindle in an exposer for printing originals Measuring a feed spindle length change in a printing exposer, having at least one exposure head on a carrier moved axially along the drum in a feed direction by a stepping motor and the spindle, carries out the measurement by determining the number of stepping motor... | 10/16/2007 |
| 7265773 | Misalignment detection device, optical writing apparatus, and image forming apparatus An image detection device includes a light source, an image sensor, a light guiding device, an image focusing device and a housing. The light source is configured to irradiate a pattern image with a light beam. The light guiding device is located on a first light pa... | 09/04/2007 |
| 7252914 | Toner for electrophotography and developer for electrophotography using the same, process cartridge, apparatus for forming image, and method for forming image A toner for electrophotography fulfilling both the fixability and the void resistance at high level, and forms a high-quality image. The toner for electrophotography contains: a binder resin; and a wax component which contains: a first wax having an endothermic peak... | 08/07/2007 |
| 7224915 | Image forming apparatus and image forming unit An image forming apparatus comprising: an image forming section and a residual toner amount detection unit. The image forming section includes a photosensitive member, a charging unit, an exposure unit, a developing unit, and a toner storage unit. The residual toner... | 05/29/2007 |
| 7218879 | Image forming apparatus controlling polarity of residual toner and process cartridge for use in the same An image forming apparatus includes an image carrier, a charging device configured to uniformly charge a surface of the image carrier with a charging member applied with a bias of a first polarity (e.g. a negative polarity) for charging. A latent image forming devic... | 05/15/2007 |
| 7194229 | Method and apparatus for forming superimposed toner images of a plurality of colors When superimposing toner images of a plurality of colors on an image supporting member to form a color image, a free phase ion in a precedent image is removed without distorting the toner image precedently formed on the image supporting member, thereby improving rep... | 03/20/2007 |
| 7155152 | Method of image transfer, method of and apparatus for image forming A charge removing unit is provided in order to control the surface potential of an image bearing element by removing charge from a surface of the image bearing element before a toner image is transferred from the image bearing element to a transfer medium. Surface p... | 12/26/2006 |
| 7149447 | Image forming device having an electrifying member in contact with an image carrier An image forming device is provided that is capable of easily preventing occurrence of stripe-like image noise that may be caused by intimate contact between a contact electrifying member and an image carrier even when an image forming operation is stopped for a whi... | 12/12/2006 |
| 7113713 | Image forming apparatus using an electrophotographic process An image forming apparatus includes a first image bearing member, a movable second image bearing member, a charging device and a voltage applying device. A toner image is transferred from the first image bearing member to the second image bearing member at a first t... | 09/26/2006 |
| 7092649 | Charging device and image forming apparatus provided therewith An image forming apparatus has a charging member opposed to an outer circumferential surface of a rotating object to be charged. The image forming apparatus has a voltage applying section for applying a pulsating voltage Vsp between the charging member and the objec... | 08/15/2006 |
| 7088941 | Image forming apparatus having a transfer-exposure device, and image forming method thereof An image forming apparatus having a photoconductor for carrying a toner image; a transfer device, provided with a discharge wire, for transferring the toner image onto a transfer material through discharge in a transfer area, after a transfer material is superposed ... | 08/08/2006 |
