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| Number | Title | Issue Date |
| 8135318 | Image forming apparatus, image forming method, and secondary transfer unit An image forming apparatus includes an image transfer section configured to transfer a reversed image based on a read original image onto an image carrier as a toner image, a secondary transfer roller configured to come into contact with the image carrier and transf... | 03/13/2012 |
| 8121527 | Image forming apparatus having a neutralizing member of determined resistivity An exit blade is arranged on a downstream side of a transfer nip formed between a photosensitive element and a primary transfer roller, with an intermediate transfer belt being put therebetween, and brought into contact with an internal surface of the intermediate t... | 02/21/2012 |
| 8103202 | Transfer belt for electrophotography and image forming apparatus equipped therewith A transfer belt for electrophotography comprises at least a polyphenylene sulfide resin and a conductive agent, preferably further a nylon resin, wherein a deviation in surface resistivity is 1 or less; and an imag... | 01/24/2012 |
| 8099032 | Image forming apparatus An image forming apparatus includes an image carrier; a movable endless belt member forming a nip between the image carrier; and a transfer roller made of metal contacting the belt member at a region corresponding to the nip. At the nip, a toner image on the image c... | 01/17/2012 |
| 8095056 | Pressure-applying device, transfer device, and image forming apparatus A pressure-applying device includes a swingable unit body, a roller, an opposing member, a pressure-applying unit, and a drive-force transmitting unit. A swinging center of the unit body is set at a position distinct from a rotation center of the drive-force transmi... | 01/10/2012 |
| 8081913 | Image forming apparatus An intermediate transfer belt and a photosensitive member form a transfer nip. An electrode is arranged close to an inner surface of the intermediate transfer belt in a portion on an upstream side of a direction of endless movement of the intermediate transfer belt ... | 12/20/2011 |
| 8078090 | Transfer device and image forming apparatus including the same A transfer device includes: a first transfer belt; a first and second roller on which the first transfer belt is wound; a second transfer belt which makes contact with the first transfer belt; a third roller on which the second transfer belt is wound, and which make... | 12/13/2011 |
| 8068776 | Coated transfer member An intermediate transfer member that is fully coated with a self crosslinked acrylic resin. ... | 11/29/2011 |
| 8010027 | Image forming apparatus An image forming apparatus includes an image transfer belt, a first pressure member, a second pressure member, and an adjustable tension member. The image transfer belt is trained around multiple rollers for rotation along an endless belt travel path to convey an im... | 08/30/2011 |
| 7917072 | Image forming apparatus and belt transporting apparatus with moving member The image forming apparatus is provided with: an image carrier that holds an image; an endless transfer belt that is rotated while sandwiching a recording medium therebetween, and transfers the image on the image carrier to the recording medium; a first roll member ... | 03/29/2011 |
| 7840169 | Transfer roll and image forming apparatus A transfer roll including a metal shaft, one or more elastic layers provided around the periphery of the metal shaft, and a surface layer including a foam-containing layer provided around the periphery of the one or more elastic layers. ... | 11/23/2010 |
| 7831185 | Image forming apparatus capable of smooth transmission of recording medium Disclosed is an image forming apparatus including a first member having a surface endlessly moving in a specific direction a second member having a surface endlessly moving in the specific direction at a region facing the surface of the first member, and a supportin... | 11/09/2010 |
| 7826784 | Transfer unit, photoconductor cartridge and image forming apparatus A transfer unit includes a transfer roller. The transfer roller includes an electrically conductive rotation shaft, a conductive elastic layer for covering a periphery of the rotation shaft, and a semiconductive cover layer provided between the rotation shaft and th... | 11/02/2010 |
| 7751765 | Image forming apparatus with transferring member to transfer toner image onto the recording medium There is described an image forming apparatus, which prevent toner from contaminating inside of the apparatus and the recording medium. The apparatus includes: an image bearing member; and a transferring member that press-contacts the image bearing member for transf... | 07/06/2010 |
| 7738825 | Endless belt having deformation prevention qualities, and image forming apparatus that uses the endless belt A belt is entrained on a plurality of rollers and runs when the rollers are driven to rotate. A bead is attached to the belt and prevents the belt-like member from running crooked. The bead includes a first layer formed of a first material having a first hardness an... | 06/15/2010 |
| 7711301 | Image transfer device for image forming apparatus An image transfer device provided in an image forming apparatus in which, employing an endless belt as an intermediate transfer member, image transfer is performed at nip positions of a primary transfer portion and secondary transfer portion. Generation of warp in t... | 05/04/2010 |
| 7593677 | Image forming apparatus with decreased potential difference between a belt member transfer portion and a belt member bending portion An object of the present invention is to provide an image forming apparatus including a belt-shaped image bearing member; a first transfer member which abuts on the outer peripheral surface of the image bearing member; a second transfer member which abuts on an inne... | 09/22/2009 |
| 7486919 | Transfer apparatus and image forming apparatus A transfer unit transfers an image formed on an image bearing body (a photoconductive drum or an intermediate transfer belt) onto a medium by an electrostatic force. The transfer unit includes a transfer belt and a transfer roller. The transfer roller extends parall... | 02/03/2009 |
| 7466948 | Transfer station for an electrographic printer or copier A transfer printing station is provided with a transfer roller for transfer of a toner image generated on an intermediate carrier onto at least one recording medium in a transfer printing region of the transfer printing station. A drive unit causes the transfer roll... | 12/16/2008 |
| 7440720 | Image forming apparatus and image transferring unit for the same An image forming apparatus of the present invention includes a plurality of image carriers arranged side by side and a charging device, exposing device and developing device arranged around each image carrier. An image transferring unit includes an image transfer be... | 10/21/2008 |
| 7428400 | Primary transfer unit of image forming apparatus A primary transfer unit includes transfer units for performing a toner transfer from image carriers onto a transfer belt. Each of the transfer units is formed with a metallic roller. The metallic roller is arranged so as to satisfy θ1 | 09/23/2008 |
| 7418218 | Conductive backer brush for electrostatic brush cleaning of a belt without a ground layer A transfer cleaning station for an electrostatic marking system is provided. In this station, the upper surface of a movable transfer belt is cleaned by a rotating electrostatic cleaning brush (ESB). To improve cleaning performance and conserve space, a grounded con... | 08/26/2008 |
| 7418221 | Transfer unit used with image forming apparatus A transfer unit used with an image forming apparatus includes an upper housing having a transfer belt of an endless track structure to transfer an image from a photoconductive unit of a main body of the image forming apparatus, and a plurality of rollers to support ... | 08/26/2008 |
| 7412187 | Apparatus and method for cleaning the transfer roller of image forming apparatus An apparatus and method for cleaning a transfer roller of a wet-type image forming apparatus are provided. The method includes applying a measured voltage to the transfer roller; measuring a resistance among a transfer backup roller, an intermediate transfer medium,... | 08/12/2008 |
| 7409182 | Brush member and transfer device and image forming apparatus using the same In an image forming apparatus, a transfer brush with length of raised bristles on the surface of a metal holder equal to or smaller than 5.8 millimeters is used. Alternatively, a transfer brush with a maximum bristle inclination amount of raised bristles in a brush ... | 08/05/2008 |
| 7406277 | Semiconductive rubber member A conductive rubber roller 10 has a conductive rubber layer 1, containing chloroprene rubber, and composes an outermost layer thereof. When an alternating current is applied to the conductive rubber roller 10 at a voltage of five and a frequency... | 07/29/2008 |
| 7400853 | Transfer device and image forming apparatus A transfer device includes a transfer roller that is rotatably provided facing an image carrying member, an urging device that urges the transfer roller in a direction that the transfer roller presses the image carrying member, and a regulating roller that is provid... | 07/15/2008 |
| 7398043 | Image forming apparatus free of defect due to substances bleeding from transferring member An image forming apparatus includes an image bearing member for carrying a toner image; a toner image developing device for forming a toner image on the image bearing member; a transfer roller for contacting the image bearing member to form a nip therebetween and fo... | 07/08/2008 |
| 7389076 | Belt transfer device and image forming apparatus having the same A belt transfer device prevents the dragging of an image during a transfer process that transfers an image from a photosensitive body onto a transfer belt. The belt transfer device includes a transfer belt that contacts the surface of a photosensitive body, and at l... | 06/17/2008 |
| 7386263 | Device and method for electrically charging a transport belt using a contact lip made of a rubber material A device for electrically charging a transport belt for transport of recording media in a transfer printing area of an electrographic printer or copier as well as a method for charging. In a direction transverse to a running direction of the transport belt, a contac... | 06/10/2008 |
| 7383006 | Image forming apparatus An image forming apparatus including a transfer member urging unit that urges a transfer member to an image bearing drum at a line pressure of 18.62×10−3 N/mm or less and 2.47×10−3 N/mm or more, the line pressure being taken along a direc... | 06/03/2008 |
| 7379694 | Belt transfer apparatus and image forming device A combined resistance R1=Vt1/I1 (MO) of a transfer belt (61) and a recording sheet obtained when a transfer current I1 (μA) passes through the transfer belt (61) and the recording sheet upon application of a first transfer ... | 05/27/2008 |
| 7376375 | Belt-drive control device, color-shift detecting method, color-shift detecting device, and image forming apparatus A mark detecting unit detects a mark that is a reference position of an endless belt. An angular-displacement-error detecting unit detects an angular displacement error of an encoder caused by thickness fluctuation of the endless belt. A first calculating unit calcu... | 05/20/2008 |
| 7369793 | Belt unit for image-forming apparatus A belt unit is detachably mountable in an image-forming apparatus. The belt unit includes: at least two rollers, each having a roller shaft; an endless belt looped around the two rollers; and an outer frame disposed around the endless belt and having two roller-supp... | 05/06/2008 |
| 7362993 | Transfer device and image forming apparatus In a transfer device, a driving roller that rotationally drives a belt member satisfies a condition “(R2−R1)π×(s−1)×p/(R1×π×2)≦0.15 millimeter”, where R1 is a diameter of the driving roller under an environ... | 04/22/2008 |
| 7343129 | Image forming apparatus An image forming apparatus includes a shaft, a shaft support portion rotatably supporting the shaft, a shaft gear provided at an end portion of the shaft in a lengthwise direction, and a first gear engaged with the shaft gear and rotating the shaft gear. The rotatio... | 03/11/2008 |
| 7335420 | Feed/transport roller The invention provides a feed/transport roller formed of polyurethane material, which roller has high wear resistance as well as low hardness for providing excellent sheet feeding capacity and which meets a recent requirement; i.e., high durability for allowing high... | 02/26/2008 |
| 7333761 | Transfer media transport guide mechanism for image forming device An image forming device is disclosed that can control image blurring, image contraction, and the like when resilient transfer media such as cardboard is to be transported upward from a pair of resist rollers and guided to a transfer position, and obtain a suitable t... | 02/19/2008 |
| 7333744 | Image forming apparatus that charges a photosensitive member by superimposing an alternate current bias voltage on a direct current bias voltage as the charge bias voltage A charge apparatus charges by uniformly superimposing an alternate current bias voltage with a fixed frequency over a direct current bias voltage as the charge bias voltage on a photosensitive member. An exposure apparatus exposes the surface of the charged photosen... | 02/19/2008 |
| 7330689 | Method for detecting damage of a heating roller of a fixing apparatus based on its peripheral speed A fixing apparatus includes a fixing device configured to, by allowing a sheet having a developing agent image on it to pass between a heating roller and a pressing roller set in contact with the heating roller, fix the developing agent image in which at least one o... | 02/12/2008 |
